#serversecurity — Public Fediverse posts

🛡️ Oh look, another thrilling #update on how your beloved #Nginx can turn into a #cybersecurity disaster waiting to happen! 🎉 Kudos to the internet heroes who found these digital booby traps—just don’t forget to #patch them up before your server becomes a hacker’s playground! 🙄🔧
https://nginx.org/en/CHANGES #Vulnerability #InternetHeroes #ServerSecurity #HackerNews #ngated

CPanel's Black Week: 3 New Vulnerabilities Patched After Attack on 44k Servers

https://www.copahost.com/blog/cpanels-black-week-three-new-vulnerabilities-patched-after-ransomware-attack-on-44000-servers/

#HackerNews #CPanel #Vulnerabilities #BlackWeek #Cybersecurity #Ransomware #ServerSecurity

Ah, the thrilling saga of cosmic whispers! 🚀 Too bad it's more like a muted scream from Antarctica's ice, blocked by a 400 Bad Request. 🔒 Even the universe can't penetrate the impenetrable fortress of server security — cosmic irony at its finest. 🙄
https://phys.org/news/2026-04-deep-antarctic-ice-cosmic-strange.html #cosmicwhispers #Antarctica400BadRequest #serversecurity #cosmicirony #mutedscream #HackerNews #ngated

What is Port Knocking Implementation and Security: A Comprehensive Guide

https://denizhalil.com/2026/04/06/port-knocking-implementation-security-guide

#CyberSecurity #PortKnocking #NetworkSecurity #DefenseInDepth #LinuxSecurity #ServerSecurity

Oh joy, another groundbreaking revelation: #SSH #certificates are like the ultimate VIP pass for servers, sparing us the nail-biting suspense of wondering if we're chatting with the right machine 🤯. Because surely, the average user isn't just mindlessly hitting 'yes' and hoping for the best 🤦‍♂️. Who knew server security could be this exhilarating? 🎉
https://jpmens.net/2026/04/03/ssh-certificates-the-better-ssh-experience/ #ServerSecurity #VIPPass #Cybersecurity #TechHumor #HackerNews #ngated

Two weeks ago we published our analysis of TURN security threats. Today: how to fix them.

New guides covering implementation-agnostic best practices (IP range blocking, protocol hardening, rate limiting, deployment patterns) and coturn-specific configuration with copy-paste templates at three security levels.

Best practices: https://www.enablesecurity.com/blog/turn-security-best-practices/
coturn guide: https://www.enablesecurity.com/blog/coturn-security-configuration-guide/
Config templates on GitHub: https://github.com/EnableSecurity/coturn-secure-config

coturn 4.9.0 dropped yesterday with fixes for CVE-2026-27624 (IPv4-mapped IPv6 bypass of deny rules) and an inverted web admin password check that had been broken since ~2019. The guides cover workarounds for older versions.

#infosec #webrtc #security #TURN #coturn #penetrationtesting #voip #serversecurity

Server Security Checklist — Essential Hardening Guide

Securing your servers isn’t optional — it’s your first line of defense against data breaches, ransomware, insider threats, and lateral movement. Use this checklist as a baseline for Linux, Windows, cloud, hybrid, or on-prem servers.

⸻

🔧 1. System & OS Hardening
• Keep OS & packages updated (apply security patches frequently).
• Remove / disable unused services & software.
• Enforce secure boot + BIOS/UEFI passwords.
• Disable auto-login and guest accounts.
• Use minimal OS images only (reduce attack surface).

⸻

🔐 2. Access Control
• Enforce strong passwords & MFA everywhere.
• Use RBAC & least privilege access.
• Disable root/Administrator login over SSH/RDP.
• Rotate credentials & keys regularly.
• Implement just-in-time access for privileged users.

⸻

🌐 3. Network Security
• Restrict inbound/outbound traffic via firewalls.
• Segment critical servers from general LANs/VLANs.
• Disable unused ports & protocols.
• Enable DoS/DDoS protection.
• Apply zero-trust network principles.

⸻

🔑 4. Secure Remote Access
• Use SSH key-based authentication (disable password login).
• Enforce VPN for admin access.
• Log & monitor all remote access sessions.
• Disable legacy protocols (Telnet, FTP, SMBv1).
• Require bastion/jump host for critical access.

⸻

📊 5. Logging & Monitoring
• Enable centralized logging (syslog / SIEM).
• Track failed login attempts & anomalies.
• Configure alerts for privilege escalation or config changes.
• Monitor log tampering.
• Retain logs securely for audits & forensics.

⸻

🔒 6. Data Protection
• Encrypt data at rest (LUKS, BitLocker, etc.).
• Encrypt data in transit (TLS 1.2+).
• Strict database access policies.
• Regular, offline, immutable backups.
• Test restore procedures (don’t assume backups work).

⸻

🔁 7. Application & Patch Management
• Keep middleware, frameworks, and apps patched.
• Delete default credentials & sample files.
• Enable code signing for software packages.
• Use secure coding practices (OWASP Top 10).
• Implement dependency scanning (Snyk, Trivy, etc.).

⸻

🛡️ 8. Malware & Intrusion Defense
• Deploy EDR/AV on endpoints.
• Enable IDS/IPS at network edge.
• Automatic vulnerability scans (schedule weekly/monthly).
• Monitor persistence techniques (cron, startup scripts).
• Block known malicious IP ranges & TLDs.

⸻

🏢 9. Physical & Cloud Security
• Restrict physical access to server racks/rooms.
• Enable provider security tools (AWS Security Groups, Azure NSG, IAM).
• Harden cloud images (CIS benchmarks).
• Review cloud logging & audit trails regularly.
• Disable unused cloud API keys / roles.

⸻

📜 10. Policy & Compliance
• Use CIS / NIST / ISO-27001 benchmarks.
• Track & document every access change.
• Force annual access reviews & key rotation.
• Perform regular security training for admins.
• Maintain disaster recovery & incident plans.

⸻

➕ Additional 5 Critical Controls (Advanced Hardening)

🧠 11. Privileged Access Management (PAM)
• Use jump hosts & session recording.
• Just-In-Time access for admins.
• Store keys in secure vaults (HashiCorp Vault, CyberArk).

🚨 12. Real-Time Threat Detection
• Use behavioral analytics → UEBA/XDR.
• AI-based anomaly detection recommended.
• Block suspicious IPs automatically.

🧪 13. Red Team & Pentesting
• Run regular internal pentests.
• Validate configuration weaknesses.
• Simulate phishing + lateral movement scenarios.

🧱 14. Container / VM Isolation
• Use AppArmor, SELinux, Seccomp profiles.
• Limit Docker socket access & root containers.
• Scan images before deployment.

📦 15. Automated Configuration Management
• Use IaC (Terraform, Ansible, Puppet) for repeatable and secure builds.
• Detect drift using compliance scanning.
• Version control all infrastructure.

⸻

🧠 Core Reminder

A server is only as secure as the team who maintains it.
Hardening isn’t one task — it’s an ongoing

#ServerSecurity #SystemHardening #InfoSec #CyberSecurity #BlueTeam
#DevSecOps #SysAdmin #ThreatDetection #AccessControl #NetworkSecurity
#LinuxSecurity #SecureArchitecture #RiskMitigation #SecurityChecklist
#CloudSecurity #InfrastructureSecurity #ZeroTrust #SecurityMonitoring

Server Security Checklist — Essential Hardening Guide

Securing your servers isn’t optional — it’s your first line of defense against data breaches, ransomware, insider threats, and lateral movement. Use this checklist as a baseline for Linux, Windows, cloud, hybrid, or on-prem servers.

⸻

🔧 1. System & OS Hardening
• Keep OS & packages updated (apply security patches frequently).
• Remove / disable unused services & software.
• Enforce secure boot + BIOS/UEFI passwords.
• Disable auto-login and guest accounts.
• Use minimal OS images only (reduce attack surface).

⸻

🔐 2. Access Control
• Enforce strong passwords & MFA everywhere.
• Use RBAC & least privilege access.
• Disable root/Administrator login over SSH/RDP.
• Rotate credentials & keys regularly.
• Implement just-in-time access for privileged users.

⸻

🌐 3. Network Security
• Restrict inbound/outbound traffic via firewalls.
• Segment critical servers from general LANs/VLANs.
• Disable unused ports & protocols.
• Enable DoS/DDoS protection.
• Apply zero-trust network principles.

⸻

🔑 4. Secure Remote Access
• Use SSH key-based authentication (disable password login).
• Enforce VPN for admin access.
• Log & monitor all remote access sessions.
• Disable legacy protocols (Telnet, FTP, SMBv1).
• Require bastion/jump host for critical access.

⸻

📊 5. Logging & Monitoring
• Enable centralized logging (syslog / SIEM).
• Track failed login attempts & anomalies.
• Configure alerts for privilege escalation or config changes.
• Monitor log tampering.
• Retain logs securely for audits & forensics.

⸻

🔒 6. Data Protection
• Encrypt data at rest (LUKS, BitLocker, etc.).
• Encrypt data in transit (TLS 1.2+).
• Strict database access policies.
• Regular, offline, immutable backups.
• Test restore procedures (don’t assume backups work).

⸻

🔁 7. Application & Patch Management
• Keep middleware, frameworks, and apps patched.
• Delete default credentials & sample files.
• Enable code signing for software packages.
• Use secure coding practices (OWASP Top 10).
• Implement dependency scanning (Snyk, Trivy, etc.).

⸻

🛡️ 8. Malware & Intrusion Defense
• Deploy EDR/AV on endpoints.
• Enable IDS/IPS at network edge.
• Automatic vulnerability scans (schedule weekly/monthly).
• Monitor persistence techniques (cron, startup scripts).
• Block known malicious IP ranges & TLDs.

⸻

🏢 9. Physical & Cloud Security
• Restrict physical access to server racks/rooms.
• Enable provider security tools (AWS Security Groups, Azure NSG, IAM).
• Harden cloud images (CIS benchmarks).
• Review cloud logging & audit trails regularly.
• Disable unused cloud API keys / roles.

⸻

📜 10. Policy & Compliance
• Use CIS / NIST / ISO-27001 benchmarks.
• Track & document every access change.
• Force annual access reviews & key rotation.
• Perform regular security training for admins.
• Maintain disaster recovery & incident plans.

⸻

➕ Additional 5 Critical Controls (Advanced Hardening)

🧠 11. Privileged Access Management (PAM)
• Use jump hosts & session recording.
• Just-In-Time access for admins.
• Store keys in secure vaults (HashiCorp Vault, CyberArk).

🚨 12. Real-Time Threat Detection
• Use behavioral analytics → UEBA/XDR.
• AI-based anomaly detection recommended.
• Block suspicious IPs automatically.

🧪 13. Red Team & Pentesting
• Run regular internal pentests.
• Validate configuration weaknesses.
• Simulate phishing + lateral movement scenarios.

🧱 14. Container / VM Isolation
• Use AppArmor, SELinux, Seccomp profiles.
• Limit Docker socket access & root containers.
• Scan images before deployment.

📦 15. Automated Configuration Management
• Use IaC (Terraform, Ansible, Puppet) for repeatable and secure builds.
• Detect drift using compliance scanning.
• Version control all infrastructure.

⸻

🧠 Core Reminder

A server is only as secure as the team who maintains it.
Hardening isn’t one task — it’s an ongoing

#ServerSecurity #SystemHardening #InfoSec #CyberSecurity #BlueTeam
#DevSecOps #SysAdmin #ThreatDetection #AccessControl #NetworkSecurity
#LinuxSecurity #SecureArchitecture #RiskMitigation #SecurityChecklist
#CloudSecurity #InfrastructureSecurity #ZeroTrust #SecurityMonitoring

Server Security Checklist — Essential Hardening Guide

Securing your servers isn’t optional — it’s your first line of defense against data breaches, ransomware, insider threats, and lateral movement. Use this checklist as a baseline for Linux, Windows, cloud, hybrid, or on-prem servers.

⸻

🔧 1. System & OS Hardening
• Keep OS & packages updated (apply security patches frequently).
• Remove / disable unused services & software.
• Enforce secure boot + BIOS/UEFI passwords.
• Disable auto-login and guest accounts.
• Use minimal OS images only (reduce attack surface).

⸻

🔐 2. Access Control
• Enforce strong passwords & MFA everywhere.
• Use RBAC & least privilege access.
• Disable root/Administrator login over SSH/RDP.
• Rotate credentials & keys regularly.
• Implement just-in-time access for privileged users.

⸻

🌐 3. Network Security
• Restrict inbound/outbound traffic via firewalls.
• Segment critical servers from general LANs/VLANs.
• Disable unused ports & protocols.
• Enable DoS/DDoS protection.
• Apply zero-trust network principles.

⸻

🔑 4. Secure Remote Access
• Use SSH key-based authentication (disable password login).
• Enforce VPN for admin access.
• Log & monitor all remote access sessions.
• Disable legacy protocols (Telnet, FTP, SMBv1).
• Require bastion/jump host for critical access.

⸻

📊 5. Logging & Monitoring
• Enable centralized logging (syslog / SIEM).
• Track failed login attempts & anomalies.
• Configure alerts for privilege escalation or config changes.
• Monitor log tampering.
• Retain logs securely for audits & forensics.

⸻

🔒 6. Data Protection
• Encrypt data at rest (LUKS, BitLocker, etc.).
• Encrypt data in transit (TLS 1.2+).
• Strict database access policies.
• Regular, offline, immutable backups.
• Test restore procedures (don’t assume backups work).

⸻

🔁 7. Application & Patch Management
• Keep middleware, frameworks, and apps patched.
• Delete default credentials & sample files.
• Enable code signing for software packages.
• Use secure coding practices (OWASP Top 10).
• Implement dependency scanning (Snyk, Trivy, etc.).

⸻

🛡️ 8. Malware & Intrusion Defense
• Deploy EDR/AV on endpoints.
• Enable IDS/IPS at network edge.
• Automatic vulnerability scans (schedule weekly/monthly).
• Monitor persistence techniques (cron, startup scripts).
• Block known malicious IP ranges & TLDs.

⸻

🏢 9. Physical & Cloud Security
• Restrict physical access to server racks/rooms.
• Enable provider security tools (AWS Security Groups, Azure NSG, IAM).
• Harden cloud images (CIS benchmarks).
• Review cloud logging & audit trails regularly.
• Disable unused cloud API keys / roles.

⸻

📜 10. Policy & Compliance
• Use CIS / NIST / ISO-27001 benchmarks.
• Track & document every access change.
• Force annual access reviews & key rotation.
• Perform regular security training for admins.
• Maintain disaster recovery & incident plans.

⸻

➕ Additional 5 Critical Controls (Advanced Hardening)

🧠 11. Privileged Access Management (PAM)
• Use jump hosts & session recording.
• Just-In-Time access for admins.
• Store keys in secure vaults (HashiCorp Vault, CyberArk).

🚨 12. Real-Time Threat Detection
• Use behavioral analytics → UEBA/XDR.
• AI-based anomaly detection recommended.
• Block suspicious IPs automatically.

🧪 13. Red Team & Pentesting
• Run regular internal pentests.
• Validate configuration weaknesses.
• Simulate phishing + lateral movement scenarios.

🧱 14. Container / VM Isolation
• Use AppArmor, SELinux, Seccomp profiles.
• Limit Docker socket access & root containers.
• Scan images before deployment.

📦 15. Automated Configuration Management
• Use IaC (Terraform, Ansible, Puppet) for repeatable and secure builds.
• Detect drift using compliance scanning.
• Version control all infrastructure.

⸻

🧠 Core Reminder

A server is only as secure as the team who maintains it.
Hardening isn’t one task — it’s an ongoing

#ServerSecurity #SystemHardening #InfoSec #CyberSecurity #BlueTeam
#DevSecOps #SysAdmin #ThreatDetection #AccessControl #NetworkSecurity
#LinuxSecurity #SecureArchitecture #RiskMitigation #SecurityChecklist
#CloudSecurity #InfrastructureSecurity #ZeroTrust #SecurityMonitoring

Server Security Checklist — Essential Hardening Guide

Securing your servers isn’t optional — it’s your first line of defense against data breaches, ransomware, insider threats, and lateral movement. Use this checklist as a baseline for Linux, Windows, cloud, hybrid, or on-prem servers.

⸻

🔧 1. System & OS Hardening
• Keep OS & packages updated (apply security patches frequently).
• Remove / disable unused services & software.
• Enforce secure boot + BIOS/UEFI passwords.
• Disable auto-login and guest accounts.
• Use minimal OS images only (reduce attack surface).

⸻

🔐 2. Access Control
• Enforce strong passwords & MFA everywhere.
• Use RBAC & least privilege access.
• Disable root/Administrator login over SSH/RDP.
• Rotate credentials & keys regularly.
• Implement just-in-time access for privileged users.

⸻

🌐 3. Network Security
• Restrict inbound/outbound traffic via firewalls.
• Segment critical servers from general LANs/VLANs.
• Disable unused ports & protocols.
• Enable DoS/DDoS protection.
• Apply zero-trust network principles.

⸻

🔑 4. Secure Remote Access
• Use SSH key-based authentication (disable password login).
• Enforce VPN for admin access.
• Log & monitor all remote access sessions.
• Disable legacy protocols (Telnet, FTP, SMBv1).
• Require bastion/jump host for critical access.

⸻

📊 5. Logging & Monitoring
• Enable centralized logging (syslog / SIEM).
• Track failed login attempts & anomalies.
• Configure alerts for privilege escalation or config changes.
• Monitor log tampering.
• Retain logs securely for audits & forensics.

⸻

🔒 6. Data Protection
• Encrypt data at rest (LUKS, BitLocker, etc.).
• Encrypt data in transit (TLS 1.2+).
• Strict database access policies.
• Regular, offline, immutable backups.
• Test restore procedures (don’t assume backups work).

⸻

🔁 7. Application & Patch Management
• Keep middleware, frameworks, and apps patched.
• Delete default credentials & sample files.
• Enable code signing for software packages.
• Use secure coding practices (OWASP Top 10).
• Implement dependency scanning (Snyk, Trivy, etc.).

⸻

🛡️ 8. Malware & Intrusion Defense
• Deploy EDR/AV on endpoints.
• Enable IDS/IPS at network edge.
• Automatic vulnerability scans (schedule weekly/monthly).
• Monitor persistence techniques (cron, startup scripts).
• Block known malicious IP ranges & TLDs.

⸻

🏢 9. Physical & Cloud Security
• Restrict physical access to server racks/rooms.
• Enable provider security tools (AWS Security Groups, Azure NSG, IAM).
• Harden cloud images (CIS benchmarks).
• Review cloud logging & audit trails regularly.
• Disable unused cloud API keys / roles.

⸻

📜 10. Policy & Compliance
• Use CIS / NIST / ISO-27001 benchmarks.
• Track & document every access change.
• Force annual access reviews & key rotation.
• Perform regular security training for admins.
• Maintain disaster recovery & incident plans.

⸻

➕ Additional 5 Critical Controls (Advanced Hardening)

🧠 11. Privileged Access Management (PAM)
• Use jump hosts & session recording.
• Just-In-Time access for admins.
• Store keys in secure vaults (HashiCorp Vault, CyberArk).

🚨 12. Real-Time Threat Detection
• Use behavioral analytics → UEBA/XDR.
• AI-based anomaly detection recommended.
• Block suspicious IPs automatically.

🧪 13. Red Team & Pentesting
• Run regular internal pentests.
• Validate configuration weaknesses.
• Simulate phishing + lateral movement scenarios.

🧱 14. Container / VM Isolation
• Use AppArmor, SELinux, Seccomp profiles.
• Limit Docker socket access & root containers.
• Scan images before deployment.

📦 15. Automated Configuration Management
• Use IaC (Terraform, Ansible, Puppet) for repeatable and secure builds.
• Detect drift using compliance scanning.
• Version control all infrastructure.

⸻

🧠 Core Reminder

A server is only as secure as the team who maintains it.
Hardening isn’t one task — it’s an ongoing

#ServerSecurity #SystemHardening #InfoSec #CyberSecurity #BlueTeam
#DevSecOps #SysAdmin #ThreatDetection #AccessControl #NetworkSecurity
#LinuxSecurity #SecureArchitecture #RiskMitigation #SecurityChecklist
#CloudSecurity #InfrastructureSecurity #ZeroTrust #SecurityMonitoring

Server Security Checklist — Essential Hardening Guide

Securing your servers isn’t optional — it’s your first line of defense against data breaches, ransomware, insider threats, and lateral movement. Use this checklist as a baseline for Linux, Windows, cloud, hybrid, or on-prem servers.

⸻

🔧 1. System & OS Hardening
• Keep OS & packages updated (apply security patches frequently).
• Remove / disable unused services & software.
• Enforce secure boot + BIOS/UEFI passwords.
• Disable auto-login and guest accounts.
• Use minimal OS images only (reduce attack surface).

⸻

🔐 2. Access Control
• Enforce strong passwords & MFA everywhere.
• Use RBAC & least privilege access.
• Disable root/Administrator login over SSH/RDP.
• Rotate credentials & keys regularly.
• Implement just-in-time access for privileged users.

⸻

🌐 3. Network Security
• Restrict inbound/outbound traffic via firewalls.
• Segment critical servers from general LANs/VLANs.
• Disable unused ports & protocols.
• Enable DoS/DDoS protection.
• Apply zero-trust network principles.

⸻

🔑 4. Secure Remote Access
• Use SSH key-based authentication (disable password login).
• Enforce VPN for admin access.
• Log & monitor all remote access sessions.
• Disable legacy protocols (Telnet, FTP, SMBv1).
• Require bastion/jump host for critical access.

⸻

📊 5. Logging & Monitoring
• Enable centralized logging (syslog / SIEM).
• Track failed login attempts & anomalies.
• Configure alerts for privilege escalation or config changes.
• Monitor log tampering.
• Retain logs securely for audits & forensics.

⸻

🔒 6. Data Protection
• Encrypt data at rest (LUKS, BitLocker, etc.).
• Encrypt data in transit (TLS 1.2+).
• Strict database access policies.
• Regular, offline, immutable backups.
• Test restore procedures (don’t assume backups work).

⸻

🔁 7. Application & Patch Management
• Keep middleware, frameworks, and apps patched.
• Delete default credentials & sample files.
• Enable code signing for software packages.
• Use secure coding practices (OWASP Top 10).
• Implement dependency scanning (Snyk, Trivy, etc.).

⸻

🛡️ 8. Malware & Intrusion Defense
• Deploy EDR/AV on endpoints.
• Enable IDS/IPS at network edge.
• Automatic vulnerability scans (schedule weekly/monthly).
• Monitor persistence techniques (cron, startup scripts).
• Block known malicious IP ranges & TLDs.

⸻

🏢 9. Physical & Cloud Security
• Restrict physical access to server racks/rooms.
• Enable provider security tools (AWS Security Groups, Azure NSG, IAM).
• Harden cloud images (CIS benchmarks).
• Review cloud logging & audit trails regularly.
• Disable unused cloud API keys / roles.

⸻

📜 10. Policy & Compliance
• Use CIS / NIST / ISO-27001 benchmarks.
• Track & document every access change.
• Force annual access reviews & key rotation.
• Perform regular security training for admins.
• Maintain disaster recovery & incident plans.

⸻

➕ Additional 5 Critical Controls (Advanced Hardening)

🧠 11. Privileged Access Management (PAM)
• Use jump hosts & session recording.
• Just-In-Time access for admins.
• Store keys in secure vaults (HashiCorp Vault, CyberArk).

🚨 12. Real-Time Threat Detection
• Use behavioral analytics → UEBA/XDR.
• AI-based anomaly detection recommended.
• Block suspicious IPs automatically.

🧪 13. Red Team & Pentesting
• Run regular internal pentests.
• Validate configuration weaknesses.
• Simulate phishing + lateral movement scenarios.

🧱 14. Container / VM Isolation
• Use AppArmor, SELinux, Seccomp profiles.
• Limit Docker socket access & root containers.
• Scan images before deployment.

📦 15. Automated Configuration Management
• Use IaC (Terraform, Ansible, Puppet) for repeatable and secure builds.
• Detect drift using compliance scanning.
• Version control all infrastructure.

⸻

🧠 Core Reminder

A server is only as secure as the team who maintains it.
Hardening isn’t one task — it’s an ongoing

#ServerSecurity #SystemHardening #InfoSec #CyberSecurity #BlueTeam
#DevSecOps #SysAdmin #ThreatDetection #AccessControl #NetworkSecurity
#LinuxSecurity #SecureArchitecture #RiskMitigation #SecurityChecklist
#CloudSecurity #InfrastructureSecurity #ZeroTrust #SecurityMonitoring

20,000 failed SSH logins in 2 days.
On a server hosting only a static webpage.

Recently, I was checking logs on a VM that I own. It has no backend, no database.
Just a static webpage served by NGINX.

Yet, I found 20k failed SSH login attempts.

A VM becomes a target the moment it’s online.

Fortunately, password logins were disabled. Here is my new server security routine (non-root user, SSH auth, fail2ban etc.):

https://nerdsid.com/posts/cyber-security/10-steps-to-make-a-new-linux-vm-safe/

#CyberSecurity #InfoSec #Linux #ServerSecurity

🐦🥱 Ah yes, because nothing says cutting-edge anthropology like a 400 Bad Request error. Clearly, ancient Patagonian server security was way ahead of its time, blocking all access to any meaningful information. If only their hunter-gatherers had a helpline for their own glitches. 🙄
https://phys.org/news/2025-10-ancient-patagonian-hunter-disabled.html #cuttingedgeanthropology #ancientPatagonia #serversecurity #techhumor #huntergatherers #HackerNews #ngated

📋 Server Security Checklist — Essential Hardening Guide 🛡️

Securing servers is critical to protect sensitive data, applications, and networks. Here’s a quick checklist every sysadmin and security engineer should follow to reduce risk and strengthen resilience. ⚡🔐

1️⃣ System & OS Hardening
🔹 Keep OS and packages updated (apply patches regularly).
🔹 Remove or disable unused services & software.
🔹 Configure secure boot and BIOS/UEFI passwords.

2️⃣ Access Control
🔹 Enforce strong passwords + MFA for all accounts.
🔹 Use role-based access (least privilege).
🔹 Disable root/administrator login over SSH/RDP.

3️⃣ Network Security
🔹 Restrict inbound/outbound traffic with firewalls.
🔹 Segment critical servers from general networks.
🔹 Disable unused ports & protocols.

4️⃣ Secure Remote Access
🔹 Use SSH with key-based auth (disable password logins).
🔹 Enforce VPNs for admin access.
🔹 Monitor and log remote sessions.

5️⃣ Logging & Monitoring
🔹 Enable centralized logging (syslog/SIEM).
🔹 Monitor failed login attempts & unusual activity.
🔹 Configure alerts for critical events.

6️⃣ Data Protection
🔹 Encrypt sensitive data at rest & in transit (TLS, disk encryption).
🔹 Regularly back up data to secure, offline storage.
🔹 Apply strict database access policies.

7️⃣ Application & Patch Management
🔹 Keep middleware, frameworks, and apps patched.
🔹 Remove default credentials and sample configs.
🔹 Use secure coding practices.

8️⃣ Malware & Intrusion Defense
🔹 Deploy antivirus/EDR for endpoints.
🔹 Enable IDS/IPS at the network edge.
🔹 Scan regularly for vulnerabilities.

9️⃣ Physical & Cloud Security
🔹 Restrict physical access to server rooms.
🔹 Harden cloud instances with provider tools (security groups, IAM).
🔹 Regularly review cloud audit logs.

🔟 Policy & Compliance
🔹 Apply CIS/NIST benchmarks.
🔹 Document access, configs, and changes.
🔹 Train admins in security best practices.

#ServerSecurity #CyberSecurity #InfoSec #BlueTeam #SysAdmin #ITSecurity #SecurityChecklist #DefensiveSecurity

🔧 You may not notice, but to improve server security, we’ve decided to disable IPv6. Since our provider, OVHCloud, doesn’t offer DDoS protection or edge firewall for IPv6, we made this decision to ensure a better and more stable service.

#ServerSecurity #IPv6 #OVHCloud #NetworkSafety #CyberSecurity

Heads up for any server admins (especially cPanel ones):

Way To The Web Ltd (aka ConfigServer) who provide the very useful and handy ConfigServer Firewall (csf) and many other products are closing down at the end of August - no updates/downloads will be available from that date.

https://configserver.com/announcement/

#serveradmin #cpanel #serversecurity #csf #linux

🌴🔍 "Groundbreaking" findings about #Rapa Nui's "isolation" were so earth-shattering that even the internet refused to serve them. 🤦‍♂️ Who knew radiocarbon dating had such hard limits... like server security policies? 🚫💻
https://phys.org/news/2025-06-radiocarbon-dating-reveals-rapa-nui.html #Groundbreaking #Nui #RadiocarbonDating #ServerSecurity #InternetIsolation #HackerNews #ngated

Automating UFW Configuration with Ansible: Locking Down the Digital Fortress #Ansible #UFW #Firewall #Automation #Cybersecurity #ServerSecurity #DeadSwitch #OperationalSecurity #AnsiblePlaybook #NetworkSecurity #AutomationTools #AnsibleRoles #SystemAdministration #SecureServer #Encryption #AnsibleVault #PrivacyTools #SecurityAutomation

http://tomsitcafe.com/2025/04/16/automating-ufw-configuration-with-ansible-locking-down-the-digital-fortress/

👨‍🔬🔍 Apparently, the secret to protein folding was hiding in the 400 Bad Request error all along! Who knew server security policies were the key to solving scientific mysteries? 🧪🔒
https://phys.org/news/2025-03-protein-mystery-core-fractions.html #proteinfolding #serversecurity #scientificbreakthrough #400BadRequest #technologynews #HackerNews #ngated

Does anyone have any handy guides for properly locking down a linux server used for hosting? I've been doing an okay job with mine but I think if anyone has a good guide about how to make sure I didn't miss anything, that would be nice!

It's primarily for web hosting, including fedi, and sometimes as a fallback matrix/chat thing. Boosts appreciated!

#linuxSecurity #linuxHelp #serverHosting #serverSecurity

Securing SSH access is critical for protecting your server from unauthorized access. By combining Two-Factor Authentication (2FA) with IPv6-only connections, you add multiple layers of security.

https://linuxexpert.org/enhancing-server-security-with-2fa-and-ipv6-only-ssh-access/

#2FA #TwoFactorAuthentication #SSH #IPv6 #ServerSecurity #SSHKeyAuthentication #OTP #GoogleAuthenticator #PAM #Firewall #Iptables #UFW #Linux #ServerAdministration #Cybersecurity #NetworkSecurity #IPv6Only #SSHConfiguration #EnhancedSecurity #ServerProtection #linux

RHEL 9 OpenSSH packages affected by remote code execution flaw

https://stackdiary.com/rhel-9-openssh-packages-affected-by-remote-code-execution-flaw/

#OpenSSH #Vulnerability #RHEL9 #Security #CyberSecurity #CVE20246409 #RemoteCodeExecution #Linux #Fedora #RaceCondition #SIGALRM #Exploit #PatchManagement #Mitigation #Infosec #Threat #Hackers #Bug #Malware #Glitch #Audit #Syslog #Update #Enterprise #LinuxSecurity #NetworkSecurity #ServerSecurity #CyberThreat #SystemAdmin #TechNews #CVE #Mitre #NIST #OpenSource #DevOps #regreSSHion

🏆Protect your Linux system with the top 7 firewalls of 2024! Dive into our detailed guide and, for all your server needs, choose xTom’s top-tier colocation, dedicated servers, and NVMe KVM VPS hosting! #TechTips #CloudHosting #ServerSecurity https://xt.om/DAsd

"🚨 Critical Security Alert: HikCentral Professional Vulnerabilities Exposed 🚨"

Hikvision's latest advisory reveals severe vulnerabilities in HikCentral Professional, identified by Michael Dubell and Abdulazeez Omar. CVE-2024-25063 and CVE-2024-25064, with CVSS scores of 7.5 and 4.3 respectively, highlight risks of unauthorized access due to insufficient server-side validation. Users are urged to upgrade to versions above V2.5.1 for enhanced security. Stay vigilant and prioritize updating to safeguard your systems! 🛡️💻🔐

CVE Summaries:

• CVE-2024-25063: Attackers could exploit server validation flaws to access restricted URLs, compromising confidentiality.
• CVE-2024-25064: Authenticated users could manipulate parameters to access unauthorized resources, posing a lower risk.

Source: Hikvision Security Advisory

Tags: #CyberSecurity #Hikvision #Vulnerability #CVE2024-25063 #CVE2024-25064 #ServerSecurity #InfoSec #PatchManagement 🌍🔒💡

Stretchoid.com is a plague for all server operators. Especially for mail server operators. Recently I have entries like this in my web server logs:

"MGLNDD_[IP-Adress_of_your_server] "-" "-"

Do yourself a favor and block stretchoid in your firewalls. A relatively current list that I use on my servers.

45.55.0.0/24
104.131.128.0/24
104.131.144.0/24
104.236.128.0/24
107.170.192.0/24
107.170.208.0/24
107.170.224.0/24
107.170.225.0/24
107.170.226.0/24
107.170.227.0/24
107.170.228.0/24
107.170.229.0/24
107.170.230.0/24
107.170.231.0/24
107.170.232.0/24
107.170.233.0/24
107.170.234.0/24
107.170.235.0/24
107.170.236.0/24
107.170.237.0/24
107.170.238.0/24
107.170.239.0/24
107.170.240.0/24
107.170.241.0/24
107.170.242.0/24
107.170.243.0/24
107.170.244.0/24
107.170.245.0/24
107.170.246.0/24
107.170.247.0/24
107.170.248.0/24
107.170.249.0/24
107.170.250.0/24
107.170.251.0/24
107.170.252.0/24
107.170.253.0/24
107.170.254.0/24
107.170.255.0/24
137.184.255.0/24
138.68.208.0/24
159.203.192.0/24
159.203.208.0/24
159.203.224.0/24
159.203.240.0/24
162.243.128.0/24
162.243.129.0/24
162.243.130.0/24
162.243.131.0/24
162.243.132.0/24
162.243.133.0/24
162.243.134.0/24
162.243.135.0/24
162.243.136.0/24
162.243.137.0/24
162.243.138.0/24
162.243.139.0/24
162.243.140.0/24
162.243.141.0/24
162.243.142.0/24
162.243.143.0/24
162.243.144.0/24
162.243.145.0/24
162.243.146.0/24
162.243.147.0/24
162.243.148.0/24
162.243.149.0/24
162.243.150.0/24
162.243.151.0/24
162.243.152.0/24
192.241.192.0/24
192.241.193.0/24
192.241.194.0/24
192.241.195.0/24
192.241.196.0/24
192.241.197.0/24
192.241.198.0/24
192.241.199.0/24
192.241.200.0/24
192.241.201.0/24
192.241.202.0/24
192.241.203.0/24
192.241.204.0/24
192.241.205.0/24
192.241.206.0/24
192.241.207.0/24
192.241.208.0/24
192.241.209.0/24
192.241.210.0/24
192.241.211.0/24
192.241.212.0/24
192.241.213.0/24
192.241.214.0/24
192.241.215.0/24
192.241.216.0/24
192.241.217.0/24
192.241.218.0/24
192.241.219.0/24
192.241.220.0/24
192.241.221.0/24
192.241.222.0/24
192.241.223.0/24
192.241.224.0/24
192.241.225.0/24
192.241.226.0/24
192.241.227.0/24
192.241.228.0/24
192.241.229.0/24
192.241.230.0/24
192.241.231.0/24
192.241.232.0/24
192.241.233.0/24
192.241.234.0/24
192.241.235.0/24
192.241.236.0/24
192.241.237.0/24
192.241.238.0/24
192.241.239.0/24
198.199.92.0/24
198.199.93.0/24
198.199.94.0/24
198.199.95.0/24
198.199.96.0/24
198.199.97.0/24
198.199.98.0/24
198.199.100.0/24
198.199.101.0/24
198.199.102.0/24
198.199.103.0/24
198.199.104.0/24
198.199.105.0/24
198.199.106.0/24
198.199.107.0/24
198.199.108.0/24
198.199.109.0/24
198.199.110.0/24
198.199.111.0/24
198.199.112.0/24
198.199.113.0/24
198.199.114.0/24
198.199.115.0/24
198.199.116.0/24
198.199.117.0/24
198.199.118.0/24
198.199.119.0/24

#server #stretchoid #admin #linux #windows #unix #sysadmin #firewall #webserver #mailserver #postfix #apache #nginx #it #blocklist #administrator #web #serversecurity

🚨✨ Critical Alert: SSH ProxyCommand Vulnerability! Dive into the details of CVE-2023-51385, a severe code execution flaw, exposing servers to shell injection. Discover insights, mitigation strategies, and stay ahead of potential threats. 🔐💻

https://www.relianoid.com/blog/ssh-proxycommand-unexpected-code-execution-cve-2023-51385/

#SSHSecurity #CyberRisk #CodeExecutionFlaw #InfoSec #VulnerabilityAlert #SSHProxyCommand #CyberThreats #MitigationStrategies #TechSecurity #CVE2023_51385 #CyberDefense #SSHVulnerability #InfoSecInsights #ServerSecurity #PatchNow

🔐Secure #Communication! 🔐

Dive into our article to discover the #evolution of TLS protocols, why checking your server's TLS versions is crucial for data security, and how to perform tests using Nmap's powerful "ssl-enum-ciphers" script.
https://www.relianoid.com/resources/knowledge-base/troubleshooting/testing-ssl-tls-protocols-and-ciphers-for-secured-services/

#TLSProtocols #DataSecurity #NetworkSecurity #Nmap #SSLTesting #InfoSec #ServerSecurity #TechSecurity #Encryption #OnlinePrivacy #CyberAwareness #SecurityAudit #TechCompliance #SecureServices #OnlineSafety #DigitalSecurity

We always try to make your work #lighter and #help you with your issues and doubts. Do you want to know what is HTTP/2 Reset Attack and how to mitigate it?
https://www.relianoid.com/resources/knowledge-base/howtos/what-is-and-how-to-mitigate-http-2-reset-attack-using-relianoid-load-balancer/
#HTTP2ResetAttack #RST_STREAMAttack #CyberSecurity #WebSecurity #HTTP2Protocol #CyberThreats #DoSAttack #HTTP2Vulnerabilities #ServerSecurity #MitigationStrategies #HTTP2Implementation #LoadBalancerSecurity #RELIANOIDLoadBalancer #SecurityMeasures #RateLimiting #WebCommunication #HTTP2Streams #ServerProtection

"⚠️ Critical RCE Alert: 3,000 Apache ActiveMQ Servers at Risk! ⚠️"

Over 3,000 Apache ActiveMQ servers are exposed online, vulnerable to a critical RCE flaw (CVE-2023-46604, CVSS v3: 10.0). Immediate patching is urged to prevent potential data theft and network compromise. Stay vigilant! 🛡️💻

Apache ActiveMQ is an open-source message broker for secure communication between clients and servers, supporting Java and various cross-language clients and protocols like AMQP, MQTT, OpenWire, and STOMP.

The flaw in question is CVE-2023-46604, a critical severity (CVSS v3 score: 10.0) RCE that allows attackers to execute arbitrary shell commands by exploiting class types in the OpenWire protocol.

According to Apache's disclosure on October 27, 2023, this vulnerability affects the following Apache ActiveMQ and Legacy OpenWire Module versions:

• Versions before 5.18.3 in the 5.18.x series
• Versions before 5.17.6 in the 5.17.x series
• Versions before 5.16.7 in the 5.16.x series
• All versions before 5.15.16

To address this issue, fixes have been released in versions 5.15.16, 5.16.7, 5.17.6, and 5.18.3. It's recommended to upgrade to one of these versions to enhance your IT security.

Tags: #CyberSecurity #RCE #ApacheActiveMQ #Vulnerability #PatchNow #InfoSec #ServerSecurity #CVE202346604 🚨🔐

Source: BleepingComputer

Author: Bill Toulas

"🚨 Openfire Vulnerability Under Active Exploit: A Gateway to Ransomware and Cryptominers 🚨"

The widely-used Openfire chat server is under siege as hackers exploit a high-severity flaw, CVE-2023-32315, to deploy ransomware and cryptominers. This Java-based open-source XMPP server, boasting 9 million downloads, has become a lucrative target due to an authentication bypass vulnerability in its admin console. Attackers are creating new admin accounts on vulnerable servers, installing malicious Java plugins, and executing commands via HTTP requests. 🛑

The flaw spans across various Openfire versions dating back to 2015. Although patches were released in May 2023, over 3,000 servers remained vulnerable by mid-August 2023. The first known exploitation dates back to June 2023, when a server was ransomed post-exploitation. Attack scenarios include deploying crypto-mining trojans, installing backdoors, and extracting server information. 🕵️

Dr. Web has identified four distinct attack scenarios leveraging this flaw, emphasizing the urgency of applying available security updates. BleepingComputer also reports multiple instances of Openfire servers being encrypted with ransomware, appending a .locked1 extension to files. The ransom demands range from 0.09 to 0.12 bitcoins ($2,300 to $3,500). 🖥️🔓

The threat landscape is evolving, with threat actors not solely targeting Openfire servers but any vulnerable web server. It's a stark reminder for organizations to stay vigilant and ensure their systems are up-to-date with the latest security patches. 🛡️

Source: BleepingComputer by Bill Toulas

Tags: #Openfire #Ransomware #Cryptominers #CyberSecurity #Vulnerability #CVE202332315 #ThreatIntel #InfoSec #PatchManagement #ServerSecurity #DrWeb #BleepingComputer 🌐🔐

MITRE CVE-2023-32315

Unraveling the TootRoot Bug: A Deep Dive into the Critical Vulnerability Impacting Mastodon Servers https://privacypriority.in/2023/07/unraveling-the-tootroot-bug-a-deep-dive-into-the-critical-vulnerability-impacting-mastodon-servers/ #Mastodon, #TootRootBug, #CyberSecurity, #OpenSource, #DecentralizedSocialMedia, #DataPrivacy, #CVE202336460, #CVE202336459, #ServerSecurity #Cybersecurity #News

Anda a procura de um servidor dedicado?
Tudo o que precisa para ter sucesso online.
#servidoresdedicados #linux #hosting #servidores #windows #servidoresvirtuais #firewall #sistemas #sistemasweb #serversecurity #linuxhosting #linuxservers #linuxportugal #informaticaportugal #hostingweb #vpshosting #cloudvps

#ActuLibre Let's Encrypt Revoking 3 Million TLS Certificates Issued Incorrectly Due to a Bug -> http://feedproxy.google.com/~r/TheHackersNews/~3/RChl-RdG7pU/lets-encrypt-certificate-revocation.html #FreeSSLTLSCertificate #CertificateAuthority #websitesecurity #serversecurity #SSLCertificate #cybersecurity #LetsEncrypt #TSLServer

#ActuLibre 250 Million Microsoft Customer Support Records Exposed Online -> http://feedproxy.google.com/~r/TheHackersNews/~3/N1EEgfoppIc/microsoft-customer-support.html #TechSupportScams #serversecurity #cybersecurity #databreach #dataleaked #Microsoft