#asns — Public Fediverse posts

#sysadmin #php #wordpress #cloudflare #ASNs #Security #defensive #notes #blueteam https://blog.odicforcesounds.com/twoDaysAfter.html

Today a /16 network (65536 IP addresses) is a VERY valuable asset worth around $3m💰! Here we have seven of them announced on the Internet by unallocated ASNs - it is almost unbelievable: 😱

144.74.0.0/16 AS25978 [rush.edu, US]
146.131.0.0/16 AS23448 [epcor.com, CA]
152.5.0.0/16 AS11540 [rti.org, US]
159.113.0.0/16 AS16860 [wipro.com, IN ... even the IPs are unallocated!]
162.121.0.0/16 AS19708 [stlukeshealth.org, US]
179.18.0.0/16 AS22698 [wom.co, CO]
197.12.0.0/16 AS37703 [atlax.com, TN]

Using unallocated ASNs is a common cybercriminals trick. To prevent network reputation degradation, @arin @Rush University Medical Center @epcor @RTI International @wipro @ST. Luke's Health System @WOM Colombia @Atlax Web Solutions @lacnic @afrinic we strongly recommend fixing this 🙏!

#ASNs #NetworkReputation #Cybercrime

It was a fantastic week in #SanServolo. The future of neuroscience lies with these young folks! #AdvancedSchoolOfNeuroscience #ASNS #IIT #IntegratedInformationTheory

Example of #Blocking #ASNs (https://en.wikipedia.org/wiki/Autonomous_system_(Internet)) with #opnsense:

Head to the #Firewall section

1. Create a new alias

Name: "ASN_Google_IPv4"
Type: "BGP ASN"
Content: The plain ASN number 15169 (#Google)
Give a description

2. Create a floating rule

Rule category: Floating
Action: Block
Interface: LAN/WAN
Direction: Any
TCP Version: IPv4
Protocol: any
Destination: ASN_Google_IPv4
Logging as desired

Lookup ASNs:
https://securitytrails.com/blog/asn-lookup

#opensource #asn #block #privacy #network #privacy

Are there any #freedomRespecting #whois servers/databases?

The https://whois.radb.net one is good but it seems to not feature #AsiaPacific ASNs for some strange reason.

In a global community, we need those too.

#whois #whoisFoss #whoisFreedom #freeToKnow #freeKnowledge #sciHub #whoisServer #whoisDatabase #ASNumbers #ASN #ASNs #RadB