new23d
Rules can be per Security Group, too, for fine-grained access control. I would also strongly recommend that installation of dependencies is a build-time task, not a run-time task, and if those two stages are separated, it makes egress filtering a whole lot more effective since the build-time allowlists are often multi-tenant CDNs where a threat actor can host their own data capturing or malicious payload delivering service.
The Curious Incidents with DNS in the Sandbox at Escape-Time
What data do coding agents send, and where to?
Obfuscating outbound traffic via a Suricata "firewall"
Living-off-the-land Dynamic DNS for Route 53
• Google's CRLs from the same intermediate CA (same public key) have different URLs and different content when pulled from different hosts (google.com, youtube.com).
• DigiCert has sharded according to 'assurance' class, algorithm, year and acquisition's name.
• Sectigo also has sharded according to 'assurance' class [1].
• GlobalSign has sharded by the yearly quarter presumably.
• HTTP Cache-Control maxage (or s-maxage), 'Expires' and 'Next Update' within the CRL file are not in sync.
• Some CAs other than Let's Encrypt also do not publish CRL URLs in the leaf certificates.
[1] https://www.sectigo.com/knowledge-base/detail/Sectigo-Interm...
Data is on CRL availability, number of entries, expiry & refresh times, etc. from various x509 leaf server SSL certificates.
[1] https://news.ycombinator.com/item?id=41058138 [2] https://news.ycombinator.com/item?id=41046956
An analysis of CRL sizes from various CAs
Data is on CRL availability, number of entries, expiry & refresh times, etc. from various x509 leaf server SSL certificates.
It can be disabled if an organisation wishes to. I wrote about how to do this in Chrome [2,3], and will write about Firefox when I get a chance.
[1] https://datatracker.ietf.org/doc/draft-ietf-tls-esni/ [2] https://chasersystems.com/blog/disabling-encrypted-clienthel... [3] https://news.ycombinator.com/item?id=37823262
https://forensicssource.com/collections/evidence-markers/pro...
[1] https://www.youtube.com/watch?v=DKSa32qWiRw [2] https://fwdcloudsec.org/ [3] https://canglad.com/blog/2023/aws-network-firewall-egress-fi...
At time ~02:27, a dip in the altitude can be seen in the flight data chart.
[1] https://chasersystems.com/blog/disabling-encrypted-clienthel... [2] https://chasersystems.com/discriminat/comparison/aws-network...
*for many websites, the domain name visibility during an HTTPS handshake will no longer be available to firewalls/proxies (unless they were terminating.)