Firewall Wizards mailing list archives
Re: Interesting infographic on the history of firewalls
From: "Marcus J. Ranum" <mjr () ranum com>
Date: Sat, 26 Jul 2014 12:39:12 -0400
Claudio Telmon wrote:
The fist firewall evasion techniques I'm aware of are: - SYN packet fragmentation in order to fool packet filtering routers/firewalls
When I was at TIS, in 199?2, I set up Onions' tunnel driver and a couple shell scripts that uuencoded the packets coming out of the tunnel, and emailed them to another system user with a .forward file that uudecoded the packets and injected them into a peer tunnel. With that setup, and its opposite on both machines, I was able to NFS mount filesystems across a secure mail guard. (Hint: if you're doing your own version of this, jigger the RPC retransmit timer in the NFS mount options, or you'll get packet storms that turn into email storms) mjr. -- Marcus J. Ranum, CSO, Tenable Network Security, inc. http://www.tenable.com _______________________________________________ firewall-wizards mailing list firewall-wizards () listserv icsalabs com https://listserv.icsalabs.com/mailman/listinfo/firewall-wizards
Current thread:
- Re: Interesting infographic on the history of firewalls Marcus J. Ranum (Jul 31)
- <Possible follow-ups>
- Re: Interesting infographic on the history of firewalls Marcus J. Ranum (Jul 31)
- Re: Interesting infographic on the history of firewalls Darden, Patrick (Aug 04)