funsec mailing list archives
Re: An interesting packet inspection problem
From: Valdis.Kletnieks () vt edu
Date: Sat, 14 Jan 2006 22:07:23 -0500
On Sat, 14 Jan 2006 21:50:49 GMT, Drsolly said:
But the x's are hexadecimal bc, six of them, and that's the "active ingredient".
Many moons ago, a software package called VMNET kept crashing the FDDI ring at the JVNC, near Princeton University. Basically, VMNET was layering IBM's NJE protocol used by Bitnet over TCP/IP - and the format of an NJE SIGNON packet to start a link up, when stuffed into the FDDI format (which on the wire was some NRZI or some such thing), resulted in a too-long run of zero bits (basically, no laser for a long time), causing the other end to lose timing sync due to clock drift. It would be interesting if you tried *other* protocols (for instance, an ICMP Echo Request) with the problem 6 bytes as a payload. If that fails as well, that would tend to strengthen the idea that it's a data-dependent hardware issue....
Attachment:
_bin
Description:
_______________________________________________ Fun and Misc security discussion for OT posts. https://linuxbox.org/cgi-bin/mailman/listinfo/funsec Note: funsec is a public and open mailing list.
Current thread:
- An interesting packet inspection problem Drsolly (Jan 14)
- Re: An interesting packet inspection problem H D Moore (Jan 14)
- Re: An interesting packet inspection problem Gadi Evron (Jan 14)
- Re: An interesting packet inspection problem Drsolly (Jan 14)
- Re: An interesting packet inspection problem Gadi Evron (Jan 14)
- Re: An interesting packet inspection problem Valdis . Kletnieks (Jan 14)
- Re: An interesting packet inspection problem Jeff Kell (Jan 14)
- RE: [AKO Content Warning - Attachments] An interesting packet inspection problem Stephen Villano (Jan 15)
- Re: An interesting packet inspection problem Drsolly (Jan 15)
- Re: An interesting packet inspection problem Gadi Evron (Jan 15)
- Re: An interesting packet inspection problem Valdis . Kletnieks (Jan 15)
- Re: An interesting packet inspection problem Drsolly (Jan 15)
- RE: An interesting packet inspection problem Stephen Villano (Jan 16)
- RE: An interesting packet inspection problem Stephen Villano (Jan 16)
- Re: An interesting packet inspection problem H D Moore (Jan 14)
- Re: An interesting packet inspection problem Drsolly (Jan 16)
- RE: An interesting packet inspection problem Stephen Villano (Jan 16)