nanog mailing list archives
Re: TCP/BGP vulnerability - easier than you think
From: Crist Clark <crist.clark () globalstar com>
Date: Thu, 22 Apr 2004 10:01:17 -0700
David Luyer wrote: [snip]
With ipsec, you have crypto overhead before you have any opportunity to do the basic sanity check.
Minor point, but with IPsec, the 32-bit SPI and the 32-bit replay counter are very low cost ways to drop the majority of traffic from a flood of random junk with no crypto calculations. You actually have more bits with AH or ESP than with TCP. The 32-bit SPI must be an exact match like the two 16-bit port fields, and you have 32-bits of sequence number in both, but the TCP window is much larger than the IPsec window (usually 6-bit by default) leaving you more bits to check. -- Crist J. Clark crist.clark () globalstar com Globalstar Communications (408) 933-4387
Current thread:
- Re: TCP/BGP vulnerability - easier than you think, (continued)
- Re: TCP/BGP vulnerability - easier than you think Daniel Roesen (Apr 21)
- Re: TCP/BGP vulnerability - easier than you think Iljitsch van Beijnum (Apr 21)
- Re: TCP/BGP vulnerability - easier than you think Daniel Roesen (Apr 21)
- Re: TCP/BGP vulnerability - easier than you think Iljitsch van Beijnum (Apr 21)
- Re: TCP/BGP vulnerability - easier than you think Daniel Roesen (Apr 21)
- Re: TCP/BGP vulnerability - easier than you think Iljitsch van Beijnum (Apr 21)
- Re: TCP/BGP vulnerability - easier than you think Paul Jakma (Apr 21)
- Re: TCP/BGP vulnerability - easier than you think Iljitsch van Beijnum (Apr 21)
- Re: TCP/BGP vulnerability - easier than you think Paul Jakma (Apr 21)
- RE: TCP/BGP vulnerability - easier than you think David Luyer (Apr 21)
- Re: TCP/BGP vulnerability - easier than you think Crist Clark (Apr 22)
- Re: TCP/BGP vulnerability - easier than you think John Kristoff (Apr 21)
- Re: TCP/BGP vulnerability - easier than you think E.B. Dreger (Apr 21)
- Re: TCP/BGP vulnerability - easier than you think Iljitsch van Beijnum (Apr 22)
- Re: TCP/BGP vulnerability - easier than you think Paul Jakma (Apr 23)
- Re: TCP/BGP vulnerability - easier than you think E.B. Dreger (Apr 21)
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- Re: TCP/BGP vulnerability - easier than you think Iljitsch van Beijnum (Apr 23)
- Message not available
- Re: TCP/BGP vulnerability - easier than you think Iljitsch van Beijnum (Apr 23)
- Re: TCP/BGP vulnerability - easier than you think Leo Bicknell (Apr 23)
- Re: TCP/BGP vulnerability - easier than you think Petri Helenius (Apr 23)
- Re: TCP/BGP vulnerability - easier than you think Todd Vierling (Apr 23)