North American Network Operators Group
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Re: Alternate and/or hidden infrastructure addresses (BGP/TCP RST/SYNvulnerability)

  • From: Pekka Savola
  • Date: Fri Apr 23 04:09:27 2004 
On Thu, 22 Apr 2004, Patrick W.Gilmore wrote:
> Hrmmm, would the GTSM work with loopback peering?  ISTR it allowed a 
> TTL of 254, which should make it to the loopback interface.

Only flawed implementations have to use TTL of 254 when you have a 
session between two adjacent loopbacks.  But I think those still 
exist...

(TTL should only be decremented when _forwarding_, and I don't think
you could argue that you need to _forward_ a packet from your ingress
interface to your _loopback_ interface..)

-- 
Pekka Savola                 "You each name yourselves king, yet the
Netcore Oy                    kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings