[e2e] Receiving RST on a MD5 TCP connection.

Joe Touch touch at ISI.EDU
Fri Jul 1 09:29:43 PDT 2005



Mitesh Dalal wrote:
...
>>Another point along these lines - if you had a secure connection with
>>another host, then the host reboots and 'forgets' the security
>>altogether (i.e., doesn't reestablish keys), it shouldn't be able to
>>reset the old connection anyway.
> 
> and why would that be Joe ? By saying so you have no love for network
> reliability. Do you know networks can go down if MD5 enabled LDP
> connection cannot recover from this problem and rely on timeouts
> to recover ? Do you know the same thing can happen to BGP ?
> Security shouldnt come at the cost of reliablity!

New keys should - as I noted later in my post - flush state associated
with old keys. Lacking new keys, old state does no harm, since new
connections shouldn't occur.

Recovering from a problem doesn't mean leaving your doors unlocked.

Joe
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