Re: SSH and Client Lease Time?

Darren Dunham wrote:

Ron Hardin <rhhardin@xxxxxxxxxxxxxx> wrote:
Apparently, a router client lease time expiring disrupts a SSH connection.
True or false?

Well if it actually *expires*, then I'd imagine that means that the
lease could not be renewed, otherwise the client would have done so
beforehand.

That suggests that the original IP address was no longer valid and was
released by the client. If the SSH connection was using that IP
address, then yes the connection (or any other using it) would have been
disrupted.

Well, it's on XP Home running a Putty SSH keep-alive window that sends back
the time around once a minute. After the connection was lost we find on XP

$ ipconfig -all
....
Lease Obtained. . . . . . . . . . : Sunday, August 26, 2007 4:51:58 PM
Lease Expires . . . . . . . . . . : Monday, August 27, 2007 4:51:58 PM

and in the XP SSH window used to keep the line up by appearing to use it

.... [many hours of unix date command output] ...
Sun Aug 26 16:40:28 EDT 2007
Sun Aug 26 16:41:48 EDT 2007
Sun Aug 26 16:42:51 EDT 2007
Sun Aug 26 16:43:44 EDT 2007
Sun Aug 26 16:45:03 EDT 2007
Sun Aug 26 16:45:54 EDT 2007
Sun Aug 26 16:47:06 EDT 2007
Sun Aug 26 16:48:00 EDT 2007
Sun Aug 26 16:49:05 EDT 2007
Sun Aug 26 16:50:15 EDT 2007
Sun Aug 26 16:51:12 EDT 2007

and the putty window then says that server unexpectedly dropped the connection.

Notice the output ends when the new lease was acquired. Too much of a coincidence.

I imagine though that it kept the same IP address, there being no contending system
and it already having the lowest address.

I thought perhaps there's a session number of something that does change when the
connection renews, but who knows.

--
rhhardin@xxxxxxxxxxxxxx

On the internet, nobody knows you're a jerk.
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