Telnet or SSH fails to 2800 router

Unanswered Question
Oct 21st, 2009
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Telnet shows.....Connecting To IP.Addres...and disconnects....whereas...SSH session....throws open a blank screen.....and then disconnects.


Refer to the connection diagram attachment:

The problem is seen when trying to telnet or ssh to R1 or R2.

Capture from FW shows:


nop (bad opt] as follows:

3:17:49:11.612127616 802.1Q vlan#16 P0 > S 946657554:946657554(0) win 65535 <mss 1460,nop,[bad opt]>

4: 17:49:13.612129206 802.1Q vlan#16 P0 > 22: S 3647948750:3647948750(0) win 65535 <mss 1460,nop,[bad opt]>

5: 17:49:14.612130136 802.1Q vlan#16 P0 > S 1880434267:1880434267(0) win 65535 <mss 1460,nop,[bad opt]>

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bmcginn Wed, 10/21/2009 - 16:54
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Mate, just by looking at those logs, I would say we need some more info.

Firstly, where is that capture happening? On the outside interface of the firewall or the inside interface?

Is NAT occurring on the firewall or the router?

Does the router have a route back into the network?

Firstly though, which interface on the firewall is the capture being done?



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