Preview Tool

Cisco Bug: CSCup75103 - On IOS upgrade SSH/Telnet to router stops working if nat is configured

Last Modified

Nov 27, 2020

Products (2)

  • Cisco 2600 Series Multiservice Platforms
  • Cisco 2600 Series Multiservice Platforms

Known Affected Releases

15.3(3)M2 15.3(3)M4 15.4(3)M1

Description (partial)

On IOS upgrade to 153-3.M2.bin & onwards, we cannot telnet/ssh the router where nat is configured.

This problem only exists if we have nat entry configured using ip which also exist on an interface, i.e
ip nat inside source static tcp  <local ip> <port no>  <global ip> <port no>

Related Community Discussions

Cisco C891F unable to telnet/ssh to WAN port. connection refused.
Team, I'm unable to remotely (WAN interface) access this Cisco C891F router using the underneath config. telnet and ssh both works using the LAN interface. the error message is get is &quot;Connections refused&quot; With debug ip packet i do see an RST packet as a response to the incoming telnet request packet. Current configuration : 9161 bytes ! ! Last configuration change at 15:45:37 CET Fri Oct 30 2015 by support ! NVRAM config last updated at 16:27:05 CET Fri Oct 30 2015 by support ! NVRAM config last ...
Latest activity: Dec 09, 2015
Bug details contain sensitive information and therefore require a account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.