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Cisco Bug: CSCtb08675 - TACACS+ rem_addr and port field empty after 3 SSH authen attempt fails

Last Modified

Jan 27, 2017

Products (1)

  • Cisco IOS

Known Affected Releases


Description (partial)

Symptoms: If a user fails to successfully establish a SSH connection on the
first attempt, subsequent attempts may also fail.

Conditions: Occurs when a Cisco router is configured to authenticate SSH
connections using TACACS+.  The rem_addr field in the TACACS+ header may be empty
if the user does not successfully authenticate on the first attempt. This may
cause authentication or authorization failures if rem_addr information is
required by the TACACS+ server. 
This problem is exclusive to Sierra and SXH releases
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
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  • Known Fixed Releases
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