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Cisco Bug: CSCtc41730 - ACS resets SYN packets if MSS isn't set

Last Modified

Feb 22, 2014

Products (1)

  • Cisco Secure Access Control Server Solution Engine

Known Affected Releases

5.0(0) 5.0(0.8)

Description (partial)

Symptom:
TACACS authentication attempts from some devices fail with no response from the ACS. Packet capture shows TCP reset being sent immediately by ACS.

Conditions:
This will occur if the TCP SYN packet doesn't have the MSS option set.
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  • Status
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