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Cisco Bug: CSCup60520 - 8.0.6 DNS retry code: default failure count is too low

Last Modified

Mar 13, 2018

Products (1)

  • Cisco Web Security Appliance

Known Affected Releases

8.0.6-053

Description (partial)

Symptom:
The WSA may send out alerts 
Critical <System> s670c01.csr: Reached maximum failures querying DNS server

and log these messages to the system logs
Thu Jun 26 14:26:23 2014 Critical: Reached maximum failures querying DNS server 172.29.176.4

Conditions:
Our default DNS failure rate for flagging a DNS server as down, is too low, and can trigger when local DNS servers are functioning properly.  This results in alerts and flagging DNS servers as down, until we detect a successful reply, from the affected DNS server.
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