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Cisco Bug: CSCur00234 - WSA doesn't fallback to IPv4 if site is not reachable with IPv6

Last Modified

Dec 17, 2020

Products (1)

  • Cisco IronPort Web Security Appliance Software

Known Affected Releases

8.0.6-078 8.0.6-101

Description (partial)

If appliance is configured to prefer IPv6 in DNS configuration and remote site is not reachable with IPv6 site become unreachable even if it is reachable with IPv4.

Domain name is resolvable to both IPv4 and IPv6 addresses
Appliance DNS configuration is set to prefer IPv6
Remote site is not reachable with IPv6
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