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Connectivity issues through Security Gateway in Proxy mode due to an extra space in DNS Query sent by the Security Gateway
Symptoms
  • Connectivity issues through Security Gateway in Proxy mode due to an extra space in DNS Query sent by the Security Gateway.

  • SmartView Tracker logs show that connections are rejected due to DNS timeout:

    Action = Reject
    Reason = Proxy: DNS timeout/error; Connection was rejected due to DNS timeout or error
  • Traffic capture on Security Gateway in Proxy mode shows that DNS Query sent by Security Gateway to a DNS server contains an extra space at the end of the Hostname (e.g., the length of "helpdesk.mycompany.com" string is 23 bytes = 22 letters + 1 extra space).

  • When running the nslookup command to resolve a hostname, traffic capture shows that DNS Query does not contain an extra space.

Solution
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