We have 4 production servers are accessing ICMC service which is hosted in following URL “pubsub.googleapis.com”, If all 4 servers in common NAT rule then there is a time-out error observed which caused ICMC service failure. We have tried change the rule from FQDN and category based rule but still time-out noticed , Application team escalated to Google support ,though they are not able to find the root cause ,However ,Suggested to change TCP time wait session to 120 sec but it didn’t restore the failure. As a workaround ,We assigned dedicated IP’s for each servers which resolve the issue. Is there any way we could implement the NAT rule for these 4 servers, PAT is not working as well for this. Thanks!
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