TCP Connection timeout



  • Hi, we used pfsense since long time ago without any issue.
    We are currently having some issue with outgoing (internal -> wan) tcp connection (smtp) timeout.
    The pfsence box (an esxi vm) is configured as a transparent bridge with a rule which allow traffic from the internal host to anywhere using any protocol (using a customized gateway, cause there are two ip network on the same physical).
    On the server behind pfsense the most (almost all) outgoing connection connection hang like this (netstat output):
    tcp        0    443 xxx.xxx.125.18:58451    65.55.92.136:25        ESTABLISHED
    tcp        0  1185 xxx.xxx.125.18:46163    65.55.37.120:25        ESTABLISHED
    tcp        0  3442 xxx.xxx.125.18:58348    65.55.92.136:25        ESTABLISHED

    I've already checked the state table which is quite empty 605/15000. Where's the problem ? Any hint ?
    Note: if I remove the firewall in between all work flowless.


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