Netgate Discussion Forum
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Search
    • Register
    • Login

    1:1 NAT Issue with UDP After Upgrade to 21.02.2 on SG5100

    Scheduled Pinned Locked Moved NAT
    1 Posts 1 Posters 242 Views
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • J
      jeremyjvogel
      last edited by

      After seeing this https://redmine.pfsense.org/issues/11436, I tried updating from 2.4.5-p1 to 21.02.2 on an SG-5100. Now 1:1 NAT is not working on the non-default WAN for a UDP service running there. TCP seems to work fine.

      There are two WAN interfaces, WAN0 and WAN1. When UDP traffic comes in WAN1, it goes out WAN0, which I discovered through packet captures. Changing the configuration to standard NAT with port forwarding made no difference. It seems like the reply-to function of the firewall rules is broken or is not working for UDP and it uses the default gateway instead. Specifying the gateway as WAN1 in the associated firewall rule made no difference and actually broke the TCP port forwarding that was reportedly fixed in the bug report.

      I'm wondering if there is a configuration setting I am missing that would send packets our the wrong WAN? Of course, this was working fine on 2.4.5-P1.

      1 Reply Last reply Reply Quote 0
      • First post
        Last post
      Copyright 2025 Rubicon Communications LLC (Netgate). All rights reserved.