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

    Blocks

    Scheduled Pinned Locked Moved Problems Installing or Upgrading pfSense Software
    2 Posts 2 Posters 1.2k 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.
    • D
      demian
      last edited by

      Hi people, I have a doubt,What does these mean?
      *TCP:FA
      *TCP:RA
      *TCP:R

      I see some connections blocked where with that info, and  they should be passed, on my WAN interface..
      I have  a NAT rule:
      WAN TCP/UDP * * WAN address 80 (HTTP) 10.20.11.3 80 (HTTP) HTTP

      I get this in logs:
      block
      Mar 12 09:07:06 WAN 190.23.10.51:10139 10.20.11.3:80 TCP:R
      block
      Mar 12 08:43:12 WAN 130.120.110.15:52030 10.20.11.3:80 TCP:RA
      block
      Mar 12 08:43:02 WAN 130.120.110.15:52032 10.20.11.3:80 TCP:FA

      thanks

      1 Reply Last reply Reply Quote 0
      • johnpozJ
        johnpoz LAYER 8 Global Moderator
        last edited by

        Look at your :R :FA, etc

        Firewall will pass traffic based upon state, if you get a state mismatch then traffic can be blocked.  If traffic shows FA,

        TCP Flags: F - FIN, S - SYN, A or . - ACK, R - RST, P - PSH, U - URG, E - ECE, W - CWR

        Its a Fin Ack - but if firewall does not show correct state for the session then it would block that sort of packet.

        if you reboot pfsense, or clear the states then yeah you can see those quite often.  Or wireless can happen too if you drop packets and then get packets with wrong state on them, etc.

        Common to see such traffic.

        An intelligent man is sometimes forced to be drunk to spend time with his fools
        If you get confused: Listen to the Music Play
        Please don't Chat/PM me for help, unless mod related
        SG-4860 24.11 | Lab VMs 2.8, 24.11

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