Openvpn client can't access UDP port of device



  • I have a PFSense 2 firewall installed as the gateway for our network.  It is the only device exposed publicly.  I have set up OpenVPN for "road warriors" to connect to our network remotely.  We have a proprietary device on our internal network that has both a web server (at port 80) and a proprietary service (at port 1876) that we connect to using our set up software.

    Clients are able to connect to the internal device's web port just fine.  However, when we try to make a connection to its UDP port with our software, it times out as if it's not there.  Both ports work just fine from computers also on the internal network.



  • Maybe only permitting TCP under Firewall>Rules, OpenVPN?



  • @cmb:

    Maybe only permitting TCP under Firewall>Rules, OpenVPN?

    Under Firewall-> Rules, OpenVPN I have

    ID Proto Source Port Destination Port Gateway Queue Schedule Description

    • *         * *         * *         none                   OpenVPN vpn1 wizard


  • Check the firewall on the systems behin pfsense if they allow traffic on UDP ports from the OpenVPN subnet - or disable it for testing



  • @Nachtfalke:

    Check the firewall on the systems behin pfsense if they allow traffic on UDP ports from the OpenVPN subnet - or disable it for testing

    Pfsense is the only firewall and gateway on our local network involved.  The device serving both http (TCP) over port 80 and proprietary UDP over port 1876 has no firewall.  Also, as I mentioned, that computer when on the local network can access both resources just fine.  It's only when remote and connecting via OpenVPN that UDP/1876 traffic doesn't seem to get through.


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