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Cannot open any ports via NAT or firewall rule but existing ones work?

traderjay
Hi All - I am trying to enable remote access for the Plex server and it requires the opening of ports in the 32xx range. 

I enabled the following DNAT rule: TCP 1:65535 → 32400.

Unfortunately the port remains closed when testing using this site and on Plex Server's network config:
Open Port Check Tool

I tried a variety of port numbers and none of them seemed to work which is very baffling. As a last resort, I tried some common port used by RDP such as 3389 and the connection worked....

Lastly, I am also using the following rule on my UTM:

Internal (Network) -> any -> any

I've also reviewed the firewall log and below is the dropped packet:

2015:10:19-12:30:19 homestation ulogd[6592]: id="2001" severity="info" sys="SecureNet" sub="packetfilter" name="Packet dropped" action="drop" fwrule="60001" initf="ppp0" srcip="54.193.168.189" dstip="24.140.238.16" proto="6" length="60" tos="0x00" prec="0x00" ttl="47" srcport="2985" dstport="32400" tcpflags="SYN"


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  • 0
    I'm with Scott - I think it's an indication of some other unusual configuration, but if the wheels keep turning, I say keep riding the bike!

    Cheers - Bob
     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
  • 0 in reply to BAlfson
    I'm with Scott - I think it's an indication of some other unusual configuration, but if the wheels keep turning, I say keep riding the bike!

    Cheers - Bob


    Hi Bob - My Sophos is just a fresh install with no other major host and definitions configured. The only rule that I am using now is the firewall rule 

    Any IPV4 -> Any -> Any.

    I guess this rule only allows for outgoing traffic in the most common ports and since Plex server requires a special port in the 32400 range then a custom rule must be setup to allow the traffic through?
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  • 0 in reply to BAlfson
    I'm with Scott - I think it's an indication of some other unusual configuration, but if the wheels keep turning, I say keep riding the bike!

    Cheers - Bob


    Hi Bob - My Sophos is just a fresh install with no other major host and definitions configured. The only rule that I am using now is the firewall rule 

    Any IPV4 -> Any -> Any.

    I guess this rule only allows for outgoing traffic in the most common ports and since Plex server requires a special port in the 32400 range then a custom rule must be setup to allow the traffic through?
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