UDP Forwarding problem

[LCF_R]

Hello!
I have RT-AC87U with 384.7_2 firmware.
There is a problem with port forwarding for Teamspeak 3 Server, in UDP protocol. It seems that UDP port forwarding is not working at all. Here is a screenshot with forwarding settings:
http://prntscr.com/lb4ihi
And there is port scan result:
http://prntscr.com/lb4lrn

I tried "UDP" and "BOTH" settings, no matter, UDP forwarding is not working.

TCP forwarding is OK.

How can I fix UDP forwarding?
Thank you!

 

[ColinTaylor]

How are you testing this. From your screen shot it looks like you're testing this from within your LAN which is not a valid test.

 

[LCF_R]

How are you testing this.

Test was via internet, something like https://hackertarget.com/udp-port-scan/

 

[ColinTaylor]

As it says on that page, it only tests those specific ports (unless you signed up for a membership). So it's not testing your forwarded ports.

 

[LCF_R]

As it says on that page, it only tests those specific ports (unless you signed up for a membership). So it's not testing your forwarded ports.

This test can scan any port: https://networkcenter.info/tests/portcheck
It says that 9987 and 2010 UDP ports are closed

 

[ColinTaylor]

Are you running a client or a server? Looking at this list you appear to have a mixture of incoming and outgoing ports.

If you're running a server then you only need to forward incoming (client to server) ports, all outgoing ports are open by default.

EDIT Just remembered you said you're running a server in post #1 .

 

[LCF_R]

Are you running a client or a server?

I'm running a server version.

Looking at this list you appear to have a mixture of incoming and outgoing ports.

This is a netstat log for TeamSpeak Server:

  TCP    0.0.0.0:10011          0.0.0.0:0              LISTENING       13400

  TCP    0.0.0.0:30033          0.0.0.0:0              LISTENING       13400

  TCP    [::]:10011             [::]:0                 LISTENING       13400

  TCP    [::]:30033             [::]:0                 LISTENING       13400

  UDP    0.0.0.0:9987           *:*                                    13400

  UDP    0.0.0.0:50609          *:*                                    13400

  UDP    [::]:9987              *:*                                    13400

If you're running a server then you only need to forward incoming (client to server) ports, all outgoing ports are open by default.

I can't see incoming/outcoming settings in web gui of my router. How can I fix my problem?

 

[ColinTaylor]

I'm running a server version.

This is a netstat log for TeamSpeak Server:

  TCP    0.0.0.0:10011          0.0.0.0:0              LISTENING       13400

  TCP    0.0.0.0:30033          0.0.0.0:0              LISTENING       13400

  TCP    [::]:10011             [::]:0                 LISTENING       13400

  TCP    [::]:30033             [::]:0                 LISTENING       13400

  UDP    0.0.0.0:9987           *:*                                    13400

  UDP    0.0.0.0:50609          *:*                                    13400

  UDP    [::]:9987              *:*                                    13400

That ties up with the server ports then. So you ought to delete the incorrect 2008 and 2010 port forwarding rules to avoid confusion.

I can't see incoming/outcoming settings in web gui of my router.

There is nothing in the GUI about outgoing ports because they are always open. The port forwarding rules apply to incoming traffic. You can see their current status at System Log > Port Forwarding.

How can I fix my problem?

I don't use TeamSpeak so I can't really say.