UDP Port Checker

[SimonMac]

Anyone know if there is a service similar to telnet to check to see if UDP ports are open?

[stek]

Anyone know if there is a service similar to telnet to check to see if UDP ports are open?

Netcat, you need to check it both ways...

[TheFaQQer]

First hit on Google gives https://pentest-tools.com/discovery-...er-online-nmap

[TheFaQQer]

Third hit on Google shows how to do in in Linux - Linux Administration: How to test UDP Connectivity ?

[stek]

Netcat is simpler and mostly likely already installed;

# nc -zu 10.10.10.10 53
Connection to 10.10.10.10 53 port [udp/domain] succeeded!

...to see if you have DNS connectivity. You'll also need TCP for DNS.....

[SimonMac]

Most of the utils seem to need to be run from the server that you are trying to check, alas I have a router that I am trying to connect too

[stek]

Most of the utils seem to need to be run from the server that you are trying to check, alas I have a router that I am trying to connect too

Actually no - you run from a source TO the target, but you (mostly) would need to test both ways, what is it your actually trying to do?

[SimonMac]

Actually no - you run from a source TO the target, but you (mostly) would need to test both ways, what is it your actually trying to do?

I have installed OpenVPN on a router, and it uses UDP to connect to a designated port, when I try to connect it says

Management: >State (random numbers) WAIT

Quick google states to see if the firewall is open on that port, which first point of call I am trying to do