Hello Kaffeesurrogat, 49152 is only "front-end" port for TURN, it is being used for orchestrating and IP-resolving (one or both parties are using resolvable "grey" IP) In case IP are not "resolvable" multimedia traffic is being forwarded through TURN using below UDP port range (can be changed to be TCP) #min-port=49152 #max-port=65535
On Sat, 15 Aug 2020 at 01:48, kaffeesurrogat <[email protected]> wrote: > Dear List, > > I'm having trouble to connect my cam/mic to my external server when > connecting from my workplace, Maxim assumed that my > workplaces-it-service blocked some important ports. I did the following > to test it. > > > 1) > > opening up port 49152 on my server > > ls | nc -l -u -p 49152 > > > 2) from home (om is running smoothly) > > sudo nmap -sU <server-ip> -p 49152 > > command under 1) quits and nmap responds with > > > Host is up (0.016s latency). > > PORT STATE SERVICE > 49152/udp open unknown > > > 3) from my workplace-pc > > first: > issuing command 1). > > second: > sudo nmap -sU <server-ip> -p 49152 > > response: > Note: Host seems down. If it is really up, but blocking our ping probes, > try -Pn > > > third: > sudo nmap -Pn -sU 81.169.223.177 -p 49152 > > response > > PORT STATE SERVICE > 49152/udp open|filtered unknown > > > Does it confirm the assumption, that some workplace-firewall-rule blocks > my way ? > > > Have fun and many many thanks, > > Kaffeesurrogat > > -- Best regards, Maxim
