Start server on port < 1024

[davefv]

Hi! I'm trying to start a server using cli on port 1023 and then it throws an error:
$ jamulus -s -p 1023

• server mode chosen
• selected port number: 1023
  Jamulus: Network Error: Cannot bind the socket (maybe the software is already running).

I tried using some ports below 1024 and it doesn't work. Why? What can I do to start server on port below 1024?

Thank you very much!

[rdica]

@davefv Using ports below 1024 (privileged ports) requires the service to run as root. Jamulus does not require being run as root, nor does it need to run on a privileged port.
Why do you want to use a privileged port?

[davefv]

Thank you for your answer!

I tried to run server on privileged ports because I am using an environment which doesn't let me open new ports, but there are already some privileged ports opened.

And you are right!I can launch jamulus server using ports below 1024 running as root! Are there any security issues or drawbacks running jamulus server as root?

Thank you very much!

[rdica]

While I'm unaware of any current security vulnerabilities in Jamulus server itself (I'm not the authority on this!), it's always wise to run services with least privilege, aka not using root when thats not required.
Drawbacks include, but are not limited to, the potential for jamulus server filling up your disk with logging and/or recording. One must also consider that unknown/undisclosed vulnerabilities can potentially render your server compromised or worse.

I'm curious what environment cannot allow you to bind on unprivileged ports as a user, or is there an isp/router issue preventing your use of unprivileged ports?

[davefv]

Yes, there is a router problem. I'm contacting the ISP to resolve this, because, as you mentioned, there's no need to run server with root privileges.

Thank you very much for your answer!