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I have a program that needs port 7777 to function. Updating to Ventura broke it. Now I am getting

Ports are not available: listen udp 0.0.0.0:7777: bind: address already in use

Checking who uses port 7777:

$ lsof -i -P -n | grep 7777                                                                                                       
identitys  1471  ira   32u  IPv4 0xcea026c85ca11a61      0t0  UDP 127.0.0.1:7777

$ ps 1471

  PID   TT  STAT      TIME COMMAND
 1471   ??  S      0:00.89 /System/Library/PrivateFrameworks/IDS.framework/identityservicesd.app/Contents/MacOS/identityservicesd

This describes what identityservicesd.app is about: What is identityservicesd?

Killing it just causes it to restart. Disabling it probably isn't a good idea, it seems important. Can I change its port? How did it run prior to Ventura?

And, maybe because I am not familiar enough with UDP, how can it hog the port if its status isn't "LISTEN"?

Irina Rapoport
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  • Port 7777 is probably set in a plist file that is not user configurable. Is it possible to tell the program to bind to your Ethernet or Wi-Fi interface (for example en0) instead of to all of your interfaces (0.0.0.0)? identityservicesd binds to the loopback interface (lo0) only. – jaume Nov 12 '22 at 11:26
  • Is there a way to do that from command line? – Irina Rapoport Nov 12 '22 at 14:31
  • Maybe. What program is it? – jaume Nov 12 '22 at 14:53
  • Something proprietary. – Irina Rapoport Nov 13 '22 at 23:29
  • I can only guess, but some programs have configuration files or command-line arguments (running the program with -h, -help or --help may list them). If you can't change the port identityservicesd binds to, I'd recommend that you contact the program's developer. – jaume Nov 14 '22 at 07:57

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