udp-holepunch - Python script for UDP holepunching using a webserver. With an example of SSH using this and sctp-echo.

git clone https://benconnors.ca/git-repos/udp-holepunch

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commit 9be44070e11307f3a855a8ab6bb2c525930012e1
parent edbe28521348adf794b914c3372988b2c94623ed
Author: Ben Connors <benconnors@outlook.com>
Date:   Wed,  5 Aug 2026 16:10:48 -0400

Fix to reduce CPU usage

Diffstat:

Mssh_holepunch_client.py | 2+-


Mssh_holepunch_server.py | 2+-


2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/ssh_holepunch_client.py b/ssh_holepunch_client.py
@@ -81,4 +81,4 @@ if __name__ == "__main__":
         stdout=sys.stdout.buffer.raw, ## Must use raw or e.g. vi will crash it
         stdin=sys.stdin.buffer.raw,
     )
-    client.communicate()
+    client.wait()
diff --git a/ssh_holepunch_server.py b/ssh_holepunch_server.py
@@ -113,5 +113,5 @@ if __name__ == "__main__":
 
     ## Communicate with socat; this lets us bypass the fact that sctp-echo doesn't
     ## have timeout functionality
-    socat.communicate()
+    socat.wait()
     server.terminate()