python - Bind failed. Error Code : -2 Message Name or service not known -

i'm trying use python script git.

its purpose respond monitoring packets sent prtg network monitor.

so downloaded , chmoded , executed (-d) on client's debian system:

linux xxxxxxxxx 3.2.0-4-amd64 #1 smp debian 3.2.54-2 x86_64 gnu/linux 

and obtained following error:

bind failed.

error code : -2 message name or service not known

the error apparently appears when bind action attempts bind port 50000 devices.

is debian, or system issue or permissions issue?