problems when using telnet when server is running as service

[dekeln]

Hi, i am running a gateway fw as a service on an 'bionic-armhf' machine (ubuntu 18.04 TLS). this service acts as the cli server (like in the 'complete' example). when trying to telnet, it stuck and takes forever to respond. when running the gateway fw from bash (not as a service), the telnet works just fine. any idea?

i might have some clue: when running the complete example as a service, the cpu usage is ~98%. when running it from bash, the cpu usage is ~1%.