ngrep
### capture all SIP packages on 5060 on all interfaces ngrep -W byline -td any . port 5060 ### capture all SIP packages containing 'username' on port 5060 on all interfaces ngrep -W byline -tqd any username port 5060
### capture all SIP packages on 5060 on all interfaces ngrep -W byline -td any . port 5060 ### capture all SIP packages containing 'username' on port 5060 on all interfaces ngrep -W byline -tqd any username port 5060