![]() ![]() Not always required if there is only one network adapter.A different tool similar to TShark. i Select interface that the capture is to take place on, this will often be an Ethernet card or wireless adapter but could also be a VLAN interface. Ensure you provide the called number, calling number and how many times that number was called in the trace. Zip up and send in the sip-trace.pcap file (ensure it is zipped) along with the full details of which call the issue occurred on. 4) Stop the tcpdump using CTRL+C 5) Log into the server using WINSCP and download the file "sip-trace.pcap" eg: "tcpdump -s 0 -i any -w sip-trace.pcap" 3) Reproduce the issue. screen -dm tcpdump -s0 -w/tmp/capture-dep`hostname -s`-`date +%Y%m%d-%H%M%Z`.pcap -C150 udp and port 5060ฤก) Log into the server using SSH protocol 2) Run the command as shown in the above section.This also tags the file name with the host name and timestamp. Run tcpdump in the background from a screen session so you can disconnect while it runs.Then select the session you want to look at and click "Flow." If you've captured the RTP traffic (Option: -T rtp), you may be able to play the audio of the call as well. To easily view the SIP transaction, load the PCAP into wireshark and goto Telephony -> VoIP Calls.If we wanted to limit it to a specific IP address, like a phone or SIP carrier, we could do:.tcpdump -s0 -w/tmp/capture.pcap -C50 udp and port 5060.If the file is bigger than 50MB it will start another file. This will create a file called capture.pcap in the tmp directory of everything on port 5060. If we want to get a TCP Dump of everything on port 5060 we can use the following command.
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