View source for Wireshark monitoring traffic inside YateBTS


Traffic can be captured/analized with Wireshark in YateBTS when using '''GSM roaming''' or '''GSM dataroam''' working modes.

Do do so:
* Enable GSMTAP.GSM capture from the Yate rmanager (telnet 0 5037)
** mbts config TAP Control.GSMTAP.GSM on (GSMTAP.GSM will capture '''SIP and RTP packages''')

* Enable GSMTAP.GPRS capture from the Yate rmanager 
** mbts config TAP Control.GSMTAP.GPRS on (GSMTAP.GPRS will capture '''GTP-C and GTP-U packages''')

* To check if GSMTAP is enabled type '''mbts config TAP''' in Yate rmanager.
<pre>
yate-sdr@ybts-UNCONFIG> mbts config TAP 
Control.GSMTAP.GPRS on
Control.GSMTAP.GSM on
Control.GSMTAP.TargetIP 127.0.0.1     [default]
yate-sdr@ybts-UNCONFIG> 
</pre>

* To capture traffic use tcpdump: '''tcpdump -i any udp port 4729 -w GSMTAP-yatebts.pcap''' 
* Or Wireshark, already installed on the LatKit/SatSite by adding a custom filter: '''udp port 4729'''.