View source for Network:Firewall:Configuration

===Other Network Restrictions===
{{Warning|Some firewalls or remote ISP might also restrict VoIP, you can use the following tests to verify connectivity}}
{{Notice|If you have some connectivity problem, please perform the tests below, check the trace on your firewall and inform our support from which IP did you test it and at which exact time}}

*''Ping the VoIP platform which is opened to ping from the whole world''

 '''ping s1.12345.bus.ipvoip.ch'''
 PING vtx.res.ipvoip.ch (212.147.47.217) 56(84) bytes of data.
 64 bytes from fix.47.147.212.vtx.ch (212.147.47.217): icmp_seq=1 ttl=53 time=7.65 ms
 64 bytes from fix.47.147.212.vtx.ch (212.147.47.217): icmp_seq=2 ttl=53 time=8.32 ms
 64 bytes from fix.47.147.212.vtx.ch (212.147.47.217): icmp_seq=3 ttl=53 time=8.14 ms
 --- s1.12345.bus.ipvoip.ch ping statistics ---
 3 packets transmitted, 3 received, '''0% packet loss''', time 2002ms
 rtt min/avg/max/mdev = 7.659/8.041/8.324/0.289 ms

*''SIP is also allowed to work on TCP, so you can use telnet to verify your connectivity towards the platform (you need to see "connected" message)''

 '''telnet s1.12345.bus.ipvoip.ch 5060'''
 Trying 212.147.47.217...
 '''Connected''' to s1.12345.bus.ipvoip.ch.
 Escape character is '^]'.