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Fortinet / Fortigate

February 2018

Information passed along by a customer for the Fortigate OS version 5.4.x

Fortigate configuration that turned off the SIP and allowed audio:

 

Fortigate OS version 5.4.x

 edit 13

set name sip

set port 5060

set protocol 17

next

end

 

config system settings

set sip-helper disable

set sip-nat-trace disable

set default-voip-alg-mode kernel-helper-based

end

 

Then create a rule allowing all traffic outbound from the LAN to the OnSIP public IPs 199.7.172.0/22

 

After that is done reboot the firewall.  This will clear all the sessions.

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