Click the Firewall tab at the top and click Settings from the sub-menu.Click on Routing & Firewall along the left side.Sign in to your UniFi security gateway.Uncheck the SIP and the RTSP checkboxes.

Use the Telnet client from the Command Prompt.Uncheck SIP ALG, RTSP ALG, and H323 ALG checkboxes.Expand the NAT Forwarding menu on the left side of the screen.Click the Accept button to save the changes.Click on the UDP tab and modify the default UDP connection timeout to 300 seconds.To increase UDP timeouts, navigate to the Firewall Settings, then Flood Protection.Under System Setup on the left side of the screen, click on VoIP.Locate Session Limit under Security/Firewall.Under the Security/Firewall, click on Advanced Settings.Expand the Setup menu on the left side of the screen.You may also run this command from the terminal: /ip firewall service-port disable sipįor Netgear routers with the Genie interface: Click on the Service Ports tab and disable it through the GUI.Type in ‘5060’ into the Start Port and End Port for the ‘Triggering Range’ and ‘Forwarded Range’ fields.įor Mikrotik routers, SIP ALG is known as SIP Helper.Click on Applications and Gaming on the Admin page.Go to the ‘Advanced’ section on the Admin page.Under Application Layer Gateway, verify SIP is unchecked.On the left side of the screen, click on Connectivity.Confirm its deletion by executing this command:.Find the SIP session instance, typically indicated by #12.Use the following commands from the CLI interface:Ĭonfig system session-helper show system session-helper.Uncheck SIP from Application Level Gateway Configuration.Set both UDP and TCP Endpoint Filtering to Endpoint Independent.Click Firewall Settings on the left side of the screen.Locate the Application Level Gateway (ALG) Configuration.Locate ‘Class inspection_default’ under ‘Policy-map global_policy’. You will need to use another router that supports disabling SIP ALG.Ĭisco General and Enterprise-Class routers: no ip nat service sip tcp port 5060 no ip nat service sip udp port 5060Ĭisco PIX routers: no fixup protocol sip 5060 no fixup protocol sip udp 5060 We recommend configuring your gateway to function only as a modem, not a router (Bridge Mode). This broadband gateway does not support disabling SIP ALG.

Change the SIP Passthrough setting to “Disable.”.

Under the Advanced Settings section, click WAN.

Turn off the Authentication Header Forwarding.

Under the Firewall section, click on Advanced Firewall.

Navigate to the gateway’s IP (192.168.0.1).Īuthenticate without a username, and use the password located on the unit’s sticker.If you are using the terminal, issue the following command: no ip firewall alg sip Click the checkbox to Allow Incoming WAN ICMP Echo Requests (for traceroute and ping), then click Apply.Select Advanced, click Yes to accept the warning, then click Remote Administration.Ensure SIP ALG is disabled by removing the check.Select Advanced, click Yes to accept the warning, then click ALG’s.Signs of SIP ALG or Double NAT How to disable SIP ALG Router Manufacturer

Turn off sip alg