#NETGEAR GENIE DISABLE FIREWALL HOW TO#

A SIP ALG router rewrites the REGISTER request to the proxy doesn't detect the NAT and doesn't maintain the keepalive (so incoming calls will be not possible). Many SIP proxies maintain the UDP keepalive by sending OPTIONS or NOTIFY messages to the UA, but they just do it when the UA has been detected as NAT'd during the registration. Common routers just maintain the UDP 'connection' open for a while (30-60 seconds) so after that time the port forwarding is ended and incoming packets are discarded by the router. This REGISTER is modified by the ALG feature (if not the user wouldn't be reachable by the proxy since it indicated a private IP in REGISTER 'Contact' header).

Lack of incoming calls: When a UA is switched on it sends a REGISTER request to the proxy in order to be localisable and receive any incoming calls.

Therefore if you are experiencing problems we recommend that you check your router settings and turn SIP ALG off if it is enabled. This can give you unexpected behaviour, such as phones not registering and incoming calls failing. SIP ALG modifies SIP packets in unexpected ways, corrupting them and making them unreadable.

How can it affect VoIP?Įven though SIP ALG is intended to assist users who have phones on private IP addresses (Class C .X), in many cases it is implemented poorly and actually causes more problems than it solves. A NAT router with a built-in SIP ALG can re-write information within the SIP messages (SIP headers and SDP body) making signalling and audio traffic between the client behind NAT and the SIP endpoint possible. If the SIP proxy doesn't provide a server-side NAT solution, then an ALG solution could have a place.Īn ALG understands the protocol used by the specific applications that it supports (in this case SIP) and does a protocol packet-inspection of traffic through it. In some scenarios, some client-side solutions are not valid, for example, STUN with symmetrical NAT router. Generally speaking, ALG works typically in the client side LAN router or gateway.

There are various solutions for SIP clients behind NAT, some of them in the client side (STUN, TURN, ICE), others are in the server side (Proxy RTP as RtpProxy, MediaProxy). Many routers have SIP ALG turned on by default. Its purpose is to prevent some of the problems caused by router firewalls by inspecting VoIP traffic (packets) and if necessary modifying it.

#NETGEAR GENIE DISABLE FIREWALL HOW TO#

If you cannot disable Zone Alarm's firewall using the step above, it is possible that an update have changed the procedure on disabling the firewall. Please visit the Zone Alarm Anti-virus website for the steps on how to disable their firewall.Īlso search the Zone Alarm forum for such issues as this product continually logging people off AOL, or Windows XP wrongly reporting that Zone Alarm has been turned off.SIP ALG stands for Application Layer Gateway and is common in all many commercial routers.Right-click the Zone Alarm icon in the System Tray, and select Shutdown Zone Alarm.If you cannot disable McAfee 's firewall using the steps above, it is possible that an update have changed the procedure on disabling the firewall. Please visit the McAfee Anti-virus website for the steps on how to disable their firewall.

Finish the rest of the McAfee installation as you did before.Reinstall McAfee, selecting Custom Installation.If you cannot disable Norton's firewall using the step above, it is possible that an update have changed the procedure on disabling the firewall. Please visit the Norton Anti-virus website for the steps on how to disable their firewall.Right-click the Norton Internet Security icon on the system tray and select Disable.Look for sections such as Using Basic Firewall Services or Allowing and blocking keywords, sites, services. (Note that you must be logged on as administrator, if you are not, no 'Advanced' tab will appear as described.) For hints about using these Windows features, search firewall in Windows help, and select the article Enable or Disable Internet Connection Firewalls.Ĭonsult your router user guide. See How to: Enable or Disable Internet Connection Firewall In Windows XP. The Windows firewall may be turned on without you knowing, for example, if the XP Network Setup Wizard was used. Two situations are described here, but the general approach applies to any firewall active on a NETGEAR LAN. If this happens, use the NETGEAR firewall, and disable the other. Both are trying to do the same job the conflict may cause an otherwise good Internet connection to drop. Often two firewalls on the same LAN conflict.

Netgear genie disable firewall