Even though SIP ALG is intended to assist users who have phones on private IP addresses (Class C 192.168.X.X), in many cases it is implemented poorly and actually causes more problems than it solves. SIP ALG modifies SIP packets in unexpected ways, corrupting them and making them unreadable.

Apr 09, 2019 SIP Alg on netgear routers - NETGEAR Communities SIP ALG was initially created to rewrite SIP packets on SIP port 5060 for the purpose of bypassing NAT and to not be as intrusive to the WAN network. Unfortunately, the rewriting of the packets can really cause problems especially since most VoIP providers have a system for SIP traffic that coincides with the SIP ALG. What’s VPN Passthrough? | TP-Link What types of VPN are supported? All TP-Link routers support VPN Passthrough for PPTP, L2TP and IPSec (ESP). Note: VPN Passthrough does NOT mean the router can create a VPN endpoint. VPN Passthrough is a feature that allows VPN traffic created by other endpoints to "pass through" the router. How to configure VPN Passthrough? Solved: Unstable Internet on Zoom calls - NETGEAR Communities Restarting my router after having SIP ALG disabled (my QOS was already disabled) did the trick for me. I see 3 things that might conflict Zoom + Router; Zoom + Firewall; or Zoom + Firewall + Router. Also, if you use VPN to reach your company and then use your business Zoom account then 4th option is Zoom + Router + VPN. This is my simple

Jun 16, 2018

NAT ALG (Application Level Gateway) - NetworkLessons.com

Troubleshooting VPN passthrough for home routers | Answer

Nov 28, 2016 DISABLE SIP ALG ON FORTIGATE FIREWALLS - Vatacom Nov 19, 2018 Configure your Fortigate Firewall for use with the 3CX PBX Step 1: Disable SIP ALG. The SIP ALG functionality seems to be harder to disable (even if it is disabled via WEB Interface) and varies greatly between models. In addition, the type of NAT may break correct functionality or re-enable SIP ALG. On devices running FortiOs, you will need to disable this in multiple places as shown below: Linksys E-series routers - Intermedia Knowledge Base Mar 10, 2020