I know that ports were opened in the firewall for 5060 and the recommended RTP ports. Once we switched from SIP back to PRI, all our problems disappeared.Ĭan anyone give me any idea of what to do to resolve this? I'm not familiar with Watch Guard firewalls. Subnet 2 can receive inbound external calls but cannot make outbound external calls. Twinned calls answered on a cell phone have no audio on subnet 1. Some calls in progress were reported to have dropped one side of the audio stream during the call. We have a Watchguard X750 that acts as our. I looked into this problem and it seems it is related to the firewall and NATing. With the PBX correctly configured, the line registers, can call out, and receive calls, but there is absolutely no audio on both ways. Sip trunks would go out of service intermittently for no more than 4 minutes, then return to service automatically. We bought a VOIP line in the intention to use it on our SIP gateway in the PBX. Inbound and outbound calls with 2 way audio worked on subnet 1. By the time we got on site, this was our list. We switched to SIP trunking this morning and everything worked.for about 10 minutes. Under these circumstances, all services and calls work perfectly with 0 issues. I don't know what type the 2nd building has. Users have desk phones and some are multi device twinning to a cell phone. System is hooked to a PRI circuit for trunking. This manual is based on Fireware XTM > v12.9. Firewall Checker only tests UDP Ports.Mitel 3300 on ver 8. This document describes the configuration of WatchGuard XTM devices for use with 3CX. You need to reconfigure the firewall and test again. If you see even one RED status, it means it is Fail.This is within the duration of the host setupįrom the Management Console, go to Dashboard then Firewall Checker.For provisioning, the default port is 5001 – TCP.Audio Ports Ranges from 9000 to 10999 – UDP.In few situations this is useful, but in most situations SIP ALG can cause problems using the service. This enables the starting of Web Meetings and notifications of waiting users in meeting room. SIP ALG (Application Layer Gateway) is a feature which is available on most WatchGuard® network security appliances and inspects VoIP traffic as it passes through and modifies the messages on-the-fly. Tunnel Port (both SIP & Audio traffic are combined)Ĭonfiguration for 3CX Client (3CX WebMeeting):. Inbound NAT Ports Required: (can only be changed within the installation process).SIP Port (can only be changed within the installation process)Ĭonfiguration for 3CX Clients, SBC and Bridges:.ALG – Application Layer Gateway (Firewall).The Protocol (SIP/SDP) defines the port.Doesn’t matter how much you turn off in that proxy, SIP-ALG is still active. Internal Source Port = External Source Port At least in version 2.7.2 and close, SIP-ALG is apparently (seen via live logs and behavior) active within a Watchguard, if you have a TCP-UDP proxy active.It allows incoming network traffic from uncontacted sources, that is required for.IPv6 Firewall Rules (ACL) is needed if used.It is required to allow connections to 3CX from:.It translates Public Address (IPv4) to Private IP Addresses (NAT/PAT).Informations on NAT (Network Address Translation) and Ports: A NAT router with a built-in SIP ALG can re-write information within the SIP messages (SIP headers and SDP body) making signaling and audio traffic between the client behind NAT and the SIP endpoint possible. Note: 3CX Support will NOT configure your firewall for you. There are settings that needs to be changed for Voice Calls and other features to work and connect to the 3CX server. Firewall configuration is a requirement for 3CX to work properly on the system.
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