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--- routersthatshouldnotbeused [2022/06/01 18:15] – jim
+++ routersthatshouldnotbeused [2024/07/17 14:55] (current) – jim
@@ Line 3: / Line 3: @@
 ====Routers That Should Not Be Used====
+**Most Cellular Modems and Modem routers will not work!!!!**\\
+For //**Business Class T-Mobile**// subscribers, we have confirmed that using an Inseego FX3100 router will allow service to work over Cellular.\\
+//T-Mobile's regular router that they give out WILL NOT work.//
+\\
+\\
+**Mesh Routers -** Mesh routers are great for lots of things, but VOIP is absolutely not one of them.  Mesh systems MUST be used in Access Point Mode with a traditional router or they will not work.
 **Comcast home version with wireless -** have them change to Comcast business version. The home version with wireless gets used by Comcast to also support their open Wi-Fi network (Hotspot) and this can lead to overutilization and voice quality issues. It is reported that it can be disabled, instructions are here [[http://bgr.com/2014/06/11/how-to-disable-comcast-xfinity-wi-fi-hotspot/]].    If this does not work then a call to Comcast customer service is needed.
+**Comcast CBR-T Modem Router -** This unit will not work out of the box and will not work as a DHCP router.  In order to use this device, Comcast must place the unit in IP Pass-through mode, and disable:\\
+(sp)(sp)(sp)1. Firewalls\\
+(sp)(sp)(sp)2. WiFi Antennas\\
+(sp)(sp)(sp)3. DHCP\\
 **Motorola SBG-650 -** (used by Time Warner). The problem with this one is that under high load, it starts buffering (or even freezing) packet output and it doesn't seem to be a way to set QOS to still allow RTP so it will end up with voice quality issues.
@@ Line 44: / Line 56: @@
 **Netgear - WGR614v9 Wireless-G Router, DGN2000 Wireless-N ADSL2+ Modem Router**
-     Firmware V1.0.18_8.0.9NA
+Firmware V1.0.18_8.0.9NA
-        To disable SIP ALG: From Wan Setup Menu, NAT Filtering, uncheck the box next to "Disable SIP ALG"
+To disable SIP ALG: From Wan Setup Menu, NAT Filtering, uncheck the box next to "Disable SIP ALG"
 **SMC -** ToDo- NAT type: No symmetrical
-     Issues:
+Issues:
-     The ALG doesn't replace the private address in "Call-ID" header (that is correct) but it does replace the "call-id" value in "Refer-To" header so SIP transfer is broken.
+The ALG doesn't replace the private address in "Call-ID" header (that is correct) but it does replace the "call-id" value in "Refer-To" header so SIP transfer is broken.
-        To disable SIP ALG: ToDo no ALG related options found via web and telnet. No idea of how to disable it.
+To disable SIP ALG: No idea of how to disable it.
 **Linksys - WRV200, WRT610N -** NAT type: Symmetrical
-     Issues:
+Issues:
-     The ALG replaces the private address in "Call-ID" header (not needed at all). Some phones (as Linksys with the latest firmware) encode the "Call-ID" value in the "Refer-To" header (by escaping the dots) so the private IP appearing there is not replaced with the public IP. This causes that the call transfer fails since the proxy/PBX/endpoint will not recognize the dialog info.
+The ALG replaces the private address in "Call-ID" header (not needed at all). Some phones (as Linksys with the latest firmware) encode the "Call-ID" value in the "Refer-To" header (by escaping the dots) so the private IP appearing there is not replaced with the public IP. This causes that the call transfer fails since the proxy/PBX/endpoint will not recognize the dialog info.
-       To disable SIP ALG on WRV200; no ALG related options found via web and telnet. No idea of how to disable it.
+To disable SIP ALG on WRV200; no ALG related options found via web and telnet. No idea of how to disable it.
-       To disable SIP ALG on WRT610N: Web Interface: Administration, Management, underside heading 'Advanced Features' SIP ALG, can be disabled.
+To disable SIP ALG on WRT610N: Web Interface: Administration, Management, underside heading 'Advanced Features' SIP ALG, can be disabled.
 **Fortinet -** All models come with SIP Helper enabled by default
-       To disable SIP helper (v6.2 and up):
+To disable SIP helper (v6.2 and up):\\
-       config system settings
+config system settings\\
-       set default-voip-alg-mode kernel-helper based
+set default-voip-alg-mode kernel-helper based\\
-       end
+end\\
-       config system session-helper
+config system session-helper\\
-       delete 13
+delete 13\\
-       end
+end\\
-       NOTE: The section below clears any currently active sessions, if you’re applying the new settings live it prevents needing to reboot
+NOTE: The section below clears any currently active sessions, if you’re applying the new settings live it prevents needing to reboot\\
-       di sys session filter dport 5060
+di sys session filter dport 5060\\
-       di sys session clear
+di sys session clear\\
-       di sys session filter clear
+di sys session filter clear\\
-       di sys session filter sport 5060
+di sys session filter sport 5060\\
-       di sys session clear
+di sys session clear\\
-       To disable SIP helper (lower than v6.2):
+To disable SIP helper (lower than v6.2):\\
-       ~# telnet firewall
+~# telnet firewall\\
-       config system settings
+config system settings\\
-       set sip-helper disable
+set sip-helper disable\\
-       set sip-nat-trace disable
+set sip-nat-trace disable\\
-       end
+end\\
-       config system session-helper
+config system session-helper\\
-       show <---- use this to find out which entry is configured for typically 12 or 13
+show <---- use this to find out which entry is configured for typically 12 or 13\\
-       delete 12
+delete 12\\
-       end
+end\\
-       For SIP Trunks
+For SIP Trunks\\
-       If using Virtual IPs under objects make sure to turn OFF NAT within each IPv4 rule for VoIP. If not using Virtual IPs under objects make sure to turn ON NAT under each IPv4 rule for VoIP.
+If using Virtual IPs under objects make sure to turn OFF NAT within each IPv4 rule for VoIP. If not using Virtual IPs under objects make sure to turn ON NAT under each IPv4 rule for VoIP.\\
-       The preferred solution is to configure the SIP ALG. Policies that use the SIP ALG will not use SIP helper. Full documentation at [[http://docs.fortinet.com]] then pick FortiOS for the version on your device, then VoIP solutions: SIP.
+The preferred solution is to configure the SIP ALG. Policies that use the SIP ALG will not use SIP helper.\\
+Full documentation at [[http://docs.fortinet.com]] then pick FortiOS for the version on your device, then VoIP solutions: SIP.\\
-**Cisco - 800 series -** To disable the NAT services for SIP in IOS, just run these commands:
+**Cisco - 800 series -**
-      no ip nat service sip tcp port 5060
+To disable the NAT services for SIP in IOS, just run these commands:
-      no ip nat service sip udp port 5060
+no ip nat service sip tcp port 5060
+no ip nat service sip udp port 5060
 **Juniper/Netscreen - SSG Series -**
-      To disable SIP ALG:
+To disable SIP ALG:
-      In the Web interface: Security -> ALG
+In the Web interface: Security -> ALG
 **Asus RT-AC66U -** with their most current firmware enables their SIP ALG by default.
@@ Line 128: / Line 142: @@
 **Verizon FiOS G1100 & G3100 -** This modem has SIP ALG enabled by default and Verizon has not provided a method to disable this feature. Verizon has also not released if it can be disabled by Verizon itself. The best recommendation at this time is not to use this modem. White page link  [[https://hosting.intermedia.net/support/kb/default.asp?id=3343]].
+originally published by: [[https://voipdocs.io/en/articles/246-routers-with-known-issues]]