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--- disablesipalg [2022/06/01 18:50] – created jim
+++ disablesipalg [2022/06/01 18:59] – jim
@@ Line 25: / Line 25: @@
 ciscohost(config)# no ip nat service sip udp port 5060\\
 ciscohost(config)# do show run | inc nat service sip\\
-{{ :cisco-router-config_480x148.jpg?nolink&600 |}}
+{{ :cisco-router-config_480x148.jpg?nolink |}}
                                     Figure 1: Disabling SIP Inspection on a Cisco Router
@@ Line 63: / Line 63: @@
 From the main menu, find the "VoIP" option that usually appears on the left menu. While in the menu, uncheck the box for SIP - it often appears as "SIP Transformations" and then select the option to "Enable Consistent NAT". Accept the settings and reboot if prompted. Figure 2 shows an example of the SonicWall user interface on the page where these settings exist.
-{{ :sonicwall-sip-alg_480x446.jpg?nolink&600 |}}
+{{ :sonicwall-sip-alg_480x446.jpg?nolink |}}
                                     Figure 2: Disabling SIP ALG on a SonicWall Router
 Understand that although this method seems quite generalized, it is the basis for disabling SIP intervention on most SonicWall systems.
-Netgear
+**Netgear**
 Netgear has several different interfaces. As this brand is one of the most popular for home and small business networking, variation in interfaces is common due to the large number of devices made by the company. However, the following example should provide a good reference for the more common models and show you how to disable SIP ALG on your Netgear router.
@@ Line 78: / Line 79: @@
 Most models have a check-box reading something similar to "Disable SIP ALG" in figure 3 below. Check the box, apply the settings and reboot if prompted.
+{{ :netgear-sip-alg-disable.jpg?nolink |}}
+                                    Figure 3: Disabling SIP ALG on a SonicWall Router
-Figure 3: Disabling SIP ALG on a SonicWall Router
+**D-Link**
-D-Link
 Like Netgear, D-Link has a variety of different interfaces but the methodology for disabling this setting is very similar for most models. Many models are equipped with a powerful set of firewall tools so several steps must be completed to ensure SIP traffic passes beyond the device.
-Open a browser and enter the router's IP address in the address bar. Go to "Firewall Settings" under the "Advanced" item.
+Open a browser and enter the router's IP address in the address bar. Go to **"Firewall Settings"** under the **"Advanced"** item.
-Uncheck the box to disable SPI - usually, directly below this item are options for "NAT Endpoint Filtering" that must be changed to "Endpoint Independent" for both TCP and UDP.
+Uncheck the box to disable SPI - usually, directly below this item are options for **"NAT Endpoint Filtering"** that must be changed to **"Endpoint Independent"** for both TCP and UDP.
-Next, find the "Application Level Gateway (ALG) Configuration" area and uncheck the box for SIP.
+Next, find the **"Application Level Gateway (ALG) Configuration"** area and uncheck the box for SIP.
 Save these settings and reboot the device if requested. Figure 4 below shows additional details on how to configure this setting:
+{{ :dlink-sip-alg_480x627.jpg?nolink |}}
-Figure 4: Disabling SIP ALG on a D-Link Router
+                                    Figure 4: Disabling SIP ALG on a D-Link Router
 AT&T (2WIRE)