This guide is going to tell you how to use Telnet (a text based protocol that allows you to connect to a remote device over the Internet) through command prompt, though there are programs such as Secure CRT that you can use for this.
Step 1
On your PC go to “Start” and select “Run” and ype in “cmd” and click “OK”.
Step 2
When command prompt loads up type in “Telnet IP address of your router ” and hit enter. This will then load up the Telnet console.
Check under “System Maintenance – Management that the telnet port is enabled and what the port number is on your router.
If you are doing it on the internal network this will be your Default Gateway in IP Config, if it is externally, you’ll need to ask your customer to go to Google and type in “Whats my IP”. More information can be found at About.com.
Step 3
Enter your administrators log in when asked for “Account” and then the password is the password of the router.
Step 4
Type in the following commands:
connection unbind application=SIP port=5060
saveall
Switch off SIP ALG in the GUI #
From the router’s homepage, click on “WAN Services”
From here, click on “Settings” and scroll down to “NAT Helpers (ALG’s)”
SIP ALG can be easily enabled or disabled here depending on your set up.
