I need to give Asterisk access to my external IP address to prevent
the NAT problem where caller cannot hear the callee's voice.
According to Asterisk - The Future of Telephony page 92 Environment
Variables:
"Environment variables are a way of accessing Unix environment
variables from within Asterisk. They are referenced in the form of
${ENV{var}}
where var is the Unix environment variable you wish to reference."
My external IP is placed each night in a file call /etc/myip and placed
in the $MYIP variable by /etc/bashrc when an shell is loaded.
So I have /etc/myip refreshed each night in a cron job
and when a shell is opened /etc/bashrc does:
export MYIP=`cat /etc/myip`
To access the variable in sip.conf I have tried:
externip=${ENV(EXTERNIP)}
and
${ENV($EXTERNIP)}
but neither seems to work.
Is this the correct syntax? Did I misinterpret the book?
I say neither seems to work because When I hard code
externip=69.91.84.176
there are no NAT problems but when I try to access the $MYIP variable
either of the ways above NAT prevents me hearing the callee's voice.
I have tried but not found a way to directly access the contents of MYIP
to the console using the CLI. Is there a way to see or set _any_ Linux
enviromnent variable using the CLI? More generally, how do I access the
Linux shell from the CLI?
The problem with simply using
externip=69.91.94.176
is that number is subject to change and I don't know an easy way to
automatically write the value into sip.conf programatically.
I could have just said "how do I do this" but wanted to show that I've
done my homework.
Thanks for any help.
Larry
--
Larry Alkoff N2LA - Austin TX
Using Thunderbird on Linux
_______________________________________________
--Bandwidth and Colocation provided by Easynews.com --
asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
http://lists.digium.com/mailman/listinfo/asterisk-users
