As stated in the original post, when I entter the IP
with an editor
directly into sip.conf calls work just fine but I am
looking for a way
to have that done _automatically_.
The Asterisk - Future of Telephony book says it is
possible for Asterisk
to access a Linux environment variable containing
the IP information in
the form of "${ENV{variable}}.
It doesn't seem to work. I am asking how to make it
work.
Larry
Watkins, Bradley wrote:
If you already have the IP in a file, why don't
you set it up so the
file itself says: externip=xx.xx.xx.xx and then
do a #include in
sip.conf for the /etc/myip file? I believe you'll
have to do a sip
reload either way (which can obviously be part of
your cron job) if
you're not already, but that should do what you're
looking to do.
- Brad
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]
On Behalf Of Larry
Alkoff
Sent: Tuesday, August 22, 2006 9:34 PM
To: Asterisk-users; Austin-asterisk-users
Subject: [asterisk-users] How to set externip in
sip.conf automatically?
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
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