http://www.astblog.com asterisk pbx and voip tricks and tips Thu, 08 Dec 2011 23:34:36 +0000 http://backend.userland.com/rss092 en Asterisk Project Security Advisory - AST-2011-013 Product Asterisk Summary Possible remote enumeration of SIP endpoints with differing NAT settings Nature of Advisory Unauthorized data disclosure Susceptibility Remote unauthenticated sessions Severity Minor Exploits Known Yes Reported On 2011-07-18 Reported By Ben ... http://www.astblog.com/2011/12/08/possible-remote-enumeration-ofsip-endpoints-with-differing-nat-settings/ If you want to make outbound calls, there is a new alternative in asterisk 1.8 to the old asterisk call files. You can now use the asterisk CLI command: channel originate There are two ways to use this command. A call can be originated between a channel and a specific application, or between ... http://www.astblog.com/2011/11/04/asterisk-18-outbound-dialing/ This is a quick tip to execute a linux shell command from asterisk shell. Just put an exclamation point (!) before your command : *CLI> !date Fri Nov  4 20:33:00 EDT 2011 http://www.astblog.com/2011/11/04/execute-linux-shell-command-from-asterisk-shell/ After setting up sip users or peers in sip.conf and making calls, you may wonder why asterisk either reject your call or send it to default context. When asterisk receive new sip session, here is how it tries to see which user or peer in sip.conf the call belongs to: 1. Asterisk ... http://www.astblog.com/2011/10/21/how-does-asterisk-match-sip-userspeers-in-sipconf/ Some times, you want your configuration file to be generate dynamicly from an external process for exemple. To do so, you can use the #exec directive in the configuration file. First, active execincludes in /etc/asterisk/asterisk.conf vim /etc/asterisk/asterisk.conf execincludes = yes Then in your configuration file add: #exec /usr/bin/config_generator.sh config_generator.sh can be written on any program and need ... http://www.astblog.com/2011/03/21/asterisk-dynamic-conf-files/ Today, in asterisk 1.6, we will see what the MixMonitor Application does and in which context you can use it. What may be usefull are: * MIXMONITOR_FILENAME variable will contain the full recording path at the end of the cmd * Option 'a': Can be use if the file you want to ... http://www.astblog.com/2011/02/01/asterisk-mixmonitor-cmd/ Another system another dahdi error. This time I'm under CentOS. After building dahdi as usual without problem, when I try to run service dahdi restart I get the following error after a lot of missed modules Error: missing /dev/dahdi! After a lot of research, I found out that I was using kernel-PAE by running `uname -r` ... http://www.astblog.com/2011/01/14/error-missing-devdahdi/ Sometimes, you may run into weird quality problems when having a digium card. This may include random drop calls, cuts in the calls etc ... This may have something to do with the IRQ sharing on your server. Please make sure that the digium card has it own dedicated IRQ interupt To do ... http://www.astblog.com/2010/12/23/dealing-with-irq-on-e1t1pri/ Since asterisk 1.4.X, you may notice that when building, it shows something like : [CC] app_dial.c -> app_dial.o Somes may want to see the asterisk full command and see what is being linked. To do so, run NOISY_BUILD=on make install http://www.astblog.com/2010/12/20/how-to-show-all-asterisk-command-during-build/ So, this maybe the first error you have when trying to build dahdi. On CentOS, to fix it, it is simple. First update yum yum update yum upgrade Know your kernel version uname -r Search the package kernel-devel right for your version and install it yum install kernel-devel kernel-headers Goto to /lib/modules/ directory cd /lib/modules/`uname -r` ls -l If you see a ... http://www.astblog.com/2010/07/17/you-do-not-appear-to-have-the-sources-for-the-uname-r-kernel-installed/