Amit's Blog

> if (isset($_POST[‘submit’]) ) { foreach($_POST as $key=>$value) { $$key = $value; }

Open httpd.conf and set AllowOverride All restart apache web server and create a .htaccess file on the directory you want to block by ip : order deny,allowallow from x.y.z.a deny from all

Sync Files or folders to a remote host from local host : Rsync Syntax : #rsync options source destination -v, --verbose increase verbosity -q, --quiet decrease verbosity -c, --checksum always checksum -a, --archive archive mode. It is a quick way of saying you want recursion and want to preserve everything. -r, --recursive

> !/bin/sh Alert Email Address ALERT_EMAIL=”email address” ALERT_LEVEL=10 NO_MONITOR=”/dev/shm” #use pipe to separate multiple function calculate_usage() { while read raw_input; do used_space=$(echo $raw_input | awk ‘{ print $1}’ | cut -d’%’ -f1) partition=$(echo $raw_input | awk ‘{print $2}’) if [ $used_

** DSN: Service unavailable** RESOLUTION: set hostname other than localhost -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Relay host : open /etc/mail/sendmail.mc  and configure SMART HOST to your relay and remove the dnl at the front. vi /etc/mail/sendmail.mc dnl define(SMART_HOST', relayserver.domain.com')dnl make it look

dd if=/dev/cdrom of=~/cdrom_image.iso or mkisofs -o /tmp/cd.iso /tmp/directory

> rasterisk -x ‘database show’|grep -r “^/CF”

> 1. conf t 2. ip access-list {standard | extended} access-list-name 3. sequence-number acl 4. ip access-list resequence access-list-name starting-sequence-number increment eg. ip access-list resequence 111 100 15

Setting default group permission on a directory Set recursive sticky bit for the group on dir > chmod -R g+s /path/to/dir Recursively set group ownership of the directory > chown -R user:group /path/to/dir

**IP baseed Authentication in Kamailio for Peers. ** > route[PEER]{ if (allow_trusted("$si","$(proto)")) { xlog("L_INFO","\n\n–Trusted IP – $si – $proto"); record_route(); route(LCR); }; if (allow_address("1", "$si", "$sp")) { xlog("

**MySQL View to simplify Kamailio LCR Tables ** > create view openser.nt_dialplan As SELECT t.rule_id,r.lcr_id,prefix,from_uri,stopper,enabled,gw_id,priority,weight FROM lcr_rule r, lcr_rule_target t WHERE r.id = t.rule_id

1. Install rtpproxy : > `http://b2bua.org/chrome/site/rtpproxy-1.2.1.tar.gz``` > tar -zxvf rtpproxy-1.2.1.tar.gz<br></br> cd rtpproxy-1.2.1<br></br> ./configure<br></br> make<br><

Follow the tutorial here to implement LCR with kamailio : 1. Add lcr.so to load module loadmodule lcr.so 2. Add required parameters to the module modparam(“lcr”,”db_url”,DBURL) modparam(“lcr”, “gw_uri_avp”, “$avp(i:709)”) modparam(“lcr”, “ruri_user_avp”, “$avp(i:500)”) modparam(“lcr”, “flags_

If you need to install additional modules you might need after you install kamailio : 1. cd /usr/local/src/kamailio-3.1.1 2.make FLAVOUR=kamailio cfg 3.make install-modules modules=modules/lcr Assuming that lcr is the module that you want to install additionally.

You can use ngrep to diagnose your sip or other network activity : Dependency : libpcap-devel yum install libpcap-devel Download ngrep [http://downloads.sourceforge.net/project/ngrep/ngrep/1.45/ngrep-1.45.tar.bz2?r=http%3A%2F%2Fngrep.sourceforge.net%2Fdownload.html&ts=1296767443&use_mirror=voxel] wget http:

<strong>Dependencies :</strong><br></br> Yum install bison pcre-devel libpcap-devel``` **Installation :** 1. Go to /usr/local/src/ 2. Download The latest version of kamailio 3.1.2 from source : [Download Latest Kamailio Source Here](http://www.kamailio.org/pub/kamailio/latest/src/

Reset Mysql Root Password 1. Kill the mysql daemon by loggin in as root 2. Start mysql in safe mode : mysqld_safe --skip-grant-tables 3. SSH using another session or login to another terminal<br></br> 4. Connect to mysql without password, you should be able to

If you want to display a line, that does not begin with a pattern you can use grep to achieve that. It is specially useful when you want to view the lines that are not commented in a configuration file. grep -v “^;” ( This will display lines that dont start with

Sync the Time once a day at 2.00 `0 2 * * * /usr/sbin/ntpdate -s -b -p 8 -u``` or 0 2 * * * /usr/sbin/ntpdate -s -b -p 8 -u 0.us.pool.ntp.org