Notes from sysadmin work. Yet another sysadm blog
Hey.
Recently I got a task: SIP/100 should accept two calls at the same time and if first line “busy” caller should hear “Operator busy. Please wait”.
I tried to solve that with queue but queue cant announce “OP busy” because it was not busy (2-nd line call).
So I solved that task in next way:
Continue reading “Asterisk Device state INUSE”Hey, just another config draft from me. In that article we will enable fail2ban jail for asterisk on UDP/5060 via iptables.
In /etc/sysconfig/iptables we should allow UDP/5060 for all (if you want to enable only for your subnet why you need fail2ban? Just allow 192.168.1.0/24 and don’t read that article).
Continue reading “Working fail2ban for Asterisk (security log)”Hey. I just tried to find out how to setup Ivacy on my android phone but not with OpenVPN or stock Ivacy app.
As we now strongswan app is more battery-friendly. So we should use strongswan. You hear? Use strongswan if its possible.
But googling not give me anything. I asked support and receive half of truth. But figure out the rest by myself. So lets go.
Hey. Guacamole – really good app that allow you to connect to PC in your net via RDP/SSH/Telnet/VNC. Lets install it.
yum install cairo-devel libjpeg-devel libpng-devel uuid-devel freerdp-devel pango-devel libssh2-devel libssh-dev tomcat libvncserver-devel libtelnet-devel tomcat-admin-webapps tomcat-webapps gcc terminus-fontsContinue reading “How to install guacamole 1.0.0 on Centos 7 box”
Ok. Short article. We already have Asterisk 16.1, lets update to 16.2
systemctl stop asterisk
cd /usr/src
wget http://downloads.asterisk.org/pub/telephony/asterisk/asterisk-16-current.tar.gz
tar -zxvf asterisk-16-current.tar.gz
cd asterisk-16.2.1/
./configure --with-pjproject-bundled --with-crypto --with-ssl=ssl --with-srtp --with-jansson-bundled
make menuselect #should find out how to save settings
make && make install && make config && ldconfig
chown asterisk.asterisk /var/run/asterisk &&
chown -R asterisk.asterisk /etc/asterisk &&
chown -R asterisk.asterisk /var/{lib,log,spool}/asterisk &&
chown -R asterisk.asterisk /usr/lib/asterisk
Installation requires: php <7. Just because or Chinese friends use mysql_ and not mysqli_ or PDO stuff.
cd /tmp wget http://118.142.51.162/update/goip_install-v1.25.tar.gz tar xvfz goip_install-v1.2* cd goip_install ./goip_install.shContinue reading “Installing goip sms server on Centos x64.”
Via redhat-upgrade-tool ?
A lot of articles. And a lot of comments that tool is broken. 🙁
Today from early morning I was called by my colleague who said that his centos6 box can’t boot after reboot. After grub screen centos show that error:
RAMDISK: incomplete write (6257 != 32768) write error Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) Pid: 1, comm: swapper not tainted %kernel_ver% #1 Call trace:
Let fix that.
Hey. I’m already has mariadb installed but it was 5.x version. Today actual version 10.3.x. Lets upgrade!
yum remove mariadb-server mariadb-libsContinue reading “Upgrading MariaDB on Centos7”
Ok. After fresh install of centos I usually make two commands first
yum remove posftix sendmail yum install ssmtp
So I just understand that root (and other users mail) I never receive! Lets fix it. Open /etc/aliases with you favorite nano and scroll to the bottom of the file
# Person who should get root's mail root: your@serviceemail.com
After that lets test
echo "test message" | mail root
Check your@serviceemail.com. Thats all!