Working fail2ban for Asterisk (security log)

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 and don’t read that article).

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Ivacy VPN strongswan settings for android (and may be iOS)

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.

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How to install guacamole 1.0.0 on Centos 7 box

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-fonts
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How to update Asterisk 16.1 to 16.2

Ok. Short article. We already have Asterisk 16.1, lets update to 16.2

systemctl stop asterisk
cd /usr/src
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

RAMDISK: incomplete write, kernel panic on centos

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.

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About root mail

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

After that lets test

echo "test message" | mail root

Check Thats all!