Category: linux

OpenVPN on 443

October 4, 2023 Emil C
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SSL VPN? Lately I’ve been working on a project where security is very important. In order to connect to the hosting provider I needed to use a specific VPN provided by FortiNet. What’s interesting about this VPN solution is that apparently it uses HTTPS. this gave me the idea to…
linux security

Removing old kernels

August 6, 2014 Emil C
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On Debian/Ubuntu we would need to search for installed kernel packages, something like this: root@server:~# dpkg --list |grep linux-image ii  linux-image-3.2.0-23-generic         3.2.0-23.36                                      Linux kernel image for version 3.2.0 on 64 bit x86 SMP ii  linux-image-3.2.0-56-generic         3.2.0-56.86                                      Linux kernel image for version 3.2.0 on 64 bit x86 SMP ii  linux-image-3.2.0-57-generic         3.2.0-57.87                                     …
linux

RHEL (CentOS) – changing Apache’s MPMs

July 20, 2014 Emil C
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Well, in EL6 when we wanted to change Apache’s MPMs we would edit /etc/sysconfig/httpd and set the HTTPD variable with the binary needed.It looks something like: HTTPD=/usr/sbin/httpd.worker To see the available options we could type the following command: [root@server ~]# ls  /usr/sbin/httpd* /usr/sbin/httpd  /usr/sbin/httpd.event  /usr/sbin/httpd.worker The simple httpd binary uses…
linux

Centos7 – reversing to classic iptables

July 16, 2014 Emil C
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First of all we need to deactivate FirewallD systemctl disable firewalld.service Then we install the package called iptables-services yum install iptables-services edit /etc/sysconfig/iptables then start classic iptables and make it load on each reboot systemctl start iptables.service systemctl enable iptables
linux

Testing CentOS 7 – Lots have changed

July 10, 2014 Emil C
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So, just installed the newly launched CentOS 7 and oh boy! Lot’s have changed.Honestly I don’t know if it’s for the good or bad. As I observed the distro moves really fast, and it starts reeeeallly fast! The first notable change is that the default filesystem changed to XFS. Therefore…
linux