Monthly Archives: August 2017

FFmpeg: decrease size of mp4 file

bschelst/ August 9, 2017/ Linux/ 0 comments

With ffmpeg you can also decrease the size (aka: quality) of a mp4 file on linux command line.You can use the following example, which will generate a +/- 5Mb file :

Denyhosts: Add IP to whitelist

bschelst/ August 7, 2017/ Linux/ 0 comments

Create a file ‘allowed-hosts’ in the ‘work_dir’ (can be found in the denyhosts.conf file), which is /var/lib/denyhosts on Ubuntu, containing the ip.See the example below:

Fail2ban: unblock an ip

bschelst/ August 7, 2017/ Linux/ 0 comments

Find IP Address to Unblock Log in to your server via SSH and type in the following command: iptables -L -n Look for the IP address you want to unblock / unban. Now we must find the jail name this IP address is in. To do so, type the following: fail2ban-client status unban the IP: fail2ban-client set ssh unbanip 192.168.1.1

Fail2ban: whitelist an ip

bschelst/ August 7, 2017/ Linux/ 0 comments

First, edit the config file : vi /etc/fail2ban/jail.conf Then, check the line : ignoreip = Add now add all ip you want. Each IP or range IP must be placed here with a space. Ex: 192.168.0.1 192.168.5.0/32 Save. And restart Fail2Ban: service fail2ban restart

HAProxy: redirect http traffic to https

bschelst/ August 4, 2017/ Linux/ 0 comments

Within HAProxy it is possible to redirect all http traffic to https.It is sufficient to add the following rule within the frontend section: frontend incoming80 bind 10.1.1.13:80 redirect scheme https if !{ ssl_fc }

HAProxy: configure transparent proxy

bschelst/ August 4, 2017/ Linux/ 0 comments

If you configure HAProxy by default, the backends will receive the IP address of the HAProxy as incoming IP address. Some applications (or people) don’t want that. It is possible to configure haproxy as transparent proxy, so that the IP of the client is being used. First of all you need to ensure that you have a Linux kernel with

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