There are many sites providing country blocklists, for example http://www.ip2location.com/free/visitor-blocker or https://www.countryipblocks.net/. When you want periodicaly update such list, you have problem. You need pay for that service for automated access, actual data or “hack” access to that service (abuse their free access conditions)…
Are you getting angry when installing Debian and your network cards (eg. bnx2) are not working because of missing non-free firmware policy? Solution is simple – just use for installation unofficial Debian iso images with firmware.Read More »Debian iso images with firmware included
Everyone know common dns blacklists used for rejecting emails. To check, if ip address is blacklisted on some blacklist, it is common to use service like mxtoobox.com. But what check next, if mxtoolbox shows ip is not blacklisted and email or connections are still rejected (sometimes without any reason) by some servers?
Read More »Commercial DNS (IP) blacklists
Openvpn-gui is well known openvpn installer package for Windows with small GUI program. Openvpn-gui main problem is that it require administrator privileges to run correctly. But there is alternative.
Read More »Still using openvpn-gui?
VMware vSphere cli requires many CPAN libraries. On Centos 6 I have enabled EPEL repository and installed packages:
Read More »Installing vSphere cli on Centos 6
There seems to be increased spam activity last few days. Both rejected connections and marked SPAM has increased on our systems.
Read More »Increased spam activity
IPSec implementation has been changed in recent Redhat Enterprise Linux (RHEL) from ipsec tools (used in RHEL 5) to openswan in RHEL 6. Configuration using ifcfg-ipsec interfaces doesn’t works any more. Obviously, same change applies for Centos.
Read More »Redhat Enterprise Linux 6 IPSec configuration example
I have been searching log time for tool which can convert HD Windows Media Center recordings (wtv format) to some playable format for Samsung TVs, which are unable to play WTV recordings. I want to do it without re-encoding original wtv file. Finally I have found great tool remuxTool (v1.2.5). It’s java application, it has gui or can be used in command line, which I prefer.
Read More »Convert HD wtv file to play on Samsung TV
Postfwd is Postfix firewall daemon. Read More »Fighting againts SPAM – postfwd
Conntrack tools allows manipulating linux connection tracking table. Command conntrack is useful for deleting conntrack entries, but it is not included by default in RHEL/Centos.
Read More »Install conntrack tools on Centos 5