exim: error while loading shared libraries: libperl.so: wrong ELF class: ELFCLASS32

0
1 year ago
by dennis in , ,

So I ran into a very odd issue with a server today where exim would not start after a CentOS upgrade. The error message was such:

exim: error while loading shared libraries: libperl.so: wrong ELF class: ELFCLASS32

This error took awhile to google around for and I couldn’t find any relevant articles. The problem seemed to obviously be the libperl.so file but perl seemed fine and the file was identical to other server setups with the same version of perl, exim, cPanel, CentOS. I decided to try and rebuild exim with /scripts/eximup –force but that did nothing to help the situation. Eventually, I found the following command:

/scripts/eximup --source

To the best of my knowledge I gained from my research, this recompiles exim from source, converts to an rpm, then installs that. Sure enough, that fixed the issue and exim was running again with no issues. I figured I’d make this post due to the fact I couldn’t find one post with the information I needed.

Simple IPTables OpenVZ Setup

1
1 year ago
by dennis in , ,

So after looking and failing to find a good article on how to describe the simple process to set up IPTables on an OpenVZ server, I figured I would write one here. The process is incredibly simple and can be broken down into 3 steps:

  1. Empty out the contents of /etc/sysconfig/iptables 
    cat "" > /etc/sysconfig/iptables
  2. Use the following line in /etc/sysconfig/iptables-config: 
    IPTABLES_MODULES="ipt_REJECT ipt_tos ipt_TOS ipt_LOG ip_conntrack ipt_limit ipt_multiport iptable_filter iptable_mangle ipt_TCPMSS ipt_tcpmss ipt_ttl ipt_length ipt_state iptable_nat ip_nat_ftp"
  3. Use the following line in /etc/vz/vz.conf: 
    IPTABLES="ipt_REJECT ipt_tos ipt_limit ipt_multiport iptable_filter iptable_mangle ipt_TCPMSS ipt_tcpmss ipt_ttl ipt_length ipt_state"

After ensuring these three things, just stop both vz and iptables, start iptables, then start vz. You should then be able to use iptables within a virtualized container.

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