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Step 1: DNS: A Record
First we’ll need to log in to WHM. Under DNS Functions, select Edit DNS Zone. Choose the domain for the zone in which you wish to edit. Add an A record mapped to asterisk (wildcard) for the subdomain and the IP Address the site is hosted on. You likely already have [...]
This article will tell you how you can make a file or folder undeletable (immutable) even for root.
This is useful if you have an important file that you don’t want to delete by accident or if you are investigating some user’s files and you don’t want someone deleting the “evidence” while you investigate.
The command works [...]
As the summer is starting to show its heat waives (at least here) I thought that an article on how to monitor your server’s CPU temperature is appropriate. In a modern Data Center heat should not be a problem but you never know…
When you should start worrying about your CPU temperature?
When the first signs are [...]
Hello,
I just investigated a cpanel server that was showing two spamd processes that were using 100% of CPU time.
In case you see a similar problem on your server there is an easy fix released by cPanel, but before we go there please note that this is not a cPanel issue, but it’s a [...]
What is SPF?
Sender Policy Framework (SPF) is an attempt to control forged e-mail. SPF is not directly about stopping spam – junk email. It is about giving domain owners a way to say which mail sources are legitimate for their domain and which ones aren’t. While not all spam is forged, virtually [...]
3ware RAID cards are used by the majority of Data Centers (Layeredtech, Softlayer, etc.) so if you have a RAID card installed (which is always a good idea) you might have a 3ware card.
I don’t know if you know or not (many people don’t) but it’s your responsibility to monitor the RAID array. There will [...]
What is Rootkit Hunter ?
Rootkit scanner is scanning tool to ensure you for about 99.9%* you’re clean of nasty tools. This tool scans for rootkits, backdoors and local exploits by running tests like:
- MD5 hash compare
- Look for default files used by rootkits
- Wrong file permissions for binaries
- Look for suspected strings in LKM and [...]
Delivering mail to yahoo and google is so hard those days. Almost every server has had this problem even if it is not used to relay spam.
Installing DomainKeys can help your server deliver “clean” emails directly to your user’s inbox.
What are DomainKeys?
Well you will find more information on this topic at: http://antispam.yahoo.com/domainkeys
Installation is simple and [...]
Installing and running cPanel 11 require you to have perl v5.8.8. If you run an older version some things will not work properly (like spamassasin for example).
Do you need to upgrade?
YES if you running an older version.
How to check what version are you using?
Run:
perl -v
If you see anything like:
This is perl, v5.8.7 built for i686-linux
then [...]
What is chkrootkit?
chkrootkit is a tool to locally check for signs of a rootkit. It
contains:
* chkrootkit: a shell script that checks system binaries for
rootkit modification.
* ifpromisc.c: checks if the network interface is in promiscuous
mode.
* chklastlog.c: checks for lastlog deletions.
* chkwtmp.c: checks for wtmp deletions.
* check_wtmpx.c: checks for wtmpx deletions. (Solaris only)
* chkproc.c: checks [...]
