This site can run tests on your mail server and check for black listing SMTP operations, Open relays and more. Very useful for diagnostics and checking a SMTP mail server on the Intennet
Info from the site:
This test will list MX records for a domain in priority order. The MX lookup is done directly against the domain’s authoritative name server, so changes to MX Records should show up instantly. You can click Diagnostics , which will connect to the mail server, verify reverse DNS records, perform a simple Open Relay check and measure response time performance. You may also check each MX record (IP Address) against 147 DNS based blacklists . (Commonly called RBLs, DNSBLs)
How to use the “netsh advfirewall firewall” context instead of the “netsh firewall” context to control Windows Firewall behavior in Windows Server 2008 and in Windows Vista.
This doesn’t make sense why the netsh firewall commands have become more complex and heaps longer than before.
Anyway, this will no doubt help to find the new commands with 2008, Vista and Win7 onwards.
Another great video tip from Linux Journal, on the chattr utility to protect files, even from root!
This is very useful, see the Linux Journal Magazines website video below:
With WS2008 R2 you can use the Server Configuration tool (Sconfig.cmd) to configure and manage some common tasks such as IP Address, Server Name, Workgroup or Domain properties, Windows Update and more.
It’s a great utility to get things up and running quickly.
For more info see the MS Technet techsite page:
Was doing a Google search on IP Tables to limit the connections per IP and found this article at nixCraft:
Apache just released Apache2.2.15 check your version now!
[email protected]:~$ sudo apache2 -v
Check your distro’s details for their versions as well, Debian may include the Apache patches but report an older version etc.
Complete Data Protection For Your Virtual Machines according to VMware.
They say: Enable quick, simple and complete data protection for your virtual machines with VMware Data Recovery, a disk-based backup and recovery solution.
I need to look into this further, but it does sound interesting, web page details:
I had an issue with a Postfix mail system on my internal syslog servers and needed to flush the mail queue.
To flush the mail queue with Postfix you simply enter this command:
# postfix flush
Make sure nothing is there or see if something new is going through:
If you want to delete mail in the queue:
# postsuper -d ALL
man postfix for more!