IP Blacklisting
In the event you find that an IP address you manage or access the Internet from is blacklisted, DNSBL can be a big help in quickly identifying who’s blacklisted you...
Merry Christmas!
Merry Christmas to all of you! Sorry for the lack of posts recently. Between work, travel and end of year projects I’ve been busy. I’m hoping to complete a WP...
How to tell if a server support TLS for secure email transmission
TLS (Transport Layer Security) is the mechanism by which two email servers, when communicating, can automatically negotiate an encrypted channel between them so that the emails transmitted are secured from...
Apple Boot Camp: Windows XP displays “Disk Error” message during initial setup
Symptoms If you attempt to install Microsoft Windows XP without first formatting a partition using the Windows installer, this message may appear in Windows XP: “Press any key to boot...
EtherChannel between a Cisco switch and a Dell PowerEdge server
Problem: My production Dell PowerEdge file server has a single Broadcom Gigabit connection to a Cisco Catalyst 3750 switch on the internal network. I’m seeing average through put of around...