Links

This is a linklist to several useful sites.

Sysadmin-Related

DNS

• dnsstuff - dns diagnoostic tools
• whatsmydns - check dns propagation
• checkdnspropagation

Internet Utilities

• centralops
• internettrafficreport
• internetpulse
• traceroute
• looking-glasses
• whois
• ip-analyzer - checks dns info, shows owner, list blacklist-info and running services

Mail

• mxtoolbox
• exrca
• multirbl

• [emailsecuritygrader][] - runs checks against mail setup and gives advice