Regex

[toolman]

If I wanted to block a ua in mod_rewrite like this:

RewriteCond %{HTTP_USER_AGENT} ^WebEMailExtrac.* [OR]

Except I want to block the ua "PingALink Monitoring Service 1.0" or "LinksManager"
can I just do this?

RewriteCond %{HTTP_USER_AGENT} ^Ping.* [OR]

[littleman]

RewriteCond %{HTTP_USER_AGENT} ^Ping [OR] Should do it. That will match anything that starts with "Ping". So it will get:
PingALink Monitoring Service 1.0
PingHead 2.1
Ping_you_to_hell 0.0.0.1
and so on...