> SetEnvIf Remote_Addr !^10\. HOSTNAME=foo.bar.com > Header add X-Server-Name "%{HOSTNAME}e" > but negation of network didn't work, I have also tried: > SetEnvIf Remote_Addr [^(10\.)] HOSTNAME=foo.bar.com > but it didn't worked either. > Has anyone used negation in SetEnvIf Remote_Addr ? > Documentation says: > Syntax: SetEnvIf attribute regex [!]env-variable[=value] > [[!]env-variable[=value]] ... > so why any of those regex's doesn't work? Apache 2.0 and later uses PCRE, and neither of those expressions mean what you're describing. SetEnvIf itself doesn't negate the result of the regex match with a flag. I don't fully understand your logic, but If you want your SetEnvIf to only take action when the remote address doesn't begin with "10.", try something like: ^((?!10\.).+) -- Eric Covener covener@xxxxxxxxx --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx