Regular Expressions 101

^start of string

Non-Capturing Group(?:[^ \n]* ){5}

{5}repeats the group contents below exactly 5 times:

Negated Character Class[^ \n]*

*matches any number of characters outside the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

\na line-feed (newline) character (ASCII 10)

the literal (32₁₀ / 40₈ / 20₁₆)

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Group username(?P<username>\w+)

\w+any word character, repeated at least once

Non-Capturing Group(?:\].*\])

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

.*any character (except for line terminators), repeated any number of times

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

Group IP(?P<IP>[^:]+)

Negated Character Class[^:]+

+matches at least one character outside the set below:

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

^(?:[^ \n]* ){5}\[(?P<username>\w+)(?:\].*\])(?P<IP>[^:]+)

New

Oct 24 18:43:57 openvpn[36372]: 66.103.224.123:59349 [username] Peer Connection Initiated with [AF_INET]66.103.224.123:59349