Regular Expressions 101

^start of line

Non-Capturing Group(?:.*?(\d+(?:[.]\d+){3}(?:/\d+)?)){2}

{2}repeats the group contents below exactly 2 times:

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

Group 1(\d+(?:[.]\d+){3}(?:/\d+)?)

\d+a Unicode decimal digit, repeated at least once

Non-Capturing Group(?:[.]\d+){3}

{3}repeats the group contents below exactly 3 times:

Character Class[.]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a Unicode decimal digit, repeated at least once

Non-Capturing Group(?:/\d+)?

?repeats the group contents below at most once:

/the literal / (47₁₀ / 57₈ / 2F₁₆)

\d+a Unicode decimal digit, repeated at least once

Global pattern flags

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

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

^(?:.*?(\d+(?:[.]\d+){3}(?:/\d+)?)){2}

New

Deny tcp src dmz:77.77.77.7/61112 dst dmz:55.55.56.57/139 by access-group "outside_access_in" [0x8b3ecfdc, 0x0]