regex101: ESET Push Notification Service domains (DNS)

^start of line

Group 1(h[1,3,5]-)?

?repeats the group contents below at most once:

hthe literal h (104₁₀ / 150₈ / 68₁₆) (case insensitive)

Character Class[1,3,5]

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

3the literal 3 (51₁₀ / 63₈ / 33₁₆)

5the literal 5 (53₁₀ / 65₈ / 35₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

epnsthe literal text epns (case insensitive)

Condition(?(1)broker0[1-7])

Uses the first branch if group 1 matched

If the condition is true, match this branch:broker0[1-7]

broker0the literal text broker0 (case insensitive)

Character Class[1-7]

1-7one character from 1 (49₁₀) to 7 (55₁₀)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

esetthe literal text eset (case insensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

comthe literal text com (case insensitive)

$end of line

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

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

Search reference

Regular Expression

^(h[1,3,5]-)?epns(?(1)broker0[1-7])\.eset\.com$

New

epns.eset.com

h1-epnsbroker01.eset.com
h1-epnsbroker02.eset.com
h1-epnsbroker03.eset.com
h1-epnsbroker04.eset.com
h1-epnsbroker05.eset.com
h1-epnsbroker06.eset.com
h1-epnsbroker07.eset.com

h3-epnsbroker01.eset.com
h3-epnsbroker02.eset.com
h3-epnsbroker03.eset.com
h3-epnsbroker04.eset.com
h3-epnsbroker05.eset.com
h3-epnsbroker06.eset.com
h3-epnsbroker07.eset.com

h5-epnsbroker01.eset.com
h5-epnsbroker02.eset.com
h5-epnsbroker03.eset.com
h5-epnsbroker04.eset.com
h5-epnsbroker05.eset.com
h5-epnsbroker06.eset.com
h5-epnsbroker07.eset.com

Regular Expressions 101

Regular Expression

Extraction