Regular Expression to match IP address from SNMP walk output

Question

The output of my snmpwalk looks like this:

iso.3.6.1.2.1.4.20.1.2.10.0.1.2

The last four digits (in bold) are always an IP address. I cannot seem to create a regex that will give me just the IP address, ie 10.0.1.2

Any help is greatly appreciated! I suck at regex so if an explanation could be included, that would really help.

Please show what you've tried, we're not here to do your work for you. — Barmar, Dec 10 '13 at 06:36
I started with this which ends up giving me just the last digit. /.([^.]+)$/ — cellis, Dec 10 '13 at 06:39
Sorry, the ** were an attempt to bold the text I am looking for. They are not actually part of the snmp output. — cellis, Dec 10 '13 at 06:40

score 2 · Answer 1 · edited May 23 '17 at 12:21

2

You can use match your ip address by regex

MatchIpAddressRegex = "^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$";

edited May 23 '17 at 12:21

Community

answered Dec 10 '13 at 06:48

Vignesh Kumar A

score 1 · Accepted Answer · answered Dec 10 '13 at 06:41

1

You can just repeat it four times:

/(\d+\.\d+\.\d+\.\d+)$/

or shorter:

/(\d+(\.\d+){3})$/

See how it performs at Regex101

answered Dec 10 '13 at 06:41

justhalf

+1 simple = best. I would not even show the long version. – Bohemian Dec 10 '13 at 08:10

2 Answers2