Regex separate IP:Port from a log - regex

Question

I have below simple regex expressions that works pretty well to split the given sample log. This would provides separate groups of object where I could access with $1 $2 $3 ... etc. I'm using this in Splunk.
Eg.
$1 = https
$2 = 2020-08-20T12:40:00.274478Z
$3 = app/my-aws-alb/e7538073dd1a6fd8
(.*?\s+)(.*?\s+)(.*?\s+)(.*?\s+?)(.*?\s+)(.*?\s+)(.*?\s+)(.*?\s+)(.*?\s+)(.*?\s+)(.*?\s+)(.*?\s+)(.*?\s+)(.*?\s+)(.*?\s+)(.*?\s+)(.*?\s+)(.*?\s+)(.*?\s+)(.*?\s+)(.*?\s+)(.*?\s+)(.*?\s+)(.*?\s+)(.*?\s+)(.*?\s+)(.*?\s+)(.*?\s+)(.*?\s+)(.*?\s+)
https 2020-08-20T12:40:00.274478Z app/my-aws-alb/e7538073dd1a6fd8 162.158.26.188:21098 172.0.51.37:80 0.000 0.004 0.000 405 405 974 424 "POST https://my-aws-alb-domain:443/api/ps/fpx/callback HTTP/1.1" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/32.0.2840.91 Safari/537.36" ECDHE-RSA-AES128-GCM-SHA256 TLSv1.2 arn:aws:elasticloadbalancing:ap-southeast-1:111111111111:targetgroup/my-aws-target-group/41dbd234b301e3d84 "Root=1-5f3e6f20-3fdasdsfffdsf" "api.mydomain.com" "arn:aws:acm:ap-southeast-1:11111111111:certificate/be4344424-a40f-416e-8434c-88a8a3b072f5" 0 2020-08-20T12:40:00.270000Z "forward" "-" "-" "172.0.51.37:80" "405" "-" "-"
The problem here is, I want to separate IP:Port into separate group. There are multiple places which have the IP:Port. Those I need as a separate group like other object.
Eg.
$4 = 162.158.26.188
$5 = 21098
$6 = 172.0.51.37
$7 = 80
Can anyone help on this? Thank you!

Answer 1

Here's a regex that will pull all of the ip:port values from a field:
| rex field=_raw max_match=0 "(?<ip_port>\d+\.\d+\.\d+\.\d+\:\d+)"
Now expand the ip_port field:
| mvexpand ip_port
And then extract from ip_port into ip & port:
| rex field=ip_port "(?<ip>\d+\.\d+\.\d+\.\d+\)\:(?<port>\d+)"