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ipgrep

IPv4/IPv6 CIDR netmask aware file pattern searcher. Searches lines from log files by IP address or CIDR mask. Can also match an IP address search term against firewall configuration with netmasks.

$ ipgrep 4.3.2.1 example.conf
allow all from 4.3.2.1m255.255.255.0
deny from 4.3.2.1m31

Go

Supported formats:

  • 1.2.3.4 (plain IPv4)
  • 1.2.3.4/24 (IPv4 CIDR)
  • 1.2.3.4m24 (IPv4 m notation)
  • 1.2.3.4m255.255.255.0 (IPv4 m mask)
  • 2001:db8::1 (plain IPv6)
  • 2001:db8::1/64 (IPv6 CIDR)

Installing

$ go get github.com/joneskoo/ipgrep/...