ipv6calc will do some format changes and calculations for you
beside this it is able to display information and filter

(P) & (C) 2001-2025 by Peter Bieringer <pb (at) bieringer.de>
                   published under GNU GPLv2

For suggestions and bug report please contact author

More help is available using 'ipv6calc -?'


Intention:
* This utility can be used by the IPv6 enabled initscripts for better duplicate
address detection on setup of IPv6 addresses

* Also migrate "ip6_int" of Keith Owens <[email protected]> into this utility


Known bugs:
* ipv6calc is sure not the securest C program around the world


Contents:
* "ipv6calc": the main utility
* "ipv6calcweb": CGI wrapper for ipv6calc's address information output
* "ipv6logconv": log converter (IPv4/IPv6)
* "ipv6loganon": log anonymizer (IPv4/IPv6)
* "ipv6logstats": log statistic generator (IPv4/IPv6)
* "mod_ipv6calc": Apache module


Included internal databases:
* IEEE IAB, OUI, OUI-36 databases (for decoding vendor part of MAC/EUI-48/EUI-64)
* IPv4 assignment databases from IANA, ARIN, RIPENCC, APNIC, LACNIC, AFRINIC (for selecting proper registry in ipv6calcweb.cgi and IPv4 anonymization)
* IPv6 assignment databases from IANA, ARIN, RIPENCC, APNIC, LACNIC, AFRINIC (for selecting proper registry in ipv6calcweb.cgi and IPv6 anonymization)
* ASN assignment databases from IANA, ARIN, RIPENCC, APNIC, LACNIC, AFRINIC (for IPv4/IPv6 anonymization)

Supported external databases:
* GeoIP(MaxMindDB) - internally handled as GEOIP2
* IP2Location(BIN) - internally handled as IP2LOCATION
* IP2Location(MaxMindDB) - internally handled as IP2LOCATION2
* db-ip.com(MaxMindDB) - internally handled as DBIP2


Where to get:
 Homepage:
  https://www.deepspace6.net/projects/ipv6calc.html

 Latest releases of sources:
  https://github.com/pbiering/ipv6calc/releases

  ftp://ftp.bieringer.de/pub/linux/IPv6/ipv6calc/
  http://www.bieringer.de/ftp/pub/linux/IPv6/ipv6calc/
  https://www.bieringer.de/ftp/pub/linux/IPv6/ipv6calc/

  ftp://ftp.deepspace6.net/pub/ds6/sources/ipv6calc/
  http://www.deepspace6.net/ftp/pub/ds6/sources/ipv6calc/
  https://www.deepspace6.net/ftp/pub/ds6/sources/ipv6calc/

 GitHub access:
  https://github.com/pbiering/ipv6calc

 Available formats:
  tar.gz
  spec-file is included, so you can build an RPM from source tarball using rpm -ta ipv6calc-version.tar.gz

 Ready to use packages for several operating systems:
  Linux:
   Fedora (https://src.fedoraproject.org/rpms/ipv6calc)
    Core 6: initial developing platform, so use given hint above to create a RPM
    since 7: package is included
   Enterprise Linux (https://src.fedoraproject.org/rpms/ipv6calc / https://koji.fedoraproject.org/koji/packageinfo?packageID=366):
    EL3: build from source package potentially still work but not tested anymore, OS is EOSL
    EL4: build from source package potentially still work but not tested anymore, OS is EOSL
    EL5: build from source package potentially still work but not tested anymore, OS is EOSL
    EL6: build from source package potentially still work but not tested anymore, OS is EOSL
    EL7: package is available via EPEL
    EL8: package is available via EPEL
    EL9: package is available via EPEL
    EL910: package is available via EPEL
   Mandrake (EOSL):
    similar to Red Hat, rebuild should work, too
   Debian:
    maintained package at http://packages.debian.org/ipv6calc
   Ubuntu:
    maintained package at http://packages.ubuntu.com/ipv6calc
     or http://packages.ubuntu.com/cgi-bin/search_packages.pl?searchon=names&version=all&exact=1&keywords=ipv6calc

  BSD:
   NetBSD:
    ftp://ftp.netbsd.org/pub/pkgsrc/current/pkgsrc/net/ipv6calc/README.html
   FreeBSD:
    http://www.freshports.org/net-mgmt/ipv6calc/ (http://www.freebsd.org/cgi/query-pr.cgi?pr=34441)
   OpenBSD:
    http://www.openbsd.org/cgi-bin/cvsweb/ports/net/ipv6calc/


Mailing lists:
 ipv6calc-announce
  Reason: sending announcements of new versions
  Traffic: very low
  Postings: only moderators are allowed to post, others are rejected automatically
  Subscription: https://lists.deepspace6.net/postorius/lists/ipv6calc-announce.lists.deepspace6.net/

 ipv6calc
  Reason: discussions
  Traffic: medium
  Postings: only subscribers are allowed to post
  Subscription: https://lists.deepspace6.net/postorius/lists/ipv6calc.lists.deepspace6.net/