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A question about IPv6

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New Member
Join Date: Jul 2012
Posts: 3

A question about IPv6

If I have something like Webalizer, happily in its own world registering IPs all day long, and all I see on it are IPv4, does it mean the site it's measuring is inaccessible through IPv6, or does it mean IPv6 can access it but webalizer doesn't register its existence?

Or does it mean an IPv6 access is being translated into an access from a specific IPv4 that the webalizer is registering?

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Corporate Member
Join Date: Apr 2004
Location: Singapore
Posts: 702
You have to imagine ipv4 and ipv6 is running on an isolated separate network. Typically no translation between ipv4 and ipv6.

A server with only ipv4 address can only be access by client with ipv4 address

A server with only ipv6 address can only be access by client with ipv6 address

A server with both ipv4 and ipv6 address can be access by ipv4 only client, ipv6 only client or a client with both ipv4 and ipv6, if both ipv4 and ipv6 is available, modern software will use ipv6 as priority.

For software application, it need to design to support both protocol. For simple apps eg. Ping or traceroute, there is ping6 and traceroute6 develop to support ipv6 network, in Linux firewall, there is iptables and ip6tables, iptables take are the ipv4 firewall rules, while ip6tables take care the ipv6 firewall rules.

Hope this information helps.

Temporarily Suspended
Join Date: Jul 2012
Location: Toronto
Posts: 13
webalizer does support ipv6, if your server has an ipv6 ip then ipv6 users can access it. your network should be ipv6 capable first.

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