Page 1 of 1

IPv6 - Another in my just curious mode

Posted: 2009-10-29 01:22
by percepts
In the IP ranges the default is 0.0.0.0 thru 255.255.255.255

How does that work with IPv6 ? Does anything need to be changed?

Re: IPv6 - Another in my just curious mode

Posted: 2009-10-29 01:25
by sheffters
weirdly ...

http://www.subnetonline.com/pages/subne ... verter.php

... hence noone can be arsed implimenting ipv6 ... woulda been much easier to add another few digits to the ipv4 instead of all this crap they've come up with.

S.

Re: IPv6 - Another in my just curious mode

Posted: 2009-10-29 01:35
by percepts
OMG I wish I hadn't asked :shock:

Re: IPv6 - Another in my just curious mode

Posted: 2009-10-29 01:37
by ^DooM^
IPV6 Support is not yet added to hMailServer.

Sheff : You could just add more digits to the IPV4 range but why bandaid an old protocol when you may as well create and use the new one if changes are needed to be made anyway? :) Under IPV6 every single item that can connect to a network will be able to have it's own IP address. Dynamic IP's will become a thing of the past.

Re: IPv6 - Another in my just curious mode

Posted: 2009-10-29 01:44
by sheffters
Cos the old stuff works ... dont change whats not bust ... "everyone" understands ipv4 ... imagine the home networking traumas and the like that were gonna end up fixing for x/y/z family / mate / whatever ...

... another few digits on an ipv4 address like 123.456.789.123.456.789 would be far easier than messing with letters and : and the like ... not to mention the mess wiith recoding applications ... which is now harder since validation routines and the like all need rewriting rather than tweaking ...

... its not a bad idea to redo the whole thing ... just think it coulda been done a lot better than reinventing the wheel for no reason ... they could quite easily have gone for a simpler option and got the same end result I think

re dynamic ips: I'm sure dynamic ips will be here for ever ... cant even use port 25 from a lot of isp's ... and thats just them being anal rather than a technology problem ... I cant see them ever dishing out static IPs for fun ... its easy enough to do now on adsl / cable thats always connected ... yet virgin media insist on changing my home ip at random just for kicks ... dynamic ips are here to stay cos it suits them!

Re: IPv6 - Another in my just curious mode

Posted: 2009-10-29 01:53
by ^DooM^
Perhaps on the dynamic IP front but there will be no need under IPV6. I agree it's not the easiest approach to the problem. I am sure when everyone was comming up with IPV6 they thought long and hard about adding more numbers to the IPV4 stack and rejected it in favour of IPV6. Why? I'm sure it wasn't for kicks and giggles.
The Internet Protocol (IP) that we use at present is version 4 (known as IPv4). It had been around for many years, but does not scale well enough to last in the long term. The main problem is the address space - the number of IP addresses that exist. Whilst these are not running out quite yet, and careful management has meant they will last some time, they will eventually run out.

Existing IPv4 addresses use 32 bits which gives about 4 billion combinations. You may have seen IP addresses written like this, 192.168.1.2.

IPv6 is version 6 of IP (version 5 was allocated to an experimental resource control protocol called ST2+ which never got much use). It has a number of key changes, and some thought has gone in to the way the protocol works in the way that the world currently uses the internet. One of the key differences with IPv6 is the address space. It uses 128 bit addresses which is a lot of addresses (340282366920938463463374607431768211456 to be exact) - more than enough to give an address to every atom in every computing device in the planet.

Re: IPv6 - Another in my just curious mode

Posted: 2009-10-29 01:58
by ^DooM^
An excellent site about IPv6 if you are really interested.

http://www.computerperformance.co.uk/Longhorn/ipv6.htm

Re: IPv6 - Another in my just curious mode

Posted: 2009-10-29 02:29
by percepts

Re: IPv6 - Another in my just curious mode

Posted: 2009-10-29 18:29
by martin
Actually...
http://www.hmailserver.com/documentatio ... tails_ipv6
(since 5.3)
not to mention the mess wiith recoding applications
The same mess would occur even if if you just "add a few digits". From my perspective when doing the hMailServer implementation, IPv6 is not much more than storing a few extra digits and changing some flags in the network library whether or not IPv6 should be used. Just adding a few digits to IPv6 would require the same changes.
just think it coulda been done a lot better than reinventing the wheel for no reason
IPv6 is in many ways similar to IPv4 but more simple (for instance by simplifying the protocol header.

Just adding a few digits to IPv4 would mean that (almost) all hardware and software would need changes anyway. Because of that, it makes sense to do some redesign.