cancel
Showing results for 
Search instead for 
Did you mean: 

What is wrong with IPv4?

summers
Rising Star
Posts: 202
Thanks: 18
Registered: ‎01-06-2014

What is wrong with IPv4?

In this sub forum, there are many questions as to when IPv6 will be coming to plus.net - so I decided to ask the question from a different perspective, what are users problems with IPv4?

Now want the question to be used focused, e.g. the common reason given for IPv6 is that IPv4 addresses are running out. However I haven't heard of any plus.net customers not able to get an IPv4 number, or being on CGNAT. So IPv4 addresses running out isn't a problem for plus.net as far as we can tell, so not a problem for users.

So instead, what are your problems with IPv4?

For me the major problem is being behind a NAT on my home router. Firstly setting up a NAT is a hassle; but more importantly its difficult from the WAN to connect to anything at home. E.g. if I wanted a simple web server on a home computer, I need to set up a specific DNAT on my home router - and this is a hassle. This has to be done for each connection.

I don't have problems connecting to IPv6 web sites - as I run 6in4 so can connect. However all 6in4 packets are routed via a specific address, and IIRC this means that plus.net makes all 6in4 packets go via he.net. This hasn't caused a problem but could it cause a problem?

So what are other users experiences? How has being stuck on IPv4  affected your internet connection? What impact has it had?

2 REPLIES
corringham
Pro
Posts: 213
Thanks: 114
Fixes: 2
Registered: ‎25-09-2015

Re: What is wrong with IPv4?

You are right that IPv4 isn't a problem for most Plusnet users - most probably don't know what IPv4 or IPv6 is, they just want the internet (or rather specific applications) to work for them.

IPv4 addresses are limited, but in fact there are more IPv4 addresses available now than there were a few years ago - because a lot of large companies have moved to IPv6 addresses on internal networks and have sold their IPv4 ranges.

However IPv6 is desirable for several reasons, including:

- future proof (for the foreseeable future)

- faster routing (not true with IPv4 to IPv6 bodges)

- lots of addresses so IoT devices can have unique public addresses without ugly port-forwarding

I have IPv6 on my Plusnet account by using a L2TP tunnel to AAISP - I get AAISP's fixed IP addresses (IPv4 and IPV6) etc, but pay Plusnet prices.

Highlighted
summers
Rising Star
Posts: 202
Thanks: 18
Registered: ‎01-06-2014

Re: What is wrong with IPv4?

@corringham yes I think both our thoughts are in agreement.

  1. future proofing to me is giving enough IP addresses for the world, this though is a problem for plusnet, and not us users - so this is pressure on them not us.
  2. faster routing, whilst in principle I agree, as 6in4 and 6to4 for plusnet go via he.net. I'm not sure what real difference it gives. e.g. a tracepath gives: vl241.ptw-ag02.plus.net: 49.815ms, 192.88.99.1 58.667ms; and a ping to 192.88.99.1 as 36.3ms. So most of my delay is going across an interlaced ppp connection to my plusnet gateway.
  3. Yes, same as my point about running web servers, or external ssh connections, etc

So what I see here, is that most of the pressure to move to IPv6 is upsteam in plusnet. And as far as us users can see, this isn't something that plusnet worry about at the moment. So from a user position all we can do is wait and see what happens. Maybe just confirm our adsl routers are IPv6 compatible.

The above though does make me wonder what plus,net relationship with he.net is? E.g. at the moment they route 192.88.99.1 to he.net. Is this a formal agreement? If it isn't how long will he.net tolerate this?