Inbound traffic on a backup internet connection using 2D data

Forums › 2degrees (including Slingshot, Orcon, Flip, Stuff Fibre, MyRepublic, 2talk and Vocus) › Inbound traffic on a backup internet connection using 2D data

1 | 2

SaltyNZ

8118 posts

Uber Geek

Trusted

2degrees

Lifetime subscriber

#684847 12-Sep-2012 11:36

Zeon:

Lots of devices support IPv6. My last 2 Androids have and I can go onto this website via my Galaxy Nexus and IPv6 over Wifi now. The carriers need to show initiative here and get IPv6 rollout underway. Nearly all have been really slack in this regard.

Not nearly enough though. Some recent Android builds do, but not all. The Galaxy SIII doesn't let you select it, for example. We didn't have a lot of success with iOS 5, although in theory it is supported. Lots of Symbian S60 devices do it fine, but there are none left in the market. Windows phones -- well, we've heard of them *cough*.

The bottom line is it's nowhere near well enough supported on a broad enough range of devices to be released to the unwashed masses.

iPad Pro 11" + iPhone 15 Pro Max + 2degrees 4tw!

These comments are my own and do not represent the opinions of 2degrees.

Lenovo

Shop now for Lenovo laptops and other devices (affiliate link).

taron

3 posts

Wannabe Geek

#684850 12-Sep-2012 11:39

SaltyNZ: It was inevitable that we would have to do this - APNIC has been out of IPs for some time now, so as we approached the end of the IP address space that we had, something had to be done. If we have 100,000 customers with simultaneous data sessions using public IPs, then we need 100,000 public IPs. If we do a 10:1 NAT then we can support 1,000,000 simultaneous connections with 100,000 IPs.

One day IPv6 will be an option - but not at the moment. Not enough devices support it. In the meantime we have turned to carrier-grade NAT to conserve IPv4 addresses. But yes, if you need a full two-way unfiltered public IP you can get it with the 'direct' APN. That will remain the medium term plan, where 'medium term' is defined as 'until IPv6 is actually useful'.

When you say 10:1 NAT what exactly is happening, because when I use the APN 'internet' I appeared to have a public IP. If I was NAT'ed I would have expected to have been allocated a private IP. I also confirmed that by using whatismyip.com.

SaltyNZ

8118 posts

Uber Geek

Trusted

2degrees

Lifetime subscriber

#684854 12-Sep-2012 11:40

taron:

When you say 10:1 NAT what exactly is happening, because when I use the APN 'internet' I appeared to have a public IP. If I was NAT'ed I would have expected to have been allocated a private IP. I also confirmed that by using whatismyip.com.

We're rolling it out gradually. Not quite all 'internet' connections get NAT yet.

iPad Pro 11" + iPhone 15 Pro Max + 2degrees 4tw!

These comments are my own and do not represent the opinions of 2degrees.

Zeon

3913 posts

Uber Geek

Trusted

#684867 12-Sep-2012 11:51

With IPv6 though how will you do it to allow tethering or devices behind the phone? Will you have a /64 subnet for each device and then route a few /64s down it?

Speedtest 2019-10-14

SaltyNZ

8118 posts

Uber Geek

Trusted

2degrees

Lifetime subscriber

#684869 12-Sep-2012 11:52

Zeon: With IPv6 though how will you do it to allow tethering or devices behind the phone? Will you have a /64 subnet for each device and then route a few /64s down it?

Well, as I said, it doesn't work well enough with enough devices for us to have a clear plan at this point.

iPad Pro 11" + iPhone 15 Pro Max + 2degrees 4tw!

These comments are my own and do not represent the opinions of 2degrees.

Publius

276 posts

Ultimate Geek

#684932 12-Sep-2012 13:27

SaltyNZ:
taron:

When you say 10:1 NAT what exactly is happening, because when I use the APN 'internet' I appeared to have a public IP. If I was NAT'ed I would have expected to have been allocated a private IP. I also confirmed that by using whatismyip.com.

We're rolling it out gradually. Not quite all 'internet' connections get NAT yet.

I think what most people mean when they say NAT (on this page) is firewalling. Voda/XT have always had their default internet access APN firewall incoming packets, but the connection did get a real world IP.

What SaltyNZ is referring to is carrier-grade NAT which is different. 1 public IP is shared amongst a number of users at the same time. I haven't heard of any NZ ISPs doing this although it has been an expected outcome of IPv4 exhaustion.

SaltyNZ: For a user behind carrier-grade NAT will they get a real-world public IP address or private IP?

SaltyNZ

8118 posts

Uber Geek

Trusted

2degrees

Lifetime subscriber

#684955 12-Sep-2012 13:59

Publius:

SaltyNZ: For a user behind carrier-grade NAT will they get a real-world public IP address or private IP?

Private IP.

iPad Pro 11" + iPhone 15 Pro Max + 2degrees 4tw!

These comments are my own and do not represent the opinions of 2degrees.

n4

959 posts

Ultimate Geek

#684976 12-Sep-2012 14:25

SaltyNZ:
Zeon:

Lots of devices support IPv6. My last 2 Androids have and I can go onto this website via my Galaxy Nexus and IPv6 over Wifi now. The carriers need to show initiative here and get IPv6 rollout underway. Nearly all have been really slack in this regard.

Not nearly enough though. Some recent Android builds do, but not all. The Galaxy SIII doesn't let you select it, for example. We didn't have a lot of success with iOS 5, although in theory it is supported. Lots of Symbian S60 devices do it fine, but there are none left in the market. Windows phones -- well, we've heard of them *cough*.

The bottom line is it's nowhere near well enough supported on a broad enough range of devices to be released to the unwashed masses.

Also, I believe quite a few Android devices supported IPv6 on Wifi but not the mobile network. Can't remember if it was an OS or chipset limitation.

Samsung Note20 Ultra, on 2degrees

Publius

276 posts

Ultimate Geek

#684995 12-Sep-2012 14:54

SaltyNZ:
Publius:

SaltyNZ: For a user behind carrier-grade NAT will they get a real-world public IP address or private IP?

Private IP.

Thanks for that, it should make diagnosing any nat faults a little easier if its obvious a user is on a private ip.
Having an optional APN with a private IPv4 and public IPv6 address would be awesome tho! :)

Publius

276 posts

Ultimate Geek

#689514 21-Sep-2012 15:41

Publius:
SaltyNZ:
Publius:

SaltyNZ: For a user behind carrier-grade NAT will they get a real-world public IP address or private IP?

Private IP.

Thanks for that, it should make diagnosing any nat faults a little easier if its obvious a user is on a private ip.
Having an optional APN with a private IPv4 and public IPv6 address would be awesome tho! :)

And for anyone googling this later, it appears 2deg are now using the new Private IP block 100.64.0.0/10 for NAT'd connections.

1 | 2