Using the Internet without IPv4 connectivity
jamesmcm.github.io
Using the Internet without IPv4 connectivity
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Re: Using the Internet without IPv4 connectivity
#2If anyone else runs into this, it's very easy to set up an ssh proxy: ssh -D 8080 user@hostname
Once that connection is set up, point your browser to use localhost:8080 as a socks proxy.
Re: Using the Internet without IPv4 connectivity
#3Slightly misleading title, this is more “getting to the IPv4 internet via an IPv6 tunnel through a VPS”. Also just called 4in6.
Interesting nonetheless!
We find at our ISP that if we break something with IPv4 we experience a very different type of support issue to if we break IPv6. Breaking v4 results in, broadly, a pretty hard “down” state. While folks are unhappy, it is at least simple. Breaking v6 results in weird, and a partial down, which manifests for the users as partial outages, slow starts due to fall back, etc. Especially if their gateways believe there is v6 when there isn’t.
Re: Using the Internet without IPv4 connectivity
#4One thing I appreciate about Apple’s App Store rules is that they require all apps to work on IPv6-only networks. They’ve had that rule in place for many years. It’s a little surprising as a developer the first time you run into it, but I’m glad it’s there as a user.
Re: Using the Internet without IPv4 connectivity
#5One thing I appreciate about Apple’s App Store rules is that they require all apps to work on IPv6-only networks. They’ve had that rule in place for many years. It’s a little surprising as a developer the first time you run into it, but I’m glad it’s there as a user.
Is github accessible by v6 as long as you use the app?
Re: Using the Internet without IPv4 connectivity
#6So, those mythical IPv6-only internet users actually exist :) That's some great network engineering.
I once needed something like that for the perhaps more common inverse purpose, to work on something IPv6 from within my happy IPv4-only connection. A more limited, but quicker solution given full control of a server - I set up a SOCKS5 proxy, using:
ssh -D 1080 -N myserver
Re: Using the Internet without IPv4 connectivity
#7[deleted]
Re: Using the Internet without IPv4 connectivity
#8If anyone else runs into this, it's very easy to set up an ssh proxy: ssh -D 8080 user@hostname Once that connection is set up, point your browser to use localhost:8080 as a socks proxy.
I was just about to offer the same advice. It's a far simpler solution to a temporary problem - and equally, a permanent tool for the times when you want to proxy.
Don't forget that this function needs "AllowTcpForwarding" to be enabled in your sshd_config.
Re: Using the Internet without IPv4 connectivity
#9I'm in the same situation myself. It's quite frustrating, since 2 weeks I have been told that "the ticket is open and the technicians will take a look soon". Not sure if stuff like this has a low priority since IPv6 works and it's not considered a total outtage? In Germany there are laws to grant consumers compensation in those cases, but I'll see if this counts soon enough.
One problem with the solution in this blog post is that various endpoints block datacenter IP ranges entirely or make you go through various captcha hoops, but no good way around that. Same for common VPN providers.
Since I wanted to fix this for my entire home network I also had to do this on my router - in those cases it's quite beneficial to have a non-standard device like an Ubiquiti EdgeRouter, not sure how I would have set up all the Wireguard routing and nat rules on something like a FritzBox. The only downside is that the Router isn't powerful enough to handle a lot of connections, so I'll have to switch to IPSec which is supported by hardware offloading.
Re: Using the Internet without IPv4 connectivity
#10I'm operating a few IPv6-only VPNs at work, for access to internal infrastructure.
The biggest problem so far is that Windows and macOS clients need a v6 DNS server.
Otherwise, they won't even try to resolve v6onlyhost.vpn.example.com.
Because the client may or may not be in a v6-enabled network, I have to run a DNS server inside the VPN and push that to the client, which can lead to all kinds of problems when the VPN disconnects but the Wireguard app for some reason fails to reset the DNS to the original one.