@JSCybersec @stefano @gyptazy

The ISP disallows the use of personal routers. They instead provide cheap and obsolete VDSL2 routers which they never patch the vunurabilities out of and also lock them down with a fairly weak alphanumerical password.

I can gain access if I really want to (because of the unpatched firmware) but refuse to do so, since I dont want a chance of them to lock me out, when the router is physically replaced in two years in retro spec, or earlier when they run FTTH in my street and also replace it with the fibre to copper routers they give from Huawei.

When FTTH is placed, you get VOIP to 48V copper for regular POTS phones and data from a cheapish Huawei router placed after a fibre to copper box in your premises

🖋️ #bash #sh #zsh #ksh #csh #Networking #IPv6 #IPv4 #tunnel #twotunnels #ProxMox #freeBSD #Linux #POSIX #Programming

I face numerous problems with my ISP working internally with IPv4 while all of their routers switches and gateways being fully IPv6 capable, yet unconfigured in that address space

I have been graced with access to a wonderfull service which is of course IPv6 based, since those addresses are in copuous ammounts available. A fixed IP has been assigned to the service

My ISP charges a lower arm and an upperleg for a fixed IPv4 address. Their cheap unpatched gateways are closed, so I'm not allowed to use the ICMP protocol to their router let alone set ICPM_ECHO to enable on the device.

The routing service I signed up for wants ICMP_ECHO on, because a tunnel needs it

Im correcting the above sentence. The provider of the IPv6 tunnel demands it. Accoring to protocol it's not needed. I will check in which RFC this is stated so I can learn more about IPv4 to IPv6 tunneling

I have used a cludge to get to IPv6 by running a tunnel to a service which gives me both a fixed IP and ICMP_ECHO 0 & 8.
I then tell the IPv6 routing server to build the tunnel based on the properly configured IPv4 fixed address I have tunneled to.

This works for about an hour or so. From linux I use the following command set to configure sit0 and sit 1

{
su -

ifconfig sit0 up
ifconfig sit0 inet6 tunnel ::[my IPv4 tunnel address]
ifconfig sit1 up
ifconfig sit1 inet6 add [my IPv6 address]
route -A inet6 add ::/0 dev sit1
}

the devices come up nicely I can ping my IPv6 address and use the VM at that address.

After an hour or so, only when I stopped using both tunnels, for more than 15 minutes, the ping response dies on the second tunnel, consequently also on the whole IPv6 range. When I check the VM provider all Hypervisors (ProxMox) run fine with minimal load.

This means that something needs to keep the tunnel alive since I run data to two tunnels at once

Once tunnel number two goes in slumber mode it does not wake up again.

I have not traced back how to run a KEEP_ALIVE packet stream on the IPv6 tunnel

Source https://en.wikipedia.org/wiki/Internet_Control_Message_Protocol

@stefano @gyptazy

🖋️ #bash #sh #zsh #ksh #csh #Networking #IPv6 #IPv4 #tunnel #twotunnels #ProxMox #freeBSD #Linux #POSIX #Programming

Good morning everyone 🙂

Here's another photo of one of the 20 iron sentinels of the Combe Down Tunnel just south of #Bath.

Here, I was able to catch the ghostly outline of the refuge alcove too, illuminated by the pulsing glow of the sentinel as it bops along to the music.

The longer exposure time has also caught a hint of what the inner disk of the sentinel looks like too.

#FujiFilm #XH2 / 47mm / 30 sec / f8 / ISO 500.

#photography #TwoTunnels #art #sustrans

Good morning everyone 🙂

This is a photo of one of the 20 iron sentinels of the Coombe Down Tunnel just south of #Bath.

Together, they form a light-and-sound art installation that greets you as you reach the middle of this 1.7 km former railway tunnel.

Well worth a visit!

#fujifilm #XH2 87mm / 2.5 sec / f8 / ISO 500

#photography #TwoTunnels #Art #MiraCalix

Good morning, everyone.

Made my first visit to the #TwoTunnels in #Bath yesterday.

Very different to the tunnels on the #MonsalTrail. Well worth a visit if you enjoy this sort of thing.

I could have stayed in there all day trying to do them justice. Needless to say, I'll be heading back there before too long!

#Fujifilm #X-H2 / 21mm / f/4 / 1 sec / ISO 800

#photography #BlackAndWhite #tunnels #CycleTrails