Chase the cracks with an angle grinder, clean them out, fill with silica sand, then use 2-part caulked-style epoxy crack filler to fill the cracks. Then paint over the floor with an inexpensive epoxy paint like Dry-Lok E1. Assuming you have an angle grinder and basic painting supplies, this is a $200 job.
Ahoy!
- Dean liked afternoons like this. He was home from school, Sammy was home from the sitter he went to sometimes, and their dad was nearby, sitting on the porch. Dean liked it best when they were all together. His dad said going to school meant he was a big boy now, but it meant going way. He just wished Sammy was big enough to go to.
- Accidents have the potential to be wonderful things. Particularly when the result is the creation of truly legendary cannabis such as the Gorilla Glue strain.A perennial favourite on a global basis, the affectionately known GG is the kind of strain that packs a punch even cannabis connoisseurs are often surprised.
Continuing the trend of blog posts that exist to document things we don’t want to forget,I present Configuring dual stack IPv6 without DHCPv6-PD.
If you’re wondering wtf than yes, this is a slightly bespoke setup that you won’t find withresidential ISPs. Recently we’ve moved (the cause of all technical progress it seems) andwith that I switched from Internodes business NBN to a new business centric ISP toconnect our new place.
Ulterior motives
Why IPv6?
Well it is year 2020 so it would be remiss of me not to continue to tradition of being a salty“But I can’t reach you on IPv6” type user and help push the internet to a better placewhere I can.
But really the thing I needed most was to be able to connect to ephemeral instances in AWS EC2without stuffing around to setup dynamic DNS. I was wanted a lazy option to SSH into. Turns outstatic IPv6 addresses are free 🎉 while IPv4 elastic IPs are free only while the instance isrunning.
Going dual stack
The ISP is configured a bit differently to residential ISPs in Australia hence this blog.The IPv4 features are nothing unsurprising, a static IPv4 session with /29 framed route.
But the IPv6 prefix, while being the typical /56 is delivered via a static interfaceroute which is normally is handled by a managed CPE router but in my case needs to beterminated on my ER-X.
Consider my IPv6 prefix of 2001:0DB8::/56 and my interface the expected pppoe0 for thisexercise.
On the pppoe0 interface I have some IPv6 configured and I get a remote peerfe80::f381:9ee4:b2f2:89a0 to chat with. I can ping across the link but the internet cansurely not talk with me on a fe80:: address.
How do we get our subnet actually routing over these private addresses?
Interface routing on Edgerouter-X
I learned a new trick here, and I admittedly still don’t fully understand PtMP wired networksbut here is how it works.
Configure your subnet on the loopback interface.
Setup the IPv6 default route for
pppoe0.
That is actually the entire setup from a routing perspective. It may be among some of thelongest time I’ve spent trying to understand two lines of config.
Wire up your LAN
Now the internet knows where your router is inbound and your router knows where to sendoutbound traffic. Next you’ll actually want to tell your LAN clients about it.
Use router advertisement to further sub-divide the network by interface. Here we’ll configurea /64 for each internal LAN segment.
Configure the router interface address.
Configure router-advertisements for LAN clients.
Commit and save the config
Seeing it in action
With an interface assigned and routing configured you can see the full routing table inaction after the config is reloaded.
And no where along this journey did you need to fight with DHCPv6-PD firewall issues,client arguments, or arcane version issues.
It was actually surprisingly easy in the end. Obviously you’ll still need to configureyour own firewall policy for IPv6 which is pretty frustrating but a good zone-policytool should make that a once off too.
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Bonus points - IPv6 upgrades in AWS VPCs
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One gotcha I encountered in this journey was relatively unexpected. While upgradingthe existing legacy VPC I’d created years ago to support IPv6 EC2 instances I foundthe instance was able to get an IPv6 address but not actually reach remote hosts?
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Was it security groups? Nope. Was it my own borked routing? Nope. This process continuedfor a little while before I remembered my old friend the IGW.
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If you’re upgrading an old VPC to IPv6, don’t forget you’ll need to wire up a static::/0 route to your IGW for IPv6 traffic to egress on!