Comments for ipsidixit.net

Comment on IPv6 – Proxy the neighbors (or come back ARP – we loved you really) by rene

rene — Mon, 23 Jan 2012 20:47:55 +0000

I used to route a PA (provider assigned) IPv4 range through a server of mine via openVPN to my home system where it was used on the internal lan. After initial setup it worked great. Systems in the home lan have public addresses from that range and it worked – after activating proxy_arp on the server.

Of course doing the same thing with IPv6 now fails – no more arp and proxy_ndp doesn’t really work satisfactorily. Luckily, I found this page, got npd6, activated it and bam, without any further change on my side everything works. Now I route an IPv6 range through my server into my lan and used radv successfully to configure windows machines.

The whole configuration of this not so common setup is pretty similar between IPv4 and IPv6, for the routing parts. The only difference, but a major one and absolutely unexpected, the problem with neighbor solicitation/proxying.

Comment on BMW France – To be avoided by Don

Don — Sun, 18 Dec 2011 08:57:05 +0000

Being in a position of living in France I can assure you that it is not just BMW France it is the French service (term used exceptionally lightly) industry as a whole. I’d just say buy what you want & expect no help and to be ripped off, then when someone is actually helpful you will be pleasantly surprised. That last part is still to happen for me but there could be a blue moon coming soon. I had a Citroen where replacing the clutch cost about 3 times the price compared to the UK and it broke down within a week of it being “fixed” with electrical faults (never having any electrical hiccups before). 3 weeks later with the car sitting at the side of the road where it broke down for the full time they agreed to collect the car at my expense (nothing happens immediately – plenty of chasing on my behalf, no call backs etc) then when they get it back and realise they didn’t close the fuse box or something so they fixed it and I didn’t pay but 3 weeks, come on!!! And no appology of note. Also, a friend had numerous problems with his Passat, surely a very reliable car, but he just kept getting fleeced for a thousand here and a thousand there until the cambelt snapped and he gave the car up after a numerous thousand euro bill. Their response c’est la vie even though he had his services carried out on time at a main VW garage. So, as I said, buy what you want and be lucky.

PS to some up customer ‘service’ one of the times I called Citroen about the above issue I was on hold for 10 mins to get through then at 12 noon I was cut off. No answer on calling back. They had all gone for lunch and weren’t back till 2.
PPS Beautiful country though

Comment on IPv6 at home – a guide to getting started by sgroarke

sgroarke — Thu, 08 Dec 2011 06:30:40 +0000

Fixed. Thanks!!

Comment on IPv6 at home – a guide to getting started by Andrew J. Leer

Andrew J. Leer — Thu, 08 Dec 2011 02:38:25 +0000

Thanks for writing this tutorial! I am enjoying it greatly.

There’s a spelling mistake (no big deal I’m sure) but if you want to correct it I’m letting you know in the “DHCP client I get, but what’s with DHCP server versus radvd?” it reads “since it dos not allocate any” instead of “since it does not allocate any”

You can delete my comment if you like, I just wanted to let you know about it.

Comment on IPv6 and default routes by Steve

Steve — Thu, 01 Dec 2011 09:25:32 +0000

Brilliant — many thanks. This has solved my problem

Comment on npd6 – Software now available by sgroarke

sgroarke — Thu, 10 Nov 2011 15:02:45 +0000

Well, any luck? I just ran some lab tests between a Ubuntu server running the dibbler ipv6 dhcp6d, and a client with the default isc dhclient. All worked pretty much out of the box. I’d suggest:
- What server are you using?
- Then check the myriad options which it may be supplying back to the client. In dibbler, for example, they are all enabled by default. Turn’em off and try again!
- Run dhclient with the -v option and see what it sees.
- Maybe also run a pcap on the network to see what exactly the server is handing back.
- On the client, check the lease file(s) in /var/lib/dhcp. If dhclient is accepting an offer, but it then fails to actually drop it onto the i/f, you should get something there.

Some pointers… Tell us what you find!

Comment on npd6 – Software now available by sgroarke

sgroarke — Wed, 02 Nov 2011 13:25:15 +0000

Off hand no… sorry. But I may yet poke around in that area and see what I can see. Personally I’m sorely tempted to go down the “static-ish via DHCP” route (as so often done in IPv4) path for the home network. I think the one area I nee to investigate better it just how many client devices are likely (today and into the future) to support DHCPv6 “out of the box” without the need (if even possible!) to add a client.

So you’ve piqued my interest into doing a quick lab test with the Ubuntu tools to see what they do (or don’t do…) look back here for an update maybe soon!

Comment on npd6 – Software now available by Piyush Agarwal

Piyush Agarwal — Fri, 28 Oct 2011 21:56:12 +0000

Hi,
Sorry for a rather off-topic question.

Are there any recommendations you would have for stateful DHCPv6 address assignment? I want control over ipv6 address assignment hence don’t want to use SLAAC.

I am trying to get ISC DHCPv6 client (ubuntu lucid) to accept a DHCPv6 server assigned IP address. While the client sees the DHCPv6 reply packet with the ipv6 address, the address does NOT get configured on the interface — i.e., “ip -6 addr show” does not show the address configured. I am clueless.

Comment on npd6 – Software now available by sgroarke

sgroarke — Mon, 10 Oct 2011 08:31:50 +0000

So bug 27 now has a lot of detail in it!! I think the issue is resolved now – it related to a rather interesting scenario where other IPv6 devices are performing “Duplicate Address Dectection”, by means of using Neighbor Solicitation messages – which is a legitimate activity. npd6 now correctly detects this and, essentially, ignores it rather than erroring as it was doing previously (although previously it did not fail – it just barfed an error report and carried on)

Comment on npd6 – Software now available by old_guy

old_guy — Wed, 05 Oct 2011 11:24:39 +0000

Thanks for the quick reply .
I has added more info on bug report#27 .
( However , I may have already enabled the –debug2 flag on my previous log )