HOW TO: IPv6, 6in4 tunnel for begginers

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bl@d3runn3r
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Joined: 10 Jan 2010
Posts: 210

PostPosted: Mon Feb 09, 2015 13:02    Post subject: Reply with quote
Fhajad wrote:
Juniorek wrote:
p.s. - edit
updated to 25697 and radvd is dead;/
gotta revert to prev build


This may be my problem that this build doesn't work with IPv6. Does anyone know what version does work?

radvd isn't starting for me properly appears to be the issue, and even if I statically assign an IP on my PC IPv6 doesn't pass thru.
IPv6 works perfect here, see my sig for build number.
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Fhajad
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Joined: 26 Mar 2009
Posts: 12

PostPosted: Mon Feb 09, 2015 13:26    Post subject: Reply with quote
bl@d3runn3r wrote:
IPv6 works perfect here, see my sig for build number.


Tada! It works perfectly now, thank you!
Mile-Lile
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Joined: 24 Feb 2013
Posts: 1634
Location: Belgrade

PostPosted: Sat Mar 07, 2015 7:46    Post subject: Reply with quote
If someone has problem with radvd, you can use dnsmasq for DHCPv6... just enter these to Additional DNSMasq Options

Code:
interface=br0
dhcp-range=::1000,::FFFF,constructor:br0,300
ra-param=*,10,300
enable-ra
quiet-ra
quiet-dhcp
quiet-dhcp6
Juniorek
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Joined: 14 Feb 2011
Posts: 72

PostPosted: Sat Mar 07, 2015 8:48    Post subject: Reply with quote
bl@d3runn3r wrote:
Fhajad wrote:
Juniorek wrote:
p.s. - edit
updated to 25697 and radvd is dead;/
gotta revert to prev build


This may be my problem that this build doesn't work with IPv6. Does anyone know what version does work?

radvd isn't starting for me properly appears to be the issue, and even if I statically assign an IP on my PC IPv6 doesn't pass thru.
IPv6 works perfect here, see my sig for build number.


man... that post is like 2 months old...

i`m already at 26372...
tried newer builds but they've got broken radvd;/
posted a ticket but no answer yet;/

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Juniorek
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Joined: 14 Feb 2011
Posts: 72

PostPosted: Sat Mar 07, 2015 12:50    Post subject: Reply with quote
Mile-Lile wrote:
If someone has problem with radvd, you can use dnsmasq for DHCPv6... just enter these to Additional DNSMasq Options

Code:
interface=br0
dhcp-range=::1000,::FFFF,constructor:br0,300
ra-param=*,10,300
enable-ra
quiet-ra
quiet-dhcp
quiet-dhcp6


thanks man... that solved my problems with radvd and newer builds

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GRMrGecko
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Joined: 27 Oct 2010
Posts: 6

PostPosted: Sat Mar 14, 2015 22:01    Post subject: Reply with quote
My DNSMasq config is as below:

dhcp-range={Assigned / Routed Prefix},ra-only
enable-ra
dhcp-option=option6:dns-server,[2620:0:ccc::2],[2620:0:ccd::2]



If you want to change DNS, right now it's configured for OpenDNS, you can do so my finding the DNS servers and replacing. So for google DNS:

dhcp-range={Assigned / Routed Prefix},ra-only
enable-ra
dhcp-option=option6:dns-server,[2001:4860:4860::8888],[2001:4860:4860::8844]



Simply replace {Assigned / Routed Prefix} with what is set in the IPv6 tab in setup.
bdg2
DD-WRT User


Joined: 18 Apr 2013
Posts: 319

PostPosted: Thu Mar 19, 2015 0:14    Post subject: Reply with quote
GRMrGecko wrote:
My DNSMasq config is as below:

dhcp-range={Assigned / Routed Prefix},ra-only
enable-ra
dhcp-option=option6:dns-server,[2620:0:ccc::2],[2620:0:ccd::2]

<snip>


Interesting -- thanks.

Presumably if your IPv4 DNS severs have IPv6 connectivity (both OpenDNS and Google do) you still don't actually need to specifiy IPv6 DNS servers if you're running dual stack.
bdg2
DD-WRT User


Joined: 18 Apr 2013
Posts: 319

PostPosted: Mon Mar 30, 2015 0:25    Post subject: Reply with quote
Drat.
It still won't play nicely for me.
It nearly works with:
Code:
dhcp-range=::00FF,::FFFF:FFFF:FFFF:FF00,constructor:br0,ra-only
enable-ra

But DNSMasq keeps telling my clients to talk to it with IPv6 for DNS but that doesn't seem to work at all.
Sad
KrypteX
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Joined: 18 Jan 2014
Posts: 2411

PostPosted: Mon Mar 30, 2015 13:48    Post subject: Reply with quote
Looks like Kong found the IPv6/radvd bug, introduced in 26398. Fixed in http://svn.dd-wrt.com/changeset/26616
Thanks Kong !!!

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bdg2
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Joined: 18 Apr 2013
Posts: 319

PostPosted: Tue Mar 31, 2015 22:57    Post subject: Reply with quote
KrypteX wrote:
Looks like Kong found the IPv6/radvd bug, introduced in 26398. Fixed in http://svn.dd-wrt.com/changeset/26616
Thanks Kong !!!


Yes you're right, well done Kong.
All working for me with r26622 on my WNDR3700v2 using original method described in this thread (but with no IPv6 DNS servers just ones reachable via IPv4 that know about IPv6).
KrypteX
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Joined: 18 Jan 2014
Posts: 2411

PostPosted: Wed Apr 01, 2015 6:05    Post subject: Reply with quote
bdg2 wrote:
KrypteX wrote:
Looks like Kong found the IPv6/radvd bug, introduced in 26398. Fixed in http://svn.dd-wrt.com/changeset/26616
Thanks Kong !!!


Yes you're right, well done Kong.
All working for me with r26622 on my WNDR3700v2 using original method described in this thread (but with no IPv6 DNS servers just ones reachable via IPv4 that know about IPv6).

Reopen ticket ? http://svn.dd-wrt.com/ticket/4022
Edit: No need to reopen ticket. Bug is fixed, IPv6/radvd is working again since public build 26622.

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Last edited by KrypteX on Wed Apr 01, 2015 19:02; edited 1 time in total
tatsuya46
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Joined: 03 Jan 2010
Posts: 7568
Location: YWG, Canada

PostPosted: Wed Apr 01, 2015 6:21    Post subject: Reply with quote
i think he was saying he followed the guide, without using any ipv6 dns servers, instead using ipv4 ones that have some link to ipv6 within them
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bdg2
DD-WRT User


Joined: 18 Apr 2013
Posts: 319

PostPosted: Wed Apr 01, 2015 18:54    Post subject: Reply with quote
tatsuya46 wrote:
i think he was saying he followed the guide, without using any ipv6 dns servers, instead using ipv4 ones that have some link to ipv6 within them


Correct.

I just let it talk to OpenDNS via IPv4 and it still all works.
blagdon
DD-WRT Novice


Joined: 04 May 2015
Posts: 9

PostPosted: Mon May 04, 2015 9:27    Post subject: Reply with quote
Thanks for the great guide, my IPV6 is working now but it's failing the ICMP test on http://ipv6-test.com/. i've tried completely turning off the firewall on both the router and my macbook but no luck. Any ideas guys? Could HE or my ISP be blocking them?

I'm running build 26653 on a Netgear WNDR3700v4
Mile-Lile
DD-WRT Guru


Joined: 24 Feb 2013
Posts: 1634
Location: Belgrade

PostPosted: Tue May 05, 2015 6:01    Post subject: Reply with quote
On the Administartion/Comannds tab save these as firewall script:

Code:
iptables -I INPUT 2 -s 66.220.2.74 -p icmp -j ACCEPT
ip6tables -I FORWARD 3 -p icmpv6 --icmpv6-type echo-request -j ACCEPT
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