Re: [ipv6] Odd behaviour...

Re: [ipv6] Odd behaviour...

[Andrew Morton]

On Tue, 27 May 2008 00:58:30 +0200 Ian Kumlien <pomac@vapor.com> wrote:

> Hi, 
> 
> I just recently acquired a new ipv6 tunnel since my two previous brokers
> has gone out of business. I now use hurricane electrics tunnel since i
> have really good ping times to it's node in Amsterdam.
> 
> Anyways, i have setup a local network tunnel and enabled forwarding.
> 
> After about 300 seconds, it all stops working. I have to disable and
> re-enable it on the firewall/router to get it working again.
> 
> tcpdump shows the router/firewall doing odd things like:
> (i renamed my host to piv6)
> 
> 00:48:14.294173 IP6 piv6 > igloo.stacken.kth.se: ICMP6, echo request,
> seq 321, length 64
> 
> 00:48:14.341288 IP6 igloo.stacken.kth.se > piv6: ICMP6, echo reply, seq
> 321, length 64
> 
> 00:48:14.341317 IP6 fe80::55e4:1b90 > igloo.stacken.kth.se: ICMP6,
> redirect, piv6 to piv6, length 160
> 
> 00:48:14.341332 IP6 igloo.stacken.kth.se > piv6: ICMP6, echo reply, seq
> 321, length 64
> ---
> 
> fe80::55e4::1b90 is the local ip of the ipv6 tunnel.
> (note: the packet never arrives at it's destination)
> 
> Any ideas of what could be going wrong?			

(cc netdev - afaik linux-net is kind of dead)

What kernel version are you running?

Re: [ipv6] Odd behaviour...

[pomac]

On Thu, May 29, 2008 at 12:27:29AM -0700, Andrew Morton wrote:
> On Tue, 27 May 2008 00:58:30 +0200 Ian Kumlien <pomac@vapor.com> wrote:
> 
> > Hi, 
> > 
> > I just recently acquired a new ipv6 tunnel since my two previous brokers
> > has gone out of business. I now use hurricane electrics tunnel since i
> > have really good ping times to it's node in Amsterdam.
> > 
> > Anyways, i have setup a local network tunnel and enabled forwarding.
> > 
> > After about 300 seconds, it all stops working. I have to disable and
> > re-enable it on the firewall/router to get it working again.
> > 
> > tcpdump shows the router/firewall doing odd things like:
> > (i renamed my host to piv6)
> > 
> > 00:48:14.294173 IP6 piv6 > igloo.stacken.kth.se: ICMP6, echo request,
> > seq 321, length 64
> > 
> > 00:48:14.341288 IP6 igloo.stacken.kth.se > piv6: ICMP6, echo reply, seq
> > 321, length 64
> > 
> > 00:48:14.341317 IP6 fe80::55e4:1b90 > igloo.stacken.kth.se: ICMP6,
> > redirect, piv6 to piv6, length 160
> > 
> > 00:48:14.341332 IP6 igloo.stacken.kth.se > piv6: ICMP6, echo reply, seq
> > 321, length 64
> > ---
> > 
> > fe80::55e4::1b90 is the local ip of the ipv6 tunnel.
> > (note: the packet never arrives at it's destination)
> > 
> > Any ideas of what could be going wrong?			
> 
> (cc netdev - afaik linux-net is kind of dead)

Thanks, i knew i missed something, -net was the one that was already in
my email client so... =)

> What kernel version are you running?

The router/fw is running 2.6.25.1, the client is running 2.6.25.4

Any additional information i should provide?

Re: [ipv6] Odd behaviour...

[Andrew Morton]

On Thu, 29 May 2008 10:41:57 +0200 pomac@vapor.com wrote:

> On Thu, May 29, 2008 at 12:27:29AM -0700, Andrew Morton wrote:
> > On Tue, 27 May 2008 00:58:30 +0200 Ian Kumlien <pomac@vapor.com> wrote:
> > 
> > > Hi, 
> > > 
> > > I just recently acquired a new ipv6 tunnel since my two previous brokers
> > > has gone out of business. I now use hurricane electrics tunnel since i
> > > have really good ping times to it's node in Amsterdam.
> > > 
> > > Anyways, i have setup a local network tunnel and enabled forwarding.
> > > 
> > > After about 300 seconds, it all stops working. I have to disable and
> > > re-enable it on the firewall/router to get it working again.
> > > 
> > > tcpdump shows the router/firewall doing odd things like:
> > > (i renamed my host to piv6)
> > > 
> > > 00:48:14.294173 IP6 piv6 > igloo.stacken.kth.se: ICMP6, echo request,
> > > seq 321, length 64
> > > 
> > > 00:48:14.341288 IP6 igloo.stacken.kth.se > piv6: ICMP6, echo reply, seq
> > > 321, length 64
> > > 
> > > 00:48:14.341317 IP6 fe80::55e4:1b90 > igloo.stacken.kth.se: ICMP6,
> > > redirect, piv6 to piv6, length 160
> > > 
> > > 00:48:14.341332 IP6 igloo.stacken.kth.se > piv6: ICMP6, echo reply, seq
> > > 321, length 64
> > > ---
> > > 
> > > fe80::55e4::1b90 is the local ip of the ipv6 tunnel.
> > > (note: the packet never arrives at it's destination)
> > > 
> > > Any ideas of what could be going wrong?			
> > 
> > (cc netdev - afaik linux-net is kind of dead)
> 
> Thanks, i knew i missed something, -net was the one that was already in
> my email client so... =)

Yeah.  linux-net _might_ be a hive of activity, dunno.  I haven't been
there in years.  Perhaps it should be retired.

> > What kernel version are you running?
> 
> The router/fw is running 2.6.25.1, the client is running 2.6.25.4
> 
> Any additional information i should provide?

It would be interesting if you know of any earlier kernel version which
works OK?

Re: [ipv6] Odd behaviour...

[pomac]

On Thu, May 29, 2008 at 01:51:31AM -0700, Andrew Morton wrote:
> On Thu, 29 May 2008 10:41:57 +0200 pomac@vapor.com wrote:
> 
> > On Thu, May 29, 2008 at 12:27:29AM -0700, Andrew Morton wrote:
> > > On Tue, 27 May 2008 00:58:30 +0200 Ian Kumlien <pomac@vapor.com> wrote:
> > > 
> > > > Hi, 
> > > > 
> > > > I just recently acquired a new ipv6 tunnel since my two previous brokers
> > > > has gone out of business. I now use hurricane electrics tunnel since i
> > > > have really good ping times to it's node in Amsterdam.
> > > > 
> > > > Anyways, i have setup a local network tunnel and enabled forwarding.
> > > > 
> > > > After about 300 seconds, it all stops working. I have to disable and
> > > > re-enable it on the firewall/router to get it working again.
> > > > 
> > > > tcpdump shows the router/firewall doing odd things like:
> > > > (i renamed my host to piv6)
> > > > 
> > > > 00:48:14.294173 IP6 piv6 > igloo.stacken.kth.se: ICMP6, echo request,
> > > > seq 321, length 64
> > > > 
> > > > 00:48:14.341288 IP6 igloo.stacken.kth.se > piv6: ICMP6, echo reply, seq
> > > > 321, length 64
> > > > 
> > > > 00:48:14.341317 IP6 fe80::55e4:1b90 > igloo.stacken.kth.se: ICMP6,
> > > > redirect, piv6 to piv6, length 160
> > > > 
> > > > 00:48:14.341332 IP6 igloo.stacken.kth.se > piv6: ICMP6, echo reply, seq
> > > > 321, length 64
> > > > ---
> > > > 
> > > > fe80::55e4::1b90 is the local ip of the ipv6 tunnel.
> > > > (note: the packet never arrives at it's destination)
> > > > 
> > > > Any ideas of what could be going wrong?			
> > > 
> > > (cc netdev - afaik linux-net is kind of dead)
> > 
> > Thanks, i knew i missed something, -net was the one that was already in
> > my email client so... =)
> 
> Yeah.  linux-net _might_ be a hive of activity, dunno.  I haven't been
> there in years.  Perhaps it should be retired.

Heh, i'll look in the archives... =)

> > > What kernel version are you running?
> > 
> > The router/fw is running 2.6.25.1, the client is running 2.6.25.4
> > 
> > Any additional information i should provide?
> 
> It would be interesting if you know of any earlier kernel version which
> works OK?

Well, for me it was ages since i used ipv6... So i can't really help. I
was more hoping for someone in the same position or someone who'd seen
something simular and solved it.

>From what i gather, i have done nothing wrong and a forward shouldn't
time out. Ie, if it works it should keep working.

It would be really interesting to see what the other end of a ipv6
tunnel sees when it pings, but i don't have the means to test that
currently.

Re: [ipv6] Odd behaviour...

[YOSHIFUJI Hideaki / 吉藤英明]

In article <20080529084157.GD11812@pomac.netswarm.net> (at Thu, 29 May 2008 10:41:57 +0200), pomac@vapor.com says:

> On Thu, May 29, 2008 at 12:27:29AM -0700, Andrew Morton wrote:
> > On Tue, 27 May 2008 00:58:30 +0200 Ian Kumlien <pomac@vapor.com> wrote:
> > 
> > > Hi, 
> > > 
> > > I just recently acquired a new ipv6 tunnel since my two previous brokers
> > > has gone out of business. I now use hurricane electrics tunnel since i
> > > have really good ping times to it's node in Amsterdam.
> > > 
> > > Anyways, i have setup a local network tunnel and enabled forwarding.
> > > 
> > > After about 300 seconds, it all stops working. I have to disable and
> > > re-enable it on the firewall/router to get it working again.
> > > 
> > > tcpdump shows the router/firewall doing odd things like:
> > > (i renamed my host to piv6)
> > > 
> > > 00:48:14.294173 IP6 piv6 > igloo.stacken.kth.se: ICMP6, echo request,
> > > seq 321, length 64
> > > 
> > > 00:48:14.341288 IP6 igloo.stacken.kth.se > piv6: ICMP6, echo reply, seq
> > > 321, length 64
> > > 
> > > 00:48:14.341317 IP6 fe80::55e4:1b90 > igloo.stacken.kth.se: ICMP6,
> > > redirect, piv6 to piv6, length 160
> > > 
> > > 00:48:14.341332 IP6 igloo.stacken.kth.se > piv6: ICMP6, echo reply, seq
> > > 321, length 64
> > > ---
> > > 
> > > fe80::55e4::1b90 is the local ip of the ipv6 tunnel.
> > > (note: the packet never arrives at it's destination)
> > > 
> > > Any ideas of what could be going wrong?			
> > 
> > (cc netdev - afaik linux-net is kind of dead)
> 
> Thanks, i knew i missed something, -net was the one that was already in
> my email client so... =)
> 
> > What kernel version are you running?
> 
> The router/fw is running 2.6.25.1, the client is running 2.6.25.4
> 
> Any additional information i should provide?

How do you assign the address?

--yoshfuji

Re: [ipv6] Odd behaviour...

[pomac]

On Thu, May 29, 2008 at 06:28:53PM +0900, YOSHIFUJI Hideaki / 吉藤英明 wrote:
> In article <20080529084157.GD11812@pomac.netswarm.net> (at Thu, 29 May 2008 10:41:57 +0200), pomac@vapor.com says:
> 
> > On Thu, May 29, 2008 at 12:27:29AM -0700, Andrew Morton wrote:
> > > On Tue, 27 May 2008 00:58:30 +0200 Ian Kumlien <pomac@vapor.com> wrote:
> > > 
> > > > Hi, 
> > > > 
> > > > I just recently acquired a new ipv6 tunnel since my two previous brokers
> > > > has gone out of business. I now use hurricane electrics tunnel since i
> > > > have really good ping times to it's node in Amsterdam.
> > > > 
> > > > Anyways, i have setup a local network tunnel and enabled forwarding.
> > > > 
> > > > After about 300 seconds, it all stops working. I have to disable and
> > > > re-enable it on the firewall/router to get it working again.
> > > > 
> > > > tcpdump shows the router/firewall doing odd things like:
> > > > (i renamed my host to piv6)
> > > > 
> > > > 00:48:14.294173 IP6 piv6 > igloo.stacken.kth.se: ICMP6, echo request,
> > > > seq 321, length 64
> > > > 
> > > > 00:48:14.341288 IP6 igloo.stacken.kth.se > piv6: ICMP6, echo reply, seq
> > > > 321, length 64
> > > > 
> > > > 00:48:14.341317 IP6 fe80::55e4:1b90 > igloo.stacken.kth.se: ICMP6,
> > > > redirect, piv6 to piv6, length 160
> > > > 
> > > > 00:48:14.341332 IP6 igloo.stacken.kth.se > piv6: ICMP6, echo reply, seq
> > > > 321, length 64
> > > > ---
> > > > 
> > > > fe80::55e4::1b90 is the local ip of the ipv6 tunnel.
> > > > (note: the packet never arrives at it's destination)
> > > > 
> > > > Any ideas of what could be going wrong?			
> > > 
> > > (cc netdev - afaik linux-net is kind of dead)
> > 
> > Thanks, i knew i missed something, -net was the one that was already in
> > my email client so... =)
> > 
> > > What kernel version are you running?
> > 
> > The router/fw is running 2.6.25.1, the client is running 2.6.25.4
> > 
> > Any additional information i should provide?
> 
> How do you assign the address?

On the router/fw there is a sit tunnel thats started with 'ip'.

The clients get their addresses by radvd which only uses a local
interface on the router/fw...

> --yoshfuji

Re: [ipv6] Odd behaviour...

[YOSHIFUJI Hideaki / 吉藤英明]

In article <20080529100822.GF11812@pomac.netswarm.net> (at Thu, 29 May 2008 12:08:22 +0200), pomac@vapor.com says:

> On Thu, May 29, 2008 at 06:28:53PM +0900, YOSHIFUJI Hideaki / 吉藤英明 wrote:
> > In article <20080529084157.GD11812@pomac.netswarm.net> (at Thu, 29 May 2008 10:41:57 +0200), pomac@vapor.com says:
> > 
> > > On Thu, May 29, 2008 at 12:27:29AM -0700, Andrew Morton wrote:
> > > > On Tue, 27 May 2008 00:58:30 +0200 Ian Kumlien <pomac@vapor.com> wrote:
> > > > 
> > > > > Hi, 
> > > > > 
> > > > > I just recently acquired a new ipv6 tunnel since my two previous brokers
> > > > > has gone out of business. I now use hurricane electrics tunnel since i
> > > > > have really good ping times to it's node in Amsterdam.
> > > > > 
> > > > > Anyways, i have setup a local network tunnel and enabled forwarding.
> > > > > 
> > > > > After about 300 seconds, it all stops working. I have to disable and
> > > > > re-enable it on the firewall/router to get it working again.
> > > > > 
> > > > > tcpdump shows the router/firewall doing odd things like:
> > > > > (i renamed my host to piv6)
> > > > > 
> > > > > 00:48:14.294173 IP6 piv6 > igloo.stacken.kth.se: ICMP6, echo request,
> > > > > seq 321, length 64
> > > > > 
> > > > > 00:48:14.341288 IP6 igloo.stacken.kth.se > piv6: ICMP6, echo reply, seq
> > > > > 321, length 64
> > > > > 
> > > > > 00:48:14.341317 IP6 fe80::55e4:1b90 > igloo.stacken.kth.se: ICMP6,
> > > > > redirect, piv6 to piv6, length 160
> > > > > 
> > > > > 00:48:14.341332 IP6 igloo.stacken.kth.se > piv6: ICMP6, echo reply, seq
> > > > > 321, length 64
> > > > > ---
> > > > > 
> > > > > fe80::55e4::1b90 is the local ip of the ipv6 tunnel.
> > > > > (note: the packet never arrives at it's destination)
> > > > > 
> > > > > Any ideas of what could be going wrong?			
> > > > 
> > > > (cc netdev - afaik linux-net is kind of dead)
> > > 
> > > Thanks, i knew i missed something, -net was the one that was already in
> > > my email client so... =)
> > > 
> > > > What kernel version are you running?
> > > 
> > > The router/fw is running 2.6.25.1, the client is running 2.6.25.4
> > > 
> > > Any additional information i should provide?
> > 
> > How do you assign the address?
> 
> On the router/fw there is a sit tunnel thats started with 'ip'.
> 
> The clients get their addresses by radvd which only uses a local
> interface on the router/fw...

Please draw w a network topology figure.

--yoshfuji

Re: [ipv6] Odd behaviour...

[pomac]

On Thu, May 29, 2008 at 07:46:16PM +0900, YOSHIFUJI Hideaki / 吉藤英明 wrote:
> In article <20080529100822.GF11812@pomac.netswarm.net> (at Thu, 29 May 2008 12:08:22 +0200), pomac@vapor.com says:
> 
> > On Thu, May 29, 2008 at 06:28:53PM +0900, YOSHIFUJI Hideaki / 吉藤英明 wrote:
> > > In article <20080529084157.GD11812@pomac.netswarm.net> (at Thu, 29 May 2008 10:41:57 +0200), pomac@vapor.com says:
> > > 
> > > > On Thu, May 29, 2008 at 12:27:29AM -0700, Andrew Morton wrote:
> > > > > On Tue, 27 May 2008 00:58:30 +0200 Ian Kumlien <pomac@vapor.com> wrote:
> > > > > 
> > > > > > Hi, 
> > > > > > 
> > > > > > I just recently acquired a new ipv6 tunnel since my two previous brokers
> > > > > > has gone out of business. I now use hurricane electrics tunnel since i
> > > > > > have really good ping times to it's node in Amsterdam.
> > > > > > 
> > > > > > Anyways, i have setup a local network tunnel and enabled forwarding.
> > > > > > 
> > > > > > After about 300 seconds, it all stops working. I have to disable and
> > > > > > re-enable it on the firewall/router to get it working again.
> > > > > > 
> > > > > > tcpdump shows the router/firewall doing odd things like:
> > > > > > (i renamed my host to piv6)
> > > > > > 
> > > > > > 00:48:14.294173 IP6 piv6 > igloo.stacken.kth.se: ICMP6, echo request,
> > > > > > seq 321, length 64
> > > > > > 
> > > > > > 00:48:14.341288 IP6 igloo.stacken.kth.se > piv6: ICMP6, echo reply, seq
> > > > > > 321, length 64
> > > > > > 
> > > > > > 00:48:14.341317 IP6 fe80::55e4:1b90 > igloo.stacken.kth.se: ICMP6,
> > > > > > redirect, piv6 to piv6, length 160
> > > > > > 
> > > > > > 00:48:14.341332 IP6 igloo.stacken.kth.se > piv6: ICMP6, echo reply, seq
> > > > > > 321, length 64
> > > > > > ---
> > > > > > 
> > > > > > fe80::55e4::1b90 is the local ip of the ipv6 tunnel.
> > > > > > (note: the packet never arrives at it's destination)
> > > > > > 
> > > > > > Any ideas of what could be going wrong?			
> > > > > 
> > > > > (cc netdev - afaik linux-net is kind of dead)
> > > > 
> > > > Thanks, i knew i missed something, -net was the one that was already in
> > > > my email client so... =)
> > > > 
> > > > > What kernel version are you running?
> > > > 
> > > > The router/fw is running 2.6.25.1, the client is running 2.6.25.4
> > > > 
> > > > Any additional information i should provide?
> > > 
> > > How do you assign the address?
> > 
> > On the router/fw there is a sit tunnel thats started with 'ip'.
> > 
> > The clients get their addresses by radvd which only uses a local
> > interface on the router/fw...
> 
> Please draw w a network topology figure.

It's very basic... 

client -> router/fw -tap-tunnel-> -hurricane-electric-> internet.

(the firewall/router is my normal ipv4 firewall but for ipv6 it acts as
a router, thus the "router/fw" or "firewall/router".

but, router/fw -tap-tunnel-> -hurricane->electric-> internet. always
works, and outgoing communications always works. This is only a problem
for incoming communications.

> --yoshfuji