www.arin.net

[Larry J. Blunk]

Ross W wrote:
>
>     > Anyone else have problems establishing a connection to
>     www.arin.net <http://www.arin.net>
>     > (2001:500:4:1::80) with their web browser?   Telnetting to port
>     80 seems
>     > to work fine.   Possible MTU issues?
>
>     I get nowhere.  Network seems gone...
>
>
> Working fine for us:
>
> traceroute6 to www.arin.net <http://www.arin.net> (2001:500:4:1::80) 
> from 2610:38:1::e, 64 hops max, 12 byte packets
>  1  * * * (filtered)
>  2  tunnel13.6bb1.nyy-newyork.ipv6.teleglobe.net 
> <http://tunnel13.6bb1.nyy-newyork.ipv6.teleglobe.net>  20.462 ms  
> 21.261 ms  20.274 ms
>  3  if-1-0.mcore3.mtt-montreal.ipv6.teleglobe.net 
> <http://if-1-0.mcore3.mtt-montreal.ipv6.teleglobe.net>  26.489 ms  
> 28.006 ms  27.078 ms
>  4  if-3-0.core2.nto-newyork.ipv6.teleglobe.net 
> <http://if-3-0.core2.nto-newyork.ipv6.teleglobe.net>  34.798 ms  
> 34.419 ms  35.089 ms
>  5  2001:5a0:600:100::1  39.697 ms  40.023 ms  40.218 ms
>  6  2001:5a0:600::5  40.455 ms  38.845 ms  40.057 ms
>  7  equi6ix-ash.ipv6.us.occaid.net 
> <http://equi6ix-ash.ipv6.us.occaid.net>  67.639 ms  65.188 ms  63.028 ms
>  8  arin-gw1.customer.occaid.net 
> <http://arin-gw1.customer.occaid.net>  65.517 ms  62.415 ms  62.236 ms
>  9  * * *
>  

      Yes, traceroute works fine for us.  It's the tcp connection that's 
the problem.
Here's my tcpdump.  Note the missing tcp segment from www.arin.net for
1:1428.


tcpdump -n tcp port 80
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
10:58:51.709311 IP6 2001:468:1400:2:290:27ff:fea3:5e15.50372 > 
2001:500:4:1::80.80: S 3124068887:3124068887(0) win 5760 <mss 
1440,sackOK,timestamp 84015296 0,nop,wscale 2>
10:58:51.848974 IP6 2001:500:4:1::80.80 > 
2001:468:1400:2:290:27ff:fea3:5e15.50372: S 3011910318:3011910318(0) ack 
3124068888 win 5712 <mss 1440,sackOK,timestamp 2106186350 
84015296,nop,wscale 2>
10:58:51.849010 IP6 2001:468:1400:2:290:27ff:fea3:5e15.50372 > 
2001:500:4:1::80.80: . ack 1 win 1440 <nop,nop,timestamp 84015331 
2106186350>
10:58:51.849185 IP6 2001:468:1400:2:290:27ff:fea3:5e15.50372 > 
2001:500:4:1::80.80: P 1:414(413) ack 1 win 1440 <nop,nop,timestamp 
84015331 2106186350>
10:58:51.988172 IP6 2001:500:4:1::80.80 > 
2001:468:1400:2:290:27ff:fea3:5e15.50372: . ack 414 win 1696 
<nop,nop,timestamp 2106186490 84015331>
10:58:51.990131 IP6 2001:500:4:1::80.80 > 
2001:468:1400:2:290:27ff:fea3:5e15.50372: P 1429:2167(738) ack 414 win 
1696 <nop,nop,timestamp 2106186490 84015331>
10:58:51.990149 IP6 2001:468:1400:2:290:27ff:fea3:5e15.50372 > 
2001:500:4:1::80.80: . ack 1 win 1440 <nop,nop,timestamp 84015367 
2106186490,nop,nop,sack 1 [|tcp]>