[LUG.ro] Porque no rutea estas dirección?

[Horacio Castellini]

Hola experimentando el protocolo 41 con 6to4 (encamsulación ipv6 a ipv4) 
en una red interna no rutea la máquina firewall los paquetes enviados a 

194.95.108.191

porque?

pues por ejemplo en el firewall conectado a internet por dial-up (llamada 
clara)

[hcaste@clara hcaste]$  /usr/sbin/ping6 www.jp.freebsd.org
PING www.jp.freebsd.org(3ffe:501:185b:101:2a0:24ff:fe57:e561) 56 data 
bytes
64 bytes from 3ffe:501:185b:101:2a0:24ff:fe57:e561: icmp_seq=1 ttl=54 
time=898 ms
64 bytes from 3ffe:501:185b:101:2a0:24ff:fe57:e561: icmp_seq=2 ttl=54 
time=1059 ms
64 bytes from 3ffe:501:185b:101:2a0:24ff:fe57:e561: icmp_seq=3 ttl=54 
time=1059 ms
64 bytes from 3ffe:501:185b:101:2a0:24ff:fe57:e561: icmp_seq=6 ttl=54 
time=1119 ms

--- www.jp.freebsd.org ping statistics ---
7 packets transmitted, 4 received, 42% loss, time 6028ms
rtt min/avg/max/mdev = 898.412/1034.581/1119.981/82.356 ms, pipe 2
[hcaste@clara hcaste]$ 


por el iptraf estos paquetes van a dicha ipv4, en cambio en la máquina de 
la LAN

[hcaste@oscura hcaste]$ ping6 www.jp.freebsd.org
PING6(56=40+8+8 bytes) 2002:c0a8:10b:1::1 --> 
3ffe:501:185b:101:2a0:24ff:fe57:e561
^C
--- www.jp.freebsd.org ping6 statistics ---
20 packets transmitted, 0 packets received, 100% packet loss
[hcaste@oscura hcaste]$ ping 194.95.108.191
PING 194.95.108.191 (194.95.108.191): 56 data bytes
^C
--- 194.95.108.191 ping statistics ---
23 packets transmitted, 0 packets received, 100% packet loss

No pasa ni en pedo. Pero probando otro host si anda como ser:

[hcaste@oscura hcaste]$ ping eva           
PING eva.fceia.unr.edu.ar (200.3.123.187): 56 data bytes
64 bytes from 200.3.123.187: icmp_seq=0 ttl=241 time=1091.365 ms
64 bytes from 200.3.123.187: icmp_seq=2 ttl=241 time=1036.682 ms
64 bytes from 200.3.123.187: icmp_seq=3 ttl=241 time=876.772 ms
64 bytes from 200.3.123.187: icmp_seq=4 ttl=241 time=956.814 ms
^C
--- eva.fceia.unr.edu.ar ping statistics ---
6 packets transmitted, 4 packets received, 33% packet loss
round-trip min/avg/max/stddev = 876.772/990.408/1091.365/81.202 ms

Porque? no es trasparente esa dirección en particular?

pues:

[hcaste@oscura hcaste]$ host 6to4.ipv6.fh-regensburg.de
6to4.ipv6.fh-regensburg.de has address 194.95.108.191
6to4.ipv6.fh-regensburg.de has address 2002:c25f:6cbf:1::1

es mi nodo server en ipv6.