[Ubuntu-BR] Problema com roteamento feito pro livecdrouter

[Flávio Alexandre]

Prezados boa tarde

Estou com problema no seguinte ambiente, tenho 2 predios interligados com
uma antena wireless, rodando livecdrouter. Um dos prédios recebe a Internet
( velox ), com isso compartilho a conexao com as subredes, tenho squid3 e
iptables rodando. A internet funciona perfeitamente, porem tenho uma
aplicação desktop ( openfire ) que roda em uma porta especifica ( 5222), os
clientes que estão antes da bridge feita pelo livecdrouter funcionam
perfeitamente, podem os clientes pós esse roteamente não conseguem
conectar...

tentei esboçar um desenho simples para maior entendimento, abaixo segue as
configurações de ambos os roteadores...ip, rotas, regras iptables...

fiz da seguinte forma as conexao que tem origem do clinete B faço um DNAT
no router B para o router A, que por sua vez faço para o gateway de saída
para a Internet. Se alguem aqu ina lista usar esse tipo de solução ou puder
me ajudar fico grato.

[cliente B ] -> [ router B ] <wireless> [ router A ] -> [cliente A] ->
[gateway( velox) ]

##################################################################################################

PONTA A

root em cdrouter:~#  ifconfig
eth0      Link encap:Ethernet  HWaddr 00:50:04:AC:8F:B0
          inet addr:172.16.1.5  Bcast:172.16.255.255  Mask:255.255.255.0

eth1      Link encap:Ethernet  HWaddr 00:50:04:78:11:0F
          inet addr:192.168.31.11  Bcast:192.168.31.14  Mask:255.255.255.240


root em cdrouter:~# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use
Iface
192.168.31.160  172.16.1.2      255.255.255.240 UG    0      0        0 eth0
192.168.31.0    0.0.0.0         255.255.255.240 U     0      0        0 eth1
192.168.31.192  172.16.1.2      255.255.255.224 UG    0      0        0 eth0
172.16.1.0      0.0.0.0         255.255.255.0   U     0      0        0 eth0
127.0.0.0       0.0.0.0         255.0.0.0       U     0      0        0 lo
0.0.0.0         172.16.1.1      0.0.0.0         UG    0      0        0 eth0

root em cdrouter:~# iptables -nL -t nat
Chain PREROUTING (policy ACCEPT)
target     prot opt source               destination
DNAT       tcp  --  0.0.0.0/0            0.0.0.0/0          tcp dpt:5222
to:192.168.31.1

Chain POSTROUTING (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination

##################################################################################################

PONTA B

root em cdrouter:~# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:90:CC:2F:28:6D
          inet addr:192.168.31.193  Bcast:192.168.31.223
 Mask:255.255.255.224

wlan0     Link encap:Ethernet  HWaddr 00:0E:2E:24:7A:9C
          inet addr:172.16.1.2  Bcast:172.16.255.255  Mask:255.255.255.0

root em cdrouter:~# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use
Iface
192.168.31.0    172.16.1.5      255.255.255.240 UG    0      0        0
wlan0
192.168.31.192  0.0.0.0         255.255.255.224 U     0      0        0 eth0
172.16.1.0      0.0.0.0         255.255.255.0   U     0      0        0
wlan0
127.0.0.0       0.0.0.0         255.0.0.0       U     0      0        0 lo
0.0.0.0         172.16.1.1      0.0.0.0         UG    0      0        0
wlan0

root em cdrouter:~# iptables -t nat -nL
Chain PREROUTING (policy ACCEPT)
target     prot opt source               destination
DNAT       tcp  --  0.0.0.0/0            0.0.0.0/0          tcp dpt:5222
to:192.168.31.11

Chain POSTROUTING (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination

##################################################################################################

-- 
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 °v°   Flávio Alexandre dos Reis
/(  )\  Juiz de Fora - MG
 ^ ^
Linux user #481115
Ubuntu user #24388