[Openswan Users] openswan + l2tpd and pppd problem

[Tomasz Grzelak]

Stanislav Nedelchev wrote:

>here is my route -n
>root at fw:~# route -n
>Kernel IP routing table
>Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
>80.80.157.81    213.91.208.240  255.255.255.255 UGH   0      0       
>0 ipsec0 - this is road warrior connection
>192.168.0.205   0.0.0.0         255.255.255.255 UH    0      0        0 ppp0
>213.91.208.238  0.0.0.0         255.255.255.248 U     0      0        0 eth0
>213.91.208.238  0.0.0.0         255.255.255.248 U     0      0        0 ipsec0
>192.168.5.0     213.91.208.239  255.255.255.0   UG    0      0        0 ipsec0
>192.168.2.0     0.0.0.0         255.255.255.0   U     0      0        0 eth2
>192.168.0.0     0.0.0.0         255.255.255.0   U     0      0        0 eth1
>192.168.32.0    213.91.208.239  255.255.240.0   UG    0      0        0 ipsec0
>127.0.0.0       0.0.0.0         255.0.0.0       U     0      0        0 lo
>0.0.0.0         213.91.208.239  0.0.0.0         UG    1      0        0 eth0
>root at fw:~#
>
>root at fw:~# cat /proc/sys/net/ipv4/ip_forward
>1
>
>my mail server is in this differnet network and i can't access it
>because it is in different network.
>
>  
>
'tcpdump' is your friend...
run tcpdump on eth2 (tcpdump -fni eth2 "ip proto 1") and on your target 
server
next try to ping the server... see where packets go and arrive

this is very likely that echo-requests reach the server, but the server 
does not know where to send a response; see if the server knows where to 
send packets for network from requests are coming from

Tomasz Grzelak