[Openswan Users] can browse internet, cannot ping with l2tpd/pppd

[David Bernick]

another interesting thing:

on the gateway, here are my settings:

eth0      Link encap:Ethernet  HWaddr 00:E0:81:21:E1:B0
          inet addr:10.51.0.199  Bcast:10.51.0.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:48095 errors:0 dropped:0 overruns:0 frame:0
          TX packets:12220 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:4768009 (4.5 Mb)  TX bytes:2636380 (2.5 Mb)
          Interrupt:10
 
eth1      Link encap:Ethernet  HWaddr 00:E0:81:21:E1:B1
          inet addr:66.xxx.xxx.xxx  Bcast:66.xxx.xxx.xxx  
Mask:255.255.255.248
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:36456 errors:0 dropped:0 overruns:0 frame:0
          TX packets:21417 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:6224088 (5.9 Mb)  TX bytes:5760198 (5.4 Mb)
          Interrupt:11 Base address:0x2000

ipsec0    Link encap:Ethernet  HWaddr 00:E0:81:21:E1:B1
          inet addr:66.xxx.xxx.xxx  Mask:255.255.255.248
          UP RUNNING NOARP  MTU:16260  Metric:1
          RX packets:445 errors:0 dropped:0 overruns:0 frame:0
          TX packets:241 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:10
          RX bytes:47042 (45.9 Kb)  TX bytes:27102 (26.4 Kb)
 

ppp0      Link encap:Point-to-Point Protocol
          inet addr:10.51.0.79  P-t-P:10.51.0.80  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1400  Metric:1
          RX packets:46 errors:0 dropped:0 overruns:0 frame:0
          TX packets:12 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3
          RX bytes:4471 (4.3 Kb)  TX bytes:144 (144.0 b)


When I am on the gateway and I ping 10.51.0.79, i get a response back. 
When I ping 10.51.0.80 i get a  Operation not permitted, implying that 
there is a firewalling problem here?

d