integrate a ppp-connected PC to my LAN. arp problem?



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integrate a ppp-connected PC to my LAN. arp problem?

Postby Ekkard Gerlach » Thu, 30 Nov 2006 01:39:16 GMT

I want to integrate a remote PC "ted" connectet by ppp to my LAN 
(192.168.0.x). The interface is to the remote PC is:  The 220 is the remote PC. I can ping to. I 
can ssh to. But trying to connect to my LAN by DSL by ssh tunnel from 
somewhat else, I can't reach the PC that is connected by ppp.

rex3:~ # route -n
Kernel IP routing table
Destination     Gateway    Genmask   Flags Metric Ref    Use Iface UH    0      0        0 ippp2   U     0      0        0 eth0     U     0      0        0 eth0       U     0      0        0 lo         UG    0      0        0 eth0

I already completed arp-table:
rex3:~ # arp -Ds ippp2 netmask pub
rex3:~ # arp -a
rex2 ( at 00:06:7B:03:94:21 [ether] on eth0
easy ( at 00:50:8D:6C:64:F1 [ether] on eth0
? ( at * PERM PUP on eth0
ted ( at * PERM PUP on ippp2

PC easy is accessible, its a PC in my LAN.

any hints?

Re: integrate a ppp-connected PC to my LAN. arp problem?

Postby Ekkard Gerlach » Thu, 30 Nov 2006 01:48:35 GMT

my ssh-tunnel from somewhere in internet:
ssh -f -L 1122:  XXXX@XXXXX.COM  sleep 20;ssh -p 
1122 root@localhost

Re: integrate a ppp-connected PC to my LAN. arp problem?

Postby Ekkard Gerlach » Thu, 30 Nov 2006 02:12:42 GMT

Its not the fault of the ssh-tunnel! I can't get a ping-connection from 
other PC in my LAN to ted like easy ( either!

Re: integrate a ppp-connected PC to my LAN. arp problem?

Postby Ekkard Gerlach » Thu, 30 Nov 2006 03:58:35 GMT

solution found on my own: iptables -t nat -A POSTROUTING -o ippp2 -j 


Re: integrate a ppp-connected PC to my LAN. arp problem?

Postby Clifford Kite » Thu, 30 Nov 2006 03:58:38 GMT

Pppd will automatically configure proxy arp on eth0 when the proxyarp
option is used.  And it's eth0 on rex3 that must take care of arps from
the LAN for, not ippp2.

Clifford Kite

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