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Re: [Openvpn-users] ping woes


  • Subject: Re: [Openvpn-users] ping woes
  • From: "Julio Maidanik" <juliomaidanik@xxxxxxxxxxx>
  • Date: Tue, 4 May 2004 11:12:36 -0300

Hi,
 
Routing is done by the kernel, so it is only required to enable it.
Assuming that your kernel has been compiled with routing capability, your  
proc/sys/net/ipv4/ip_forward containing 1
does that.
But I assume that routing is working, otherwise your LAN would not have access to the Internet. 
 
You could check whether your "ping" is going out the external interface by
tcpdump -i eth1
If you have an ADSL connection, the outgoing packets are ppp, so it is better to use
tcpdump -i ppp0
 
My guess is that your problem is at the firewall.
I will suggest you to add logging to your firewall rules, where packets might be droped.
Also it is a good idea to add catchall logging rules, before packets fall into the default policy DROP.
 
 
Good luck!
 
Julio
////////////////////////////////////
 
----- Original Message -----
Sent: Tuesday, May 04, 2004 5:23 AM
Subject: RE: [Openvpn-users] ping woes

Sorry, all my servers are running linux with the 2.4.25 kernel. I am running the firewall as stated on the openvpn HOWTO. should I be running some routing between NIC's ?
 
 
John
 

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