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Re: [Openvpn-users] Unable to open socket client to server subnet


  • Subject: Re: [Openvpn-users] Unable to open socket client to server subnet
  • From: Charles Duffy <cduffy@xxxxxxxxxxx>
  • Date: Tue, 10 Oct 2006 09:43:20 -0500

Brett Serkez wrote:
> <snip>
>> I doubt very much this was a kernel issue. More likely there's a
>> difference in default firewall configuration between the two 
>> distributions.
> 
> Absolutely not.  I reviewed the configurations line by line and also
> ran with and without iptables active.  Most of my work was with the
> firewall off, I only turned it back on once all was working.
> 
> Once I have the Fedora box ready to be retired, I'll try back reving
> the kernel and retesting.
> 
> I do not discount some other differences in the distos, but what else
> would effect how packets pass thru a given Linux system?

There's iptables; ebtables; the routing table; the settings in 
/proc/sys/net/ipv4/ip_forward (and its interface-specific 
equivalents)... and that's pretty much all that comes to mind off the 
top of my head.

ebtables is pretty new and almost never on by default -- so if you 
cleared iptables from the equation and the routing tables were set up 
equivalently on both sides, the ip_forward settings in /proc are 
probably the likely suspects.
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