[Cialug] Firewall question

[Paul Gray]

It sounds like your problem is that you're not enabling IP forwarding. The solution is to fire up tcpdump on the firewall and see were packets are getting stopped

-Paul Gray

> On Mar 6, 2017, at 4:24 PM, Tom Sellers <tsellers2009 at gmail.com> wrote:
> 
> I am trying to insert a firewall between my cable modem and my wireless
> access point.  The firewall is just a computer running a linux variant.
> (Devil
> 
> I can ping the outside world from the firewall machine keyboard and resolve
> pings such as "ping www.yahoo.com" fine. The problem is that none of the
> machines connected to the wireless access point either by wire or wireless
> have any address resolution or internet access.
> 
> Right now I have the network attached to my existing network for testing.
> 
> For example:    Existing home network ---- firewall machine --- new
> wireless router --- 3 test machines (two wireless and 1 cabled)
> 
> The firewall gets a DHCP address from my existing network as it would from
> my cable provider.  The other side of the firewall is set up with a fixed
> IP connected to one of the ports on the new wireless router (192.168.9.254)
> (wireless router is 192.168.9.1).
> 
> I am not that familiar with all the command line IP commands but can verify
> the IPs of the various devices.  it seems to me there is a route missing
> that prevents the internal IP from talking to the external IP of the
> firewall.
> 
> Anyone out there that can enlighten me as a somewhat inexperienced linux
> user?
> _______________________________________________
> Cialug mailing list
> Cialug at cialug.org
> http://cialug.org/mailman/listinfo/cialug
>