RE: IPTABLES and EBTABLES

[Errol Mangwiro]

your commands are for iptables not ebtables. another way you could do this is to use system-config-firewall to setup masquerading and a stock set of rules for you since you’re not familiar with netfilter, and then add your custom rules later.


From: Lázaro Morales
Sent: ‎31‎ ‎October‎ ‎2012 ‎3‎:‎39‎ ‎PM
To: users at lists.fedoraproject.org
Subject: IPTABLES and EBTABLES



Hello,

How can be used EBTABLES in addition to IPTABLES to forward traffic
 from an internal LAN to an external?

Suppose that I have an internal LAN with private IPs, and a Gateway
that control the traffic to the outside, and I only need forward traffic
for certain MAC address regardless IP address.


       INTERNET  --> Gateway <--- LAN

I'm not sure if I have to enable the following modules in `sysctl.conf`:
   net.bridge.bridge-nf-call-iptables = 0
   net.bridge.bridge-nf-call-arptables = 0

I have tried with the following configuration, but nothing happens:

# ebtables -F
# ebtables -t nat -F
# ebtables -P INPUT ACCEPT
# ebtables -P OUTPUT ACCEPT
# ebtables -P FORWARD ACCEPT
# ebtables -A FORWARD -i eth0 -o eth1 -j ACCEPT
# ebtables -t nat -A POSTROUTING -s INTERNAL_LAN_CLIENT_MAC -o eth1 \
            -j snat --to-source MAC_OF_EXTERNAL_GATEWAY_INTERFACE

Any thought will be highly appreciated.
Thanks in advance,
Lázaro.

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