First,
I'd like to configure my system to forward ip, to act as a gateway for
my network. I've always used a script during startup to do this:
echo 1 > /proc/sys/net/ipv4/ip_forward
iptables -t nat -A POSTROUTING -o ${UPLINK} -j SNAT --to ${IP_NAT}
This works fine, however I want this permanent so I don't have to run
the script on startup. I have the firewall setup with SNAT fine, but
when I write the file /etc/sysconfig/network with the line
'FORWARD_IPV4=YES' it still doesn't enable the ip forwarding after boot?
cat /proc/sys/net/ipv4/ip_forward
0
So how do I do this?
Second,
In DHCP, you can specify multiple DNS servers:
option domain-name-servers 10.0.0.1, 10.0.0.2, 10.0.0.3;
can you also do this with routers?
option routers 10.0.0.1 10.0.0.2;
so that if one is down, the network PC's can fail over to another?