how configure iptables

[manu.]

hai everybody out there
now i am forced to do a iptable configuration and the requrements are
it shuld get connection from our dubai server (2or 3 static ips)
also get connection from local static ip (proxyserver 2or 3 ips)
all other networks shuld be blocked
what is these prerouting,postrouting&forward chains. is i need to configure that?

i know it's long but it is critical, so can you help me or just tried to solve it out

[Irithori]

This is (again) a very vague question.
The answer depends on your network infrastructure.

But this should provide you with background knowledge.
netfilter/iptables project homepage - Documentation about the netfilter/iptables project

[Ghansham]

hai everybody out there
now i am forced to do a iptable configuration and the requrements are
it shuld get connection from our dubai server (2or 3 static ips)
also get connection from local static ip (proxyserver 2or 3 ips)
all other networks shuld be blocked
what is these prerouting,postrouting&forward chains. is i need to configure that?

i know it's long but it is critical, so can you help me or just tried to solve it out

You would need to configure ur iptables (firewall) then enter your rules depend on which permission you give for other network permission.

you can also disable ur ip forwarding rule

echo 1 > /proc/sys/net/ipv4/ip_forward

depend on you. if you can diasable for use 0 or enable for 1 enter



Regards,

Ghansham

[manu.]

sir,
actually what is mean by this forward rule?is it nessesary for my internet connection,what happens
when i am blocking my forward rule. expecting results in simple way