iptables to block ip address

[yanty]

i have 4 computers of address range..
PC1:10.0.0.2 PC2:10.0.0.1 PC3:10.1.0.1 PC4:10.1.0.2

how do i use iptables to prevent ip address of PC1 from pinging to PC4.

thank you.

[MrCobaltBlue]

I believe its something like:

iptables -A INPUT-p icmp -s 10.0.0.2 -d 10.1.0.2 -j DROP

I might be wrong its been a while since I've used iptables, but give that a shot.

[mummaneni]

Hi,

Implement this rule on PC4

iptables -A INPUT -s 10.0.0.2 -p icmp --icmp-type echoo-request -j REJECT

This prevents pinging to PC4 from PC1 but not vice versa.

Regards,
mummaneni

[vjeyaram]

Dear Sir,

I want to give a browsing rights to the m/c having ip address is 192.168.0.4 only the following sites.

IP ADDRESS OF THE SITES ARE

61.0.0.70
203.90.124.66
203.90.124.65

How can I set a IPTABLES RULE

PLEASE HELP ME

[amitsharma_26]

We need further inputs ...
1. At which box are you running your firewall ? (ip )
2. What is your basic setup ? (how are these boxes connected with the firewall box ?)
3. How do you provide your clients to surf internet ? (through proxy or packet forwarding)