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iptables beginner question about ACCEPT

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http://unix.stackexchange.com – I'm just reading up on iptables, finally. I'm a little confused because the input chain from the filter table (as installed, fedora 17), looks like this: target prot opt source destination ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED ACCEPT icmp -- anywhere anywhere ACCEPT all -- anywhere anywhere ACCEPT udp -- anywhere 224.0.0.251 state NEW udp dpt:mdns REJECT all -- anywhere anywhere reject-with icmp-host-p (HowTos)

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Submitted by missing on 10/18/2012

Stories similar to iptables beginner question about ACCEPT

My table rules:

sudo iptables -L --line-numbers

Chain INPUT (policy ACCEPT) num target prot opt source destination 1 ACCEPT tcp -- anywhere anywhere tcp dpt:http 2 ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED 3 ACCEPT icmp -- anywhere anywhere 4 ACCEPT all -- anywhere

IPTABLES and d-link 26 weeks 1 day ago

I have a router "d-link 2760u". My computer acting like media server for tv (mediatomb).

I can't undestand something..

I have the following rule,which i believe will restrict icmp packets to 1/s.

I was setting up my iptables when I performed a iptables -F and my ssh pipe broke.

This is the last output of my session:

root@alfapaints:~# iptables -L Chain INPUT (policy DROP) target prot opt source destination ACCEPT all -- anywhere anywhere ACCEPT tcp -- anywhere anywhere state NEW,ESTABLISHED tcp dpt:222

I have the follwing iptables rules:

Chain INPUT (policy DROP) target prot opt source destination ACCEPT tcp -- anywhere anywhere tcp dpt:ssh ACCEPT tcp -- anywhere anywhere tcp dpt:http ACCEPT tcp -- anywhere anywhere tcp dpt:https ACCEPT tcp -- localhost.localdomain anywher

Printer is connected via USB to server PC running OpenSUSE 11.1 Client PCs are running 11.1, XP, Vista No problem printing from the Windoze machines

Printing is trouble free with the 11.1 client's firewall disabled, but no printer is available with firewall running.

open Ports in IP tables 3 years 16 weeks ago

Hi I would like to open some port from IN to OUT

pop3,smtp. whenever i tried to add some rules to existing iptables it gives me an error Applying iptables firewall rules: iptables-restore: line 21 failed

I am using the Cent OS 5.3

how do i open the ports?

INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0]

If I forward port 5764 to port 80 to my VOIP device, I can nmap and get a proper connection. If I forward port 5764 to port 22 to my server, it comes up filtered. It even happens if I try forwarding port 80 to my server. So I'm sure it has something to do with my server, but I'm not sure.

Here's my Linksys iptables:

Code: :wanin - [0:0]

Gcool wrote:Plain old iptables will do just fine.