Sponsored Content
Full Discussion: iptables changes
Special Forums IP Networking iptables changes Post 302385319 by rina5392 on Thursday 7th of January 2010 07:49:22 PM
Old 01-07-2010
iptables changes

Hello

We have one linux machine in the office which happens to be an important firewall. I just know the basics and need to make one change

Essentially it is forward mysql traffic to another internal machine.

This is the original rule (forward to 192.20.0.17) which is working


Code:
$IPTABLES -A tcp_packets -p TCP -s 0/0 --dport 3306 -j allowed
$IPTABLES -t nat -A PREROUTING -p TCP -i $INET_IFACE -d $STATIC_IP --dport 3306 -j DNAT --to-destination 192.20.0.17
$IPTABLES -A FORWARD -p tcp -i $INET_IFACE -o $LAN_IFACE -d 192.20.0.17 --dport 3306 -j allowed


and i just need to send it to 192.20.0.15 so i just change -->

Code:
$IPTABLES -A tcp_packets -p TCP -s 0/0 --dport 3306 -j allowed
$IPTABLES -t nat -A PREROUTING -p TCP -i $INET_IFACE -d $STATIC_IP --dport 3306 -j DNAT --to-destination 192.20.0.15
$IPTABLES -A FORWARD -p tcp -i $INET_IFACE -o $LAN_IFACE -d 192.20.0.15 --dport 3306 -j allowed

and restart the machine.

But this does not work. is there anything else that must be done ?

The 192.20.0.15 mysql is working as i can get telnet response from it.

Any assistance will be appreciated

Last edited by pludi; 01-08-2010 at 02:20 AM.. Reason: code tags, please...
 

10 More Discussions You Might Find Interesting

1. IP Networking

IPtables

Hey guys, I have just started using IP tables and was wondering if anyone could direct me to any good online resources as I am totally new to this. Thanks. (1 Reply)
Discussion started by: 182x
1 Replies

2. IP Networking

Need help with iptables

Trying to create a whitelist to limit bandwidth. My sync speed is 1536/256 kbps. Simple rules in order: 1. Do not limit (or set to 1536/256) MAC 00:00:00:00:00 (computer is in 192.168.1.0/24). 2. Do not limit (or set to 1536/256) MAC 00:00:00:00:01 (computer is in 192.168.1.0/24). 3. Do not... (1 Reply)
Discussion started by: kripz
1 Replies

3. IP Networking

Iptables

Thanks in advance I have to remove ip_tables_name from /proc/net/... i was trying to do so and getting the following error cmd : rm ip_tables_names error : rm: remove regular empty file `ip_tables_names'? y rm: cannot remove `ip_tables_names': Operation not permitted (4 Replies)
Discussion started by: sudeepiit
4 Replies

4. IP Networking

iptables assistance

I have a CentOS 5.2 (10.20.21.73) machine that I need help with configuring iptables. According to documentation I believe this line should allow all communication between my machine and another machine (other machine has no firewall) -A RH-Firewall-1-INPUT -s 10.20.21.12 -j ACCEPT #... (1 Reply)
Discussion started by: beaker457
1 Replies

5. IP Networking

Iptables

What should be the iptables rule so that only the subnet 64.61.11.224/255.255.255.248 may access the mysql port 3306 (1 Reply)
Discussion started by: proactiveaditya
1 Replies

6. UNIX for Dummies Questions & Answers

help with iptables

Hi, On the IPTABLES, I did iptables --flush. I want to start fresh. Now I only want two things. Allow one ip address to this server. Allow port 443 as incoming from every where. Please advice how to do this. This is what I did so for. iptables -I INPUT -i eth0 -s 1.2.3.4 -j ACCEPT... (5 Replies)
Discussion started by: samnyc
5 Replies

7. UNIX for Dummies Questions & Answers

Help with iptables

Hi, I just build a Linux server, I said yes to enable the firewall. I only choose SSH conneciton. When I check the iptables. I see all of this (see below). I want to reject every thing only allow SSH from subnet 192.168.1.xx. Can you advise, how to do. Chain RH-Firewall-1-INPUT (2... (2 Replies)
Discussion started by: samnyc
2 Replies

8. IP Networking

Help with iptables

photo... (1 Reply)
Discussion started by: beerpong1
1 Replies

9. Red Hat

iptables help for port 80

Hi I enable the IPtables but port 80 was not working. Below is my active configuration (10 Replies)
Discussion started by: ranjancom2000
10 Replies

10. Ubuntu

iptables

Hi I need help with an iptables configuration, this is what I have server A Server B A and B are using different gateways i am sending port 22 from A to B, I see the packages coming in B but B is not sending the package to internet. please give me some examples. (0 Replies)
Discussion started by: lmartinez073
0 Replies
iptables-apply(8)					      System Manager's Manual						 iptables-apply(8)

NAME
iptables-apply - a safer way to update iptables remotely SYNOPSIS
iptables-apply [-hV] [-t timeout] ruleset-file DESCRIPTION
iptables-apply will try to apply a new ruleset (as output by iptables-save/read by iptables-restore) to iptables, then prompt the user whether the changes are okay. If the new ruleset cut the existing connection, the user will not be able to answer affirmatively. In this case, the script rolls back to the previous ruleset after the timeout expired. The timeout can be set with -t. When called as ip6tables-apply, the script will use ip6tables-save/-restore instead. OPTIONS
-t seconds, --timeout seconds Sets the timeout after which the script will roll back to the previous ruleset. -h, --help Display usage information. -V, --version Display version information. SEE ALSO
iptables-restore(8), iptables-save(8), iptables(8). LEGALESE
iptables-apply is copyright by Martin F. Krafft. This manual page was written by Martin F. Krafft <madduck@madduck.net> Permission is granted to copy, distribute and/or modify this document under the terms of the Artistic License 2.0. 2006-06-04 iptables-apply(8)
All times are GMT -4. The time now is 09:25 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy