troubleshooting Question

Centos 5: Firewall# 2

Avatar of tjie
tjieFlag for United States of America asked on
LinuxLinux NetworkingLinux Security
6 Comments3 Solutions913 ViewsLast Modified:

1) I have enterprise network (consisting of LAN 1 and LAN 2)
- LAN 1:
- LAN 2:
2) DC1
- It is a domain controller (Windows 2003, DNS server, DHCP servers, Wins server)
- Located at LAN 1
- Its IP is
- The domain is

3) DC2
-It is a replica domain controller [Windows 2003, Backup of DNS server, Backup of DHCP server, Wins server (replication partner with DC1)]
-Its IP is

4) XP1
- It is a client machine (Windows XP)
- It gets the IP address from DHCP servers
- It is at LAN 1

5) Centos_5
- It is a linux Machine (OS is Centos 5.3)
- It is at LAN 1
- The assigned IP address is
- Its DNS servers (or name servers are DC1 and DC2)
- I put the  DNS record at the DNS server of DC1 for this Centos_5

- It is a Routing and Remote Access Server
- It is a stand alone machine (Workgroup; it is not in the domain)

7) XP2
-It is a client machine
-It is at LAN 2

8) The Status
- From any machine, I can ping Centos_5 by its IP address (
- From Centos_5, I can ping DC1 (by its name "DC1"), Dc2, XP1, etc

9) The Goal: To check the Firewall status of this Centos_5

10) Action:
- I am at [root@CENTOS_5 ~]#
- I go to " cd /etc/sysconfig "; so i will be at [root@CENTOS_5 sysconfig]#
- Then, I type in " ./iptables --list "
- The message: "bash: ./iptables : permission denied (and i am logging in as "root" already)

11) Any help?

Join the community to see this answer!
Join our exclusive community to see this answer & millions of others.
Unlock 3 Answers and 6 Comments.
Join the Community
Learn from the best

Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.

Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 3 Answers and 6 Comments.
Try for 7 days

”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.

-Mike Kapnisakis, Warner Bros