Red Hat

Hi Gurus,

I am facing an issue with firewalls on one of my Linux Box.

Issue : Port 8001 looks open to me and there is a weblogic process running on it

Code:

netstat -alnp | grep 8001
tcp        0      0 ::ffff:3.20.247.165:8001    :::*                        LISTEN      28768/java

Code:

lsof -ni tcp:8001
COMMAND   PID   USER   FD   TYPE    DEVICE SIZE NODE NAME
java    28768 xxxxxxx  362u  IPv6 348588617       TCP 3.20.247.165:vcom-tunnel (LISTEN)

but when I try to connect to that port externally I am not able to I tested using telnet to check that but failed. it said could not connect. Can you suggest how to check if this port is blocked outside the OS .

Thanks In Advance.
Rama Krishna.

First, check to see if you can connect to that port when logged into the same server.

For example. telnet localhost 8001

Neo Thanks for the response. I tried to telnet but no luck.

Do you have an entry in /etc/sysconfig/iptables like this? If not, do add that before the FORWARD chain begins and restart the iptables service:

Code:

-A INPUT -m state --state NEW -m tcp -p tcp --dport 8001 -j ACCEPT

To check if a port is open or not on a remote machine, you have a very versatile tool called "nmap". RedHat repository has this tool and you can install it with yum.

Thanks Guys for the responses. I found the issue under the iptables files the order of entry was not correct . I fixed it and its working

Cheers!!