topic Re: disable the firewall in Operating System - Linux

disable the firewall

peterchu — Wed, 19 May 2004 03:37:51 GMT

I have newly installed a linux , but can run telnet , as I know , the default setting is enable the firewall , so the serve is denied to be telnet , how to disable the firewall ? thx.

Re: disable the firewall

Mobeen_1 — Wed, 19 May 2004 03:54:21 GMT

Peter,
I am sorry. Are you trying to ask how to disable telnet from your Linux server? Please clarify

regards
Mobeen

Re: disable the firewall

Claudio Cilloni — Wed, 19 May 2004 03:57:29 GMT

try running this:

# service iptables stop

this will disable the firewall. remeber that the telnet service could be disabled. verify with this command:

# chkconfig --list

hth,
Claudio

Re: disable the firewall

Rgomes — Wed, 19 May 2004 04:11:10 GMT

Hi,

It should be:

iptables -F
service iptables stop <----stop f/w

if you want to start it again, then
service iptables start

regards
Richard

Re: disable the firewall

peterchu — Wed, 19 May 2004 05:25:36 GMT

I stopped the iptables , but still can't , do I need to stop anything ( like any daemon ) after stop the system services ( like iptables ) ? thx.

Re: disable the firewall

peterchu — Wed, 19 May 2004 05:37:28 GMT

I even move the iptables to other name and then reboot, i use chkconfig --list , it is not in the list , now this server can ping to outside but can't run telnet , what is wrong ? thx.

Re: disable the firewall

Rgomes — Wed, 19 May 2004 06:02:34 GMT

Hi,

Can you ssh this linux box? You can use any ssh client like putty. (It's free, search google).

regards,
Richard

Re: disable the firewall

Claudio Cilloni — Wed, 19 May 2004 06:37:43 GMT

the command chkconfig --list should list the telnet service in the 'xinetd based services' (bottom part of its output).
If telnet isn't listed there, then you haven't the telnet-server installed. If it is so, find the telnet-server-xxxx.rpm file and install it.

what linux distribution are you using?

Ciao
Claudio

Re: disable the firewall

Juno — Wed, 19 May 2004 07:57:09 GMT

I use RH 9,

The server can telnet to other remote hosts now , but the remote hosts can ping/telnet to this host , I have move the iptables and then reboot and checked that no iptables services is running , could suggest what is wrong ? thx.

Re: disable the firewall

Rgomes — Wed, 19 May 2004 08:18:17 GMT

Hi,

I guess, for ping you have to have entry in /etc/hosts file:

host_name

and for telnet, pls check:
xinetd instead of inetd. xinetd does not use /etc/inetd.conf, but rather a directory called /etc/xinetd.d with individual files in there for each service.

These are text files and can be edited with VI or any other editor. If you make a change to a file or add a new file, don't forget to restart xinetd with /etc/rc.d/init.d/xinetd restart.

Regards,
Richard

Re: disable the firewall

Vernon Brown_4 — Wed, 19 May 2004 19:57:50 GMT

If you have telnet installed you may need to enable it by going to:

/etc/xinetd.d/

Check if telnet is there; if so edit it and change disable = yes to disable = no

Re: disable the firewall

Steven E. Protter — Wed, 19 May 2004 21:47:49 GMT

After you follow Vernon's instructions,

service xinetd restart

Then Vernon's settings will be active.

Please consider assigning points to those who tried to help you.

SEP

Re: disable the firewall

Naveej.K.A — Wed, 19 May 2004 22:22:05 GMT

hi,

how about renaming the /etc/securetty to /etc/securetty.old

Reboot the server

I think by default, linux when installed will allow to telnet from the console only

with best wishes
Naveej

Re: disable the firewall

Marco_113 — Thu, 20 May 2004 08:35:30 GMT

You can try to see with command:
netstat -an if the telnet daemon is listening on port 23 or not.
If it's not present it's not running!
Marco