[CentOS] How to find your IP Address

Thu Apr 27 13:36:29 UTC 2006
King, John (Greg) (LMIT-HOU) <Greg.King at lmit.com>

/sbin/ifconfig -a  
1. check the logs in /var/log for helpfull data.
2. iptables may be your culprit. by default it will block incoming smb
connections from your windows systems to that linux system. So you will
need to modify /etc/sysconfig/iptables to allow the ports and protocols
into your linux server otherwise they will just get dropped. You can
probably browse from the linux box to a windows network (as iptables
allows outbound connections from the system by default) but not
Your next question may be how to modify IP tables to allow in smb
man iptables
cp /etc/sysconfig/iptables /etc/sysconfig/iptables.orig
vi /etc/sysconfig/iptables
add some entries like this (i am unsure of the smb ranges needed so I am
using 135 as an example although I think the range is 135-139 and 445)
where x.x.x.x is the workstation you want to trust the connection from.
Depending on what smb needs you may need udp and/or tcp entries in
iptables to allow in the traffic.
-A RH-Firewall-1-INPUT -s x.x.x.x -m state --state NEW -m tcp -p tcp
--dport 135 -j ACCEPT
-A RH-Firewall-1-INPUT -s x.x.x.x -p udp -m udp --dport 135 -j ACCEPT
Issue /etc/init.d/iptables restart to make the changes active.


	From: centos-bounces at centos.org
[mailto:centos-bounces at centos.org] On Behalf Of Chris Peikert
	Sent: Thursday, April 27, 2006 8:17 AM
	To: 'CentOS mailing list'
	Subject: [CentOS] How to find your IP Address

	Ok guys a quick newb question. I have been reading up on the Red
Hat Enterprise 4 for dummies book along with installing and playing with
the configurations of Cent OS 4. I have yet been able to find any
information on how to find out what your IP address is. I have it set to
use DHCP from our Windows server and I looked under the network card
configuration settings but can not find any command or GUI place that
will show your IP Address. When I go to a windows machine and try to
ping the Cent box by its name it cant find the host. Now I know I can go
into the DHCP server but I need to learn how to find it on the Linux


	Another question has to deal with Samba. I set up samba using
the GUI interface then ran  service smb start command to start up samba.
The book says I should be able to browse the network with a windows
machine now and find the linux box but I am unable to. Any clues why its
not showing up on the network?

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