Hmm, I think this and Andre's message will solve all my problems. Thanks. Here goes. Santos. On Tue, 2003-02-04 at 01:51, Ken Kilgore wrote: > This is what I am doing. I have dhcp for my external ip address assignment. > > EXTIP=`/sbin/ifconfig "$EXTIF" | grep inet | cut -d":" -f 2 | cut -d" " -f > 1` > INTIP=`/sbin/ifconfig "$INTIF" | grep inet | cut -d":" -f 2 | cut -d" " -f > 1` > > Ken Kilgore > > -----Original Message----- > From: netfilter-admin@lists.netfilter.org > [mailto:netfilter-admin@lists.netfilter.org]On Behalf Of saint > Sent: Monday, February 03, 2003 7:42 AM > To: Netfilter Mailing List > Subject: RE: iptables grep problems > > > Hi Khanh, > > I already have #!/bin/bash. My firewall script works. When > I first learnt how to build one everyone was saying use eth0. > But I have now learnt to dynamically configure eth0. > I know how to print out the info from the command line but > when I include the same command in my script all hell breaks lose. > And the { print $2 } bit -> you should see what it does. > > Santos > > On Tue, 2003-02-04 at 00:34, Khanh Tran wrote: > > Are you trying to assign your external interface's IP to a variable for > > something? What does $2 look like? Chances are you are trying to do > > something with $2 as an IP, but really the value is probably set for > > "addr:1.2.3.4". You may also want to add a #!/bin/bash, or whatever your > > shell is to the top of the script if you are getting the right variable > > assignment. > > > > Khanh Tran > > Network Operations > > Sarah Lawrence College > > > > -----Original Message----- > > From: saint [mailto:nagajuna@optushome.com.au] > > Sent: Monday, February 03, 2003 8:14 AM > > To: Netfilter Mailing List > > Subject: iptables grep problems > > > > > > Hi all, > > > > It seems I'm in a bit of a bother. Here's my problem: > > I have a semi-permanent IP address provided by my ISP > > and I can't do one of two things: > > 1. use eth0, and > > 2. use a combination of grep, awk, & ifconfig. > > > > Normally, if I issue this from the bash shell: > > > > $ifconfig eth0 | grep 'inet addr' | awk '{print $2}' > > > > I get the intended result i.e the external interface's IP address. > > So why can't I get anything when I put this in the firewall script? > > Actually, I do get something: ERRORS! > > > > If someone would kindly help me with this problem > > and relieve my suffering it'll be very much appreciated. > > > > Thanks. > > > > Santos. > > Still learning. > > > > > > > > >
