Subj : Re: blocking most IPs (newbie question) To : comp.os.linux From : ibuprofin Date : Tue Nov 09 2004 05:55 pm In article , Eric Peterson wrote: >I'm setting up a linux box for backing up computers in our office. The box >is on a local IP behind a firewall so I'm pretty confident that it is not >visible to the world. However, I do no our office computers are visible to >computers in nearby offices within the same organization. I'd like to block >out all incoming connections except those within our office (a very limited >range of IPs). I've been googling for howtos a bit, but I don't really even >know where to get started or just what to search for. Any suggestions? 85507 Aug 20 2001 Firewall-HOWTO 155096 Jan 23 2004 Security-HOWTO 278012 Jul 23 2002 Security-Quickstart-HOWTO >(using Debian, no GUI) /sbin/iptables Section 5.2.2 of the Security-Quickstart-HOWTO should tell you what you need. I _WOULD_ recommend reading all three documents however. If they're not on your system, grab a copy from http://en.tldp.org/HOWTO/HOWTO-INDEX/howtos.html Old guy .