From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bill Walton Subject: Regarding Linux (RedHat v7.2/2.4.7-10 Kernel) and Echolink! Date: Wed, 01 Jan 2003 14:17:13 -0800 Sender: linux-hams-owner@vger.kernel.org Message-ID: <3E1368E9.7000505@kj6eo.com> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: List-Id: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: LINUX HAMS MAILING LIST Hello Everyone - Happy New Year! It is a beautiful day here in Southern California. The sun is shining, not a cloud in the sky, with a temp of 16 deg C. I am still beating myself senseless trying to get my RHv7.2 server set up so that Echolink will work on one of my LAN Windoze98 machines. I have tried endless combinations of "ipchains" rules along with "ipmasqadm" rules without any success at all. If I do a "ipchains -L -v -n" the output says that the "tcp" 5200 routing is correct, and that the udp 5198:5199 routing is correct, but it does'nt work. ACCEPT rules, FORWARDING rules, IPMASQADM rules, IPCHAINS rules, none of them work. Of course my demise is most likely due to the fact that I don't know what I am doing. I only have (3) years experience with Linux and IPCHAINS, IPMASQADM and so on are not my strong points. Using IPTABLES, I have the commands that will cure my ills, however I know absolutely NOTHING about IPTABLES ... so I need to draw on your vast knowledge base. The "iptables" commands necessary to make Echolink work are: Iptables -t nat -A PREROUTING -d (exit IP) -p udp --dport 5198 -i eth0 -j DNAT --to-destination (IP of machine where echolink resides) The above command is repeated of course for udp port 5199. IPtables has been compiled into my kernel but when I try to enter the above "iptables" command I get the following: /lib/modules/2.4.7-10/kernel/net/ipv4/netfilter/ip_tables.o: init_module: device or resource busy. I reset all the ipchains rules "ipchains -F" and turned ip_forwarding off but still get the same error. Also the same error if I try to load the NAT module: "modprobe iptable_nat" Does anyone have and suggestions that would help me resolve the errors and help me get everything set up properly? Your help is always appreciated! Regards, Bill KJ6EO