Regarding Linux (RedHat v7.2/2.4.7-10 Kernel) and Echolink!

From: Bill Walton (cbyji.cpkg@mail.dy.fi)
Date: Thu Jan 02 2003 - 00:17:13 EET

  • Next message: Kelly Black: "Re: Regarding Linux (RedHat v7.2/2.4.7-10 Kernel) and Echolink!"

    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

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