Re: tcp/ip

From: Richard Adams (sjell.rrqb@objetivosorocaba.g12.br)
Date: Mon Jan 22 2001 - 08:54:09 EET

  • Next message: Tomi Manninen: "Re: tcp/ip"

    On Mon, 22 Jan 2001, Rein Mann wrote:
    > Could anyone help with the following problem:
    >
    > What I try to achieve: Using tcp/ip (telnet, ping , ftp) straight from Linux.
    > What I have: RH 6.2, kernel 2.2.14-5 on pentium II 300
    > ax25 installed as modules, complete with mkiss etc.
    > With it I run successfully the following software: Xastir (aprs), Linpac (which
    > uses the ax25 utils files like listen and call)
    > By sending a kill sig to kissattach I can then run TNOS v 2.3 .
    >
    > When I try a telnet direct from a linux terminal to a 44.x.x.x address I get
    > the following msg.
    >
    > [root@reica /root]# telnet 44.136.138.1
    > Trying 44.136.138.1...
    > telnet: Unable to connect to remote host: No route to host
    >
    > Same happens with 'ping'
    >
    > The kernel routing table:
    >
    > [root@reica /root]# route
    > Kernel IP routing table
    > Destination Gateway Genmask Flags Metric Ref Use Iface
    > vk4rza.lan * 255.255.255.255 UH 0 0 0 ax0
    > vk4bvy-2.ampr.o * 255.255.255.255 UH 0 0 0 ax0
    > reica * 255.255.255.255 UH 0 0 0 eth0
    > 10.0.0.0 * 255.0.0.0 U 0 0 0 eth0
    > 127.0.0.0 * 255.0.0.0 U 0 0 0 lo
    > 44.0.0.0 vk4rza.lan 255.0.0.0 UG 0 0 0 ax0
    > 44.0.0.0 * 255.0.0.0 U 0 0 0 ax0

    Here is the first problem, you have 2 default routes for the whole ampr.org on
    ax0, the first one in the table will get used.
    So that means your system is sending out an arp and will do nothing untill
    vk4rza.lan.ampr.org answers the arp.

    >
    > the ifconfig cmd:
    >
    > [root@reica /root]# ifconfig
    > ax0 Link encap:AMPR AX.25 HWaddr VK4ALJ
    > inet addr:44.136.141.11 Mask:255.0.0.0
    > UP RUNNING MTU:255 Metric:1
    > RX packets:2 errors:0 dropped:0 overruns:0 frame:0
    > TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
    > collisions:0 txqueuelen:10

    Your system is hearing other stn(s), 2 packets have been received, you can use
    mheard to see who they are, if of course you have mheardd running.

    > the host file:
    >
    > 127.0.0.1 localhost
    > 10.0.1.1 reica reica.booyul
    > 10.0.1.2 seffie seffie.booyul
    > 203.17.118.2 mail.ion.com.au
    > 44.136.141.11 vk4alj.ampr.org
    > 203.17.118.7 ftp-proxy.ion.com.au
    > 44.136.138.1 vk4rzb
    > 44.136.141.100 vk4rza vk4rza.lan
    > 44.136.141.29 vk4bvy-2.ampr.org

    This could also be a problem, a normal entry in a hosts file would be;

    44.xx.xx.xx vk9xyz.ampr.org vk9xyz

    Quite possably that is upsetting ARP.

    >
    > [Mon Jan 22 12:39:47 2001]
    > Port 2: AX25: VK4ALJ->QST <UI> pid=ARP
    > ARP: len 30 hwtype AX25 prot 0x800 prlen 4 op REQUEST
    > sender hwaddr VK4ALJ
    > target

    Normally a arp should look like.

    scc3: fm PA3GCU-15 to QST ctl UI pid=CD(ARP) len 30
    ARP: len 30 hwtype AX25 prot IP op REQUEST
    sender IPaddr 44.137.28.48 hwaddr PA3GCU-15
    target IPaddr 44.137.28.27

    I would take a guess and say your hosts file is causing the arp problem,
    altho' i could be wrong.

    >
    > note: no target address. The same trace for a ping to any address.
    >
    > Where do I go wrong????? Address Resolution Protocol not doing its job??
    > Any pointers in the right direction will be gratefully received.
    >
    > --
    > r & c mann
    > po box 175
    > nerang 4211
    > syvgeetl@socorroisp.com
    > 

    -- 
Regards Richard
Happy New Year
ajhpubp.mduwyjwubm@ebcot.de
http://people.zeelandnet.nl/pa3gcu/

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