RE: Machine not pinging properly

["John Jones" <johnj mindquake com>]

Guys,

I had the exact same trouble.  I found that it wasn't any sort of configuration,
but in the routing tables.  I did not have this out-of-the-box bug with any
other version of RedHat at all.  Installing 7.0 configured everything exactly as
it should have.  6.2 just seemed to have a problem with route tables.

Try deleting the HOST entries in your route table using the 'route del addr
xxx.xxx.xxx.xxx mask 255.255.255.xxx dev eth0' (check that command with 'man
route'!!!!  That is from memory!) and pinging again.

Kevin Colby and I worked on this a bit, and I finally gave up and installed 7.0,
which worked straight out of the box with NO configuration.


John Jones
Systems Administrator
Mindquake Software, Inc.
Vancouver, BC

-----Original Message-----
From: redhat-install-list-admin redhat com
[mailto:redhat-install-list-admin redhat com]On Behalf Of Linux Netcomp
Sent: Monday, October 02, 2000 4:45 AM
To: redhat-install-list redhat com
Subject: Re: Machine not pinging properly


    Hi... I'm experiencing same trouble. But I'm using both Realtek 8139 and
NetGear.
    When I ping my own interface from this linux box, it works properly. When I
ping a computer that is behind my WAN or LAN from my linux box, it replyes with
a delay of 4 seconds and lost some packets. But if I ping this linux box from a
computer that is behind my LAN or WAN, it works properly without delay and do
not lost any packets.
    If I use another protocol like ftp or http from my linux box it works ok,
only the ICMP protocol with ping tool is losting packets. I do not have any
filter in my box, I only use the ipchains masquerading rule.
    Please, if anybody here knows how can I do to solve this problem, I will be
grateful.

===========================================================
   Ricardo Alexandre Trombetta - ricardot netcomp com br
 Linux Network Admin - Netcomp - Internet Service Provider
         MCP:1712433 - Conectiva Linux Certified
===========================================================


----- Original Message -----
From: "Drew Hunt" <pinowudi yahoo com>
To: <redhat-install-list redhat com>
Sent: Friday, September 29, 2000 7:10 PM
Subject: Machine not pinging properly


> This is a question about my other RH6.2 machine that I
> am setting up for IPmasquerading.
>
> This machine is set up with three NICs.  Here is the
> rundown:
>
> 3c509b (eth1) - Internal network
> netgear fa310tx (tulip/eth0) - external network
> d-link (ne compat./eth3) - external network testing
>
> IPchains policies set to ACCEPT, no other rules
> hosts.allow and hosts.deny have no entries
>
> Scenario:
>
> Ifconfig shows all three devices installed.  Pinging
> the internal network works dandy (3c509b).  Pinging
> the external network receives one response, then drops
> all following packets for both the d-link and the
> netgear NICs.  The d-link was used as an external NIC
> on another machine for a while and was added to this
> one for testing purposes since the netgear kept
> failing.  I use a Win98 machine through the same hub
> and router pair with no problems.
>
> I have already tried updating the drivers for the
> d-link and netgear NICs.  Currently, I am thinking
> that the problem lies in one of two places: 1) there
> is a problem with the system setup that is
> ignoring/blocking the incoming icmp packets (ipchains,
> but I turned it off), or 2) my connection is through a
> broadband modem that uses DHCP to establish my lease
> (I have a static IP, it is just assigned through DHCP
> protocol).
>
> Problem 1:
>
> I turned off IPchains and cleared out hosts.allow and
> .deny, so there should be no reason to block any
> incoming traffic.  Watching the hub lights indicates
> that there is traffic incoming, just not being
> received by my linux box.  Note that the situation is
> the same for a distant host and for pinging the IP of
> my broadband modem.  Internal network (192.168.x.x)
> pinging works fine.
>
> Problem 2:
>
> I was thinking that DHCP leasing might be the problem
> and that the broadband modem just would't recognize my
> box since I manually assigned the IP, mask, gateway
> and DNS.  I know the information is correct because
> they are the same as the values I scavanged from my
> Win box when I used it with DHCP.  However, I have
> since manually set my IP information on the Win box
> and it works just fine!  I double-checked the
> information on both machines to make sure they
> matched.  You'd think the Win box would have the same
> problems.  So...
>
> I'm thoroughly confused.  Does anybody have any ideas
> as to what the problem is or how to fix it?
>
> Thanks,
> Drew
> pinowudi yahoo com
>
>
>
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