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RE: Network Config Problems

From: "Jeremy Rodriguez" <jrod cmsmechanical com>
To: <redhat-install-list redhat com>
Subject: RE: Network Config Problems
Date: Wed, 4 Feb 2004 11:43:14 -0500
if you like you can specify it, it might help:
ifconfig eth0 195.224.13.86 broadcast 195.224.13.255 gw 195.224.13.1 netmask
255.255.255.0 arp up

Why is the mac not showing? are you just showing 00 for the purposes of the
mail?
What happened with the tracroute?

-----Original Message-----
From: redhat-install-list-admin redhat com
[mailto:redhat-install-list-admin redhat com]On Behalf Of Tom Ford
Sent: Wednesday, February 04, 2004 11:26 AM
To: redhat-install-list redhat com
Subject: RE: Network Config Problems



> did you try "ifdown eth0" first?

Yes, just did that and then:


> what was "ifconfig -a" after that?

eth0      Link encap:Ethernet  HWaddr 00:00:00:00:00:00
          inet addr:195.224.13.86  Bcast:195.224.13.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:298 errors:0 dropped:0 overruns:0 frame:0
          TX packets:93 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          RX bytes:24115 (23.5 Kb)  TX bytes:5761 (5.6 Kb)
          Interrupt:5 Base address:0xd800

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:19 errors:0 dropped:0 overruns:0 frame:0
          TX packets:19 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1452 (1.4 Kb)  TX bytes:1452 (1.4 Kb)

> what was the routing table after that "netstat -rn"?

ernel IP routing table
Destination     Gateway       Genmask         Flags   MSS Window  irt Itace
195.224.13.0    0.0.0.0       255.255.255.0   U         0 0          0 eth0
169.254.0.0     0.0.0.0       255.255.0.0     U         0 0          0 eth0
127.0.0.0       0.0.0.0       255.0.0.0       U         0 0          0 lo
0.0.0.0         195.224.13.1  0.0.0.0         UG        0 0          0 eth0

There is no firewall on the outter network,

195.229.13.0 doesn't exsist.. should that top table look like this:

195.224.13.86    195.224.13.1      255.255.255.0   U     0 0      0 eth0

?

Thanks for all the help so far :)

,Tom
-----Original Message-----
From: redhat-install-list-admin redhat com
[mailto:redhat-install-list-admin redhat com] On Behalf Of Jeremy Rodriguez
Sent: 04 February 2004 16:05
To: redhat-install-list redhat com
Subject: RE: Network Config Problems

did you try "ifdown eth0" first?
what was "ifconfig -a" after that?
what was the routing table after that "netstat -rn"?


When you bring up the network interface try using a MTU of 1300, I have seen
where there is an issue with certain firewalls.
also try doing a traceroute:

"traceroute www.yahoo.com"

This should tell you where you are getting hung.


-----Original Message-----
From: redhat-install-list-admin redhat com
[mailto:redhat-install-list-admin redhat com]On Behalf Of Tom Ford
Sent: Wednesday, February 04, 2004 10:53 AM
To: redhat-install-list redhat com
Subject: RE: Network Config Problems


Sorry that should have been 'That seems NOT to work'!

-----Original Message-----
From: redhat-install-list-admin redhat com
[mailto:redhat-install-list-admin redhat com] On Behalf Of Tom Ford
Sent: 04 February 2004 15:37
To: redhat-install-list redhat com
Subject: RE: Network Config Problems

That seem to work, I tried pinging again, and it seems to detect the ip of
the destination.. i.e. if I ping ns1.iapbb.net

ping ns0.iapbb.net
PING ns0.iapbb.net (216.127.80.104) 56(84) bytes of data.


216.127.80.104 being the ip of the nameserver.. so its somehow getting out
to the www?

>>Try to configure all again:

ifconfig eth0 195.224.13.86 broadcast 195.224.13.255
netmask 255.255.255.0 up

and then, restart your eth0:
/etc/rc.d/init.d/network restart

-----Original Message-----
From: redhat-install-list-admin redhat com
[mailto:redhat-install-list-admin redhat com] On Behalf Of Manuel Aróstegui
Ramirez
Sent: 04 February 2004 14:42
To: redhat-install-list redhat com
Subject: RE: Network Config Problems

 --- Tom Ford <tom iapbb net> escribió: >
> > Are you able to ping the outside world?
> www.yahoo.com returns a ping.
>
> [root linux1 root]# ping www.yahoo.com
> PING www.yahoo.akadns.net (216.109.118.71) 56(84)
> bytes of data.
>
> No pings returned though;
>
> > What is your routing table look like?
>
> Kernel IP routing table
> Destination     Gateway         Genmask
> Flags   MSS Window  irtt
> Iface
> 195.224.13.0    0.0.0.0         255.255.255.0   U
>      0 0          0
> eth0
> 169.254.0.0     0.0.0.0         255.255.0.0     U
>      0 0          0
> eth0
> 127.0.0.0       0.0.0.0         255.0.0.0       U
>      0 0          0 lo
> 0.0.0.0         195.224.13.1    0.0.0.0         UG
>      0 0          0
> eth0
>
> > Maybe the default route is not there?
>
> eth0      Link encap:Ethernet  HWaddr
> 00:00:00:00:00:00
>           inet addr:195.224.13.86
> Bcast:195.224.13.255  Mask:255.255.255.0
>           UP BROADCAST RUNNING MULTICAST  MTU:1500
> Metric:1
>           RX packets:855 errors:0 dropped:0
> overruns:0 frame:0
>           TX packets:283 errors:0 dropped:0
> overruns:0 carrier:0
>           collisions:0 txqueuelen:100
>           RX bytes:65389 (63.8 Kb)  TX bytes:22384
> (21.8 Kb)
>           Interrupt:5 Base address:0xd800
>
> lo        Link encap:Local Loopback
>           inet addr:127.0.0.1  Mask:255.0.0.0
>           UP LOOPBACK RUNNING  MTU:16436  Metric:1
>           RX packets:19 errors:0 dropped:0
> overruns:0 frame:0
>           TX packets:19 errors:0 dropped:0
> overruns:0 carrier:0
>           collisions:0 txqueuelen:0
>           RX bytes:1452 (1.4 Kb)  TX bytes:1452 (1.4
> Kb)
>
> Hope this might shed some light,


Cheers

>
> -----Original Message-----
> From: redhat-install-list-admin redhat com
> [mailto:redhat-install-list-admin redhat com] On
> Behalf Of Jeremy Rodriguez
> Sent: 04 February 2004 14:14
> To: redhat-install-list redhat com
> Subject: RE: Network Config Problems
>
> I disagree with the ip_forwarding. You should only
> set this if you are
> routing.
> Are you able to ping the outside world?
> www.yahoo.com returns a ping.
> What is your routing table look like?
>  netstat -rn
> Maybe the default route is not there?
> also send the output of:
>  ifconfig -a
>
> -----Original Message-----
> From: redhat-install-list-admin redhat com
> [mailto:redhat-install-list-admin redhat com]On
> Behalf Of Chris Hewitt
> Sent: Wednesday, February 04, 2004 9:01 AM
> To: redhat-install-list redhat com
> Subject: Re: Network Config Problems
>
>
> Tom Ford wrote:
>
> > I'm having trouble getting a simple workstation
> box access the net.
> >
> > IP Addr: 195.224.13.86
> >
> > DNS Prm: 195.224.13.3
> >
> > DNS Scn: 195.224.13.140
> >
> > Gateway: 195.224.13.1
> >
> > This should be all okay, and upon pinging the
> machine from a windows
> > based machine I can get returns. I can SSH into
> the machine fine from
> > another pc on the same network.
> >
> > I cannot access the internet using mozillia on the
> machine, it says
> > connection is either refused or times out. I
> cannot SSH into the box
> > outside of the current local area network.
> >
> > I am I doing something wrong with regards to
> gateway? It seems to me
> > that the box is failing to find a route out to the
> good ol' www. I
> > have set this all up in the network config
> settings.
> >
> Have you set ip forwarding? This is needed to allow
> connections through
> the computer.
> echo 1>/proc/sys/net/ipv4/ip_forward
>
> HTH
> Chris
>
>
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=====
--

Manuel Aróstegui Linux user 200896

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Follow-Ups:
- RE: Network Config Problems
  - From: Tom Ford
References:
- RE: Network Config Problems
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