Networking Problem

Thomas A. Condon tomc
Mon May 17 11:29:06 PDT 2004 

Folks,

I have three linux boxes connected to a hub.  One is the firewall for my 
network to reach the outside, and is therefore the gateway for the others.  
The firewall (SuSE 7.3) can ping both the workstation (SuSE 7.3) and the 
laptop (RH 7.2), and they can both ping it, but they can not ping each other.

I see inconsistencies between the routing tables as returned by route 
(see below), but nothing that keeps either machine from pinging the firewall.
So I don't see why they can't ping each other.

Any help would be appreciated.

Ifconfig on the workstation returns:
eth0      Link encap:Ethernet  HWaddr 00:10:5A:0A:BE:F7
          inet addr:192.168.13.4  Bcast:192.168.13.255  Mask:255.255.255.0
          inet6 addr: fe80::210:5aff:fe0a:bef7/10 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:65 errors:0 dropped:0 overruns:0 frame:0
          TX packets:205 errors:0 dropped:0 overruns:0 carrier:0tnt2.sea1.da.uu
          collisions:0 txqueuelen:100
          RX bytes:7550 (7.3 Kb)  TX bytes:23733 (23.1 Kb)
          Interrupt:10 Base address:0xbc00

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:179 errors:0 dropped:0 overruns:0 frame:0
          TX packets:179 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:15896 (15.5 Kb)  TX bytes:15896 (15.5 Kb)

route for the workstation returns:
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
blanket.condoni *               255.255.255.255 UH    0      0        0 eth0
loopback        *               255.255.255.0   U     0      0        0 lo
192.168.13.0    blanket.condoni 255.255.255.0   UG    0      0        0 eth0
192.168.13.0    *               255.255.255.0   U     0      0        0 eth0
default         gungadin.condon 0.0.0.0         UG    0      0        0 eth0

ifconfig for the workstation returns:
eth0      Link encap:Ethernet  HWaddr 00:10:5A:0A:BE:F7
          inet addr:192.168.13.5  Bcast:192.168.13.255  Mask:255.255.255.0
          inet6 addr: fe80::210:5aff:fe0a:bef7/10 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:118 errors:0 dropped:0 overruns:0 frame:0
          TX packets:354 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0
          RX bytes:11328 (11.0 Kb)  TX bytes:26322 (25.7 Kb)
          Interrupt:10 Base address:0xbc00

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:444 errors:0 dropped:0 overruns:0 frame:0
          TX packets:444 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:36198 (35.3 Kb)  TX bytes:36198 (35.3 Kb)



route for the laptop returns:
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
chapeau.condoni *               255.255.255.255 UH    0      0        0 eth0
192.168.13.0    *               255.255.255.0   U     0      0        0 eth0
127.0.0.0       *               255.0.0.0       U     0      0        0 lo
default         gungadin.condon 0.0.0.0         UG    0      0        0 eth0

ifconfig for the firewall returns:
eth0      Link encap:Ethernet  HWaddr 00:04:5A:43:BF:61
          inet addr:192.168.13.1  Bcast:192.168.13.255  Mask:255.255.255.0
          inet6 addr: fe80::204:5aff:fe43:bf61/10 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:7569 errors:45 dropped:0 overruns:0 frame:48
          TX packets:4791 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          RX bytes:1349393 (1.2 Mb)  TX bytes:599894 (585.8 Kb)
          Interrupt:5 Base address:0xfc00

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:450 errors:0 dropped:0 overruns:0 frame:0
          TX packets:450 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:39832 (38.8 Kb)  TX bytes:39832 (38.8 Kb)

ppp0      Link encap:Point-to-Point Protocol
          inet addr:63.26.62.199  P-t-P:206.115.157.2  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST DYNAMIC  MTU:1524  Metric:1
          RX packets:71270 errors:0 dropped:0 overruns:0 frame:0
          TX packets:82004 errors:0 dropped:513 overruns:0 carrier:0
          collisions:0 txqueuelen:3
          RX bytes:55585377 (53.0 Mb)  TX bytes:7177064 (6.8 Mb)

route for the firewall returns:
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
gungadin.condon *               255.255.255.255 UH    0      0        0 eth0
[isp DNS server] *               255.255.255.255 UH    0      0        0 ppp0
loopback        *               255.255.255.0   U     0      0        0 lo
192.168.13.0    gungadin.condon 255.255.255.0   UG    0      0        0 eth0
192.168.13.0    *               255.255.255.0   U     0      0        0 eth0
default         [isp DNS server] 0.0.0.0         UG    0      0        0 ppp0




In Harmony's Way and In A Chord,

Tom  ;-})

Thomas A. Condon
Barbershop Bass Singer
Left Handed and In My Right Mind
Registered Linux User #154358

Vegetarian, a Native American word for "poor hunter".

More information about the Linux-users mailing list