Local Network Problem
Don Henson
wepin-list at wepin.com
Tue Aug 28 23:27:15 UTC 2007
Eberhard Roloff wrote:
> Don Henson wrote:
>> To make a long background story short...
>>
>> In restoring from a major system crash, I ended up with a
>> server/workstation, a workstation, and a laptop (wifi) that should be
>> talking to each other over Ethernet. The laptop will not respond to a
>> ping from anybody and the other two will respond to each other's pings
>> if I use the domain address. They will not respond if I ping the
>> corresponding IP address. This seems backwards to me but that's the way
>> it is. At one point, I had all three machines talking but after
>> rebooting all three, the problem returned. I've been working on this for
>> a couple of days and now I find myself thoroughly confused. I have no
>> idea which files and logs might be useful. If you are interested in
>> helping, let me know what data you need and I'll post it forthwith. I'd
>> really appreciate a little help on this one.
>>
>> Don Henson
>>
> on each one:
>
> ifconfig eth0
> cat /etc/hosts
>
> then: Do you use a dhcp server for your machines? (For example, your
> router could be acting as such a server)
>
> do you use a firewall on all your machines or on specific machines?
>
> What does a packet sniffer, ex. ethereal show on your laptop, when you
> try to ping it from another machine.
>
> If you are working with fixed ip addresses, what happes if you connect
> only two machines via a crossover cable , i.e. leave out your swith and
> anthing else in between.
>
> kind regards
> Eberhard
>
>
Per your request...
For Earth-svr
dhenson at Earth-svr:~$ ifconfig
eth0 Link encap:Ethernet HWaddr 00:07:E9:9C:26:0B
inet addr:192.168.1.51 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::207:e9ff:fe9c:260b/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1676 errors:0 dropped:0 overruns:0 frame:0
TX packets:1260 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1110628 (1.0 MiB) TX bytes:200677 (195.9 KiB)
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:25 errors:0 dropped:0 overruns:0 frame:0
TX packets:25 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2536 (2.4 KiB) TX bytes:2536 (2.4 KiB)
dhenson at Earth-svr:~$ cat /etc/hosts
# 127.0.0.1 localhost
192.168.1.51 Earth-svr.site Earth-svr localhost
192.168.1.52 Venus-ws.site Venus-ws
192.168.1.53 Mars-laptop.site Mars-laptop
# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts
dhenson at Earth-svr:~$
For Venus-ws
jhenson at Venus-desktop:~$ ifconfig
eth0 Link encap:Ethernet HWaddr 00:15:F2:5B:9B:10
inet addr:192.168.1.52 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::215:f2ff:fe5b:9b10/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:7903 errors:0 dropped:0 overruns:0 frame:0
TX packets:3847 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2013210 (1.9 MiB) TX bytes:332621 (324.8 KiB)
Interrupt:22 Base address:0xe800
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:2 errors:0 dropped:0 overruns:0 frame:0
TX packets:2 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:100 (100.0 b) TX bytes:100 (100.0 b)
jhenson at Venus-desktop:~$ cat /etc/hosts
127.0.0.1 localhost
192.168.1.51 Earth-svr.site Earth-svr
192.168.1.52 Venus-ws.site Venus-ws
192.168.1.53 Mars-laptop.site Mars-laptop
# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts
jhenson at Venus-desktop:~$
For Mars-laptop
dhenson at Mars-laptop:~$ ifconfig
eth0 Link encap:Ethernet HWaddr 00:19:B9:76:09:3C
inet addr:192.168.1.53 Bcast:192.168.1.255 Mask:255.255.255.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
Interrupt:21
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:46 errors:0 dropped:0 overruns:0 frame:0
TX packets:46 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:4251 (4.1 KiB) TX bytes:4251 (4.1 KiB)
wlan0 Link encap:Ethernet HWaddr 00:19:7E:62:59:16
inet addr:192.168.1.53 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::219:7eff:fe62:5916/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:3593 errors:0 dropped:0 overruns:0 frame:0
TX packets:2631 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1442713 (1.3 MiB) TX bytes:244737 (239.0 KiB)
Interrupt:19 Memory:d0200000-d0204000
dhenson at Mars-laptop:~$ cat /etc/hosts
127.0.0.1 localhost
192.168.1.51 Earth-svr.site Earth-svr
192.168.1.52 Venus-ws.site Venus-ws
192.168.1.53 Mars-laptop.site Mars-laptop.site
# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts
dhenson at Mars-laptop:~$
The original install used DHCP but I am tryng to switch to static.
My Linksys router/switch has a firewall. I use that and my machines have
their firewalls turned off.
I'm afraid that ethereal, now apparently called wireshark, is beyond my
current capabilities. I'm also having trouble getting it downloaded.
I don't have a crossover cable but I'm going to the store tomorrow. I'll
pick one up.
Thanks for offering to help.
Don Henson
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