unable to ping up and working computer on LAN

English Network/Internet
#1

unreachable computer’s ifconfig reports xxx.xxx.xxx.37
but when I ping that address from another computer it says “Destination Host Unreachable” (all the other computers on the LAN can ping each other except this one particular computer)
I can ping other computers from the unreachable computer just fine…

#2

now I have tried two different network cards with the same result…
I can’t ping it and I cant remote desktop to it either…

#3

I can however ping localhost with a positive result…

#4

I must have been in error here.
I CANNOT ping from xxx.xxx.xxx.37 to any other computers with a positive result nor can I ping xxx.xxx.xxx.37 from any other computer.
I can however ping opensuse.org from all computers on the LAN.
thanks to anybody that can decipher this problem…

#5

one thing I notice is that Bcast and Mask from ifconfig is consistent on all the computers.
the only thing that changes is inet addr…
example (I use wild cards where the values change…)


inet addr:192.168.0.??  Bcast:192.168.0.255  Mask:255.255.255.0
#6

did you try to disable SuseFirewall ? if it’s working you can just open necessary services or for specific ip,network in custom rules.

#7

yes I have done custom exceptions to the firewall, demilitarized zones, and disabling the firewall without automatic start.
it is odd, I have reinstalled openSUSE to try and resolve the issue also.
all to no avail.
it is like the one computer is on its own network…
that is why I posted that output from ifconfig
I just don’t know how to resolve the issue.

#8

please post /sbin/route, /sbin/ifconfig for these desktops

#9

I have 3 linux machines.
machine 1 can ping machine 3, but cannot ping 2
machine 3 can ping machine 1, but cannot ping 2
machine 2 cannot ping either machine 1 or 3.
all machines can ping opensuse.org
this is the output from machine 1.


linux-z38f:~ # route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.0.0     *               255.255.255.0   U     2      0        0 wlan0
default         192.168.0.1     0.0.0.0         UG    0      0        0 wlan0
linux-z38f:~ # ifconfig
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:112 errors:0 dropped:0 overruns:0 frame:0
          TX packets:112 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:7464 (7.2 Kb)  TX bytes:7464 (7.2 Kb)

wlan0     Link encap:Ethernet  HWaddr 00:23:69:76:50:82  
          inet addr:192.168.0.9  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::223:69ff:fe76:5082/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:10719 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1059 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:2899760 (2.7 Mb)  TX bytes:154433 (150.8 Kb)

this is the output from machine 2 that is unreachable



dhcppc36:/home/user # route ; ifconfig
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.0.0     *               255.255.255.0   U     1      0        0 eth0
default         192.168.0.1     0.0.0.0         UG    0      0        0 eth0
eth0      Link encap:Ethernet  HWaddr 00:0D:56:FD:B7:E4
          inet addr:192.168.0.38  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::20d:56ff:fefd:b7e4/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:571 errors:0 dropped:0 overruns:0 frame:0
          TX packets:281 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:86703 (84.6 Kb)  TX bytes:22365 (21.8 Kb)

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:133 errors:0 dropped:0 overruns:0 frame:0
          TX packets:133 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:9852 (9.6 Kb)  TX bytes:9852 (9.6 Kb)
#10

I think I have discovered the issue…
I fired up a 4th machine that is running win 7 that is also hard wired to the LAN
The machines that are on wireless can see each other and the machines that are hard wired can see each other, but if any machine tries to ping a machine that is not connect the same way either wired or wireless there is no connection…

#11

the only difference that I can see is that machine 1 is connected through wifi and the second has Ethernet connection.
Maybe it is related to your router configuration?

#12

then it is for sure related to router configuration. I have at my home similar network and I have no problems like this with my tp-link wireless router so you should have a look at the router configuration, manual

#13

my dsl modem does both wireless and wired connections and I gave my real dedicated router away :frowning: thinking I wouldn’t need it any more…
its a qwest pk5000z cheapy thing

#14

this kind of modems should be able to do the same (maybe with less functionality).
Maybe it is related to router firewall settings?
try to disable it on the router and to try again.

#15

yeah, you might be right.
um, thanks for your support it was a great help in confirming my suspicion.
I will get with tech support for the modem and see what they have to say.
once again thanks for helping.