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Thread: unable to ping up and working computer on LAN

  1. #1

    Default unable to ping up and working computer on LAN

    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. #2

    Default Re: unable to ping up and working computer on LAN

    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. #3

    Default Re: unable to ping up and working computer on LAN

    I can however ping localhost with a positive result...

  4. #4

    Default Re: unable to ping up and working computer on LAN

    Quote Originally Posted by ed_v View Post
    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...
    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. #5

    Default Re: unable to ping up and working computer on LAN

    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...)
    Code:
    inet addr:192.168.0.??  Bcast:192.168.0.255  Mask:255.255.255.0

  6. #6
    Join Date
    Dec 2009
    Location
    Moldova
    Posts
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    Default Re: unable to ping up and working computer on LAN

    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. #7

    Default Re: unable to ping up and working computer on LAN

    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. #8
    Join Date
    Dec 2009
    Location
    Moldova
    Posts
    130

    Default Re: unable to ping up and working computer on LAN

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

  9. #9

    Default Re: unable to ping up and working computer on LAN

    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.
    Code:
    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
    Code:
    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. #10

    Default Re: unable to ping up and working computer on LAN

    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....

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