Can surf the net but cant ping other boxes local subnet

[sandersonsite]

Not sure exactly what information to post here but I have found this same issue on several different PCs....

I can surf the internet no problems on all PCs.

Scenario 1.
PC1 is my work PC hooked into the LAN here. The Windows XP boxes can ping each other no problems. My windows XP box cannot ping my SUSE box and my SUSE box cant ping my XP box.

PCs access internet via a proxy server located at another site.

Scenario 2.
PC2 is at home. PCs access internet via a wireless router (My SUSE box is connected to it via a cable but all other PCs are wireless) which in turn plugs into an ADSL modem.

Again - all the other PCs can ping each other but not the SUSE box (doesn't matter if they connect via a cable or wireless - same result.

----------------------------------------------------------
In both locations if I install Ubuntu or Fedora (remove SUSE and do a clean install) the machine works fine. Got net, can ping etc etc.

I have just done a clean install of OpenSUSE 11.1
I removed the tick from "auto configure" during the setup and configured my network settings when prompted.


Last time I turned off ipv6 and suddenly I can ping local subnet but cannot access the internet.

I havent tried that this time as I would rather have net access than local access for now (however I need both)

Any suggestions?

Cheers
Jay

[ab@novell.com]

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First can you access the boxes in ways besides pinging? Ping packets use
ICMP which is not used for most other traffic including HTTP, FTP, SMB,
SSH, NFS, etc. If you can mount a windows share on a Linux box but cannot
ping that would imply that ICMP is not working (or is blocked) while TCP
is not.

Get the IP/subnet/gateway and DNS information from each box noting whic
hones work and which ones do not. Also perhaps try this after shutting
down the OpenSUSE system's firewall. By default ICMP ping packets are
allowed through the firewall for both sending and receiving but maybe
yours is configured differently:

sudo /sbin/rcSuSEfirewall2 stop #shutdown the firewall for a test

Good luck.





sandersonsite wrote:
> Not sure exactly what information to post here but I have found this
> same issue on several different PCs....
>
> I can surf the internet no problems on all PCs.
>
> SCENARIO 1.[/B]
> PC1 IS MY WORK PC HOOKED INTO THE LAN HERE. THE WINDOWS XP BOXES CAN
> PING EACH OTHER NO PROBLEMS. MY WINDOWS XP BOX CANNOT PING MY SUSE BOX
> AND MY SUSE BOX CANT PING MY XP BOX.
>
> PCS ACCESS INTERNET VIA A PROXY SERVER LOCATED AT ANOTHER SITE.
>
> [B]SCENARIO 2.
> PC2 is at home. PCs access internet via a wireless router (My SUSE box
> is connected to it via a cable but all other PCs are wireless) which in
> turn plugs into an ADSL modem.
>
> Again - all the other PCs can ping each other but not the SUSE box
> (doesn't matter if they connect via a cable or wireless - same result.
>
> ----------------------------------------------------------
> In both locations if I install Ubuntu or Fedora (remove SUSE and do a
> clean install) the machine works fine. Got net, can ping etc etc.
>
> I have just done a clean install of OpenSUSE 11.1
> I removed the tick from "auto configure" during the setup and
> configured my network settings when prompted.
>
>
> Last time I turned off ipv6 and suddenly I can ping local subnet but
> cannot access the internet.
>
> I havent tried that this time as I would rather have net access than
> local access for now (however I need both)
>
> Any suggestions?
>
> Cheers
> Jay
>
>
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[sandersonsite]

Originally Posted by ab@novell.com

First can you access the boxes in ways besides pinging?

I am unable to remote control the SUSE box but I can see my samba shares - even though I cant access them as I havent setup the security yet.

Originally Posted by ab@novell.com

Get the IP/subnet/gateway and DNS information from each box noting which ones work and which ones do not.

There are over 60 PCs on this floor - would take me far too long.
For the 2 on my desk though it all seems to match.

DNS servers are the same for both boxes
Ip address range is the same also
As is the default gateway.

Originally Posted by ab@novell.com

Also perhaps try this after shutting
down the OpenSUSE system's firewall. By default ICMP ping packets are
allowed through the firewall for both sending and receiving but maybe yours is configured differently:

I have had this turned off right from the start. After the issues I have before I re-installed I thought I better eliminate as many possible causes as I could.

Originally Posted by ab@novell.com

Good luck.

So now I can see my SMB shares but still cannot remote control the PC.....

Well - at least I am making progress!!

Thanks for your help.

Jay