tjwo94
asked on
DNS problems maybe???
My domain controller today is not working right. it is booted and all the services appear to be running but noone can connect to it on the network. the server fails NSLookup to itself and cant ping out. it says ping failed. general failure. i can ping out to google. i just found out that the workstations also cannot ping themselves
the server is Server 2011 SBS and all the workstations are windows 7
the server is Server 2011 SBS and all the workstations are windows 7
atlas_shuddered
general failure is normally an indicator of a NIC problem. Failure, shutdown or disconnect.
For test only disable firewall and check again.
Make sure DNS service is working on server
Make sure DNS service is working on server
run an ipconfig /all and confirm you have IP address(es)/gateways where expected.
ASKER
so at the moment im on a workstation. it is static and has the right settings. i have set it to auto and tried to ping with auto settings and then static again. still cant ping itself or others on the network. i put in a new switch and that also didnt help. firewall is off. dns is running on the server. i think i might need to check a few things in dns though. is there anything i can do in dns to check its health
Is it the workstation on the server that is you saw the ping errors on?
*or
ASKER
all the workstations and servers cant ping themselves or eachother as far as i know. i have been to a few machines all with the same error
check if any antivirus software is installed on workstations and server and if you have disabled ping through central console rule
ex: mcafee or symantec
ex: mcafee or symantec
ASKER
i changed the ip in a workstation to an ip not in our network and the ping works fine. its like theres a really bad loopback or something breaking all network traffic
can you run the ipconfig of a machine that doesn't work and the one that is and show the results?
Make sure you don't have any other routing device (router, VPN) connected with same subnet in your network.
SOLUTION
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When you say they can't ping each other, are you pinging by dns name or by IP?
I've never heard that mylwarebytes is blocking network traffic.
It must be something different, because like you've said if you'll change IP then Ping is working.
For me it looks like route issue, are you sure no other router or VPN connection with same settings you're using is not working somewhere in your network ?
It must be something different, because like you've said if you'll change IP then Ping is working.
For me it looks like route issue, are you sure no other router or VPN connection with same settings you're using is not working somewhere in your network ?
Which edition of Malwarebytes did you have installed on the server? There was one that I have seen that corrupt communications quite a few times, but there was never a pattern, other than it always being on servers.
If that doesn't work...
When you ran nslookup, what type of result were you getting? I've seen times where the results were IPv6 centric, being the root cause of the problem. I've had to unbind IPv6 from the NIC of the server in some instances to get things operating normally again (notice I did *not* say to uninstall or actually disable IPv6).
If that doesn't work...
When you ran nslookup, what type of result were you getting? I've seen times where the results were IPv6 centric, being the root cause of the problem. I've had to unbind IPv6 from the NIC of the server in some instances to get things operating normally again (notice I did *not* say to uninstall or actually disable IPv6).
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Author solved on their own.