comp need to be pinged by domain for internet

March 6, 2011 at 22:41:41
Specs: Windows 7
I am trying to learn about domains so I have setup an internal domain at home. The domain is a windows 2008 server. The server is created as a primary forest, and is named file01.<dotcom I linked>.com. The primary IP on this server is 192.168.1.11 and the static ip on all other computers are 192.168.1.101 - 200.

It appears after 10-15 minutes of all computers working properly the internet stops working and I need to ping the computer (192.168.1.101) with the domain (192.168.1.11) for the internet to work. This is weird because I am certain everything is set up properly.

Current computer setup:
ip: 192.168.1.101
subnet 255.255.255.0
gateway 192.168.1.1
dns 192.168.1.11

Current server setup:
ip 192.168.1.101
subnet 255.255.255.0
gateway 192.168.1.1
dns <the 2 dns provided by my isp provider>

Router: Linksys

Does anyone have any idea what the problem might be?


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#1
March 7, 2011 at 01:46:28
Your computer IP should be different than your server IP.

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#2
March 7, 2011 at 01:58:40
"I need to ping the computer (192.168.1.101) with the domain "
so your jumping on the server and using the ping comand

have a look to see if you have a firewall on the domain server.
a ping comand shouldnt do anything.

in the interest of tessting what happens when you ping fom the pc's to the domain controller instead?

also are the ip adresses static or are you using dhcp?

all text needs typos. There there for the reader to find,to distract them from the total lack of content.
google it! wasnt the answer to the question i asked so dont be dense and give me that repl


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#3
March 7, 2011 at 04:03:18
All computers have a static ip. When you ping the domain on the computer you get a no reply response with your ip until the domain pings your computer then you get a response from the domain.

Ex
computer pinging domain:
192.168.1.101 > ping 192.168.1.11
No reply from 192.168.1.101 this shoes up 4 times
(note the no reply is from my computer when I ping the domain. I found this odd)

Computer pinging domain after domain pings computer
192.168.1.101 > ping 192.168.1.11
Reply found from ip


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Related Solutions

#4
March 7, 2011 at 05:40:17
ok try this to see if there is something else at play.

start everything up as normal and wait till the conection to the internet drops.
go to the run part of the windows 7 menu and type cmd on the pc.
when application cmd comes up right click and go to run as administrator
the dos prompt will come up.
type in "apr -a"
have a look to see if the ip address of the dns is there

if its not there ping the dns from the pc and run "apr -a"
again look to see if there is an entry for the server
and report the results.

what i think is the case is you have the dns servers conected to a switch then the hosts are on said switch. for some reason the pc is loosing the arp table entry for the server. then when you try ping it from the pc because its on the same network the pc is dropping down into the arp table finding no address. the pc is sending out an arp request and the server isnt replying due to some setting or possibly fire wall. since there is no arp value in the table it cannot contact the server.

however when you ping the other way the pc is adding the entrying into the arp table the information that it has gained from the ping that originated from the server.
so the pc can now talk to it since there is an arp entry for the server.

the reason for the odd ping message is they are on the same lan so the pc is trying to find the server through the physical adress(mac).

the other thing i can think of is have you put the server in a dmz on a home router???

all text needs typos. There there for the reader to find,to distract them from the total lack of content.
google it! wasnt the answer to the question i asked so dont be dense and give me that repl


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#5
March 7, 2011 at 13:59:27
lordmanhamer, That makes a lot of sense I will check that out once I get home I should be home in a little bit but my question is should I have DMZ enabled? if so what does DMZ do exactly? I know it oepns all the ports but why do I need all the ports open if it is just for a domain?

Thanks ahead of time and I appreciate the assistance.


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#6
March 7, 2011 at 15:42:42
lordmanhamer, that is exactly the issue. I have the domain server on the same network and my pc's are not registering it on the ARP. how do I fix this issue?

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#7
March 8, 2011 at 16:09:35
wooohooo

thats half the battle

im going to have to do a bit of digging.
but the "quick and dirty" option is adding the entry to the arp table manually on all pc's you would have to go onto each pc and go into the cmd as before and add the entry using the command

arp -s 157.55.85.212 00-aa-00-62-c6-09

replacing the ip address with the domain and the mac address of the server

but i would rather get to the root problem. i presume you are using server 2008. ill have a look into this and see if there is a better solution. i still got the notion that there is some service or firewall that is kicking in on the server and not letting the server respond to the arp request. From what i understand the pc should be loosing connection between 2 and 20 minutes because it automatically clears then updates its learned entries.

as for the dmz. the dmz is the demilitarized zone. the current way of thinking a dmz is where you should put any servers you want to be part of the network but to have a firewall or and intrusion detection set up to make sure its secure. historically its where the web servers are put and the firewall rules would be put in to make them more secure. Anything in the dmz is part of your network but has restricted access to the outside world and the rest of your network

on a home router it sends all traffic to it from the wan port unless it knows otherwise. but more importantly on some home routers it sets up rules that stop it from being able to talk freely with the rest of your lan. i would keep it out of the dmz as it will put rules in that you cant see and also it will need to be secure as hell since it will get hammered from the internet. i put my ps3 in the dmz as i was told my downloads would speed up. i saw the reverse downloads speeds dropped as it got a tonne of traffic trying to probe it for open tcp ports.

all text needs typos. There there for the reader to find,to distract them from the total lack of content.
google it! wasnt the answer to the question i asked so dont be dense and give me that repl


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#8
March 8, 2011 at 16:19:52
There is no mystery here.

Clearly DNS is not configured properly for Active Directory
Workstation should be pointing to the server for dns not the isp
Server should point to itself by ip for dns
Dns server forwarders tab should be populated by the isps dns entries.

This is clearly covered in any MS training manual dealing with setting up server.

Answers are only as good as the information you provide.
How to properly post a question:
Sorry no tech support via PM's


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#9
March 8, 2011 at 18:36:05
wanderer, Thank you for your information however if you read my original post that is EXACTLY how I set it up. this issue is out of the ordinary for me and that is why I am asking.

lordmanhamer, Yes you are correct it kicks off after 2-20 minutes for me and I just really find it weird this is a first for me I also never used DMZ as I always felt it didnt sound secure but I appreciate the clarification I now understand it a little more. This thing is just mind boggling for me as to why the arp tables do not update automatically.


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#10
March 14, 2011 at 08:20:59
only thing i can say is firewall or the nic, set up not to respond to arp requests on the server or it could be the arp service failing for some uknown reason

sorry im a bit late on the responce. im currrently jumping through 101 hurdles trying to get a job.

all text needs typos. There there for the reader to find,to distract them from the total lack of content.
google it! wasnt the answer to the question i asked so dont be dense and give me that repl


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#11
March 14, 2011 at 08:24:56
wanderer, Thank you for your information however if you read my original post that is EXACTLY how I set it up.

Wrong. That is not how you have it setup. See below:

Current computer setup:
ip: 192.168.1.101
subnet 255.255.255.0
gateway 192.168.1.1
dns 192.168.1.11

Current server setup:
ip 192.168.1.101
subnet 255.255.255.0
gateway 192.168.1.1
dns <the 2 dns provided by my isp provider>

Assuming your DC is 192.168.1.11 and not 1.101 (the same IP as your workstation)
then I suspect wanderer is correct and you have your DNS misconfigured on the DC.

Where do you have the following configured on the server:
dns <the 2 dns provided by my isp provider>

If you have that set in your TCP/IP settings for the network interface then it's no wonder it isn't working. Your DNS should be set to 127.0.0.1 or 192.168.1.11 on the server in it's TCP/IP settings for the interface as wanderer said (and I quote):

Server should point to itself by ip for dns

In the DNS service on the server you create a forward which contains the DNS address(es) of your ISP's DNS server(s).

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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