Some Computers Connect, Others Don't

WannaBeIT · 02-21-2006, 05:10 PM

I've got about 15 computers within a network that all connect to a large switch then go out to my Watchguard Firewall then out to my Comcast cable box to the internet.
I can "see" within my network all of my machines. Each one with variable "shared" files.
MOST of these machines can connect to the internet with no problem. A couple of them cannot even with the same settings.
I'm probably missing something, most likely easy.
Any ideas on what I can be overlooking?
- I've got a Static IP on my braodband cable box
- My firewall is DHCP to pick up my cable box
- My computers are all Dynamic so I can VPN (internally) to each one.
- Each one is configured with a Preferred and Alternate DNS server
- I have disabled the XP firewall to let me get in via VPN because there is a firewall through the Watchguard box.

Any help would be appreciated!!
Thanks
Mike

**cjessee** · 02-22-2006, 07:20 AM

I would make sure that the IP address range for DHCP is large enough to include all of the boxes in your network. What are you using for your "large switch"?

What OS are you running on the machines that won't connect?

WannaBeIT · 02-22-2006, 08:44 AM

I have about 100 addresses to choose from if I let them all choose their own IP address, BUT I input them manualy so I can find them easily.
We have a D-Link Gigabit Switch (24X10/100, 2X10/100/1000).
All of these machines are running XP Pro.

(Thanks for your response!)

**cjessee** · 02-22-2006, 08:57 AM

The next suspect could be the firewall... Is this a "firewall in a box"? Also, is it always the same two machines that will not connect? Or is this a random event?

WannaBeIT · 02-22-2006, 09:11 AM

The "box-o-firewall" is a Watchguard SOHO6. It has the external DHCP to find the cable box and the static internal IP for my machines to link to.
The machines are not quite random but it seems they used to work at one time and then they don't. Then I get a couple more machines that won't connect. Strange.
I would think that if it was the firewall it would effect ALL of the computers linked to it.

**cjessee** · 02-22-2006, 09:13 AM

can you post the ipconfig /all from one of the machines that is not connecting to the internet but is connecting to the rest of the network?

WannaBeIT · 02-22-2006, 09:21 AM

This is my ipconig through my cmd command prompt. Is this what you wanted?

**cjessee** · 02-22-2006, 09:44 AM

Have you tried pinging the DNS servers? Try that, then try with a Domain name and see if DNS is the problem. I would ping both DNS servers by their IP and see if that is successful.

WannaBeIT · 02-22-2006, 10:03 AM

The #15 machine that cannot see the internet "timed out" when pining DNS 1 and 2.
Another machine (this one) pings them with no problem.
I've compared the ipconfig between the two machines and there are no discrepencies.

**cjessee** · 02-22-2006, 10:05 AM

Have you tried pinging the gateway?

WannaBeIT · 02-22-2006, 10:08 AM

pinging the gateway comes back NO PROBLEM.

**cjessee** · 02-22-2006, 10:26 AM

Well... then this would leave me to blame the firewall. Just an odd question, but how does the licensing for these routers work? I see on the website that you have to purchase firewall licensing? Do you have enough licenses?

WannaBeIT · 02-22-2006, 10:37 AM

THAT was it!!

I can't believe I'm so blind.

When I logged onto the Administration screen for the firewall, it told me I had 10 licenses and all 10 were used. We have 15 computers but not all are online. The problem is when one of the computers gets online, even just once, it will hold a license until we release the license manually

You are great!
THANK YOU!

**cjessee** · 02-22-2006, 10:55 AM

Awesome. I'm glad you found the root of the problem. We just had to figure out where the problem was occurring.. Good luck.

networkspy · 02-23-2006, 08:30 AM

try to go in command prompt an type (net view) so you can watch all your connected network computer;

what OS did you using. an try to ping yahoo.com -t

**cjessee** · 02-23-2006, 08:36 AM

Dude... we fixed it already...

WANNABEIT please mark this post solved.

02-21-2006, 05:10 PM	#1 (permalink)
WannaBeIT Registered User Join Date: Feb 2006 Location: Colorado Posts: 7 OS: XP	Some Computers Connect, Others Don't I've got about 15 computers within a network that all connect to a large switch then go out to my Watchguard Firewall then out to my Comcast cable box to the internet. I can "see" within my network all of my machines. Each one with variable "shared" files. MOST of these machines can connect to the internet with no problem. A couple of them cannot even with the same settings. I'm probably missing something, most likely easy. Any ideas on what I can be overlooking? - I've got a Static IP on my braodband cable box - My firewall is DHCP to pick up my cable box - My computers are all Dynamic so I can VPN (internally) to each one. - Each one is configured with a Preferred and Alternate DNS server - I have disabled the XP firewall to let me get in via VPN because there is a firewall through the Watchguard box. Any help would be appreciated!! Thanks Mike

02-22-2006, 07:20 AM	#2 (permalink)
cjessee Uh oh. Join Date: Aug 2005 Location: Ohio Posts: 794 OS: Windows NT/2000/XP, Dictaphone, Windows 2003 Server	Dhcp I would make sure that the IP address range for DHCP is large enough to include all of the boxes in your network. What are you using for your "large switch"? What OS are you running on the machines that won't connect?

02-22-2006, 08:57 AM	#4 (permalink)
cjessee Uh oh. Join Date: Aug 2005 Location: Ohio Posts: 794 OS: Windows NT/2000/XP, Dictaphone, Windows 2003 Server	firewall The next suspect could be the firewall... Is this a "firewall in a box"? Also, is it always the same two machines that will not connect? Or is this a random event?

02-22-2006, 09:11 AM	#5 (permalink)
WannaBeIT Registered User Join Date: Feb 2006 Location: Colorado Posts: 7 OS: XP	The "box-o-firewall" is a Watchguard SOHO6. It has the external DHCP to find the cable box and the static internal IP for my machines to link to. The machines are not quite random but it seems they used to work at one time and then they don't. Then I get a couple more machines that won't connect. Strange. I would think that if it was the firewall it would effect ALL of the computers linked to it. Last edited by WannaBeIT; 02-22-2006 at 09:13 AM.

02-22-2006, 09:13 AM	#6 (permalink)
cjessee Uh oh. Join Date: Aug 2005 Location: Ohio Posts: 794 OS: Windows NT/2000/XP, Dictaphone, Windows 2003 Server	ipconfig can you post the ipconfig /all from one of the machines that is not connecting to the internet but is connecting to the rest of the network?

02-22-2006, 08:44 AM	#3 (permalink)
WannaBeIT Registered User Join Date: Feb 2006 Location: Colorado Posts: 7 OS: XP	I have about 100 addresses to choose from if I let them all choose their own IP address, BUT I input them manualy so I can find them easily. We have a D-Link Gigabit Switch (24X10/100, 2X10/100/1000). All of these machines are running XP Pro. (Thanks for your response!)

02-22-2006, 09:44 AM	#8 (permalink)
cjessee Uh oh. Join Date: Aug 2005 Location: Ohio Posts: 794 OS: Windows NT/2000/XP, Dictaphone, Windows 2003 Server	Pinging Have you tried pinging the DNS servers? Try that, then try with a Domain name and see if DNS is the problem. I would ping both DNS servers by their IP and see if that is successful.

02-22-2006, 10:03 AM	#9 (permalink)
WannaBeIT Registered User Join Date: Feb 2006 Location: Colorado Posts: 7 OS: XP	The #15 machine that cannot see the internet "timed out" when pining DNS 1 and 2. Another machine (this one) pings them with no problem. I've compared the ipconfig between the two machines and there are no discrepencies.

02-22-2006, 10:05 AM	#10 (permalink)
cjessee Uh oh. Join Date: Aug 2005 Location: Ohio Posts: 794 OS: Windows NT/2000/XP, Dictaphone, Windows 2003 Server	gateway Have you tried pinging the gateway?

02-22-2006, 10:08 AM	#11 (permalink)
WannaBeIT Registered User Join Date: Feb 2006 Location: Colorado Posts: 7 OS: XP	pinging the gateway comes back NO PROBLEM.

02-22-2006, 10:26 AM	#12 (permalink)
cjessee Uh oh. Join Date: Aug 2005 Location: Ohio Posts: 794 OS: Windows NT/2000/XP, Dictaphone, Windows 2003 Server	License Well... then this would leave me to blame the firewall. Just an odd question, but how does the licensing for these routers work? I see on the website that you have to purchase firewall licensing? Do you have enough licenses?

02-22-2006, 10:37 AM	#13 (permalink)
WannaBeIT Registered User Join Date: Feb 2006 Location: Colorado Posts: 7 OS: XP	THAT was it!! I can't believe I'm so blind. When I logged onto the Administration screen for the firewall, it told me I had 10 licenses and all 10 were used. We have 15 computers but not all are online. The problem is when one of the computers gets online, even just once, it will hold a license until we release the license manually You are great! THANK YOU!

02-22-2006, 10:55 AM	#14 (permalink)
cjessee Uh oh. Join Date: Aug 2005 Location: Ohio Posts: 794 OS: Windows NT/2000/XP, Dictaphone, Windows 2003 Server	Awesome Awesome. I'm glad you found the root of the problem. We just had to figure out where the problem was occurring.. Good luck.

02-23-2006, 08:30 AM	#15 (permalink)
networkspy Registered User Join Date: Feb 2006 Location: Philippines Posts: 27 OS: Windows 2000 Professional	try to go in command prompt an type (net view) so you can watch all your connected network computer; what OS did you using. an try to ping yahoo.com -t

02-23-2006, 08:36 AM	#16 (permalink)
cjessee Uh oh. Join Date: Aug 2005 Location: Ohio Posts: 794 OS: Windows NT/2000/XP, Dictaphone, Windows 2003 Server	It's fixed Dude... we fixed it already... WANNABEIT please mark this post solved.