Help!!Simple Network - Bizarre Problem

  • Thread starter Thread starter tony
  • Start date Start date
T

tony

Hello,
I'm using Windows 2000 Advanced Server (Domain
controller) as a router and running NAT on Routing and
Remote Access for the following simple configuration

Internet ----> Windows 2000 server (Router with RRAS. Has
2 network cards - one public and one private) ----->
Network Switch 10/100------> Intranet Clients

Network Translation was done initially by internet
connection sharing, but now that is disabled and I'm using
NAT on Routing and Remote Access.

Problem:
I'm facing a http hiccup (timeout) problem on all the
intranet clients. Everything works fine on the server
itself. But the intranet clients often timeout randomly
on every website. Following is the configuration of the
server and a typical client. I'm very suspecious about
the routing table on the client (Please look , its Wierd!
It takes about 20 hops to get to the server!!!!!!) All of
them are automatically configured. No manual routing
whatsoever. Everything was working fine, until all hell
broke loose on intranet http few weeks ago,and I still
can't figure it out.

Please let me know if the client routing table has a
problem and how to correct it. I don't want to any manual
update to each and every intranet client. This thing
should work by default.


Server/Client info:

Server (IPCONFIG) info:

Domain Name: mydomain
full dns for domain: mydomain.mine.com


Windows 2000 IP Configuration
Host Name . . . . . . . . . . . . : mywinserv
Primary DNS Suffix . . . . . . . : mydomain.mine.com
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : Yes
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : mydomain.mine.com


Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : 3Com EtherLink XL
10/100 PCI TX NIC (3C905B-TX)
Physical Address. . . . . . . . . : 00-51-05-02-56-B1
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 62.196.233.56
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 62.196.233.251
DNS Servers . . . . . . . . . . . : 62.200.111.48
62.200.117.50

Ethernet adapter Local Area Connection 3:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : 3Com EtherLink XL
10/100 PCI For Complete PC Management NIC (3C905C-TX)
Physical Address. . . . . . . . . : 00-01-02-2C-03-E4
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 192.168.0.1
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . :
DNS Servers . . . . . . . . . . . : 62.200.111.48
62.200.117.50

Server routing table:
===========================================================
================
Interface List
0x1 ........................... MS TCP Loopback interface
0x2 ...00 50 04 03 5e bc ...... 3Com EtherLink PCI
(Microsoft's Packet Scheduler)
0x3 ...00 01 03 2b 00 e6 ...... 3Com EtherLink PCI
(Microsoft's Packet Scheduler)
===========================================================
================
===========================================================
================
Active Routes:
Network Destination Netmask Gateway
Interface Metric
0.0.0.0 0.0.0.0 62.196.233.251
62.196.233.56 1
62.196.233.56 255.255.255.0 62.196.233.56
62.196.233.56 1
62.196.233.56 255.255.255.255 127.0.0.1
127.0.0.1 1
63.255.255.255 255.255.255.255 62.196.233.56
62.196.233.56 1
127.0.0.0 255.0.0.0 127.0.0.1
127.0.0.1 1
192.168.0.0 255.255.255.0 192.168.0.1
192.168.0.1 1
192.168.0.1 255.255.255.255 127.0.0.1
127.0.0.1 1
192.168.0.255 255.255.255.255 192.168.0.1
192.168.0.1 1
224.0.0.0 224.0.0.0 62.196.233.56
62.196.233.56 1
224.0.0.0 224.0.0.0 192.168.0.1
192.168.0.1 1
255.255.255.255 255.255.255.255 62.196.233.56
62.196.233.56 1
Default Gateway: 62.196.233.251
===========================================================
================
Persistent Routes:
None



Intranet Client IP. INfo:
--------------------------------------------------

Windows IP Configuration
Host Name . . . . . . . . . . . . : MYXP
Primary Dns Suffix . . . . . . . : mydomain.mine.com
Node Type . . . . . . . . . . . . : Mixed
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : mydomain.mine.com


Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . : mydomain.mine.com
Description . . . . . . . . . . . : Intel(R) PRO/100 VE
Network Connection
Physical Address. . . . . . . . . : 00-00-E1-36-92-
A1
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.0.3
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.0.1
DHCP Server . . . . . . . . . . . : 192.168.0.1
DNS Servers . . . . . . . . . . . : 192.168.0.1
Lease Obtained. . . . . . . . . . : Sunday, October 05,
2003 5:46:51 PM
Lease Expires . . . . . . . . . . : Monday, October 13,
2003 5:46:51 PM


Intranet client routing table:

===========================================================
================
Interface List
0x1 ........................... MS TCP Loopback interface
0x10003 ...00 00 e2 33 93 a1 ...... Intel(R) PRO/100 VE
Network Connection
===========================================================
================
===========================================================
================
Active Routes:
Network Destination Netmask Gateway
Interface Metric
0.0.0.0 0.0.0.0 192.168.0.1
192.168.0.3 20
127.0.0.0 255.0.0.0 127.0.0.1
127.0.0.1 1
192.168.0.0 255.255.255.0 192.168.0.3
192.168.0.3 20
192.168.0.3 255.255.255.255 127.0.0.1
127.0.0.1 20
192.168.0.255 255.255.255.255 192.168.0.3
192.168.0.3 20
224.0.0.0 240.0.0.0 192.168.0.3
192.168.0.3 20
255.255.255.255 255.255.255.255 192.168.0.3
192.168.0.3 1
Default Gateway: 192.168.0.1
===========================================================
================
Persistent Routes:
None







..
 
In
tony said:
Hello,
I'm using Windows 2000 Advanced Server (Domain
controller) as a router and running NAT on Routing and
Remote Access for the following simple configuration

Internet ----> Windows 2000 server (Router with RRAS. Has
2 network cards - one public and one private) ----->
Network Switch 10/100------> Intranet Clients

Network Translation was done initially by internet
connection sharing, but now that is disabled and I'm using
NAT on Routing and Remote Access.

Problem:
I'm facing a http hiccup (timeout) problem on all the
intranet clients. Everything works fine on the server
itself. But the intranet clients often timeout randomly
on every website. Following is the configuration of the
server and a typical client. I'm very suspecious about
the routing table on the client (Please look , its Wierd!
It takes about 20 hops to get to the server!!!!!!) All of
them are automatically configured. No manual routing
whatsoever. Everything was working fine, until all hell
broke loose on intranet http few weeks ago,and I still
can't figure it out.

Please let me know if the client routing table has a
problem and how to correct it. I don't want to any manual
update to each and every intranet client. This thing
should work by default.


Server/Client info:

Server (IPCONFIG) info:

Domain Name: mydomain
full dns for domain: mydomain.mine.com


Windows 2000 IP Configuration
Host Name . . . . . . . . . . . . : mywinserv
Primary DNS Suffix . . . . . . . : mydomain.mine.com
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : Yes
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : mydomain.mine.com


Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : 3Com EtherLink XL
10/100 PCI TX NIC (3C905B-TX)
Physical Address. . . . . . . . . : 00-51-05-02-56-B1
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 62.196.233.56
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 62.196.233.251
DNS Servers . . . . . . . . . . . : 62.200.111.48
62.200.117.50

Ethernet adapter Local Area Connection 3:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : 3Com EtherLink XL
10/100 PCI For Complete PC Management NIC (3C905C-TX)
Physical Address. . . . . . . . . : 00-01-02-2C-03-E4
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 192.168.0.1
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . :
DNS Servers . . . . . . . . . . . : 62.200.111.48
62.200.117.50

Server routing table:
===========================================================
================
Interface List
0x1 ........................... MS TCP Loopback interface
0x2 ...00 50 04 03 5e bc ...... 3Com EtherLink PCI
(Microsoft's Packet Scheduler)
0x3 ...00 01 03 2b 00 e6 ...... 3Com EtherLink PCI
(Microsoft's Packet Scheduler)
===========================================================
================
===========================================================
================
Active Routes:
Network Destination Netmask Gateway
Interface Metric
0.0.0.0 0.0.0.0 62.196.233.251
62.196.233.56 1
62.196.233.56 255.255.255.0 62.196.233.56
62.196.233.56 1
62.196.233.56 255.255.255.255 127.0.0.1
127.0.0.1 1
63.255.255.255 255.255.255.255 62.196.233.56
62.196.233.56 1
127.0.0.0 255.0.0.0 127.0.0.1
127.0.0.1 1
192.168.0.0 255.255.255.0 192.168.0.1
192.168.0.1 1
192.168.0.1 255.255.255.255 127.0.0.1
127.0.0.1 1
192.168.0.255 255.255.255.255 192.168.0.1
192.168.0.1 1
224.0.0.0 224.0.0.0 62.196.233.56
62.196.233.56 1
224.0.0.0 224.0.0.0 192.168.0.1
192.168.0.1 1
255.255.255.255 255.255.255.255 62.196.233.56
62.196.233.56 1
Default Gateway: 62.196.233.251
===========================================================
================
Persistent Routes:
None



Intranet Client IP. INfo:
--------------------------------------------------

Windows IP Configuration
Host Name . . . . . . . . . . . . : MYXP
Primary Dns Suffix . . . . . . . : mydomain.mine.com
Node Type . . . . . . . . . . . . : Mixed
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : mydomain.mine.com


Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . : mydomain.mine.com
Description . . . . . . . . . . . : Intel(R) PRO/100 VE
Network Connection
Physical Address. . . . . . . . . : 00-00-E1-36-92-
A1
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.0.3
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.0.1
DHCP Server . . . . . . . . . . . : 192.168.0.1
DNS Servers . . . . . . . . . . . : 192.168.0.1
Lease Obtained. . . . . . . . . . : Sunday, October 05,
2003 5:46:51 PM
Lease Expires . . . . . . . . . . : Monday, October 13,
2003 5:46:51 PM


Intranet client routing table:

===========================================================
================
Interface List
0x1 ........................... MS TCP Loopback interface
0x10003 ...00 00 e2 33 93 a1 ...... Intel(R) PRO/100 VE
Network Connection
===========================================================
================
===========================================================
================
Active Routes:
Network Destination Netmask Gateway
Interface Metric
0.0.0.0 0.0.0.0 192.168.0.1
192.168.0.3 20
127.0.0.0 255.0.0.0 127.0.0.1
127.0.0.1 1
192.168.0.0 255.255.255.0 192.168.0.3
192.168.0.3 20
192.168.0.3 255.255.255.255 127.0.0.1
127.0.0.1 20
192.168.0.255 255.255.255.255 192.168.0.3
192.168.0.3 20
224.0.0.0 240.0.0.0 192.168.0.3
192.168.0.3 20
255.255.255.255 255.255.255.255 192.168.0.3
192.168.0.3 1
Default Gateway: 192.168.0.1
===========================================================
================
Persistent Routes:
None
Click to expand...

To start with Domain Controllers must point to the internal DNS and no
other. You have yours pointing to your ISP on both NICs, you are probably
having lots of other errors you are not mentioning.

For internet access configure your DNS server as per step 3 of this KB
Article: 300202 - HOW TO Configure DNS for Internet Access in Windows 2000
http://support.microsoft.com/default.aspx?scid=kb;en-us;300202&FR=1

If you have a web site hosted locally behind NAT, you need a Forward Lookup
Zone for each domain hosted locally with host records giving the private
address the web site is on.
 
Thanks. I changed the Server's DNS entry to point to the
servers ip address itself. And enabled DNS forwarding in
the DNS server for the ISP dns addresses. But still
having the same http hiccup problem on the intranet
clients. I will try the instructions in the url you gave
me.
 
Back
Top