On the multihomed server ,
Using ipconfig/all , I got
Windows NT IP Configuration
Host Name . . . . . . . . . : host
DNS Servers . . . . . . . . :
Node Type . . . . . . . . . : Broadcast
NetBIOS Scope ID. . . . . . :
IP Routing Enabled. . . . . : Yes
WINS Proxy Enabled. . . . . : No
NetBIOS Resolution Uses DNS : No
Ethernet adapter dlkfet2:
Description . . . . . . . . : Fast Ethernet PCI Adapter
Physical Address. . . . . . : 00-05-5D-0F-F7-C8
DHCP Enabled. . . . . . . . : No
IP Address. . . . . . . . . : 192.168.20.1
Subnet Mask . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . :
Ethernet adapter El90x1:
Description . . . . . . . . : 3Com 3C90x Ethernet Adapter
Physical Address. . . . . . : 00-B0-D0-3C-A1-CE
DHCP Enabled. . . . . . . . : No
IP Address. . . . . . . . . : 172.25.224.76
Subnet Mask . . . . . . . . : 255.255.255.128
Default Gateway . . . . . . : 172.25.224.1
And routing table by "route pring " command
Interface List
0x1 ........................... MS TCP Loopback interface
0x2 ...00 05 5d 0f f7 c8 ...... Fast Ethernet PCI Adapter
0x3 ...00 b0 d0 3c a1 ce ...... 3Com 3C90x Ethernet Adapter
===========================================================================^M
===========================================================================^M
Active Routes:
Network Destination Netmask Gateway Interface Metric^M
0.0.0.0 0.0.0.0 172.25.224.1 172.25.224.76 1
127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1
172.25.224.0 255.255.255.128 172.25.224.76 172.25.224.76 1
172.25.224.76 255.255.255.255 127.0.0.1 127.0.0.1 1
172.25.255.255 255.255.255.255 172.25.224.76 172.25.224.76 1
192.168.20.0 255.255.255.0 192.168.20.1 192.168.20.1 1
192.168.20.1 255.255.255.255 127.0.0.1 127.0.0.1 1
192.168.20.255 255.255.255.255 192.168.20.1 192.168.20.1 1
My win2k clients routing and tcp/ip configuration informatin is ,
Host Name . . . . . . . . . . . . : support
Primary DNS Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Broadcast
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
Ethernet adapter ±¾µØÁ¬½Ó:
Connection-specific DNS Suffix . : domain.com
Description . . . . . . . . . . . : 3Com Megahertz (BI) 10-100 LAN + 56K Modem (Ethernet)
Physical Address. . . . . . . . . : 00-00-86-3E-5A-BF
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 192.168.20.3
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.20.1
DNS Servers . . . . . . . . . . . :
Routing information
===========================================================================^M
Interface List
0x1 ........................... MS TCP Loopback interface
0x2 ...00 00 86 3e 5a bf ...... 3Com Megahertz 10/100 Ethernet + 56K PC Card
===========================================================================^M
===========================================================================^M
Active Routes:
Network Destination Netmask Gateway Interface Metric
0.0.0.0 0.0.0.0 192.168.20.1 192.168.20.3 1
127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1
192.168.20.0 255.255.255.0 192.168.20.3 192.168.20.3 1
192.168.20.3 255.255.255.255 127.0.0.1 127.0.0.1 1
192.168.20.255 255.255.255.255 192.168.20.3 192.168.20.3 1
224.0.0.0 224.0.0.0 192.168.20.3 192.168.20.3 1
255.255.255.255 255.255.255.255 192.168.20.3 192.168.20.3 1
Default Gateway: 192.168.20.1
===========================================================================
Is it enough for you ?
Regards,
Michael
[EMAIL PROTECTED] wrote:
3C189C25.27854.54319AA@localhost">On 13 Dec 2001, at 18:06, Michael Zhao wrote:Hi ,
My former network structuer is as following :
outside
|
fw
|
Cisco switches
|
|
|
WSs SRVs
I want add another net segments to my net. I insert two NIC interfaces
on my windows nt server 4.0 system ( sp 6a). One NIC connect to switches
via the normal cable , and another one connect to a HUB where connected
by some clients. I am sure I did the correct multihomed configuration .
I test the routing using ping . I can ping the new clients from the old
internal machines but can not do it vice versa. But I can ping both
sides between fw and new clients .
What can I do ? Could anybody give help ?
Thanks
Michael
You probably haven't given us enough information[*].
However....I test the routing using ping. I can ping the new clients from the
old internal machines but can not do it vice versa.
Ping and successful response requires correct packet flow in both
directions. So if A can ping B, there cannot be a routing or cabling
problem preventing B from pinging A.
The only times that I have seen thie kind of asymmetric pingability
that you report is when some sort of filtering/firewalling has
intervened, typically preventing certain ICMP packet types from
flowing in a specific direction.
On many hubs, there is an "uplink" port which is actually just a
cross-over wired alternate connector for the adjacent regular port.
Strange things can happen if you have machines plugged into both
connectors. (In your case, you should not have anything plugged into
the uplink port, which is for cascading multiple hubs....)
[*]I am sure I did the correct multihomed configuration.Not to pick on you personally, but I see an *awful* lot of
questions from people whose networks aren't working, who will make a
point of saying that they are *sure* the configuration is correct
(even though it isn't working...) but don't supply the configuration
so that those whom they hope will help can *verify* that it is/looks
correct.
David Gillett
_______________________________________________ Firewalls mailing list [EMAIL PROTECTED] http://lists.gnac.net/mailman/listinfo/firewalls
