Cannot ping DHCP server.

[Mark Alexander Bertenshaw]

Hi -

I have recently purchased a Netgear DG834G Wireless ADSL Modem/Router
(192.168.0.1), and have connected my two machines to it. One machine
(BABYLON5) has Win2000 server, and my "normal" machine (AGAMEMNON) has
Win2000 Professional. Unfortunately, the Win2000 Professional machine
cannot ping or HTTP to the router or the server machine.

I have set AGAMEMNON (which also has a number of dial-up connections, but
not active when I tested this) so that it automatically gets an IP address
and DNS allocated. And this *appears* to happen - I always get
192.168.0.4 - and looking at IPCONFIG /ALL, it appears that a DCHP server at
192.168.0.1 has leased it an IP address, and the subnet is correct
(255.255.255.0). Looking at the router setup, it appears that it detects
two devices attached to it: the Server machine (as BABYLON5) at 192.168.0.2,
and what must be AGAMEMNON (as UNKNOWN) at 192.168.0.4.

And it seems that at some level, AGAMEMNON knows about both the router and
BABYLON5 - resolving the IP addresses with ARP -a seems gives the correct
ethernet addresses. It's just that I can't contact them with ping or HTTP.

 

[Roland Hall]

in message
: I have recently purchased a Netgear DG834G Wireless ADSL Modem/Router
: (192.168.0.1), and have connected my two machines to it. One machine
: (BABYLON5) has Win2000 server, and my "normal" machine (AGAMEMNON) has
: Win2000 Professional. Unfortunately, the Win2000 Professional machine
: cannot ping or HTTP to the router or the server machine.
:
: I have set AGAMEMNON (which also has a number of dial-up connections, but
: not active when I tested this) so that it automatically gets an IP address
: and DNS allocated. And this *appears* to happen - I always get
: 192.168.0.4 - and looking at IPCONFIG /ALL, it appears that a DCHP server
at
: 192.168.0.1 has leased it an IP address, and the subnet is correct
: (255.255.255.0). Looking at the router setup, it appears that it detects
: two devices attached to it: the Server machine (as BABYLON5) at
192.168.0.2,
: and what must be AGAMEMNON (as UNKNOWN) at 192.168.0.4.
:
: And it seems that at some level, AGAMEMNON knows about both the router and
: BABYLON5 - resolving the IP addresses with ARP -a seems gives the correct
: ethernet addresses. It's just that I can't contact them with ping or
HTTP.

Tell me about your personal firewall...

--
Roland Hall
/* This information is distributed in the hope that it will be useful, but
without any warranty; without even the implied warranty of merchantability
or fitness for a particular purpose. */
Online Support for IT Professionals -
http://support.microsoft.com/servicedesks/technet/default.asp?fr=0&sd=tech
How-to: Windows 2000 DNS:
http://support.microsoft.com/default.aspx?scid=kb;EN-US;308201
FAQ W2K/2K3 DNS:
http://support.microsoft.com/default.aspx?scid=kb;EN-US;291382

 

[Mark Alexander Bertenshaw]

in message
: I have recently purchased a Netgear DG834G Wireless ADSL Modem/Router
: (192.168.0.1), and have connected my two machines to it. One machine
: (BABYLON5) has Win2000 server, and my "normal" machine (AGAMEMNON) has
: Win2000 Professional. Unfortunately, the Win2000 Professional machine
: cannot ping or HTTP to the router or the server machine.
:
: I have set AGAMEMNON (which also has a number of dial-up connections, but
: not active when I tested this) so that it automatically gets an IP address
: and DNS allocated. And this *appears* to happen - I always get
: 192.168.0.4 - and looking at IPCONFIG /ALL, it appears that a DCHP server
at
: 192.168.0.1 has leased it an IP address, and the subnet is correct
: (255.255.255.0). Looking at the router setup, it appears that it detects
: two devices attached to it: the Server machine (as BABYLON5) at
192.168.0.2,
: and what must be AGAMEMNON (as UNKNOWN) at 192.168.0.4.
:
: And it seems that at some level, AGAMEMNON knows about both the router and
: BABYLON5 - resolving the IP addresses with ARP -a seems gives the correct
: ethernet addresses. It's just that I can't contact them with ping or
HTTP.

Tell me about your personal firewall...

Roland -

I have been using ZoneAlarm, but disabling it in this case made no
difference.

However, after running netmon, it seemed that the occasional broadcast
packets got through, and I seemed to be able to recover the MAC addresses of
various IP addresses using arp -a <IP adress> . I tried replacing the
network card when the MAC address looked corrupted (which was probably a bug
in netmon). However, what *did* work was to remove the "Deterministic
Network Enhancer" component from the LAN connection properties. Googling
"Deterministic Network Enhancer" seemed to indicate a widespread problem
with this software. I realise now that this must have been installed when I
put some Netscreen VPN client software on my machine. I would guess that
this means that I won't be able to use the VPN software over my Netgear
router! Whilst this is not massively essential,.I would still like to be
able to use VPN over the ADSL connection.

Any ideas?

 

[Roland Hall]

in message
:
: : > "Mark Alexander Bertenshaw" wrote in message
: > : > : I have recently purchased a Netgear DG834G Wireless ADSL Modem/Router
: > : (192.168.0.1), and have connected my two machines to it. One machine
: > : (BABYLON5) has Win2000 server, and my "normal" machine (AGAMEMNON) has
: > : Win2000 Professional. Unfortunately, the Win2000 Professional machine
: > : cannot ping or HTTP to the router or the server machine.
: > :
: > : I have set AGAMEMNON (which also has a number of dial-up connections,
: but
: > : not active when I tested this) so that it automatically gets an IP
: address
: > : and DNS allocated. And this *appears* to happen - I always get
: > : 192.168.0.4 - and looking at IPCONFIG /ALL, it appears that a DCHP
: server
: > at
: > : 192.168.0.1 has leased it an IP address, and the subnet is correct
: > : (255.255.255.0). Looking at the router setup, it appears that it
: detects
: > : two devices attached to it: the Server machine (as BABYLON5) at
: > 192.168.0.2,
: > : and what must be AGAMEMNON (as UNKNOWN) at 192.168.0.4.
: > :
: > : And it seems that at some level, AGAMEMNON knows about both the router
: and
: > : BABYLON5 - resolving the IP addresses with ARP -a seems gives the
: correct
: > : ethernet addresses. It's just that I can't contact them with ping or
: > HTTP.
: >
: > Tell me about your personal firewall...
: > --
: > Roland Hall
:
: Roland -
:
: I have been using ZoneAlarm, but disabling it in this case made no
: difference.
:
: However, after running netmon, it seemed that the occasional broadcast
: packets got through, and I seemed to be able to recover the MAC addresses
of
: various IP addresses using arp -a <IP adress> . I tried replacing the
: network card when the MAC address looked corrupted (which was probably a
bug
: in netmon). However, what *did* work was to remove the "Deterministic
: Network Enhancer" component from the LAN connection properties. Googling
: "Deterministic Network Enhancer" seemed to indicate a widespread problem
: with this software. I realise now that this must have been installed when
I
: put some Netscreen VPN client software on my machine. I would guess that
: this means that I won't be able to use the VPN software over my Netgear
: router! Whilst this is not massively essential,.I would still like to be
: able to use VPN over the ADSL connection.

The VPN client is to connect to a VPN server. Your router/firewall just has
to support passing the port/service. If you're making a tunnel from
router/router, then that's a different story but here it is from your
client. Depending on what you're connecting to, this software may not even
be needed.

http://www.microsoft.com/serviceproviders/whitepapers/config_remote_access_VPN_win2k.asp

--
Roland Hall
/* This information is distributed in the hope that it will be useful, but
without any warranty; without even the implied warranty of merchantability
or fitness for a particular purpose. */
Online Support for IT Professionals -
http://support.microsoft.com/servicedesks/technet/default.asp?fr=0&sd=tech
How-to: Windows 2000 DNS:
http://support.microsoft.com/default.aspx?scid=kb;EN-US;308201
FAQ W2K/2K3 DNS:
http://support.microsoft.com/default.aspx?scid=kb;EN-US;291382