[ubuntu-za] gateway setup problem

[Corrie Strydom]

Hi everyone, what a issue to be stuck with on a Friday afternoon.
Something changed (and I realy dont know what since last night) and
now I cant access a gateway/firewall on our work LAN.

I'm trying to access the gateway (192.168.101.128) from my laptop
(192.168.101.204)
I cant ping the IP from my laptop, but I can ping and connect from
another computer on the network, same kind of settings as below.

Here is some info :

My laptop
$ cat /etc/network/interfaces
# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet static
	address 192.168.101.204
	netmask 255.255.255.0
	network 192.168.101.0
	broadcast 192.168.101.255
	gateway 192.168.101.128

Ran route :
$ route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.101.0   *               255.255.255.0   U     0      0        0 eth0
169.254.0.0     *               255.255.0.0     U     1000   0        0 eth0
default         192.168.101.128 0.0.0.0         UG    100    0        0 eth0

Ran
$ ifconfig eth0 :
eth0      Link encap:Ethernet  HWaddr 00:22:64:4d:5d:0e
          inet addr:192.168.101.204  Bcast:192.168.101.255  Mask:255.255.255.0
          inet6 addr: fe80::222:64ff:fe4d:5d0e/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:16700 errors:0 dropped:0 overruns:0 frame:0
          TX packets:16823 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:6036343 (6.0 MB)  TX bytes:1564634 (1.5 MB)
          Interrupt:17


I can ping from the laptop other IPs on the LAN, within the same
range, but not the gateway on 192.168.101.128.

I've asked the ISP to check their rules on the gateway, if they could
be blocking my IP to their gateway (pretty soon I'll put in my own
gateway/firewall, and really cant wait), but no luck?

any other suggestions?

(ps, I've restarted the networking interface a few times, flushed the
route table a few times, and restarted the whole computer a few times)

Thanks and have a briljant weekend (G0 Sharks!)

Corrie