I have a fresh install of CentOS 4.8 running on an internal development server. I haven't done anything to it besides setting up sudoers and SSH. I can SSH into the server and from there resolve domains to IPs and ping internal servers, but for some reason I don't get any response from pinging external servers.

The software firewall is disabled, and the problem is present with both static and DHCP-assigned network configurations. The network domain controller is a Windows Server 2003 box.

$ nslookup google.com
Server:         10.254.2.5
Address:        10.254.2.5#53

Non-authoritative answer:
Name:   google.com
Address: 74.125.47.147
Name:   google.com
Address: 74.125.47.99
<etc...>

10.254.2.5 is the Win2K3 server.

$ ping google.com
PING google.com (74.125.47.106) 56(84) bytes of data.

It just hangs here indefinitely.

$ cat /etc/resolv.conf
; generated by /sbin/dhclient-script
search <...snip...>.local
nameserver 10.254.2.5
nameserver 10.254.2.124

10.254.2.124 is the backup DC server, which is currently off and tombstoned by this point. The snipped section is our company name.

# ifconfig
eth0      Link encap:Ethernet  HWaddr <snip>
          inet addr:10.254.2.101  Bcast:10.254.2.255  Mask:255.255.255.0
          inet6 addr: <snip>/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:80066 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4421 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:7810133 (7.4 MiB)  TX bytes:590550 (576.7 KiB)
          Interrupt:225 Base address:0xc000

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:32 errors:0 dropped:0 overruns:0 frame:0
          TX packets:32 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:8104 (7.9 KiB)  TX bytes:8104 (7.9 KiB)

# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
10.254.2.0      0.0.0.0         255.255.255.0   U     0      0        0 eth0
169.254.0.0     0.0.0.0         255.255.0.0     U     0      0        0 eth0
0.0.0.0         10.254.2.5      0.0.0.0         UG    0      0        0 eth0

And, for good measure, a snapshot of the current ethernet config via the system-config-network GUI.

Edit: I don't yet have enough rep to post images, so here's a link. Sorry!
system-config-network snapshot

I'm pretty green when it comes to setting up *nix dev servers and network configuration in general, so please let me know if I've left out critical information, or posted information I shouldn't have posted.

Thanks!