Hello, world!

Background: We've had a Moodle Appliance running happily for quite some time. Other machines (virtual and physical) sitting in the DMZ appear to be working fine. A week or two ago, we upgraded our internet bandwidth and router along with it. We have a mikrotik router, and all port forwards appear to be working properly, all NAT/Firewall rules were set up identically to the original router. The machine can ping the outside world (by name or IP), but I can't seem to interract with the internet, otherwise. 'apt-get update' gives me a timed out connection. All i'm seeing in my postfix logs are 'Connection timed out'. I appear to be unable to run a normal traceroute, as well.

I should also mention, that I can access the server from the internet without issue. The webserver is running, and responding to requests, even outside of the LAN. 

root@moodle ~# ifconfig eth1

	eth1      Link encap:Ethernet  HWaddr 00:50:56:9e:1d:c1

inet addr:10.11.1.50  Bcast:10.11.1.255  Mask:255.255.255.0
          inet6 addr: fe80::250:56ff:fe9e:1dc1/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1492  Metric:1
          RX packets:11066 errors:0 dropped:0 overruns:0 frame:0
          TX packets:15816 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1213290 (1.2 MB)  TX bytes:5193934 (5.1 MB)
          Interrupt:19 Base address:0x2000

root@moodle ~# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
10.11.1.0       *               255.255.255.0   U     0      0        0 eth1
default         10.11.1.1       0.0.0.0         UG    100    0        0 eth1

Anyone have any suggestions? If any additional information might be helpful, just let me know. I realize this may be more of an Ubuntu issue, but I thought I'd start here.

EDIT: It appears that a normal traceroute is successful. A forum post I saw recommended trying 'traceroute -I' and 'traceroute -T'. The latter, is unsuccessful, however.

Thanks!