Did my ISP screw my connection?

[Jzero]

I set up a web interface to my X10 controllers this morning. When I tried to access it at my office about an hour later it worked fine.
When I try it tonite, I come up empty-handed.
The web interface is running--I got access it from other computers on my LAN. Just not beyond my router.
When I try to ping my external IP, I get "TTL expired in transit."
What's going on? Did my ISP screw something in their routers to block access to my web interface?

If I do a tracert, it goes from comcast to sprintlink and then goes to level3.net where it goes through 3 or 4 hops and then it suddenly starts to bounce between 2 addresses until it expires.

 

[Hossenfeffer]

Any chance your router is blocking and/or not responding to the requests you're sending? Typical default in a lot of routers

 

[Jzero]

Originally posted by: Hossenfeffer
Any chance your router is blocking and/or not responding to the requests you're sending? Typical default in a lot of routers

I have it passing traffic on port 80 through to the right internal IP.
Like I said...it was working at like 10:30 this morning.
It's either something my ISP did or some router that went to hell. I'm leaning towards the latter but it's odd that it happens right when I put this up.

I haven't made any changes between this morning and tonite.