The DHCP lease implies that your address *could* change every day. There are two situations where it wouldn't: 1) you really do have a "stealth" static IP and the DHCP is just for autoconfiguration purposes. This is rather unusual; most ISPs that offer static IP do so very loudly for advertising reasons since, obviously, it's a desirable feature. However, there are some ISPs that do indeed do that silently; just don't count on it staying that way. More likely, however, 2) relatively few systems are competing for leases, so even though you have a truly dynamic IP, you just keep getting the same address in the round robin because even though it got freed, no one was waiting to grab a lease ahead of you, and thus you got the old address back again.
The router's external address *shouldn't* be 192.168.1.1 unless there's something intriguing about your network. According to the logs here, the external IP you're exposing is in the 67/24 network (that's a Class A IP 67.*.*.* owned by Comcast; full subnet censored for privacy, ask me if you want it and really can't figure out what your external address is).
What do you do about it?
1) March up to Comcast and present your checkbook and say, "Yo, fool, give me a static IP." Write them a nice additional surcharge a month.
2) Change services to a provider that provides static IP for a nominal extra fee. I use DSLExtreme which should be available to you also, since you're in California as well. Their static IP rates are *very* reasonable and it's dirt cheap to get extra addresses if you want them, and they're friendly to people who want to run servers.
http://www.dslextreme.com
3) Live with Comcast's dynamic IP restrictions and use a service like
http://www.dyndns.org to do dynamic DNS mapping, which requires your system to run a client to constantly broadcast to DynDNS what address you're using. Your firewall may or may not support this, and Comcast may or may not allow you to run services from your servers even if you *do* get this working. Check your AUP before you even bother.
"you're a doctor.... and 27 years.... so...doctor + 27 years = HATORI SOHMA" - RoyalWing, when I was 27
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