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Watchguard setup with Comcast modem

Last Modified: 2013-12-14
I had just purchased a watchguard xtm 21-w and want to it up but am having a difficult time.  I have gone through the wizard and put in all the correct parameters but I cannot connect to the internet.  I have a static IP with comcast and have it working with my linksys router.  I can connect to the internet that way but want to remove the linksys wireless and put in this new firewall.  Are there policies that need to be but into place to get the internet working.  The external IP for the firewall is and gateway is  ETH1 is default at  I have the comcast modem plugged into ETH0 (External) and the lan line plugged int ETH1.
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