I'd like to setup an 1800 router as a firewall, but with two internet feeds setup to share the load over both. I'm told that just configuring two default routes will cause the router to do per connection load balancing of outbound connections...is this correct? How would I handle inbound connections, ie. Mail, FTP, etc? Would I just configure the DNS record (ie. the mx record) to point to both public addresses? Thanks very much.
Yes, you can use DNS load balancing (round-robin only). i.e.
ftp.domain.com. 180 IN A ISP-A_IP_Address_Provided
ftp.domain.com. 180 IN A ISP-B_IP_Address_Provided