I need an extended acl for two hosts (192.168.51.1 and 192.168.51.2) connected to a 2950, which is connected to G0/1 on my router (see attachment). I want local hosts on 192.168.50.0/24 and hosts from the internet to access these servers. I know there's a lot of other stuff that I need to configure (ie. ports, destination hosts address), but this is just to start me off. Thanks in advance.
It's not entirely clear whay you want. If you simply want an acl that allows all IP from Internet and internal to those hosts then
access-list 101 permit ip any host 192.168.51.1
access-list 101 permit ip any host 192.168.51.2
ip access-group 101 out
Note you don't need to have the LAN address ie. 192.168.50.0/24 because you have to use a source address of any because of the Internet addresses.