I've been searching for answers on this, but not many people seem to have this situation. Any advice is much appreciated!
Facts: home built in 1915. We reside in WI, in an area of heavy precipitation. We have owned it just over a year.

About the specific problem:
Our front porch sits in the foundation. It is roofed, but open on two sides to the elements. It leaks water into our basement when there is heavy rain or snow. It needs painting, so I am thinking I should tackle the leakage issue at the same time. The basement s unfinished, but the electrical box sits under the porch, hence it's getting wet. Also the wetness causes a funk, even with the use of dehumidifiers.
Would like to do this job ourselves, as the house has other fixes we'll have to contract.
Also, best paint for this situation?