2016-01-29 Running services on nonstandard ports doesn't change much
Some people give the advice to run sshd on a different port number to make less attacks happen. But with the constant scanning and automatic service fingerprinting that won't change much. This example is from shodan.io search engine but any scanner could find this. I consider shodan.io a good service: I use it at work to find misconfigured systems. The scanning shodan does is like the research any beginning interested attacker would do.