What is the difference between TCP 433, UDP 1194 and UDP 53
For frequent everyday use and those that are on a normal network etc, it is best to use UDP 1194.
If you are on a restricted network or in a country with firewalls/restrictions (China) etc, use and try TCP 443 or UDP 53.
TCP 443 on most networks is allowed as this is used for SSL
UDP 53 is used for DNS lookups.