What is the difference between TCP 433, UDP 1194 and UDP 161
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 161.
TCP 443 on most networks is allowed as this is used for SSL
UDP 161 is used for SNMP