Regarding the conditions for obtaining a visa at border crossings and ports, they are applied in accordance with the policy for obtaining an Egyptian visa, as mentioned previously.
But kindly note that in some ports, guarantee letter will be required and also permission from the tourism police, to leave the port and return and your travel agent will help you in this case by providing the guarantee letter.
It is therefore possible to apply for an Egyptian visa on arrival at the border control for the countries that take the visa upon arrival
However, it is strongly advised against crossing the land border as information on checkpoints that issue visas on arrival is not always up to date.
Thus, applying for a visa on arrival in Egypt can be done mainly at the following international checkpoints:

Cairo International Airport

Hurghada International Airport

St Catherine's International Airport

Borg El Arab International Airport in Alexandria

Sharm El Sheikh International Airport

Luxor International Airport

Egypt visa arrival policy applies to the following countries: the United States, Australia, New Zealand, the United Kingdom, Canada, all European Union countries, Norway, Russia, Ukraine, Georgia, Serbia, Malaysia, Macedonia, Japan, South Korea, China (as of May 2018).

If you are a citizen of one of these countries, you can obtain a visa with your passport information, personal information, and details about your travel plans upon arrival at an Egyptian port of entry. The visa on arrival is usually valid for 30 days.