"We feel hurt that we are accused by Germany of lack of solidarity", said Orban, adding that "we protect our border with 8,000 armed soldiers for 24 hours, and that clearly means also a help for Germany, because refugees who are rejected, do not come to Germany".
The parties agreed to speed up the process of returning migrants who have applied for asylum in other European Union states to those countries, as mandated by current European Union law, but only if agreements were in place with the country where they first registered.
European shares gained on Tuesday after German Chancellor Angela Merkel's conservatives settled a row over migration and eased some anxieties of investors, though worries about trade wars remained. Mr Seehofer - whose party still faces pressure from the anti-immigration Alternative for Germany (AfD) in a regional election this October - has already threatened to start agitating again if the measures aren't implemented.
Earlier on Thursday, he sent ministry officials instructions urging asylum commissions to "safeguard the primary interests of the general public and not only the rights" of asylum-seekers.
Andrea Nahles, leader of the centre-left Social Democrats (SPD), and German Finance Minister Olaf Scholz, also an SPD member, stressed the agreement would not involve creation of any transit centres or unilateral action by Germany.
"Germany is a reliable partner in NATO", Merkel said.
Austria, which took over the EU's rotating presidency on 1 July, wants to strengthen the EU's external borders while avoiding internal controls on the continent.
Merkel said that securing the external borders of the European Union is not the creation of a "fortress against the people, brought by the smugglers".
However German media report that most of the irregular migrants entering Germany do not go through Austria anyway. Kurz indicated it would not be possible to push the idea of camps in non-EU countries during the next six months.
The FT said that three diplomats said the European Commission was studying whether it would be feasible to negotiate a deal with other big vehicle exporters such as the US, South Korea and Japan. And there is only one solution: closing off of the borders, and bringing the support over there.