Был обзор бесплатных SSL сертификатов wildcard.

Так вот, все было ОК, но говно браузеры типо IE и его копии FireFox иногда ругались.

Так в чем же проблема ? Нужно установить промежуточные ssl сертификаты.

Открываем файл с нашим сертификатом(.crt) и добавляем в него следом промежуточный сертификат.

sub.class1.server.ca.pem
——BEGIN CERTIFICATE——
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——END CERTIFICATE——

sub.class2.server.ca.pem
——BEGIN CERTIFICATE——
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——END CERTIFICATE——