FreeBsd Cache Dns Ä°le Microsoft IIS SMTP Service arasi dns query problemi

Microsoft SMTP Service hatasi:

An internal DNS error caused a failure to find the
remote server


Problem Tespiti:


Microsoft SMTP service dns query olarak UDP yerine TCP kullandigi icin FreeBSD cache dns kullanildigi zaman IIS Smtp Service dns sorgularini cozumleyemiyordu.
Microsoft support arastirmasi sonucunda edinilen bilgi dogrultusunda

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FreeBsd makinesinde yapilan ayar degisikligi (TCP ve UDP 53 izin verilmistir.)problem giderildigi testler sonucu anlasilmistir.


Çözüm Metodu:

FreeBsd OS' da:

ipfw add allow udp from any to any dst-port 53 in via fxp0 keep-state
ipfw add allow tcp from any to any dst-port 53 in via fxp0 keep-state