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24-02-2014, 16:12 door [Account Verwijderd]

In computer networking, reverse DNS lookup or reverse DNS resolution (rDNS) is the determination of a domain name that is associated with a given IP address using the Domain Name System (DNS) of the Internet. [...] A forward-confirmed reverse DNS (FCrDNS) verification can create a form of authentication showing a valid relationship between the owner of a domain name and the owner of the server that has been given an IP address. While not very thorough, this validation is strong enough to often be used for whitelisting purposes, mainly because spammers and phishers usually can't pass verification for it when they use zombie computers to forge domains. source:https://en.wikipedia.org/wiki/Reverse_DNS_lookup Kan best zijn dat je AV of iets dergelijks dit doet. Port 3680 is wel registered, maar niet een wellknown port. Dus terwijl het niet wordt aangeraden, kan dit poortje door iedere programma gebruikt worden, niks speciaals https://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers

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