Ip Blocking from domain

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  • #5397

    Is there any way to get hostname/domain from tcp header using your library

    I need only google.com ( not IP ) by listening packets..
    or Should I need to sniff 53 port for DNS UDP’s

    what if dns cached by os or browser?

    I need real time host getting..

    Vadim Smirnov

    You can query all IP addresses corresponding google.com:

    Addresses: 2a00:1450:4002:800::1003
    and monitor packets to/from these IP’s. If you suspect that IP of google.com may change you can also monitor DNS queries and update the domain IP list accordingly.

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