Port Scanner - Port Scanning Assumptions

Port Scanning Assumptions

All forms of port scanning rely on the assumption that the targeted host is compliant with RFC 793 - Transmission Control Protocol. Although it is the case most of the time, there is still a chance a host might send back strange packets or even generate false positives when the TCP/IP stack of the host is non-RFC-compliant or has been altered. This is especially true for less common scan techniques that are OS-dependent (FIN scanning, for example). The TCP/IP stack fingerprinting method also relies on these kind of different network responses from a specific stimulus to guess the type of the operating system the host is running.

Read more about this topic:  Port Scanner

Famous quotes containing the words port and/or assumptions:

    The triumphs of peace have been in some proximity to war. Whilst the hand was still familiar with the sword-hilt, whilst the habits of the camp were still visible in the port and complexion of the gentleman, his intellectual power culminated; the compression and tension of these stern conditions is a training for the finest and softest arts, and can rarely be compensated in tranquil times, except by some analogous vigor drawn from occupations as hardy as war.
    Ralph Waldo Emerson (1803–1882)

    Assumptions of male superiority are as widespread and deep rooted and every bit as crippling to the woman as the assumptions of white supremacy are to the Negro.... this is no more a man’s world than it is a white world.
    Student Non-Violent Coordinating Committee, African American civil rights organization. SNCC Position Paper (Women in the Movement)