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Matt Bishop Office: 2209 Watershed Sciences Phone: +1 (530) 752-8060 Email: mabishop@ucdavis.edu |
Version of April 14, 2021 at 12:27AM
UNIX-based systems, including Linux, reserve network ports numbered 1023 and below for root-owned processes only. User processes must use ports with higher numbers. So, if the source port from a remote host has a source port of 536, it must have originated with a process that was at one time root. This is a UNIX standard, not an Internet one.
What problems can this scheme cause in a heterogeneous network?
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ECS 135, Computer Security Version of April 14, 2021 at 12:27AM
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