11/30/2022 0 Comments Ephemeral port rangeFor details about these earlier releases, see the Microsoft knowledge-base article 196271, "When you try to connect from TCP ports greater than 5000, you receive the error 'WSAENOBUFS (10055). EPHEMERAL PORT RANGE HOW TOFor details about how to change a range under Windows, see the Microsoft knowledge-base article 929851, "The default dynamic port range for TCP/IP has changed in Windows Vista and Windows Server 2008."Įarlier releases of Windows use a default range of values from 1024 through 4999. The default ephemeral port range contains more than 28,000 ports (60999+1-3276828232). Windows Server 2008 and later use a default range of values from 49152 through 65535. You query and change the setting under HP-UX the same as is shown for Solaris in the previous section.Īs is the case with Solaris, any changes under HP-UX last only until the next time you start your system. Both of these ports default to values from 49152 through 65535. HP-UX uses two separate ephemeral port ranges, one for TCP and UDP. HP-UX also uses ndd to configure the IP stack, but it is found in the /usr/bin directory ( /usr/bin/ndd). Hewlett-Packard HP-UX Operating Environment In general, ports below 32768 are outside of the ephemeral port range. These changes last until the next time you start your system. # /usr/sbin/ndd /dev/tcp tcp_smallest_anon_port tcp_largest_anon_port # /usr/sbin/ndd -set /dev/tcp tcp_largest_anon_port 61000 Previously, ephemeral ports were assigned from the range 1024 - 65535. Most firewalls/NATs support range-based rules. And from a practical point of view a contiguous port range is better. # /usr/sbin/ndd -set /dev/tcp tcp_smallest_anon_port 49152 Yes, but all the other ports have to be above 1024.
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