ip - Why doesn't Linux use the IANA Ephemeral port range? - Unix & Linux Stack Exchange
The Internet Assigned Numbers Authority (IANA) suggests the range 49152 to 65535 for dynamic or private ports. Many Linux kernels use the port range 32768 to 61000.
Even though there seems to be some historical deviation from IANA's suggested range, it seems awkward that Windows Vista, Windows 7, Windows Server 2008, FreeBSD 4.6+ and many others all have agreed upon this range and yet Linux still stands out.
Looking into it though, low and behold:
$ cat /proc/sys/net/ipv4/ip_local_port_range 32768 61000 Why hasn't Linux adopted the standard range?
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