Messages in this thread | | | Date | Sun, 21 Feb 2010 09:58:54 +0800 | From | Cong Wang <> | Subject | Re: [net-next PATCH v5 0/3] net: reserve ports for applications using fixed port numbers |
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Octavian Purdila wrote: > On Saturday 20 February 2010 10:11:40 you wrote: > >> 2) I hope you could add some documentation to show the relations >> between ip_local_port_range and ip_local_reserved_ports. >> > > How does this sound: > > ip_local_reserved_ports - list of comma separated ranges > Specify the ports which are reserved for known third-party > applications. These ports will not be used by automatic port > assignments (e.g. when calling connect() or bind() with port > number 0). Explicit port allocation behavior is unchanged. > > The format used for both input and output is a comma separated > list of ranges (e.g. "1,2-4,10-10" for ports 1, 2, 3, 4 and > 10). Writing to the file will clear all previously reserved > ports and update the current list with the one given in the > input. > > Note that ip_local_port_range and ip_local_port_range settings > are independent and both are considered by the kernel when > determining which ports are available for automatic port > assignments. > > You can reserve ports which are not in the current > ip_local_port_range, e.g.: > > $ cat /proc/sys/net/ipv4/ip_local_port_range > 32000 61000 > $ cat /proc/sys/net/ipv4/ip_local_reserved_ports > 8080,9148 > > although this is redundant. However such a setting is useful > if later the port range is changed to a value that will > include the reserved ports.
This looks fine for me.
Thanks.
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