Commit 3f196eb5 authored by Mark Glines's avatar Mark Glines Committed by David S. Miller
Browse files

[TCP]: Use default 32768-61000 outgoing port range in all cases. 



This diff changes the default port range used for outgoing connections,
from "use 32768-61000 in most cases, but use N-4999 on small boxes
(where N is a multiple of 1024, depending on just *how* small the box
is)" to just "use 32768-61000 in all cases".

I don't believe there are any drawbacks to this change, and it keeps
outgoing connection ports farther away from the mess of
IANA-registered ports.

Signed-off-by: default avatarMark Glines <mark@glines.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 278a3de5

net/ipv4/inet_connection_sock.c

+1 −3
Original line number Original line Diff line number Diff line
@@ -31,10 +31,8 @@ EXPORT_SYMBOL(inet_csk_timer_bug_msg); 




/*

/*

 * This array holds the first and last local port number.

 * This array holds the first and last local port number.

 * For high-usage systems, use sysctl to change this to

 * 32768-61000

 */

 */

int sysctl_local_port_range[2] = { 1024, 4999 };

int sysctl_local_port_range[2] = { 32768, 61000 };





int inet_csk_bind_conflict(const struct sock *sk,

int inet_csk_bind_conflict(const struct sock *sk,

			   const struct inet_bind_bucket *tb)

			   const struct inet_bind_bucket *tb)

net/ipv4/tcp.c

+0 −3
Original line number Original line Diff line number Diff line
@@ -2464,13 +2464,10 @@ void __init tcp_init(void) 
			order++)

			order++)

		;

		;

	if (order >= 4) {

	if (order >= 4) {

		sysctl_local_port_range[0] = 32768;

		sysctl_local_port_range[1] = 61000;

		tcp_death_row.sysctl_max_tw_buckets = 180000;

		tcp_death_row.sysctl_max_tw_buckets = 180000;

		sysctl_tcp_max_orphans = 4096 << (order - 4);

		sysctl_tcp_max_orphans = 4096 << (order - 4);

		sysctl_max_syn_backlog = 1024;

		sysctl_max_syn_backlog = 1024;

	} else if (order < 3) {

	} else if (order < 3) {

		sysctl_local_port_range[0] = 1024 * (3 - order);

		tcp_death_row.sysctl_max_tw_buckets >>= (3 - order);

		tcp_death_row.sysctl_max_tw_buckets >>= (3 - order);

		sysctl_tcp_max_orphans >>= (3 - order);

		sysctl_tcp_max_orphans >>= (3 - order);

		sysctl_max_syn_backlog = 128;

		sysctl_max_syn_backlog = 128;

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