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ipv6: Add icmp_echo_ignore_all support for ICMPv6

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Preventing the kernel from responding to ICMP Echo Requests messages
can be useful in several ways. The sysctl parameter
'icmp_echo_ignore_all' can be used to prevent the kernel from
responding to IPv4 ICMP echo requests. For IPv6 pings, such
a sysctl kernel parameter did not exist.

Add the ability to prevent the kernel from responding to IPv6
ICMP echo requests through the use of the following sysctl
parameter : /proc/sys/net/ipv6/icmp/echo_ignore_all.
Update the documentation to reflect this change.

Signed-off-by: Virgile Jarry <virgile@acceis.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Virgile Jarry 2018-08-10 17:48:15 +02:00 • committed by David S. Miller
parent 8f78004442
commit e6f86b0f7a
5 changed files with 22 additions and 4 deletions
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3
include/uapi/linux/sysctl.h
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@ -575,7 +575,8 @@ enum {
/* /proc/sys/net/ipv6/icmp */
enum {
NET_IPV6_ICMP_RATELIMIT=1
NET_IPV6_ICMP_RATELIMIT = 1,
NET_IPV6_ICMP_ECHO_IGNORE_ALL = 2
};
/* /proc/sys/net/<protocol>/neigh/<dev> */