Disable IPv6: Difference between revisions

Revision as of 20:06, 28 October 2018

The kernel option ipv6.disable=1 disables the whole IPv6 stack
If using the kernel option is not possible, add the following parameters to /etc/sysctl.conf:

# Disable IPv6
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1
net.ipv6.conf.eth0.disable_ipv6 = 1
...

to prevent configuration of IPv6 for listed interfaces.

To force ntpd to not use IPv6 add -4 to

CMDLINE="/usr/sbin/ntpd -4 -g"

in /etc/rc.d/rc.ntpd

To force sshd to listen IPv4 only add

AddressFamily inet

to /etc/ssh/sshd_config

To force httpd to listen IPv4 only, specify an IPv4 address on all Listen directives, for example,

Listen 0.0.0.0:80

(in /etc/httpd/httpd.conf and/or /etc/httpd/extra/httpd-ssl.conf)

To disable IPv6 in sendmail use the option Family=inet in DAEMON_OPTIONS and CLIENT_OPTIONS

@@ Line 11: / Line 11: @@
 in <code>/etc/rc.d/rc.ntpd</code>
 *To force <code>sshd</code> to listen IPv4 only add
-<pre># Listen IPv4 only
+<pre>AddressFamily inet</pre>
-AddressFamily inet</pre>
+to <code>/etc/ssh/sshd_config</code>
-to the end of <code>/etc/ssh/sshd_config</code>
 *To force <code>httpd</code> to listen IPv4 only, specify an IPv4 address on all Listen directives, for example,
 <pre>Listen 0.0.0.0:80</pre>

Disable IPv6: Difference between revisions

Revision as of 20:06, 28 October 2018

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