EndRun Sonoma D12 - Chapter Eight - Ipv6; Ipv6 Capabilities; Openssh; Apache HTTP

S o n o m a U s e r M a n u a l
67
"Smarter Timing Solutions"
Chapter Eight
IPv6
The Sonoma Time Servers support IPv6 out-of-the-box with a modern version 3.2.2 Linux kernel.
During network conguration, you have the option to disable IPv6 on either or both Ethernet ports.
The IPv6 addressing scheme will see expanding deployment in the near future due to the fact that
there are no longer any IPV4 addresses to be allocated in many regions of the world.
IPv6
Capabilities
The presence of an IPv6-capable kernel will automatically enable most of the IPv6 capabilities. By
default, autoconguration of the Ethernet interfaces via IPv6 Router Advertisements is enabled. To
disable acceptance of Router Advertisements, or to congure a static IPv6 address and default IPv6
gateway, and to congure IPv6 domain name servers, you must either run the interactive netconfig
script or use the front-panel keypad/display. Either method will allow you to congure your Ethernet
interface for both IPv4 and IPv6 operation. Using the netconfig script has the advantage that you
can also congure the hostname and domainname for the unit.
OpenSSH
By default, sshd is factory-congured to listen on both IPv4 and IPv6 addresses. It may be forced to
listen on either IPv4 only, or IPv6 only by editing the /etc/ssh/sshd_config le and modifying the Ad-
dressFamily directive, and then copying it to /boot/etc/ssh. Refer to the sshd_config man page for
detailed information (man sshd_config).
Apache HTTP
By default, httpd is factory-congured to listen on both IPv4 and IPv6 addresses. It may be forced
to listen on either IPv4 only, or IPv6 only by editing the /etc/httpd/httpd.conf conguration le and
adding a Listen directive, and then copying it to /boot/etc/httpd. Refer to the Apache HTTP docu-
mentation for details.
Net-SNMP
By default, snmpd is factory-congured to listen on both IPv4 and IPv6 addresses. This may be
changed by editing /etc/rc.d/rc.snmpd and modifying the agent address argument passed to snmpd at
start-up, and then copying it to /boot/etc/rc.d.