sasyncd.conf —
configuration file for sasyncd
sasyncd.conf is the configuration file for
the sasyncd(8) daemon.
The current line can be extended over multiple lines using a
backslash (‘\’). Comments can be put anywhere in the file
using a hash mark (‘#’), and extend to the end of the current
line. Care should be taken when commenting out multi-line text: the comment
is effective until the end of the entire block.
Since the file contains the shared secret key used to encrypt data
between this host and the others, /etc/sasyncd.conf
must be owned either by “root” or the “_isakmpd”
pseudo user and be readable only by this owner, e.g.
# chown root /etc/sasyncd.conf
# chmod 0600 /etc/sasyncd.conf
The following configuration settings are understood:
interface
interface- Specify which carp(4) interface
sasyncd(8) should track
master/slave state on.
group
group- Specify on which interface group
sasyncd(8) should increase the
demotion counter. This has the effect of suppressing
carp(4) preemption while initial
sasyncd(8) state is
established. The default is to use the “carp” group.
For more information on interface groups, see the
group keyword in
ifconfig(8).
flushmode
sync |
startup
|
never- Controls how the sasyncd(8)
master host handles SADB_FLUSH messages to its slaves.
sync- Pass any SADB_FLUSH messages along. For example, in this mode
sasyncd(8) will
synchronize an
ipsecctl -F command to all
connected slaves. For more information, see
ipsecctl(8).
startup- Send a SADB_FLUSH message to the slaves as they connect, and act as
sync afterwards. This is the default.
never- Never send SADB_FLUSH messages.
listen
on address [family]
[port port]- Specify a local IP address, hostname, or interface the
sasyncd(8) daemon should
listen on. The default is to listen on all local addresses. When using an
interface name, family may be given as
“inet” or “inet6” to only bind using the
specified address family. Finally, port can be used
to specify which TCP port
sasyncd(8) should listen to.
The default is to listen to port 500.
mode
master |
slave- Force the daemon to run as master or slave. Normally only intended for
debugging use.
mode
skipslave- Prevent the daemon from syncing SA or SPD messages where the source or
destination address is one of the configured peers. Intended to permit
IPsec pfsync(4) protection.
This mode is experimental.
peer
address- Specify a sasyncd(8) peer IP
address or hostname. May be specified multiple times. For example:
peer 10.0.0.2
peer 10.0.0.3
peer 10.0.0.4
sharedkey
key- The shared AES key used to encrypt messages between
sasyncd(8) hosts. This
configuration setting is required and must be either 16, 24 or 32 bytes
long (corresponding to AES using a 128, 192 or 256 bit key).
control
isakmpd |
iked
| all
|
none- By default, sasyncd(8) tracks
its local master/slave mode and toggles the passive mode of
isakmpd(8) accordingly. This
option can be changed to control
iked(8) instead, to control all
supported daemons at the same time, or to turn it off to synchronize SAs
only.
- /etc/sasyncd.conf
-
- /etc/examples/sasyncd.conf
-
The sasyncd.conf file format first
appeared in OpenBSD 3.8.