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:
- Specify which carp(4) interface
sasyncd(8) should track master/slave
- Specify on which interface group
sasyncd(8) should increase the demote
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
- Controls how the sasyncd(8) master
host handles SADB_FLUSH messages to its slaves.
- 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
- Send a SADB_FLUSH message to the slaves as they connect, and act as
sync afterwards. This is the default.
- Never send SADB_FLUSH messages.
on address [family]
- 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.
- Force the daemon to run as master or slave. Normally only intended for
- 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
- Specify a sasyncd(8) peer IP address
or hostname. May be specified multiple times. For example:
- 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).
- 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.
sasyncd.conf file format first
appeared in OpenBSD 3.8.