configuration file for sasyncd
is the configuration file for
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
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 state on.
- 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
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
- Never send SADB_FLUSH messages.
- 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 is experimental.
- 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
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
file format first appeared
in OpenBSD 3.8