vscand(1M) System Administration Commands vscand(1M)NAMEvscand - vscan service daemon
SYNOPSIS
/usr/lib/vscan/vscand
DESCRIPTIONvscand is the daemon that handles virus scan requests from file systems
on file open and close operations. A file system may support enabling
and disabling of virus scanning on a per dataset basis, using that file
system's administrative command, for example zfs(1M).
If the file state or scan policy (see vscanadm(1M) requires that a file
be scanned, vscand communicates with external third-party virus scan‐
ners (scan engines) using the Internet Content Adaptation Protocol
(ICAP, RFC 3507) to have the file scanned.
A file is submitted to a scan engine if it has been modified since it
was last scanned, or if it has not been scanned with the latest scan
engine configuration (Virus definitions). The file's modified attribute
and scanstamp attribute are used to store this information. Once the
file is scanned, the modified attribute is cleared and the scanstamp
attribute is updated.
If the file is found to contain a virus, the virus is logged in sys‐
logd(1M), an audit record is written, and the file is quarantined (by
setting its quarantine attribute). Once a file is quarantined, attempts
to read, execute or rename the file will be denied by the file system.
The syslogd(1M) entry and the audit record specify the name of the
infected file and the violations detected in the file. Each violation
is specified as "ID - threat description", where ID and threat descrip‐
tion are defined in the X-Infection-Found-Header in ICAP RFC 3507;
Extensions.
By default, vscand connects to scan engines on port 1344. The port and
other service configuration parameters can be configured using
vscanadm(1M).
The vscan service is disabled by default, and can be enabled using
svcadm(1M).
EXIT STATUS
The following exit values are returned:
0 Daemon started successfully.
non-zero Daemon failed to start.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Availability │service/storage/virus-scan │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │Uncommitted │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOps(1), svcs(1), logadm(1M), svcadm(1M), syslogd(1M), vscandadm(1M),
zfs(1M), attributes(5), smf(5)NOTES
If a file is accessed using a protocol which does not invoke the file
system open and close operations, for example NFSv3, virus scanning is
not initiated on the file.
File content is transferred to the scan engines as cleartext data.
Administrative actions for the vscan service, such as enabling, dis‐
abling, or requesting a restart, can be performed using svcadm(1M). The
vscan service status can be queried using the svcs(1) command.
The vscan service is managed by the service management facility,
smf(5), under the service identifier:
svc:/system/filesystem/vscan
SunOS 5.11 6 Nov 2007 vscand(1M)
