zcv
zcv — Zorp Content Vectoring Server
Synopsis
zcv [options]
Description
The Zorp Content Vectoring Server (ZCV) is a content scanning framework providing stream
and file scanning services for zorp(8). ZCV runs as a separate
application and can be accessed over TCP, UNIX domain sockets and standard input and output
file handles. The behaviour of ZCV can be controlled via the
zcv.cfg(5)
configuration file.
Options
- --verbose <verbosity> or -v <verbosity>
Set verbosity level to <verbosity>, or if <verbosity> is omitted increment it by one. Default the verbosity level is 3; possible values are 0-10.
- --no-syslog or -l
Send log messages to the standard output instead of syslog. This option implies foreground mode, overriding the contradicting process options if present.
- --log-spec <spec> or -s <spec>
Set verbosity mask on a per category basis. The format of this value is described in zorp(8).
- --log-tags or -T
Enable logging of message tags.
- --foreground or -F
Do not daemonize, run in the foreground.
- --help or -h
Display a brief help message.
- --zorp-mode <ctrl-fd> or -z <ctrl-fd>
Start in Zorp mode using the <ctrl-fd> file descriptor and remain in the foreground. In this mode only a single scan is performed on the data on the standard input. Results are sent to the standard output. (Naturally, log messages are not sent to the standard output in this mode, as this would interfere with the scanning results.) This mode is used mainly for testing purposes.
- --rule-group <rule-group> or -R <rule-group>
The value for the zcv_rule_group routing variable in Zorp mode.
- --config <file> or -c <file>
Use the configuration file <file> instead of the default
/etc/zcv/zcv.cfgfile.- --pidfile <file> or -P <file>
Use <file> as pid file instead of the default
/var/run/zcv/zcv.pidfile.
Operation
ZCV scans the contents of incoming streams. ZCV has multiple channels, each performing a possibly different set of actions on the incoming stream. These channels are called "scanpaths", i.e. a scanpath is an ordered set of modules and their associated settings. The scanpath to be used is selected based on meta information provided by Zorp and meta information gathered about the stream by ZCV itself. This scanpath selection mechanism is called "routing decision" and is controlled by the router rules.
To summarize, ZCV operates as follows: A connection is established between Zorp and ZCV. ZCV selects a scanpath (i.e. makes the routing decision) based the collected information, the router rules and information received from Zorp. The scanpath determines the modules to use and their associated settings. After the modules process the data received in the stream, the result of the scanning operation is sent back to Zorp.
Published on June 04, 2020
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