dpd.zeek

DPD

Activates port-independent protocol detection and selectively disables analyzers if protocol violations occur.

Namespace:: DPD

Summary

Runtime Options

`DPD::ignore_violations`: `set` `&redef`	Analyzers which you don’t want to throw
`DPD::ignore_violations_after`: `count` `&redef`	Ignore violations which go this many bytes into the connection.
`DPD::max_violations`: `table` `&deprecated` = … `&default` = `5` `&optional` `&redef`	Deprecated, please see https://github.com/zeek/zeek/pull/4200 for details
`DPD::track_removed_services_in_connection`: `bool` `&redef`	Change behavior of service field in conn.log: Failed services are no longer removed.

Types

DPD::Info: record

The record type defining the columns to log in the DPD logging stream.

Redefinitions

Log::ID: enum

Add the DPD logging stream identifier.

DPD::LOG

connection: record

New Fields:

connection

dpd: DPD::Info &optional

service_violation: set [string] &default = { } &optional: The set of services (analyzers) for which Zeek has observed a violation after the same service had previously been confirmed.

Hooks

DPD::log_policy: Log::PolicyHook

A default logging policy hook for the stream.

Detailed Interface

Runtime Options

DPD::ignore_violations 

Type:

set [Analyzer::Tag]

Attributes:

&redef

Default:

{}

Redefinition:

from base/protocols/dce-rpc/main.zeek

+=:

Analyzer::ANALYZER_DCE_RPC

Redefinition:

from base/protocols/ntlm/main.zeek

+=:

Analyzer::ANALYZER_NTLM

Analyzers which you don’t want to throw

DPD::ignore_violations_after 

Type:: count
Attributes:: &redef
Default:: 10240

Ignore violations which go this many bytes into the connection. Set to 0 to never ignore protocol violations.

DPD::max_violations 

Type:: table [Analyzer::Tag] of count
Attributes:: &deprecated = “Remove in v8.1: This has become non-functional in Zeek 7.2, see PR #4200” &default = 5 &optional &redef
Default:: {}

Deprecated, please see https://github.com/zeek/zeek/pull/4200 for details

DPD::track_removed_services_in_connection 

Type:: bool
Attributes:: &redef
Default:: F

Change behavior of service field in conn.log: Failed services are no longer removed. Instead, for a failed service, a second entry with a “-” in front of it is added. E.g. a http connection with a violation would be logged as “http,-http”.