SMG Digital Gateway
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3.1.16
Tracing
3.1.16.1
PCAP tracings
In this menu, you may configure parameters for network traffic analysis and TDM protocol.
TCP dump — TCP–dump utility settings:
TCP dump is a utility for network traffic interception and analysis.
Interface
— interface for the network traffic interception.
Capture length limit
— size limit for intercepted packets
(0 – no limit), bytes.
Add filter —
packet filter for tcpdump utility.
Structure of filter expressions
Each expression that defines the filter includes a single or multiple primitives containing a single or
multiple object identifiers and preceding qualifiers. Object identifier may be represented by its name or number.
Object qualifiers:
1.
type
— indicates the object type specified by identifier. Object type may be represented
by the following values:
host
,
net
,
port
.
If object type is not defined,
host
value will be assumed.
2.
dir
— defines the direction towards the object. For this qualifier, the following values are
supported:
src
(object is a source),
dst
(object is a destination),
src or dst
(source or destination),
src and dst
(source and destination).
