Troubleshooting
261
Parameter
Description
Configuration Method
filter string.
SIP or H245 or H225
—Capture
SIP, H245 and H225 packets. It
depends on the supportive
protocol of the system.
RTP
—Capture RTP packets.
Default:
Custom
Packet Filter
String
Customizes the packet filter string.
Syntax:
PDiHost(s)+ Value
+Logical OpeOther Expression
Protocol
:
Values: ether, fddi, ip, arp, rarp, decnet,
lat, sca, moprc, mopdl, tcp and udp.
Application-level protocol, such as
http, dns and sip are not supported.
If no protocol is specified, all the
protocols are used.
Direction
:
Values: src, dst, src and dst, src or dst
If no source or destination is specified,
the "src or dst" keywords are applied.
For example: "host 10.2.2.2" is
equivalent to "src or dst host 10.2.2.2".
Host(s)
:
Values: net, port, host, portrange.
If no host(s) is specified, the "host"
keyword is used.
For example: "src 10.1.1.1" is equivalent
to "src host 10.1.1.1".
Logical Operations
:
Values: not, and, or.
Negation ("not") has highest
precedence. Alternation ("or") and
concatenation ("and") have equal
precedence and associate left to right.
For example:
"not tcp port 3128 and tcp port 23" is
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