Digi IX20-WAG4 User Manual page 781

Diagnostics
d. To create a filter that either captures or ignores packets from a particular port:
i. Click to expand Filter TCP/UDP port.
ii. Click  to add a TCP /UDP port.
iii. For IP TCP/UDP port to capture or ignore, type the number of the port to be
captured or ingored.
iv. For TCP or UDP port, select the type of transport protocol.
v. For Source or destination TCP/UDP port, select whether the filter should apply to
packets when the port is the source, the destination, or both.
vi. Click Ignore this TCP/UDP port if the filter should ignore packets that use this port.
By default, is option is disabled, which means that the filter will capture packets that
use this port.
vii. Click  to add additional port filters.
e. To create a filter that either captures or ignores packets from one or more specified MAC
addresses:
i. Click to expand Filter Ethernet MAC addresses.
ii. Click  to add a MAC address.
iii. For Ethernet MAC address, type the MAC address to be captured or ingored.
iv. For Source or destination Ethernet MAC address, select whether the filter should
apply to packets when the Ethernet MAC address is the source, the destination, or
both.
v. Click Ignore this MAC address if the filter should ignore packets that use this port. By
default, is option is disabled, which means that the filter will capture packets that use
this port.
vi. Click  to add additional MAC address filters.
f. To create a filter that either captures or ignores packets from one or more VLANs:
i. Click to expand Filter VLANs.
ii. Click  to add a VLAN.
iii. For The VLAN to capture or ignore, type the number of the VLAN.
iv. Click Ignore this VLAN if the filter should ignore packets that use this port. By default,
is option is disabled, which means that the filter will capture packets that use this
port.
v. Click  to add additional VLAN filters.
g. For Berkeley packet filter expression, type a filter using Berkeley Packet Filter (BPF)
syntax. See
syntax.
6. Add one or more interface to the capture filter:
a. Click to expand Device.
b. Click  to add an interface to the capture setting instance.
IX20 User Guide
Example filters for capturing data traffic
Analyze network traffic
for examples of filters using BPF
781