Wireshark Combine Filters

Wireshark Combine Filters In Wireshark, filters are essential for refining the captured data and analyzing specific protocols or events. You can combine multiple filters using logical operators (&&, ||, !), and they are executed in sequence to extract the desired packets. Below is a detailed table and explanation of combining filters with examples.

Logical Operators in Wireshark Filters:

OperatorDescriptionExample
&&Logical ANDip.src == 192.168.1.1 && tcp.port == 80
||Logical ORip.src == 192.168.1.1 || ip.dst == 192.168.1.2
!Logical NOT (negation)!tcp.port == 80 (exclude HTTP traffic)

Example Filters

TaskFilter Combination Example
Capture HTTP requests from a specific IPip.src == 192.168.1.10 && tcp.port == 80
Capture HTTP or HTTPS traffictcp.port == 80 || tcp.port == 443
Exclude a specific IP from capture!(ip.addr == 192.168.1.5)
Capture only traffic on a specific subnetip.addr == 192.168.1.0/24
Capture only DNS trafficudp.port == 53 || tcp.port == 53
Exclude all ICMP traffic!(icmp)

Execution Flow

  1. Apply the first filter (e.g., ip.src == 192.168.1.10), capturing packets where the source IP is 192.168.1.10.
  2. Combine with the second filter using the logical operator (e.g., tcp.port == 80) to further narrow the results.
  3. Use additional filters as needed to build complex queries that match your specific criteria.

Detailed Example:

If you want to capture all HTTP traffic originating from 192.168.1.10 but exclude traffic to port 443 (HTTPS), you would write:

ip.src == 192.168.1.10 && tcp.port == 80 && !(tcp.port == 443)

This filter will:

  • Capture all traffic from 192.168.1.10
  • Filter for HTTP (port 80)
  • Exclude any traffic going to HTTPS (port 443)

Tips:

  • Use parentheses for grouping and managing precedence when combining complex filters.
  • Wireshark provides autocomplete as you type filters, making it easier to avoid syntax errors.

This method allows for very flexible packet analysis tailored to your needs.

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