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:
Operator | Description | Example |
---|---|---|
&& | Logical AND | ip.src == 192.168.1.1 && tcp.port == 80 |
|| | Logical OR | ip.src == 192.168.1.1 || ip.dst == 192.168.1.2 |
! | Logical NOT (negation) | !tcp.port == 80 (exclude HTTP traffic) |
Example Filters
Task | Filter Combination Example |
---|---|
Capture HTTP requests from a specific IP | ip.src == 192.168.1.10 && tcp.port == 80 |
Capture HTTP or HTTPS traffic | tcp.port == 80 || tcp.port == 443 |
Exclude a specific IP from capture | !(ip.addr == 192.168.1.5) |
Capture only traffic on a specific subnet | ip.addr == 192.168.1.0/24 |
Capture only DNS traffic | udp.port == 53 || tcp.port == 53 |
Exclude all ICMP traffic | !(icmp) |
Execution Flow
- Apply the first filter (e.g.,
ip.src == 192.168.1.10
), capturing packets where the source IP is 192.168.1.10. - Combine with the second filter using the logical operator (e.g.,
tcp.port == 80
) to further narrow the results. - 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.