Using Wireshark

Julia Evans explains how she uses Wireshark:

Usually I use Wireshark to debug networking problems in production. My Wireshark workflow is:

  1. Capture packets with tcpdump (typically something like sudo tcpdump port 443 -w output.pcap
  2. scp the pcap file to my laptop (scp host:~/output.pcap .)
  3. Open the pcap file in Wireshark (wireshark output.pcap)

That’s pretty simple! But once you have a pcap file with a bunch of packets on your laptop, what do you do with it?

Wireshark is my go-to tool for diagnosing networking issues.

Related Posts

Managing Central Management Server

Chrissy LeMaire shows how you can use dbatools to manage Central Management Server and registered servers: It’s a super useful feature that not all DBAs know about. Since CMS data is stored in msdb and accessible via SMO, you can access it from SQL Server Management Studio or PowerShell modules like dbatools. Central Management Server’s essential […]

Read More

Checking File Sizes In SQL Server

Andy Mallon looks back at a contribution by Junior DBA Andy, this one on checking file sizes: This is every DBA’s favorite game. Figuring out what DMV contains the data you want. It turns out there are two places that database file size info is maintained. Each database has sys.database_files which has information for that database. The […]

Read More

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Categories

July 2018
MTWTFSS
« Jun  
 1
2345678
9101112131415
16171819202122
23242526272829
3031