Troubleshooting slow networks with Wireshark // wireshark filters // Wireshark performance

You are guilty until proven innocent! The network is slow! But is it actually a network issue? Or is it an application issue. Chris Greer explains.

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// MENU //
00:00 ▶️ Introduction
00:35 ▶️ Wireshark filters introduction
02:20 ▶️ Regular IP filter
05:28 ▶️ Common filters
07:10 ▶️ Operators in filters
08:19 ▶️ Where to get the filter Power Point
08:55 ▶️ Filter shortcuts
11:20 ▶️ Filter buttons
12:10 ▶️ TCP analysis flags
15:16 ▶️ Filter buttons (cont'd)
17:15 ▶️ TCP reset
18:35 ▶️ How to apply filter as display filter
20:08 ▶️ Experience vs Theory
22:19 ▶️ Special filters
29:00 ▶️ Time filters
38:22 ▶️ Consulting scenario
49:45 ▶️ HTTPS consulting scenario
55:33 ▶️ Other filters
56:46 ▶️ How to simplify p-caps
59:29 ▶️ Signature filters
01:01:39 ▶️ Quick recap
01:02:16 ▶️ Conclusion

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#wireshark #wiresharkfilters #networktroubleshooting

[SirPeterlll]

Yes to war stories. Maybe also examples on how to make (easy) home labs to play around with wireshark to find network and/or application issues.

[justinbridgman]

That was brilliant, I am returning to networking after a 5 year break and this work you guys are doing has given me a real boost in confidence that I am in the right place. I really enjoyed that, that data was enlightening, accessible and useful. Also interested to hear what that config was!!! Thank you very much

[mawutorquarshie]

Once again David has brought in someone experienced in wire shark to lead us into the world of Networking troubles. Thanks of this.

[davidbombal]

You are guilty until proven innocent! The network is slow! But is it actually a network issue? Or is it an application issue. Chris Greer explains.

// MENU //
00:00 ▶ Introduction
00:26 ▶ Intro
00:35 ▶ Wireshark filters introduction
02:20 ▶ Regular IP filter
05:28 ▶ Common filters
07:10 ▶ Operators in filters
08:19 ▶ Where to get the filter Power Point
08:55 ▶ Filter shortcuts
11:20 ▶ Filter buttons
12:10 ▶ TCP analysis flags
15:16 ▶ Filter buttons (cont'd)
17:15 ▶ TCP reset
18:35 ▶ How to apply filter as display filter
20:08 ▶ Experience vs Theory
22:19 ▶ Special filters
29:00 ▶ Time filters
38:22 ▶ Consulting scenario
49:45 ▶ HTTPS consulting scenario
55:33 ▶ Other filters
56:46 ▶ How to simplify p-caps
59:29 ▶ Signature filters
01:01:39 ▶ Quick recap
01:02:16 ▶ Conclusion

// MY STUFF //

// SOCIAL //

//CHRIS GREER //

// SPONSORS //

[ex]

Excellent. I've only been a network Admin 6 months, our Network Engineer retired and I was given the position and got my CCNA. There's so much I do not know. Its overwhelming I knew bare minimum about wireshark but it helped me fix 2 things. This really helped me learn a little more and in the spirit of one of the greatest greek philosophers Seneca says "Every night before going to sleep, we must ask ourselves: what weakness did I overcome today? What virtue did I acquire? " Wireshark is a network engineer virtue as far as I am concerned.

[oussemaghorbel]

This guest is simply amazing! Each time I listen to a session and learn a lot of useful knowledge from it

[lokeahrana]

After watching this video I feel like I learned something today. Thanks a lot, David for bringing such an amazing person to the show.

[michaeldawkins]

Thanks Chris and David for some great network knowledge content. One of the growing issues that I have is understanding broadcast traffic / trace coverage / segmentation (vlans).

[vyasG]

Thank you both for this series. This is gold. Looking forward for more videos on real world experiences. Really loved the consulting scenarios. The teaser in the end was a good one. Will be curiously waiting for that story!

[dwaynesudduth]

Another great collaboration by @David Bombal and @Chris Greer! The knowledge bombs dropped here are invaluable, thanks to both of you!

[joerockhead]

Thanks, David, & Chris. This was great. Would love to see a lot more from Chris. BTW @ 53:20 is how I enter my passwords. :)

[nghiaduy]

Thank you guys for keeping on this great series!!

[mashmasho]

I’m a pretty simple person. I see David Bombal posted a video, I hit like. Haven’t even watched it yet, but I know it will be fantastic! Love your content!

[Fzr_OPs]

Thank you very very much David and Chris, this series of videos of Wireshark are so usefull for me. Thanks to both for sharing your knowledge, greetings from Riviera Maya :)

[shaan]

Like always great contents! Thanks to you both for this WS series and many more. ❤😊

[Ranjeet_]

Chris is a legend. you got to appreciate david here, even though he knows things that Chris misses sometimes he gently remind him that as a question and doesn't try to show off. Have observed this with lot of guest, quality of a great host and something we could learn. keep bringing such content David. thank you

[jerrygawlicky]

Hey David I was watching the TLS run down you did with the other SME on encryption and TLS communication. However... I noticed something in my analysis and following along with the video., . I am gonna circle around to it today and take a second glance.. maybe check my f5 it may be effecting the handshake but.. for sure no certificate and or server done packets were within my tls handshake... just wanted to give you a heads up. Maybe they were encrypted or modified i haven't looked yet.. but none the less great stuff man... and chris is the man when it comes to wireshark and analsysis at the deep packet level. His shark fest tips have helped me identify many problems.. in the real world.

Keep up the awesome freedom of knowledge you guys give and dont charge for :)

Cheers!

[hamada]

Thanks both of you guys we need more videos on Wireshark I'm a NOC Engineer and I really want to add Wireshark to my skills as we know Wireshark helps you a lot if you know how to play with it I will join Chris Greer course maybe I will find what I'm looking for.

[abylaurancecherian]

Thanks for the wonderful session David & Chris... Looking forward for the war room sessions as well.

[androidandroid]

High David and Chris, thanks a lot for the TCP Deep Dive series. It helped a lot to start find network problems with Wireshark. As always it is hard to find the needle.