How to identify the root cause of slow response from web server

asked 2019-11-21 16:00:55 +0000

Dear all,

May I know based on the wireshark captured, how can I identify the reason behind the webserver is giving a slow response when user query the url:

The server is having 1-1 NAT towards the ip which is done via Firewall.

As I checked, no network issue there.

Hence, appreciate your help what info I can extract from the wireshark as I'm kinda weak in analyzing wireshark packets, your kind explanation will truly enlighten me.

Thank you.

Wireshark capture

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Can you make the capture again?
The first capture has pieces from several different requests.
Would be nice to see from the beginning - DNS request for hris.encorp, -> TCP handshake -> HTTP GET -> HTTP timeout -> TCP FIN.

Chuckc gravatar imageChuckc ( 2019-11-21 17:01:34 +0000 )edit

Won't you also need a capture on, or better next to, the server? The issue might be the application on the server.

grahamb gravatar imagegrahamb ( 2019-11-21 17:14:30 +0000 )edit

That would be nice. The RTT in the SYN/ACKs looks pretty good so don't think network.

Frame #18:

[iRTT: 0.018374000 seconds]
[The RTT to ACK the segment was: 0.064190000 seconds]
Chuckc gravatar imageChuckc ( 2019-11-21 17:16:57 +0000 )edit