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network_stuff:wireshark-troubleshoot

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network_stuff:wireshark-troubleshoot [2024/06/23 10:11] – created jotasandokunetwork_stuff:wireshark-troubleshoot [2024/07/02 10:47] (current) – jotasandoku
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 ==== Initial Checks ==== ==== Initial Checks ====
-  * **Packet Loss**: Look for signs of packet loss. Go to ''Statistics > Conversations > TCP'' tab and check for any retransmissions, duplicate ACKs, or triple duplicate ACKs.+  * **Packet Loss**: Look for signs of packet loss. Go to ''Statistics > Conversations > TCP'' tab and check for any retransmissions ''tcp.analysis.retransmission'', duplicate ACKs, or triple duplicate ACKs.
   * **TCP Window Size**: Analyse the TCP window size to ensure it's not causing bottlenecks. Use ''Statistics > TCP Stream Graphs > Window Scaling'' to visualise window sizes.   * **TCP Window Size**: Analyse the TCP window size to ensure it's not causing bottlenecks. Use ''Statistics > TCP Stream Graphs > Window Scaling'' to visualise window sizes.
   * **Fragmentation**: Check for IP fragmentation which can cause delays. Apply the filter ''ip.flags.mf == 1'' or ''ip.frag_offset > 0''.   * **Fragmentation**: Check for IP fragmentation which can cause delays. Apply the filter ''ip.flags.mf == 1'' or ''ip.frag_offset > 0''.
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 ==== TLS Handshake Analysis ==== ==== TLS Handshake Analysis ====
-  * **Check Handshakes**: Filter for ''tls.handshake'' to ensure handshakes are completing without excessive delays or retries. Handshake issues can indicate problems with certificate exchange or encryption setup.+  * **Check Handshakes**: Filter for ''tls.handshake'' to ensure handshakes are completing without excessive delays or retries. Handshake issues can indicate problems with certificate exchange or encryption setup. DO this: ''tls.handshake'' + ''Statistics > I/O Graphs'' to visualize the handshake durations over time.
   * **TLS Record Analysis**: Investigate ''tls.record'' for any records showing errors or alerts.   * **TLS Record Analysis**: Investigate ''tls.record'' for any records showing errors or alerts.
  
network_stuff/wireshark-troubleshoot.1719137495.txt.gz · Last modified: by jotasandoku

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