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Troubleshoot Bitdefender update fails using Wireshark


When your Bitdefender product cannot obtain product / signature updates from our Update Server, the Bitdefender Enterprise Support team may request a packet capture for troubleshooting the issue. For this purpose, we recommend using Wireshark, a free (open source) packet capture software broadly used for analyzing network traffic.


The Bitdefender Enterprise Support team usually requests a Wireshark capture for the following scenarios:

  • The endpoint or the relay server fail to retrieve updates from Bitdefender Update Server ( or from the local relay server with errors indicating that a content-filtering solution or a network firewall might be blocking or filtering the packets.

    For example, error code 1011, which indicates an IO time out in the Bitdefender product interface:

  • Excessive traffic bandwidth usage during the distribution of product / signature updates to target endpoints.


Follow the next instructions to capture network packets with Wireshark and send them to Bitdefender Enterprise Support team:

  1. Install the Wireshark application.

  2. Launch Wireshark.

  3. Click Capture > Options…

  4. Click the interface on which you need to capture packets.

  5. Click Start to start the capture.

  6. Reproduce the reported issue.


    Avoid running any internet application during the capture (close all web browsers, instant messengers etc.).

  7. After reproducing the issue, return to Wireshark and click Stop.

  8. Click File > Save as to save the capture as a default libpcap file format (.pcapng extension).

  9. Send the capture file to Bitdefender Enterprise Support team via the support ticket.