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Dropped due to TLS engine error: FLOW_TIMEOUT[5]

I appreciate that other people have raised this issue before, but I am having problems with a specific IOT device trying to send a data packet to the cloud.

This particular device (which reports the salt quantity in a water softener) causes the following error:

2022-03-07 13:05:08SSL/TLS inspectionmessageid="19006" log_type="SSL" log_component="SSL" log_subtype="Error" severity="Information" user="" src_ip="192.168.1.193" dst_ip="18.193.34.83" user_group="" src_country="R1" dst_country="DEU" src_port="52708" dst_port="443" app_name="" app_id="0" category="Information Technology" category_id="29" con_id="1688866560" rule_id="1" profile_id="1" rule_name="Exclusions by website or category" profile_name="Maximum compatibility" bitmask="Valid" key_type="KEY_TYPE__RSA" key_param="RSA 2048 bits" fingerprint="a9:a0:f0:b5:bc:21:6f:26:a8:01:49:5d:33:c5:0e:dc:62:2f:3d:53" resumed="0" cert_chain_served="TRUE" cipher_suite="TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256" sni=".....aylanetworks.com" tls_version="TLS1.2" reason="Dropped due to TLS engine error: FLOW_TIMEOUT[5]" exception="" message=""

I have tried everything to try and exclude this device from all forms scanning (but clearly am doing something wrong). How can I ensure that this device stays clear of any form of firewall processing?

Thanks.



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  • Hi,

    now what you are seeing is quite common in the SSL/TLS log, what you need to determine is if the reported failures are actually affecting the performance of the device. If the exception is setup correctly then your traffic will not be affected, though the issue does raise possibility of the external site having network issues.

    Ian

    XG115W - v19.5.1 mr-1 - Home

    If a post solves your question please use the 'Verify Answer' button.

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