I would not expect this on a Sophos machine:
2021-11-25 16:32:12SSL/TLS inspectionmessageid="19017" log_type="SSL" log_component="SSL" log_subtype="Error" severity="Information" user="me" src_ip="xxxxxxxx" dst_ip="23.36.239.66" user_group="xxxxxx" src_country="R1" dst_country="DEU" src_port="55661" dst_port="443" app_name="" app_id="0" category="Software Updates" category_id="68" con_id="1391491648" rule_id="0" profile_id="1" rule_name="System exclusions" profile_name="Maximum compatibility" bitmask="" key_type="KEY_TYPE__UNKNOWN" key_param="Unknown" fingerprint="" resumed="0" cert_chain_served="TRUE" cipher_suite="TLS_AES_256_GCM_SHA384" sni="www.sophos.com" tls_version="TLS1.3" reason="Server did not respond to client hello" exception="" message=""
I've been watching this for a few days now.
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