[squid-users] debug a failure connection

[Vieri]

Hi,

I'm trying to understand what could cause Squid not to connect to the following site:

2020/03/12 11:48:24.115 kid1| 17,4| AsyncCallQueue.cc(55) fireNext: entering FwdState::ConnectedToPeer(0x561b8b5c7918, local=10.215.144.48:51303 remote=1.2.3.4:443 FD 784 flags=25, 0x561b8a7ee5b8/0x561b8a7ee5b8)
2020/03/12 11:48:24.115 kid1| 17,4| AsyncCall.cc(37) make: make call FwdState::ConnectedToPeer [call219229]
2020/03/12 11:48:24.115 kid1| 45,9| cbdata.cc(419) cbdataReferenceValid: 0x561b8b5c7918
2020/03/12 11:48:24.115 kid1| 45,9| cbdata.cc(419) cbdataReferenceValid: 0x561b8b5c7918
2020/03/12 11:48:24.115 kid1| 45,9| cbdata.cc(419) cbdataReferenceValid: 0x561b8a7ee5b8
2020/03/12 11:48:24.115 kid1| 17,3| FwdState.cc(447) fail: ERR_SECURE_CONNECT_FAIL "Service Unavailable"
        1.2.3.4:443


A direct connection by-passing Squid shows that the https site opens fine but with a 3DES cipher. In my Squid 4 test I set this temp values just in case:
tls_outgoing_options flags=DONT_VERIFY_PEER cipher=ALL options=ALL


I don't know how to interpret the messages previous to the ERR_SECURE_CONNECT_FAIL line. Do I need to send them all? Which debug options would be more useful?

Regards,

Vieri