Hello Alex, I have upgrade the OS to Debian Linux 10 with Squid version 4.6. The /etc/squid/squid.conf is now basic with: http_access allow all (for testing) dns_v4_first on debug_option All,2 tail -f /var/log/squid/cache.log: --------- CONNECT clients.interact.mtel.eu:443 HTTP/1.1 User-Agent: Connect 3.1.0.18300 Host: clients.interact.mtel.eu ---------- 2019/07/29 09:50:52.762 kid1| 85,2| client_side_request.cc(752) clientAccessCheckDone: The request CONNECT clients.interact.mtel.eu:443 is ALLOWED; last ACL checked: all 2019/07/29 09:50:52.762 kid1| 85,2| client_side_request.cc(728) clientAccessCheck2: No adapted_http_access configuration. default: ALLOW 2019/07/29 09:50:52.762 kid1| 85,2| client_side_request.cc(752) clientAccessCheckDone: The request CONNECT clients.interact.mtel.eu:443 is ALLOWED; last ACL checked: all 2019/07/29 09:50:52.762 kid1| 44,2| peer_select.cc(281) peerSelectDnsPaths: Find IP destination for: clients.interact.mtel.eu:443' via clients.interact.mtel.eu 2019/07/29 09:50:52.762 kid1| 44,2| peer_select.cc(302) peerSelectDnsPaths: Found sources for 'clients.interact.mtel.eu:443' 2019/07/29 09:50:52.762 kid1| 44,2| peer_select.cc(303) peerSelectDnsPaths: always_direct = DENIED 2019/07/29 09:50:52.762 kid1| 44,2| peer_select.cc(304) peerSelectDnsPaths: never_direct = DENIED 2019/07/29 09:50:52.762 kid1| 44,2| peer_select.cc(308) peerSelectDnsPaths: DIRECT = local=0.0.0.0 remote=91.220.147.34:443 flags=1 2019/07/29 09:50:52.762 kid1| 44,2| peer_select.cc(317) peerSelectDnsPaths: timedout = 0 2019/07/29 09:51:52.793 kid1| 4,2| errorpage.cc(1259) BuildContent: No existing error page language negotiated for ERR_CONNECT_FAIL. Using default error file. 2019/07/29 09:51:52.793 kid1| 33,2| client_side.cc(582) swanSong: local=10.1.9.55:3128 remote=10.1.10.131:50756 flags=1 2019/07/29 09:51:58.822 kid1| 5,2| TcpAcceptor.cc(224) doAccept: New connection on FD 14 2019/07/29 09:51:58.822 kid1| 5,2| TcpAcceptor.cc(317) acceptNext: connection on local=[::]:3128 remote=[::] FD 14 flags=9 2019/07/29 09:51:58.822 kid1| 17,2| QosConfig.cc(126) getNfmarkFromConnection: QOS: Failed to retrieve connection mark: (-1) (1) Operation not permitted (Destination 10.1.9.55:3128, source 10.1.10.131:50767) 2019/07/29 09:51:58.823 kid1| 11,2| client_side.cc(1319) parseHttpRequest: HTTP Client local=10.1.9.55:3128 remote=10.1.10.131:50767 FD 9 flags=1 2019/07/29 09:51:58.823 kid1| 11,2| client_side.cc(1323) parseHttpRequest: HTTP Client REQUEST: Best regards, Sebastiaan -- Sent from: http://squid-web-proxy-cache.1019090.n4.nabble.com/Squid-Users-f1019091.html _______________________________________________ squid-users mailing list squid-users@xxxxxxxxxxxxxxxxxxxxx http://lists.squid-cache.org/listinfo/squid-users