Errore stunnel HTTPS: 1408F09B: Routine SSL: SSL3_get_record: richiesta proxy https

Question

Sto configurando il proxy HTTPS con stunnel e squid.

Tuttavia, ho ricevuto la pagina di errore di Mozilla "Connessione sicura non riuscita", nel caso in cui sto effettuando richieste al browser tramite la porta 44444 (stunnel).

Cosa mi sfugge?

1. Nel caso in cui sto effettuando una richiesta diretta del browser a (https://192.168.0.101:44444) stunnel sta accettando connessioni sulla porta 44444 e sta inoltrando correttamente il traffico alla porta proxy squid (55555), di conseguenza, è stata ricevuta la pagina di errore squid.

2. Se sto facendo richieste tramite la porta squid (55555), tutto funziona correttamente.

Il certificato SSL è autofirmato. Generato da questo comando:

sudo openssl req -nodes -new -days 365 -newkey rsa:1024 -x509 -keyout serverkey.pem -out servercert.pem

stunnel.log

2020.10.01 17:54:05 LOG7[main]: Found 1 ready file descriptor(s)
2020.10.01 17:54:05 LOG7[main]: FD=4 events=0x2001 revents=0x0
2020.10.01 17:54:05 LOG7[main]: FD=6 events=0x2001 revents=0x1
2020.10.01 17:54:05 LOG7[main]: Service [squid] accepted (FD=3) from 10.140.37.30:42284
2020.10.01 17:54:05 LOG7[33]: Service [squid] started
2020.10.01 17:54:05 LOG7[33]: Option TCP_NODELAY set on local socket
2020.10.01 17:54:05 LOG5[33]: Service [squid] accepted connection from 10.140.37.30:42284
2020.10.01 17:54:05 LOG6[33]: Peer certificate not required
2020.10.01 17:54:05 LOG7[33]: TLS state (accept): before SSL initialization
2020.10.01 17:54:05 LOG3[33]: SSL_accept: 1408F09B: error:1408F09B:SSL routines:ssl3_get_record:https proxy request

stunnel.conf

chroot = /var/lib/stunnel4/
setuid = stunnel4
setgid = stunnel4

pid = /stunnel4.pid

debug = 7
output = /stunnel.log
syslog = no

cert = /etc/stunnel/servercert.pem
key = /etc/stunnel/serverkey.pem

verify = 1

CApath = /certs

CRLpath = /crls

client = no
[squid]
accept = 44444
connect = 55555

calamari.conf

acl localnet src 192.168.0.0/16

acl SSL_ports port 443
acl Safe_ports port 80
acl Safe_ports port 21
acl Safe_ports port 443
acl Safe_ports port 70
acl Safe_ports port 210
acl Safe_ports port 1025-65535
acl Safe_ports port 280
acl Safe_ports port 488
acl Safe_ports port 591
acl Safe_ports port 777
acl CONNECT method CONNECT


http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports

http_access allow localhost manager
http_access deny manager
http_access allow localnet
http_access allow localhost
http_access allow all

http_port 55555

coredump_dir /var/spool/squid
refresh_pattern ^ftp:           1440    20%     10080
refresh_pattern ^gopher:        1440    0%      1440
refresh_pattern -i (/cgi-bin/|\?) 0     0%      0
refresh_pattern (Release|Packages(.gz)*)$     0       20%     2880
refresh_pattern .               0       20%     4320

Answer 1

Va tutto bene con la configurazione sul lato stunnel. Il problema era con il mio client, a causa di un'errata configurazione, non avvia l'handshake SSL\TLS.