[squid-users] Configuring squid to work as an HTTPS proxy

Jobin George gjobin at vmware.com
Mon Jun 20 14:02:01 UTC 2016


I am trying to setup squid3 as an HTTPS proxy using the tutorial given [here][1]. I have properly setup the proxy settings in my browser and when I try to hit **HTTP** web sites, I am able to connect successfully. However, I keep getting a "Connection timed out error" whenever I hit an **HTTPS** protocol web site and the following error in my `/var/log/squid3/cache.log`:

    2016/06/20 19:12:47|  NF getsockopt(SO_ORIGINAL_DST) failed on local=<local_ip_address>:3129 remote=<remote_ip_address>:55209 FD 8 flags=33: (92) Protocol not available

Here is my /etc/squid3/squid.conf file (commented lines removed for brevity):


    auth_param basic program /usr/lib/squid3/basic_ncsa_auth /usr/etc/passwd
    auth_param basic casesensitive off
    auth_param basic credentialsttl 2 hours

    acl user_auth proxy_auth REQUIRED

    http_access allow user_auth

    acl SSL_ports port 443
    acl Safe_ports port 80          # http
    acl Safe_ports port 21          # ftp
    acl Safe_ports port 443         # https
    acl Safe_ports port 70          # gopher
    acl Safe_ports port 210         # wais
    acl Safe_ports port 1025-65535  # unregistered ports
    acl Safe_ports port 280         # http-mgmt
    acl Safe_ports port 488         # gss-http
    acl Safe_ports port 591         # filemaker
    acl Safe_ports port 777         # multiling http
    acl CONNECT method CONNECT

    http_access allow localhost
    http_access allow all
    http_port 3127

    https_port 3129 intercept ssl-bump generate-host-certificates=on dynamic_cert_mem_cache_size=4MB key=/etc/squid3/example.com.private cert=/etc/squid3/example.com.cert

    ssl_bump server-first all
    sslproxy_flags DONT_VERIFY_PEER
    sslproxy_cert_error deny all
    sslcrtd_program /usr/lib/squid3/ssl_crtd -s /var/lib/ssl_db -M 4MB sslcrtd_children 8 startup=1 idle=1
    coredump_dir /var/spool/squid3

    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

    always_direct allow all


I have spent a lot of time googling this error but could not arrive at a solution which would configure squid as an HTTP proxy. How do I get this working?

[1]: https://smoothnet.org/squid-proxy-with-ssl-bump/

Thanks & Regards

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