[squid-users] SSL settings

Hi I'm running squid on Ubuntu Gutsy (2.6.14). I'm getting problems
with SSL connections intermittently, I'm wondering what SSL options
should be setting in squid.conf and if there any best practices. My
conf has the following values which is basically the default Ubuntu
vaules. Should we be setting anything for:

https_port,
ssl_unclean_shutdown
ssl_engine
sslproxy_client_certificate
sslproxy_client_key
sslproxy_version
sslproxy_cipher
sslproxy_cafile
sslproxy_capath
sslproxy_flags
sslpassword_programn

Could there be any other obvious reason for SSL request failing intermittently?

=squid.conf=
http_port 3128
hierarchy_stoplist cgi-bin ?
acl QUERY urlpath_regex cgi-bin \?
cache deny QUERY
acl apache rep_header Server ^Apache
broken_vary_encoding allow apache
cache_dir ufs /var/spool/squid 100 16 256
access_log /var/log/squid/access.log squid
hosts_file /etc/hosts
refresh_pattern ^ftp: 1440 20% 10080
refresh_pattern ^gopher: 1440 0% 1440
refresh_pattern . 0 20% 4320
acl all src 0.0.0.0/0.0.0.0
acl manager proto cache_object
acl localhost src 127.0.0.1/255.255.255.255
acl to_localhost dst 127.0.0.0/8
acl SSL_ports port 443 # https
acl SSL_ports port 563 # snews
acl SSL_ports port 873 # rsync
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 Safe_ports port 631 # cups
acl Safe_ports port 873 # rsync
acl Safe_ports port 901 # SWAT
acl purge method PURGE
acl CONNECT method CONNECT
http_access allow manager localhost
http_access deny manager
http_access allow purge localhost
http_access deny purge
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
acl our_networks src 192.168.0.0/16
http_access allow our_networks
http_access allow localhost
http_access deny all
icp_access allow all
coredump_dir /var/spool/squid
extension_methods REPORT MERGE MKACTIVITY CHECKOUT

-- 
Sincerely,
Joel Duckworth