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Squid3 to prefer IPV4 but still go for IPV6
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Squid3 to prefer IPV4 but still go for IPV6

ShamliShamli Member
edited July 2014 in Help

Hi all,

I've googled and got instructions on how to set it so that whenever I'm visiting website with both IPV4 and IPV6, squid should be using IPV4 instead of IPV6.
But after changes and restart,squid always go for IPV6.

I have done changes following this guide
and other guide.

Any help would be appreciated.

Below is my squid.conf

auth_param basic children 2
auth_param basic realm --Private Channel--
auth_param basic program /usr/lib/squid3/ncsa_auth /etc/squid3/squid_user
auth_param basic credentialsttl 2 hours
auth_param basic casesensitive on
acl all src all
acl class proxy_auth REQUIRED
acl ncsa_users proxy_auth REQUIRED
http_access allow ncsa_users
acl manager proto cache_object
acl localhost src ::1/128
acl to_localhost dst ::1/128
acl Dangerous_ports port 7 9 19 23 25 109 110 119
http_access allow manager localhost
http_access deny manager
http_access deny Dangerous_ports
http_access allow localhost
http_access deny all
http_port 8080
acl ipv6 src ::1/128
acl to_ipv6 dst ipv6
http_access deny ipv6 !all
tcp_outgoing_address !to_ipv6
tcp_outgoing_address xxxx:xxxx:xxxx::xxxx:xxxx to_ipv6
tcp_outgoing_address xxxx:xxxx:xxxx::xxxx:xxxx
access_log /var/log/squid3/access.log squid
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 .       0   20% 4320
via off
connect_timeout 1 minutes
server_persistent_connections off
dns_v4_fallback on
dns_v4_first on
forwarded_for off
request_header_access X-Forwarded-For deny all
cache deny all

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  • rds100rds100 Member

    Maybe /etc/gai.conf

    Put this there:

    precedence ::ffff:0:0/96  100


  • rm_rm_ Member

    I believe Squid is not affected by gai.conf (due to not using the system resolver functions which are configured by it), evident by the fact it will go for 6to4 (2002::) IPv6 addresses over IPv4, even though that shouldn't be the case.

    Thanked by 1rds100
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