Squid と www6to4 を利用した IPv6 対応 Web Cache の構築

ftp://ftp.pasta.cs.uit.no/pub/Vermicelli/ から、 www6to4-latest.tar.gz (執筆時の最新バージョンは 1.5) を取ってきて、作業フォルダに解凍して compile する。

 % cd /usr/local/src
 % wget ftp://ftp.pasta.cs.uit.no/pub/Vermicelli/www6to4-latest.tar.gz
 % tar zxfv www6to4-latest.tar.gz
 % cd www6to4-*
 % make
 % sudo mv www6to4 /usr/local/sbin
 % sudo mv *.conf /etc
   

次に /etc に copy した設定ファイル www6to4.conf と www6to4_forward.conf を適宜編集する。

/etc/www6to4.conf は特に必要がなければ標準の設定のままにしておいて構わない。 導入後に画像ファイルが表示されないことが頻繁に起るようなら、pattern に関する設定の部分をすべてコメントにする。

 #       Sample Configuration file for the WWW6to4 IPv4 to IPv6 WWW Proxy

 # the forwardfile defines domain-specific routing
 #
 forwardfile             /etc/www6to4_forward.conf

 # To open the proxy to all, uncomment the following line:
 #listen-to              *
 # other example usage:
 #listen-to              124.207.250.245,127.0.0.1,::1
 # to explicitly state what is now the default:
 listen-to               127.0.0.1,::1
 listen-port             8000

 # default timeout used is short (5 seconds) for URLs that match a given
 # pattern and 60 seconds for all else.

 # patterns that cause short timeout when found (anywhere) in requested URL:
 #pattern .gif
 #pattern .png
 #pattern .jpg
 #pattern size=
 #pattern sz=
 #pattern doubleclick

 # You can multiply the timeout values by a factor.
 # For example, the line below makes the timeouts 10 and
 # 120 seconds respectively:
 #timeout-factor         2
   

/etc/www6to4_forward.conf は "* ." という部分以外はすべてコメントにする。

 #
 # This feature allows routing of HTTP requests via multiple proxies.

 # The syntax of each line is
 #
 # [proto://]target_domain[:port][/path] forwarding_domain[:port]

 # proto can be ftp, http, https
 # target_domain may contain a `*' wildcard

 # A '.' in the forwarding domain/port means that requests made to the
 # target domain are not forwarded but are made directly by the proxy
 #
 # Lines are checked in turn, and the last match wins.
 #
 # There is an implicit line equivalent to the following, which specifies that
 # anything not finding a match on the list is to go out without forwarding
 # or gateway protocol; like so:
 #
 *               .       # this is default implicit base config

 # In the following example configuration, everything is done directly except
 # for ftp requests and non-ftp requests to norwegian domains. Those are sent
 # via the Tromso University its www-proxy (listening here at port 5555).
 #
 # Note, that www6to4 does not support ftp requests itself, i.e. it can only
 # forward them to some other proxy that does support them.
 #.no            proxy.uit.no:5555
 #ftp://*        proxy.uit.no:5555

 # The example config below, sends everything through the proxy (at port 5555),
 # except for SSL connections and `local' connections within uit.no.
 #*            proxy.uit.no:5555
 #:443         .
 #uit.no       .
   

以上で www6to4 の install は完了です。

/etc/squid.conf に以下を追加する。

[line 100 くらい 〜]
 # OPTIONS WHICH AFFECT THE NEIGHBOR SELECTION ALGORITHM
 # -----------------------------------------------------------------------------

 #  TAG: cache_peer
 …
 #       NOTE: non-ICP neighbors must be specified as 'parent'.
 #
 #cache_peer hostname type 3128 3130
 cache_peer 127.0.0.1 parent 8000 3130