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RepoForge源可以做为Centos官方源及EPEL源的补充，这样Centos下常用软件基本都可使用yum安装了。
Centos5：

rpm -ivh http://pkgs.repoforge.org/rpmforge-release/rpmforge-release-0.5.3-1.el5.rf.i386.rpm
rpm -ivh http://pkgs.repoforge.org/rpmforge-release/rpmforge-release-0.5.3-1.el5.rf.x86_64.rpm

Centos6：

rpm -ivh http://pkgs.repoforge.org/rpmforge-release/rpmforge-release-0.5.3-1.el6.rf.i686.rpm
rpm -ivh http://pkgs.repoforge.org/rpmforge-release/rpmforge-release-0.5.3-1.el6.rf.x86_64.rpm

国内使用sohu提供的镜像：

cat > /etc/yum.repos.d/mirrors-rpmforge <<EOF
http://mirrors.sohu.com/dag/redhat/el6/en/$ARCH/rpmforge
EOF
cat > /etc/yum.repos.d/mirrors-rpmforge-extras <<EOF
http://mirrors.sohu.com/dag/redhat/el6/en/$ARCH/extras
EOF
cat > /etc/yum.repos.d/mirrors-rpmforge-testing <<EOF
http://mirrors.sohu.com/dag/redhat/el6/en/$ARCH/testing
EOF

使用过ROS感觉其命令参数补全很强大，对于大多数命令不用特意记参数了，Linux也可通过安装bash-completion实现此功能。
bash-completion安装：

wget http://pkgs.repoforge.org/bash-completion/bash-completion-20060301-1.el6.rf.noarch.rpm
rpm -ivh bash-completion-20060301-1.el6.rf.noarch.rpm
echo '. /etc/bash_completion' >> /etc/bashrc 
source /etc/bashrc 

使用测试：

配置文件ACL后添加：

header_access X-Cache deny all
header_access X-Squid-Error deny all
header_access Via deny all
header_access Server deny all
header_access X-Cache deny all
header_access X-Cache-Lookup deny all

其它Header也可隐藏：

Accept         HTTP_ACCEPT
Accept-Charset         HTTP_ACCEPT-CHARSET
Accept-Encoding         HTTP_ACCEPT-ENCODING
Accept-Language         HTTP_ACCEPT-LANGUAGE
Accept-Ranges         HTTP_ACCEPT-RANGES
Age         HTTP_AGE
Allow         HTTP_ALLOW
Authorization         HTTP_AUTHORIZATION
Cache-Control         HTTP_CACHE-CONTROL
Connection         HTTP_CONNECTION
Content-Base         HTTP_CONTENT-BASE
Content-Disposition         HTTP_CONTENT-DISPOSITION
Content-Encoding         HTTP_CONTENT-ENCODING
Content-Language         HTTP_CONTENT-LANGUAGE
Content-Length         HTTP_CONTENT-LENGTH
Content-Location         HTTP_CONTENT-LOCATION
Content-MD5         HTTP_CONTENT-MD5
Content-Range         HTTP_CONTENT-RANGE
Content-Type         HTTP_CONTENT-TYPE
Cookie         HTTP_COOKIE
Date         HTTP_DATE
ETag         HTTP_ETAG
Expires         HTTP_EXPIRES
From         HTTP_FROM
Host         HTTP_HOST
If-Match         HTTP_IF-MATCH
If-Modified-Since         HTTP_IF-MODIFIED-SINCE
If-None-Match         HTTP_IF-NONE-MATCH
If-Range         HTTP_IF-RANGE
Last-Modified         HTTP_LAST-MODIFIED
Link         HTTP_LINK
Location         HTTP_LOCATION
Max-Forwards         HTTP_MAX-FORWARDS
Mime-Version         HTTP_MIME-VERSION
Pragma         HTTP_PRAGMA
Proxy-Authenticate         HTTP_PROXY-AUTHENTICATE
Proxy-Authentication-Info         HTTP_PROXY-AUTHENTICATION-INFO
Proxy-Authorization         HTTP_PROXY-AUTHORIZATION
Proxy-Connection         HTTP_PROXY-CONNECTION
Public         HTTP_PUBLIC
Range         HTTP_RANGE
Referer         HTTP_REFERER
Request-Range         HTTP_REQUEST-RANGE
Retry-After         HTTP_RETRY-AFTER
Server         HTTP_SERVER
Set-Cookie         HTTP_SET-COOKIE
Title         HTTP_TITLE
Transfer-Encoding         HTTP_TRANSFER-ENCODING
Upgrade         HTTP_UPGRADE
User-Agent         HTTP_USER-AGENT
Vary         HTTP_VARY
Via         HTTP_VIA
Warning         HTTP_WARNING
WWW-Authenticate         HTTP_WWW-AUTHENTICATE
Authentication-Info         HTTP_AUTHENTICATION-INFO
X-Cache         HTTP_X-CACHE
X-Cache-Lookup         HTTP_X-CACHE-LOOKUP
X-Forwarded-For         HTTP_X-FORWARDED-FOR
X-Request-URI         HTTP_X-REQUEST-URI
X-Squid-Error         HTTP_X-SQUID-ERROR
Negotiate         HTTP_NEGOTIATE
X-Accelerator-Vary         HTTP_X-ACCELERATOR-VARY
Other:         HTTP_OTHER:

Squid3.0版本使用参数：

reply_header_access Server deny all
reply_header_access X-Cache deny all
reply_header_access Warning deny all
reply_header_access Expires deny all
reply_header_access Cache-Control deny all
reply_header_access age deny all

参考：http://bbs.linuxtone.org/thread-131-1-1.html

在Openwrt下使用USB外挂存储磁盘IO会成为瓶颈，如果带宽足够纯粹做为透明代理可以关闭磁盘缓存功能。
1.修改缓存策略为null

cache_dir null /tmp

2.或者定义禁止缓存GET请求：

acl NCACHE method GET
no_cache deny NCACHE

3.缓存到/dev/shm目录，相当于ramdisk，openwrt无此设备。

cache_dir ufs /mnt/cache 256 16 256