Re: [squid-users] apache + squid as forward and reverse proxy on a head node?

On 29/03/11 20:58, Chris Davis wrote:
> Is it possible on a single server to have apache running along with squid set up
> as both a forward and reverse proxy? I'm running into a problem where requests
> sent through the forward proxy seem to be redirected to the reverse proxy and I
> always get a copy of the front page of my site.
>
>
> I'm setting up a small cluster where only the head node has a connection to the
> internet. This head node is then connected to a group of nodes via a local
> network, who can only connect to the internet via a forward proxy. Recently I
> tried to set up squid also as a reverse proxy for an apache server on the head
> node, but I could only get squid working either as a forward or reverse proxy,
> but not both. I've tested this using the squid.conf shown below by only
> commenting out the two lines at the end associated with each mode (i.e. the
> http_port, etc). Based on this, it seems that (most of) my settings are sane.
>
> When I enable both a reverse and forward proxy, the problem is that any of the
> requests coming from the nodes on the local network get redirected to the apache
> server. I've tested this with wget, and no matter what URL I put in, I get the
> front page of my site. The reverse proxy works fine.
>
> I'm using squid 2.7.STABLE7 along with Apache 2.2.14, and have set up apache to
> listen on port 81, with squid listening on port 3128.
>
> Any help/pointers would be greatly appreciated.
>
> Best regards,
>
> Chris
>
> acl all src all
> acl manager proto cache_object
> acl localhost src 127.0.0.1/32
> acl to_localhost dst 127.0.0.0/8 0.0.0.0/32
> acl localnet src 10.0.0.0/8 # RFC1918 possible internal network
> acl localnet src 172.16.0.0/12 # RFC1918 possible internal network
> acl localnet src 192.168.0.0/16 # RFC1918 possible internal network
>
> acl web_ports port 80
> 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 lanhome src 10.1.1.0/255.255.255.0
> 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
> http_access allow lanhome
> http_access allow localhost
> http_access allow web_ports
>
> http_access deny all
> icp_access allow localnet
> icp_access deny all
> hierarchy_stoplist cgi-bin ?
> cache_dir ufs /var/spool/squid 1000 16 256
> access_log /var/log/squid/access.log squid
> refresh_pattern ^ftp: 1440 20% 10080
> refresh_pattern ^gopher: 1440 0% 1440
> refresh_pattern -i (/cgi-bin/|\?) 0 0% 0
> refresh_pattern (Release|Package(.gz)*)$ 0 20% 2880
> refresh_pattern . 0 20% 4320
>
> acl shoutcast rep_header X-HTTP09-First-Line ^ICY.[0-9]
> upgrade_http0.9 deny shoutcast
> acl apache rep_header Server ^Apache
> broken_vary_encoding allow apache
> extension_methods REPORT MERGE MKACTIVITY CHECKOUT
> hosts_file /etc/hosts
> coredump_dir /var/spool/squid
>
> visible_hostname mysite
> http_port 10.1.1.100:3128 transparent
>
> http_port x.x.x.x:80 accel defaultsite=mysite.com
> cache_peer 127.0.0.1 parent 81 0 originserver
>

This is *not* a forward-proxy / reverse-proxy combo. This is an
interception-proxy/reverse-proxy. Your OS firewall and NAT rules will
determine which mode the arriving packets get marked as.

You appear to be lacking any rules which limit the traffic sent to the
parent peer.

You need this above the top of your existing http_access config:

   acl localWebsite dstdomain mysite.com
   http_access allow localWebsite
   cache_peer_access 127.0.0.1 allow localWebsite

Amos

-- 
Please be using
   Current Stable Squid 2.7.STABLE9 or 3.1.11
   Beta testers wanted for 3.2.0.5