Re: [squid-users] No data to process error ?

Odd.. but you say you are using Squid-2.3.. if so have you compiled it
with --disable-internal-dns? (if not, /etc/hosts is ignored and
Squid-2.3 only uses DNS). I guess you have as it seems some requests
works, and it only hangs on the requests where you see the supposedly
harmless warning "no data to process" in cache.log.

I would recommend using the DNS registered FQDN of the server, or an IP
address. But I am quite unsure on what is going on here. If hostname
resolution was the problem nothing should work. Can you please try
upgrading to a more current Squid version such as 2.4.STABLE2?

Hint on iptables: what you are looking for is done by using DNAT.
Requires IP forwarding to be enabled and return traffic from the server
to be routed via the iptables box. (the latter can be forced by also
using SNAT, but then hides the clients real IP from your server).

--
Henrik Nordstrom
Squid Hacker
Andrew Loughnan wrote:
> 
> I should probably start with what I am trying to do.
> 
> I running an redhat 7.1 box as firewall/gateway/cache server with a Win
> 2k Server and Exchange 2k Server.  I am trying to get OWA to work
> through squid as I cannot work out yet how to do redirections from ext
> ip:port to internal ip:port in iptables.  I can get this to work
> internally, but not from the internet coming in.  It seems I can get to
> the IIS internal default page, and can follow the redirection in the
> squid access.log but if try to go anywhere below the default web page it
> just sits there and then tells me connection refused in IE.
> 
> Access.log to IIS default home page
> 1000810363.893    102 210.8.232.2 TCP_MISS/200 1489 GET
> http://postman.staff/ - DIRECT/postman.staff text/html
> 1000810368.942    919 210.8.232.2 TCP_MISS/200 3097 GET
> http://postman.staff/pagerror.gif - DIRECT/postman.staff image/gif
> 
> CACHE.LOG
> 2001/09/18 20:52:43| clientReadRequest: FD 7: no data to process ((11)
> Resource temporarily unavailable)
> 2001/09/18 20:52:48| The request GET
> http://postman.staff:80/pagerror.gif is ALLOWED, because it matched
> 'owa'
> 2001/09/18 20:52:48| clientReadRequest: FD 7: no data to process ((11)
> Resource temporarily unavailable)
> 
> When I try to get to http://www.sjc.vic.edu.au:8080/exchange/username
> ACCESS.LOG
> 1000810456.356     69 210.8.232.5 TCP_MISS/401 457 GET
> http://postman.staff/exchange/andrewl - DIRECT/postman.staff text/html
> 1000810471.198    916 210.8.232.5 TCP_MISS/302 383 GET
> http://postman.staff/exchange/andrewl - DIRECT/postman.staff text/html
> 
> CACHE.LOG
> 2001/09/18 20:52:48| clientReadRequest: FD 7: no data to process ((11)
> Resource temporarily unavailable)
> 2001/09/18 20:54:16| The request GET
> http://postman.staff:80/exchange/andrewl is ALLOWED, because it matched
> 'owa'
> 2001/09/18 20:54:16| clientReadRequest: FD 7: no data to process ((11)
> Resource temporarily unavailable)
> 2001/09/18 20:54:30| The request GET
> http://postman.staff:80/exchange/andrewl is ALLOWED, because it matched
> 'owa'
> 2001/09/18 20:54:31| clientReadRequest: FD 7: no data to process ((11)
> Resource temporarily unavailable)
> 
> AND Says
> The requested URL could not be retrieved
> 
> ------------------------------------------------------------------------
> --------
> 
> While trying to retrieve the URL: http://postman.staff/exchange/andrewl/
> 
> The following error was encountered:
> 
> Unable to determine IP address from host name for postman.staff
> The dnsserver returned:
> 
> Name Error: The domain name does not exist.
> This means that:
> 
>  The cache was not able to resolve the hostname presented in the URL.
>  Check if the address is correct.
> 
> I have added postman.staff to the hosts file
> 
> Anyway my config is squid.conf
> 
> 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 staff src 10.0.1.0/255.255.255.0
> acl owa dst 10.0.1.4/255.255.255.255
> acl owad dstdomain postman.staff # exhange server_name.domain
> acl cache dst eth0
> acl SSL_ports port 443 563
> acl Safe_ports port 80 443 563 70 210 1025-65535
> 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 CONNECT method CONNECT
> 
> http_access allow localhost
> http_access allow owa
> http_access allow owad
> http_access allow cache
> http_access allow staff
> http_access deny all
> 
> httpd_accel_host postman.staff
> httpd_accel_port 80
> httpd_accel_with_proxy on
> httpd_accel_uses_host_header off
> 
> always_direct allow owa
> always_direct allow owad
> never_direct deny cache
> never_direct deny all
> 
> I have got the IIS server on port 80
> 
> I can't understand why I can get to the default page but not any furhter
> Any help would be greatly appreciated
> 
> Andrew Loughnan, MCP
> Computer Services Manager
> St Josephs College
> 135 Aphrasia St
> Geelong, Victoria Australia
> 3220
> Ph +61 3 5226-8100
> DD +61 3 5226-8165
> Fax +61 3 5221-6983
> E-mail: mailto:andrewl@sjcs.melb.catholic.edu.au
> http://www.sjcs.melb.catholic.edu.au
> 
> -----Original Message-----
> From: hno@hem.passagen.se [mailto:hno@hem.passagen.se] On Behalf Of
> Henrik Nordstrom
> Sent: Tuesday, 18 September 2001 5:24 PM
> To: Andrew Loughnan
> Cc: Squid-Users (E-mail)
> Subject: Re: [squid-users] No data to process error ?
> 
> This warning should be harmless.
> 
> Can you describe your problem in more detail?
> 
> --
> Henrik Nordstrom
> Squid Hacker
> 
> Andrew Loughnan wrote:
> >
> > I am getting an error in the cache.log  "2001/09/18 15:32:06|
> > clientreadrequest: FD 15: no data to process ((111) resource
> > temporarily unavailable )"
> >
> > I am running Squid 2.3.SATBLE4 Linux 7.1, I am trying to get squid to
> > redirect to internal OWA server
> >
> > Any Idea's anyone
> >
> > Andrew Loughnan
> > Computer Services Manager
> > St Josephs College
> > 135 Aphrasia St
> > Geelong, Victoria Australia
> > 3220
> > Ph +61 3 5226-8100
> > DD +61 3 5226-8165
> > Fax +61 3 5221-6983
> > E-mail: <mailto:andrewl@sjc.vic.edu.au>
> > WWW: <http://www.sjcs.melb.catholic.edu.au/>