Adam Laycock

IT Engineer, Developer & Blogger

Caching Apple downloads on a Windows server

Yesterday I posted about caching apple downloads which was great but most of my schools do not have a linux server available nor do they have the spare equipment to setup anything that could be considered reliable enough.

Now we do have plenty of Windows capacity so we need to run squid on a Windows server.

A quick google and yes there is a version of squid for Windows which I installed to D:\Squid.

The default config is pretty good and is 2 line changes away from being a caching server and then only needs the rules for the Apple download servers.

1#
2# Recommended minimum configuration:
3#
4
5# Example rule allowing access from your local networks.
6# Adapt to list your (internal) IP networks from where browsing
7# should be allowed
8acl localnet src 10.0.0.0/8 # RFC1918 possible internal network
9acl localnet src 172.16.0.0/12 # RFC1918 possible internal network
10acl localnet src 192.168.0.0/16 # RFC1918 possible internal network
11acl localnet src fc00::/7 # RFC 4193 local private network range
12acl localnet src fe80::/10 # RFC 4291 link-local (directly plugged) machines
13
14acl SSL_ports port 443
15acl Safe_ports port 80 # http
16acl Safe_ports port 21 # ftp
17acl Safe_ports port 443 # https
18acl Safe_ports port 70 # gopher
19acl Safe_ports port 210 # wais
20acl Safe_ports port 1025-65535 # unregistered ports
21acl Safe_ports port 280 # http-mgmt
22acl Safe_ports port 488 # gss-http
23acl Safe_ports port 591 # filemaker
24acl Safe_ports port 777 # multiling http
25acl CONNECT method CONNECT
26
27#
28# Recommended minimum Access Permission configuration:
29#
30# Deny requests to certain unsafe ports
31http_access deny !Safe_ports
32
33# Deny CONNECT to other than secure SSL ports
34http_access deny CONNECT !SSL_ports
35
36# Only allow cachemgr access from localhost
37http_access allow localhost manager
38http_access deny manager
39
40# We strongly recommend the following be uncommented to protect innocent
41# web applications running on the proxy server who think the only
42# one who can access services on "localhost" is a local user
43#http_access deny to_localhost
44
45#
46# INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS
47#
48
49# Example rule allowing access from your local networks.
50# Adapt localnet in the ACL section to list your (internal) IP networks
51# from where browsing should be allowed
52http_access allow localnet
53http_access allow localhost
54
55# And finally deny all other access to this proxy
56http_access deny all
57
58# Squid normally listens to port 3128
59http_port 3128
60
61# Uncomment and adjust the following to add a disk cache directory.
62cache_dir ufs /var/cache/squid 10000 16 256
63maximum_object_size 5120 MB
64
65# Leave coredumps in the first cache dir
66coredump_dir /var/cache/squid
67
68#
69# Add any of your own refresh_pattern entries above these.
70#
71refresh_pattern ^ftp: 1440 20% 10080
72refresh_pattern ^gopher: 1440 0% 1440
73refresh_pattern -i (/cgi-bin/|\?) 0 0% 0
74refresh_pattern . 0 20% 4320
75
76refresh_pattern -i appldnld\.apple\.com 129600 100% 129600 ignore-reload ignore-no-store override-expire override-lastmod ignore-must-revalidate
77
78refresh_pattern -i phobos\.apple\.com 129600 100% 129600 ignore-reload ignore-no-store override-expire override-lastmod ignore-must-revalidate
Language js

When I first tried to start squid with this config squid crashed on launch with an error about the cache not having the right folders in it. Running D:\Squid\bin\squid.exe -z fixed this.

I then used the same PAC file as before modified to point at this proxy server which I hosted on IIS and then pointed all the iPads too.

Its working the same as the other install as at the end of the day it is the same proxy server program just different OS.

My original article has more about what we are actually doing with this config.

Adam Laycock

Adam Laycock

IT Engineer, Developer & Blogger

All content is my own unless otherwise stated.

My content is licensed under the CC-BY-NC-SA 4.0 license