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services: Add '%facebook-host-aliases'. 

* gnu/services/networking.scm (%facebook-host-aliases): New variable.
* doc/guix.texi (Networking Services): Document it.
master
Ludovic Courtès 2014-10-07 21:33:12 +02:00
parent 568841d491
commit fa0c1d6104
2 changed files with 65 additions and 1 deletions
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29
doc/guix.texi
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@ -3610,6 +3610,35 @@ root.
The other options should be self-descriptive.
@end deffn
@defvr {Scheme Variable} %facebook-host-aliases
This variable contains a string for use in @file{/etc/hosts}
(@pxref{Host Names,,, libc, The GNU C Library Reference Manual}). Each
line contains a entry that maps a known server name of the Facebook
on-line service---e.g., @code{www.facebook.com}---to the local
host---@code{127.0.0.1} or its IPv6 equivalent, @code{::1}.
This variable is typically used in the @code{hosts-file} field of an
@code{operating-system} declaration (@pxref{Using the Configuration
System}):
@example
(use-modules (gnu) (guix))
(operating-system
(host-name "mymachine")
;; ...
(hosts-file
;; Create a /etc/hosts file with aliases for "localhost"
;; and "mymachine", as well as for Facebook servers.
(text-file "hosts"
(string-append (local-host-aliases host-name)
%facebook-host-aliases))))
@end example
This mechanism can prevent programs running locally, such as Web
browsers, from accessing Facebook.
@end defvr
@node X Window
@subsubsection X Window

37
gnu/services/networking.scm
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@ -25,7 +25,8 @@
#:use-module (gnu packages messaging)
#:use-module (guix gexp)
#:use-module (guix monads)
#:export (static-networking-service
#:export (%facebook-host-aliases
static-networking-service
dhcp-client-service
tor-service
bitlbee-service))
@ -36,6 +37,40 @@
;;;
;;; Code:
(define %facebook-host-aliases
;; This is the list of known Facebook hosts to be added to /etc/hosts if you
;; are to block it.
"\
# Block Facebook IPv4.
127.0.0.1 www.facebook.com
127.0.0.1 facebook.com
127.0.0.1 login.facebook.com
127.0.0.1 www.login.facebook.com
127.0.0.1 fbcdn.net
127.0.0.1 www.fbcdn.net
127.0.0.1 fbcdn.com
127.0.0.1 www.fbcdn.com
127.0.0.1 static.ak.fbcdn.net
127.0.0.1 static.ak.connect.facebook.com
127.0.0.1 connect.facebook.net
127.0.0.1 www.connect.facebook.net
127.0.0.1 apps.facebook.com
# Block Facebook IPv6.
fe80::1%lo0 facebook.com
fe80::1%lo0 login.facebook.com
fe80::1%lo0 www.login.facebook.com
fe80::1%lo0 fbcdn.net
fe80::1%lo0 www.fbcdn.net
fe80::1%lo0 fbcdn.com
fe80::1%lo0 www.fbcdn.com
fe80::1%lo0 static.ak.fbcdn.net
fe80::1%lo0 static.ak.connect.facebook.com
fe80::1%lo0 connect.facebook.net
fe80::1%lo0 www.connect.facebook.net
fe80::1%lo0 apps.facebook.com\n")
(define* (static-networking-service interface ip
#:key
gateway