HZe I use a Windows notebook at work and at home. At work, there is Internet access through a proxy server while at home I can access Internet directly without proxy through a DSL router.
DHCP works fine to get the IP-addresses without reconfiguration, but every time I switched the networks I had to enable/disable the proxy settings.
I would assume, that a proxy server is a configuration, that depends on the network, like e.g. the DNS configuration or how to set the IP address. However, I did not find a way to include the proxy setting depending on the network environment on Windows.
So I came up with this little script, which does the same based on the current network connection. I added it to my windows AutoStart group and now I'm fine.
HZe - 11-OCT-2004: now it also supports Mozilla Firefox
HZe - 18-DEC-2005: now also supports a silent mode and optionally a start of a command after the proxy setting was done. On my Windows machine I use this as short cut to start FireFox:
proxyswitch.tcl -silent 1 -exec "c:\Programme\Mozilla Firefox\firefox.exe" "DNS-Suffix:[ \t]*atwork.com" "proxyhost:3128"
So, every time I start FireFox using this short cut, it checks in which network the machine is connected and sets the proxy accordingly.
HZe - 09-MAR-2008: I've added some features:
HZe - 26-MAR-2010: to use the tool without having Tcl/Tk installed, here's a ready-to-use executable for Windows: [L1 ]
HZe - 13-NOV-2010: updated the script to also deal with Google Chrome. Chrome is using the Proxy settings from Windows Internet Explorer, however it was not enough to just do the settings that work for Internet Explorer. So, in case of Chrome I also add a command line switch to set the proxy for Chrome.
# Switch to enable/disable Proxy depending on Company net or HOME net
# Tested on Windows XP
proc usage {} {
wm protocol . WM_DELETE_WINDOW exit
frame .f
text .f.info -yscrollcommand [list .f.sb set] -width 80 -height 15
scrollbar .f.sb -orient vert -command [list .f.info yview]
button .b -text " OK " -command {set ::continue 1}
pack .f.sb -side right -fill y
pack .f.info -side right -fill both -expand 1
pack .f -fill both -expand 1 -padx 5 -pady 5
pack .b -pady 5
.f.info insert end {ProxySwitch
sets the proxy in your Internet Explorer depending the network connection
Author:
Holger Zeinert (holger DOT zeinert AT gmx DOT de)
usage:
tclsh proxyswitch.tcl [-silent 0|1] [-exec <cmd>] <re-expr> <proxyhost:port> ...
proxyswitch.exe [-silent 0|1] [-exec <cmd>] <re-expr> <proxyhost:port> ...
tclsh proxyswitch.tcl <filename-for-args>
proxyswitch.exe <filename-for-args>
Description:
Depending on the output of ipconfig, the setting of the Proxy is changed. This
is done in the registry for Internet Explorer and in the file prefs.js for
Mozilla Firefox
To do so, the output of ipconfig is matched against the regular expressions. The first
fit determines the proxy host and port to be used. Since the whole output of ipconfig
is base for regexp, you can make a decision on IP-Address, DNS suffix or whatever.
If no match fits, the default is to disable the proxy.
-silent 0|1:
if set to 1, there will be no message box used to report the action
-exec <cmd>:
call a command after the setting was made
-startpage <url>:
set the start page for Internet Explorer
If the command line gets too long, alternatively the arguments can be stored
in a file and only the filename has to be passed as single argument:
tclsh proxyswitch.tcl <filename-for-args>
proxyswitch.exe <filename-for-args>
The <filename-for-args> includes the arguments, they can be spread over serveral
lines. However, the arguments have to be a valid tcl list, i.e. it's either
tclsh proxyswitch.tcl -exec "C:\Program Files\my Browser\prog.exe"
or
tclsh proxyswitch.tcl "C:\Documents and Settings\me\config.rc"
C:\Documents and Settings\me\config.rc:
-exec {C:\Program Files\my Browser\prog.exe}
Examples:
tclsh proxyswitch.tcl ":[ \t]*10.2." "gate:3128"
proxyswitch.exe ":[ \t]*192.168." "gate:8888" "DNS-Suffix: home" "world.home.de:3200"
Appendix:
An output of ipconfig looks e.g. like this:
Windows-IP-Konfiguration
Ethernetadapter WLAN-Verbindung :
Verbindungsspezifisches DNS-Suffix: home
IP-Adresse. . . . . . . . . . . . : 192.168.1.2
Subnetzmaske. . . . . . . . . . . : 255.255.255.0
Standardgateway . . . . . . . . . : 192.168.1.1
}
after 500 {
if {[catch {
foreach {xs ys} [split [wm geometry .] x+] {
# lassign simulator
}
wm minsize . $xs $ys
} msg]} {
tk_messageBox -icon error -message $msg
}
}
vwait ::continue
}
package require registry
if {$argv == ""} {
usage
exit
}
if {[llength $argv] == 1} {
# only a configuration file was given with the argv vector
set cfgname [lindex $argv 0]
if {[catch {
set fp [open $cfgname]
set argv [list]
while {![eof $fp]} {
gets $fp line
foreach v $line {
lappend argv $v
}
}
close $fp
} errmsg]} {
tk_messageBox -message "Could not read file $cfgname. \n\n$errmsg\n\nIgnoring file configuration."
}
}
if {[catch {set ipconfig [exec ipconfig]}]} {
tk_messageBox -message "could not start ipconfig! Not running Windows?"
exit
}
set server "off"
set silent 0
set cmd [list]
set startpage ""
foreach {key value} $argv {
# options
switch -- $key {
-silent {
set silent $value
}
-exec {
set cmd [list $value]
}
-startpage {
set startpage $value
}
default {
if {[regexp $key $ipconfig]} {
set server $value
break
}
}
}
}
if {!$silent} {
# show activity
label .info1 -text "Updating Firefox/Internet Explorer Configuration..."
label .info2
button .b -text "Exit" -command exit
pack .info1 .info2 .b -fill x -expand 1
update
}
# depending on proxy, set override proxy for local addresses
if {$server == "off"} {
set server ""
set override ""
set switch 0
} else {
set override <local>
set switch 1
}
#---------------------------------------------------------------------
# Chrome
# it seems to be not sufficient to set the IE Internet settings, while Chrome
# is using them.
# So we will give it another hint...
if { [string match -nocase "*chrome*" $cmd] } {
lappend cmd "--proxy-server=$server"
}
#---------------------------------------------------------------------
# Internet Explorer 6
#
# set the entries in the registry
# ToDo: to also set this value for the 64 bit browser, I have to use RegEnableReflectionKey()
# to make Windows copy the value also to the 64bit version of the Registry
set keyName {HKEY_CURRENT_USER\SOFTWARE\microsoft\windows\currentversion\internet settings}
registry set $keyName "ProxyEnable" $switch dword
registry set $keyName "ProxyServer" $server
catch {
# in case current user is not Admin...
set keyName {HKEY_LOCAL_MACHINE\SOFTWARE\microsoft\windows\currentversion\internet settings}
registry set $keyName "ProxyEnable" $switch dword
registry set $keyName "ProxyServer" $server
}
# set keyName {HKEY_LOCAL_MACHINE\SOFTWARE\Altiris\Communications}
# registry set $keyName "Proxy Server" [lindex [split $server ":"] 0]
# registry set $keyName "Proxy Port" [lindex [split $server ":"] 1] dword
#registry set $keyName "ProxyOverride" $override
if {$startpage != ""} {
set keyName {HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main}
registry set $keyName "Start Page" $startpage
}
if {!$silent} {
if {$switch} {
.info2 configure -text "Proxy set to $server!"
} else {
.info2 configure -text "Proxy disabled!"
}
update
}
#---------------------------------------------------------------------
# FireFox 0.9.3, 1.0PR, ... 3.6
#
set tmp [split $server ":"]
set host [lindex $tmp 0]
set port [lindex $tmp 1]
foreach pref [glob -nocomplain [file join $env(APPDATA) Mozilla Firefox Profiles * prefs.js]] {
set in [open $pref r]
set out [open $pref.tmp w]
while {![eof $in]} {
gets $in line
if {![regexp {user_pref\("network\.proxy\.(http|type).*",.*} $line]} {
puts $out $line
}
}
# TODO: deal with other proxy settings as well.
if {$switch} {
puts $out "user_pref(\"network.proxy.http\", \"$host\");"
puts $out "user_pref(\"network.proxy.http_port\", $port);"
puts $out "user_pref(\"network.proxy.type\", 1);"
}
close $in
close $out
file rename -force $pref.tmp $pref
}
# start a command after the configuration setting
if {$cmd != ""} {
exec {*}$cmd &
}
if {! $silent } {
after 3000 exit
} else {
exit
}