divert(-1)
dnl === Load allowed networks from environment ===
define(`ALLOWED_NETWORKS', `esyscmd(`echo $ALLOWED_NETWORKS')')dnl

dnl === Split into tokens ===
define(`_firstword', `substr(`$1', `0', index(`$1 ', ` '))')dnl
define(`_restwords', `substr(`$1', incr(index(`$1 ', ` ')))')dnl

dnl === Recursive loop ===
define(`_foreach', `
ifelse(`$1', `', `', `
Allow $1
_foreach(_firstword(_restwords($2)), _restwords($2))')')dnl
define(`foreach', `_foreach(_firstword($1), $1)')dnl
divert


Port 3128
Listen 0.0.0.0

User nobody
Group nobody

LogLevel Info

foreach(ALLOWED_NETWORKS)

ConnectPort 443
Timeout 600