Die Weiterleitung der Ports 5004 und 5060 zeigt der Auszug aus einer fli4l Konfiguration:

#-------------------------------------------------------------------------
# Ether networks used with IP protocol:
#-------------------------------------------------------------------------
IP_ETH_N='1'                   # number of ip ethernet networks, usually 1
IP_ETH_1_NAME=''               # optional: other device name than ethX
IP_ETH_1_IPADDR='10.0.0.1'     # IP address of your n'th ethernet card
IP_ETH_1_NETWORK='10.0.0.0'    # network of your LAN
IP_ETH_1_NETMASK='255.255.255.0' # netmask of your LAN

#-------------------------------------------------------------------------
# Masquerading:
#-------------------------------------------------------------------------
MASQ_NETWORK='10.0.0.0/24'     # networks to masquerade (e.g. our LAN)
MASQ_MODULE_N='1'              # load n masq modules (default: only ftp)
MASQ_MODULE_1='ftp'            # ftp

#-------------------------------------------------------------------------
# Optional package: PORTFW
#
# If you set OPT_PORTFW='yes', you can also edit opt/etc/portfw.sh
#-------------------------------------------------------------------------
OPT_PORTFW='yes'               # install port forwarding tools/modules
PORTFW_N='5'                   # how many portforwardings to set up
PORTFW_1='22 10.0.0.22 tcp'    # wir nutzen einen sshd
PORTFW_2='80 10.0.0.22 tcp'    # und einen Webserver
PORTFW_3='5004 10.0.0.22 udp'  # linphone RTP, siehe linphone Preferences
PORTFW_4='5060 10.0.0.22 udp'  # das ist fuer SIP
PORTFW_5='6000 10.0.0.22 tcp'  # das ist nur X11