Für die SuSE Linux Firewall2 ist aber nix dabei. Vielen Dank im vorraus und danke für die erste Antwort.
Hier meine derzeitigen Einstellungen. WinXP Rechner hat die IP 192.168.0.3
Was habe ich noch verkehrt gemacht?
# 1.)
# Should the Firewall run in quickmode?
#
# Choice: "yes" or "no", if not set defaults to "no"
#
FW_QUICKMODE="yes"
## Type: string
# 2.)
#
FW_DEV_EXT="ppp0"
## Type: string
#
# 3.)
# Which is the interface that points to the internal network?
#
FW_DEV_INT="eth1"
## Type: string
#
# 4.)
#
FW_DEV_DMZ=""
## Type: yesno
## Default: no
#
# 5.)
#
FW_ROUTE="yes"
## Type: yesno
## Default: no
#
# 6.)
#
FW_MASQUERADE="no"
## Type: string
# e.g. "ippp0" or "$FW_DEV_EXT"
FW_MASQ_DEV="$FW_DEV_EXT"
## Type: string
#
FW_MASQ_NETS="0/0"
## Type: yesno
## Default: yes
# 7.)
# "yes" is a good choice
FW_PROTECT_FROM_INTERNAL="no"
## Type: yesno
## Default: yes
#
# 8.)
#
FW_AUTOPROTECT_SERVICES="no"
## Type: string
#
# 9.)
#
# Common: smtp domain
FW_SERVICES_EXT_TCP="4665:4665 5801 5901 4669 4670 4242 http https pop3 pop3s smtp"
## Type: string
# Common: domain
FW_SERVICES_EXT_UDP="4665 4672 4679 4246 10332"
# Common: domain
## Type: string
# For VPN/Routing which END at the firewall!!
FW_SERVICES_EXT_IP=""
## Type: string
#
# Common: smtp domain
FW_SERVICES_DMZ_TCP=""
## Type: string
# Common: domain
FW_SERVICES_DMZ_UDP=""
## Type: string
# For VPN/Routing which END at the firewall!!
FW_SERVICES_DMZ_IP=""
## Type: string
#
# Common: ssh smtp domain
FW_SERVICES_INT_TCP=""
## Type: string
# Common: domain syslog
FW_SERVICES_INT_UDP=""
# For VPN/Routing which END at the firewall!!
FW_SERVICES_INT_IP=""
## Type: string
# 9a.)
# (Common: ssh smtp)
FW_SERVICES_QUICK_TCP=""
## Type: string
# QUICKMODE: UDP services open to external networks (InterNet)
# (Common: isakmp)
FW_SERVICES_QUICK_UDP=""
## Type: string
# QUICKMODE: IP protocols unconditionally open to external networks (InterNet)
# (For VPN firewall that is VPN gateway: 50)
FW_SERVICES_QUICK_IP=""
## Type: string
#
# 10.)
#
FW_TRUSTED_NETS=""
## Type: string
#
# 11.)
# Common: "ftp-data", better is "yes" to be sure that everything else works
FW_ALLOW_INCOMING_HIGHPORTS_TCP="DNS"
## Type: string
# Common: "DNS" or "domain ntp", better is "yes" to be sure ...
FW_ALLOW_INCOMING_HIGHPORTS_UDP="DNS"
## Type: yesno
## Default: yes
# 12.)
#
FW_SERVICE_AUTODETECT="yes"
# Autodetect the services below when starting
## Type: yesno
## Default: no
# Also FW_ALLOW_INCOMING_HIGHPORTS_UDP needs to be "yes"
FW_SERVICE_DNS="no"
## Type: yesno
## Default: no
# if you use dhclient to get an ip address you have to set this to "yes" !
FW_SERVICE_DHCLIENT="no"
## Type: yesno
## Default: no
# set to "yes" if this server is a DHCP server
FW_SERVICE_DHCPD="no"
## Type: yesno
# tcp port 3128 to allow remote access to the squid proxy service.
FW_SERVICE_SQUID="no"
## Type: yesno
## Default: no
# set to "yes" if this server is running a samba server. You still have to
# open the tcp port 139 to allow remote access to SAMBA.
FW_SERVICE_SAMBA="no"
## Type: string
#
# 13.)
#
FW_FORWARD=""
# Beware to use this!
## Type: string
#
# 14.)
# Hint: if FW_DEV_MASQ is set to the external interface you have to set
FW_FORWARD_MASQ="0/0,192.168.0.3,tcp,4670 192.168.0.3,udp,10332"
# Beware to use this!
## Type: string
#
# 15.)
#
FW_REDIRECT=""