Ребята большая просьба о помощи.
Имеем FreeBsd 6.2 2 сетевухи, одна к провайдеру другая в локалку.
Задача сделать шлюз с нат, и выпускать через него пользователей локальной сети в инет + поставить фаервол, дабы из внешней сети не повадно было делать все что хочешь.
Дописал в конфиге ядра
options DUMMYNET
options TCP_DROP_SYNFIN
options SC_DISABLE_REBOOT
options IPFIREWALL
options IPFIREWALL_VERBOSE
options IPFIREWALL_VERBOSE_LIMIT=100
options IPFIREWALL_FORWARD
options IPDIVERT
options BRIDGE
и скомпилил с новыми параметрами. Здесь все ок.
в rc.conf дописал:
firewall_enable="YES"
firewall_script="/etc/rc.firewall"
firewall_type="open"
firewall_quiet="YES"
firewall_logging="YES"
natd_enable="YES"
natd_interface="xl1"
natd_flags=""
tcp_drop_synfin="YES"
clear_tmp_enable="YES"
inetd_enable="NO"
если выбираю правило open, то инет работает у всех и все ок. У клиентов ip адреса раздаются по dhcp, также dhcp прописывает днс локального доменного сервака и шлюз к вряхе.
если выбираю правило simple в скрипте rc.firewall, то инет перестает работать.
[Ss][Ii][Mm][Pp][Ll][Ee])
############
# This is a prototype setup for a simple firewall. Configure this
# machine as a DNS and NTP server, and point all the machines
# on the inside at this machine for those services.
############
# set these to your outside interface network and netmask and ip
oif="xl1"
onet="10.28.2.0"
omask="255.255.255.0"
oip="10.28.2.126"
# set these to your inside interface network and netmask and ip
iif="xl0"
inet="192.168.10.0"
imask="255.255.255.0"
iip="192.168.10.250"
setup_loopback
# Stop spoofing
${fwcmd} add deny all from ${inet}:${imask} to any in via ${oif}
${fwcmd} add deny all from ${onet}:${omask} to any in via ${iif}
# Stop RFC1918 nets on the outside interface
#${fwcmd} add deny all from any to 10.0.0.0/8 via ${oif}
${fwcmd} add deny all from any to 172.16.0.0/12 via ${oif}
${fwcmd} add deny all from any to 192.168.0.0/16 via ${oif}
# Stop draft-manning-dsua-03.txt (1 May 2000) nets (includes RESERVED-1,
# DHCP auto-configuration, NET-TEST, MULTICAST (class D), and class E)
# on the outside interface
${fwcmd} add deny all from any to 0.0.0.0/8 via ${oif}
${fwcmd} add deny all from any to 169.254.0.0/16 via ${oif}
${fwcmd} add deny all from any to 192.0.2.0/24 via ${oif}
${fwcmd} add deny all from any to 224.0.0.0/4 via ${oif}
${fwcmd} add deny all from any to 240.0.0.0/4 via ${oif}
# Network Address Translation. This rule is placed here deliberately
# so that it does not interfere with the surrounding address-checking
# rules. If for example one of your internal LAN machines had its IP
# address set to 192.0.2.1 then an incoming packet for it after being
# translated by natd(8) would match the `deny' rule above. Similarly
# an outgoing packet originated from it before being translated would
# match the `deny' rule below.
case ${natd_enable} in
[Yy][Ee][Ss])
if [ -n "${natd_interface}" ]; then
${fwcmd} add divert natd all from any to any via ${natd_interface}
fi
;;
esac
# Stop RFC1918 nets on the outside interface
#${fwcmd} add deny all from 10.0.0.0/8 to any via ${oif}
${fwcmd} add deny all from 172.16.0.0/12 to any via ${oif}
${fwcmd} add deny all from 192.168.0.0/16 to any via ${oif}
# Stop draft-manning-dsua-03.txt (1 May 2000) nets (includes RESERVED-1,
# DHCP auto-configuration, NET-TEST, MULTICAST (class D), and class E)
# on the outside interface
${fwcmd} add deny all from 0.0.0.0/8 to any via ${oif}
${fwcmd} add deny all from 169.254.0.0/16 to any via ${oif}
${fwcmd} add deny all from 192.0.2.0/24 to any via ${oif}
${fwcmd} add deny all from 224.0.0.0/4 to any via ${oif}
${fwcmd} add deny all from 240.0.0.0/4 to any via ${oif}
# Allow TCP through if setup succeeded
${fwcmd} add pass tcp from any to any established
# Allow IP fragments to pass through
${fwcmd} add pass all from any to any frag
# Allow setup of incoming email
${fwcmd} add pass tcp from any to ${oip} 25 setup
# Allow setup of SSH
${fwcmd} add pass tcp from any to ${oip} 22 setup
${fwcmd} add pass tcp from any to ${iip} 22 setup
# Allow access to our DNS
${fwcmd} add pass tcp from any to ${oip} 53 setup
${fwcmd} add pass udp from any to ${oip} 53
${fwcmd} add pass udp from ${oip} 53 to any
# Allow access to our WWW
${fwcmd} add pass tcp from any to ${oip} 80 setup
${fwcmd} add pass tcp from any to ${iip} 80 setup
# Reject&Log all setup of incoming connections from the outside
${fwcmd} add deny log tcp from any to any in via ${oif} setup
# Allow setup of any other TCP connection
${fwcmd} add pass tcp from any to any setup
# Allow DNS queries out in the world
${fwcmd} add pass udp from ${oip} to any 53 keep-state
# Allow NTP queries out in the world
${fwcmd} add pass udp from ${oip} to any 123 keep-state
${fwcmd} add pass icmp from any to any icmptypes 0,8,11
# Everything else is denied by default, unless the
# IPFIREWALL_DEFAULT_TO_ACCEPT option is set in your kernel
# config file.
;;
Что можно сделать? Только пожалуйста подробно. Что добавить, а что удалить в правилах. Заранее спасибо
Имеем FreeBsd 6.2 2 сетевухи, одна к провайдеру другая в локалку.
Задача сделать шлюз с нат, и выпускать через него пользователей локальной сети в инет + поставить фаервол, дабы из внешней сети не повадно было делать все что хочешь.
Дописал в конфиге ядра
options DUMMYNET
options TCP_DROP_SYNFIN
options SC_DISABLE_REBOOT
options IPFIREWALL
options IPFIREWALL_VERBOSE
options IPFIREWALL_VERBOSE_LIMIT=100
options IPFIREWALL_FORWARD
options IPDIVERT
options BRIDGE
и скомпилил с новыми параметрами. Здесь все ок.
в rc.conf дописал:
firewall_enable="YES"
firewall_script="/etc/rc.firewall"
firewall_type="open"
firewall_quiet="YES"
firewall_logging="YES"
natd_enable="YES"
natd_interface="xl1"
natd_flags=""
tcp_drop_synfin="YES"
clear_tmp_enable="YES"
inetd_enable="NO"
если выбираю правило open, то инет работает у всех и все ок. У клиентов ip адреса раздаются по dhcp, также dhcp прописывает днс локального доменного сервака и шлюз к вряхе.
если выбираю правило simple в скрипте rc.firewall, то инет перестает работать.
[Ss][Ii][Mm][Pp][Ll][Ee])
############
# This is a prototype setup for a simple firewall. Configure this
# machine as a DNS and NTP server, and point all the machines
# on the inside at this machine for those services.
############
# set these to your outside interface network and netmask and ip
oif="xl1"
onet="10.28.2.0"
omask="255.255.255.0"
oip="10.28.2.126"
# set these to your inside interface network and netmask and ip
iif="xl0"
inet="192.168.10.0"
imask="255.255.255.0"
iip="192.168.10.250"
setup_loopback
# Stop spoofing
${fwcmd} add deny all from ${inet}:${imask} to any in via ${oif}
${fwcmd} add deny all from ${onet}:${omask} to any in via ${iif}
# Stop RFC1918 nets on the outside interface
#${fwcmd} add deny all from any to 10.0.0.0/8 via ${oif}
${fwcmd} add deny all from any to 172.16.0.0/12 via ${oif}
${fwcmd} add deny all from any to 192.168.0.0/16 via ${oif}
# Stop draft-manning-dsua-03.txt (1 May 2000) nets (includes RESERVED-1,
# DHCP auto-configuration, NET-TEST, MULTICAST (class D), and class E)
# on the outside interface
${fwcmd} add deny all from any to 0.0.0.0/8 via ${oif}
${fwcmd} add deny all from any to 169.254.0.0/16 via ${oif}
${fwcmd} add deny all from any to 192.0.2.0/24 via ${oif}
${fwcmd} add deny all from any to 224.0.0.0/4 via ${oif}
${fwcmd} add deny all from any to 240.0.0.0/4 via ${oif}
# Network Address Translation. This rule is placed here deliberately
# so that it does not interfere with the surrounding address-checking
# rules. If for example one of your internal LAN machines had its IP
# address set to 192.0.2.1 then an incoming packet for it after being
# translated by natd(8) would match the `deny' rule above. Similarly
# an outgoing packet originated from it before being translated would
# match the `deny' rule below.
case ${natd_enable} in
[Yy][Ee][Ss])
if [ -n "${natd_interface}" ]; then
${fwcmd} add divert natd all from any to any via ${natd_interface}
fi
;;
esac
# Stop RFC1918 nets on the outside interface
#${fwcmd} add deny all from 10.0.0.0/8 to any via ${oif}
${fwcmd} add deny all from 172.16.0.0/12 to any via ${oif}
${fwcmd} add deny all from 192.168.0.0/16 to any via ${oif}
# Stop draft-manning-dsua-03.txt (1 May 2000) nets (includes RESERVED-1,
# DHCP auto-configuration, NET-TEST, MULTICAST (class D), and class E)
# on the outside interface
${fwcmd} add deny all from 0.0.0.0/8 to any via ${oif}
${fwcmd} add deny all from 169.254.0.0/16 to any via ${oif}
${fwcmd} add deny all from 192.0.2.0/24 to any via ${oif}
${fwcmd} add deny all from 224.0.0.0/4 to any via ${oif}
${fwcmd} add deny all from 240.0.0.0/4 to any via ${oif}
# Allow TCP through if setup succeeded
${fwcmd} add pass tcp from any to any established
# Allow IP fragments to pass through
${fwcmd} add pass all from any to any frag
# Allow setup of incoming email
${fwcmd} add pass tcp from any to ${oip} 25 setup
# Allow setup of SSH
${fwcmd} add pass tcp from any to ${oip} 22 setup
${fwcmd} add pass tcp from any to ${iip} 22 setup
# Allow access to our DNS
${fwcmd} add pass tcp from any to ${oip} 53 setup
${fwcmd} add pass udp from any to ${oip} 53
${fwcmd} add pass udp from ${oip} 53 to any
# Allow access to our WWW
${fwcmd} add pass tcp from any to ${oip} 80 setup
${fwcmd} add pass tcp from any to ${iip} 80 setup
# Reject&Log all setup of incoming connections from the outside
${fwcmd} add deny log tcp from any to any in via ${oif} setup
# Allow setup of any other TCP connection
${fwcmd} add pass tcp from any to any setup
# Allow DNS queries out in the world
${fwcmd} add pass udp from ${oip} to any 53 keep-state
# Allow NTP queries out in the world
${fwcmd} add pass udp from ${oip} to any 123 keep-state
${fwcmd} add pass icmp from any to any icmptypes 0,8,11
# Everything else is denied by default, unless the
# IPFIREWALL_DEFAULT_TO_ACCEPT option is set in your kernel
# config file.
;;
Что можно сделать? Только пожалуйста подробно. Что добавить, а что удалить в правилах. Заранее спасибо
