Merhabalar,
pass in quick log on $int_if proto tcp from $lan_net to any port {
22,25,80,110,8080,12200,443,444,53 } flags S/SA keep state
kuralinda ic agdan gelen smtp, pop vs isteklerin tum her yere gitmesine
izin vermissiniz. Kuralinizi
pass in quick log on $int_if proto tcp from $lan_net to*
$FIREWALL_IC_IP_ADRESI p*ort { 22,25,80,110,8080,12200,443,444,53 }
flags S/SA keep state
seklinde degistirirseniz kullanicilariniz sadece ic mail sunucu ile
haberlesebilir.
vys yazmış:
Merhabalar,
pf kurallarımda herşeyi blockladıktan sonra localden firewall 25,110
portlarına izin verdim. şimdi burda yapmak istediğim firewall makinem
ve mail sunucum aynı makine içerideki kullanıcılarımın sadece
içerideki mail sunucumla haberleşmesini sağlıyorum firewall
kurallarında mail sunucumun dışarı çıkmasına izin vermeme rağmen
içerideki kullanıcılarda dışarıdaki bir mail sunucuyla bağlantı
kurabiliryor landaki kullanıcılarımın 25 ve 110 portları dışarıyla
bağlantısını nasıl engelleyebilirim. ben kuralların en başında herşeyi
blocklayıp sonra iç ağdan fw ye 25 ve 110 portlarını açmama rağmen
neden dışarıya çıkar. kurallarda yapmış olduğum hatayı
bulamıyorum.yardımcı olacak arkadaşlara şimdi den teşeker ederim.
###################################################
# Macros
###################################################
lan_net = "{ 10.0.0.0/24, 10.0.2.0/24, 10.0.3.0/24, 10.0.4.0/24 }"
int_if = "bge0"
ext_if = "vr0"
ext_if2 = "vr1"
ext_gw1 = "192.168.100.213"
ext_gw2 = "192.168.110.25"
fwips = "{127.0.0.1, 10.0.0.2, 192.168.100.212, 192.168.110.26}"
##################################################
#Nat Kurallari
##################################################
nat on $ext_if from $lan_net to any -> ($ext_if)
nat on $ext_if2 from $lan_net to any -> ($ext_if2)
nat on $ext_if proto tcp from self to any port smtp tag IF2 -> ($ext_if2)
nat on $ext_if proto tcp from self to any port pop3 tag IF2 -> ($ext_if2)
rdr on $int_if proto tcp from any to any port 80 -> 10.0.0.2 port 8080
##################################################
#Kurallar
##################################################
block in log-all all
block out log-all all
pass in quick on lo0 all
pass out quick on lo0 all
##################################################
#Lan_net ten Firewalla izin verilen Portlar
##################################################
pass in quick log on $int_if proto tcp from $lan_net to any port {
22,25,80,110,8080,12200,443,444,53 } flags S/SA keep state
##################################################
# Firewalla izin veriliyor <E7><FD>k<FD><FE>lar
##################################################
pass out quick on $ext_if route-to ($ext_if2 $ext_gw2) tagged IF2 keep
state
pass out quick log on $ext_if proto {tcp,udp} from $fwips to any keep
state
pass out quick log on $ext_if2 proto {tcp,udp} from $fwips to any
keep state
FreeBSD 6 kitabi: http://www.acikakademi.com/catalog/freebsd6
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