# PF configuration for Central de Vendas Informatica LTDA.
# admin@centralinf.com.br

### macros ###
ext_if_ip = "201.12.35.51"
ext_if = "re0"
int_if = "xl0"

int_odin = "192.168.1.134"
ext_odin = "201.12.35.52"

int_saint = "192.168.1.53"
ext_saint = "201.12.35.54"
range_saint = "200.230.207.0/24"

table <ti> { 192.168.1.120, 192.168.1.121, 192.168.1.122, 192.168.1.123 }

### options ###
set loginterface $ext_if
set skip on lo

### scrub ###
scrub all no-df fragment reassemble random-id

### nat ###

# nat for all network.
nat on $ext_if from $int_if:network to any -> $ext_if:0
nat-anchor "ftp-proxy/*"

# binat for odin.
binat on $ext_if from $int_odin to any -> $ext_odin

# binat for saint.
binat on $ext_if from $int_saint to $range_saint -> $ext_saint

### redirects ###

# ftp-proxy.
rdr-anchor "ftp-proxy/*"
rdr pass on $int_if proto tcp to port ftp -> 127.0.0.1 port 8021

# transparent proxy.
rdr on $int_if proto tcp from any to any port http -> 127.0.0.1 port 3128

### filter rules ###

# block everything.
block log all

# antispoof and ftp-proxy anchor.
antispoof for $int_if inet
anchor "ftp-proxy/*"

# allow all traffic on $int_if.
pass quick on $int_if

# block msn.
block inet proto tcp from any to any port 1863

# allow msn to priv_users ;).
pass out on $ext_if inet proto tcp from <ti> to any \
        port 1863 modulate state flags S/SA

# allow ping.
pass in quick inet proto icmp all icmp-type echoreq keep state

# allow vpn (pptp) and tun interfaces.
pass in quick on $ext_if inet proto tcp from any to $ext_if_ip \
        port pptp modulate state flags S/SA
pass in quick on $ext_if inet proto gre from any to $ext_if_ip \
        keep state
pass quick on tun

# allow dns.
pass in quick on $ext_if inet proto udp from any to $ext_if_ip \
        port domain keep state

# allow ftp and http to odin.
pass in quick on $ext_if inet proto tcp from any to $int_odin \
        port { ftp, ftp-data } modulate state flags S/SA
pass in quick on $ext_if inet proto tcp from any to $int_odin \
        port http modulate state flags S/SA
pass in quick on $ext_if inet proto tcp from any to $int_odin port > 49151 \
        modulate state flags S/SA

# allow all tcp, udp and icmp pass out.
pass out quick on $ext_if inet proto tcp all modulate state flags S/SA
pass out quick on $ext_if inet proto { udp, icmp } all keep state