echo 1 > /proc/sys/net/ipv4/ip_forward
iptables -t nat -F
iptables -t nat -A POSTROUTING -s 10.0.1.0/24 -d 0/0 -j MASQUERADE
iptables -t nat -A PREROUTING -i eth1 -p tcp --dport 5432 -j DNAT --to 10.0.1.5:5432
This is that I get
PORT STATE SERVICE
20/tcp filtered ftp-data
22/tcp open ssh
25/tcp filtered smtp
80/tcp open http
135/tcp filtered msrpc
136/tcp filtered profile
137/tcp filtered netbios-ns
138/tcp filtered netbios-dgm
139/tcp filtered netbios-ssn
445/tcp filtered microsoft-ds
593/tcp filtered http-rpc-epmap
1080/tcp filtered socks
1723/tcp open pptp
5432/tcp filtered postgres
\I need the postgres port but I cant coneect to postgres