Transparent IP Address ?

Q

qheart

New Member
Apr 29, 2014
2
0
1
Hello,

I need help to configure transparent IP address

Here, My Proxmox 3.4 Network Configuration :
# For Local IP Address
auto vmbr0
iface vmbr0 inet static
address 10.10.1.6
netmask 255.255.255.0
bridge_ports eth0
bridge_stp off
bridge_fd 0

# For Public IP Address
auto vmbr1
iface vmbr1 inet static
address X.x.x.x
netmask 255.255.255.248
gateway x.x.x.x
bridge_ports eth1
bridge_stp off
bridge_fd 0​

Here My KVM Linux network configuration
iface eth0 inet static
address 10.10.1.23
netmask 255.255.255.0
network 10.10.1.0
broadcast 10.10.1.255
gateway 10.10.1.1​

In Proxmox Box, i configured port forwarding to redirect port 80 IP Public x.x.x.x to 10.10.1.23
iptables -t nat -A PREROUTING -p tcp -i vmbr1 -m tcp -d x.x.x.x --dport 80 -j DNAT --to-destination 10.10.1.23:80
iptables -t nat -A POSTROUTING -o vmbr0 -j MASQUERADE

It's work,
===== but in KVM Linux
root@server:~# netstat -ntu
Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 10.10.1.23:80 10.10.1.6:51985 ESTABLISHED
tcp 0 0 10.10.1.23:80 10.10.1.6:53212 ESTABLISHED
tcp 0 0 10.10.1.23:80 10.10.1.6:51238 ESTABLISHED
tcp 0 0 10.10.1.23:80 10.10.1.6:51782 ESTABLISHED

I would like detect public IP in Foreign Address, how to configure transparent port ip and port forwarding in proxmox host ?
 
qheart said:
In Proxmox Box, i configured port forwarding to redirect port 80 IP Public x.x.x.x to 10.10.1.23
iptables -t nat -A PREROUTING -p tcp -i vmbr1 -m tcp -d x.x.x.x --dport 80 -j DNAT --to-destination 10.10.1.23:80
iptables -t nat -A POSTROUTING -o vmbr0 -j MASQUERADE

It's work,
===== but in KVM Linux
root@server:~# netstat -ntu
Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 10.10.1.23:80 10.10.1.6:51985 ESTABLISHED
tcp 0 0 10.10.1.23:80 10.10.1.6:53212 ESTABLISHED
tcp 0 0 10.10.1.23:80 10.10.1.6:51238 ESTABLISHED
tcp 0 0 10.10.1.23:80 10.10.1.6:51782 ESTABLISHED

I would like detect public IP in Foreign Address, how to configure transparent port ip and port forwarding in proxmox host ?
Click to expand...

Instead of

iptables -t nat -A POSTROUTING -o vmbr0 -j MASQUERADE

run


iptables -t nat -A POSTROUTING -s 10.0.1.23 -p tcp ! -d 10.0.1.0/24 --sport 80 -j SNAT --to-source x.x.x.x
 
Thanks for the information.

qheart said:
Hello,

I need help to configure transparent IP address

Here, My Proxmox 3.4 Network Configuration :
# For Local IP Address
auto vmbr0
iface vmbr0 inet static
address 10.10.1.6
netmask 255.255.255.0
bridge_ports eth0
bridge_stp off
bridge_fd 0

# For Public IP Address
auto vmbr1
iface vmbr1 inet static
address X.x.x.x
netmask 255.255.255.248
gateway x.x.x.x
bridge_ports eth1
bridge_stp off
bridge_fd 0​

Here My KVM Linux network configuration
iface eth0 inet static
address 10.10.1.23
netmask 255.255.255.0
network 10.10.1.0
broadcast 10.10.1.255
gateway 10.10.1.1​

In Proxmox Box, i configured port forwarding to redirect port 80 IP Public x.x.x.x to 10.10.1.23
iptables -t nat -A PREROUTING -p tcp -i vmbr1 -m tcp -d x.x.x.x --dport 80 -j DNAT --to-destination 10.10.1.23:80
iptables -t nat -A POSTROUTING -o vmbr0 -j MASQUERADE

It's work,
===== but in KVM Linux
root@server:~# netstat -ntu
Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 10.10.1.23:80 10.10.1.6:51985 ESTABLISHED
tcp 0 0 10.10.1.23:80 10.10.1.6:53212 ESTABLISHED
tcp 0 0 10.10.1.23:80 10.10.1.6:51238 ESTABLISHED
tcp 0 0 10.10.1.23:80 10.10.1.6:51782 ESTABLISHED

I would like detect public IP in Foreign Address, how to configure transparent port ip and port forwarding in proxmox host ?
Click to expand...
 
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