[SOLVED] guest emails sent by host IP address

A

Ashian

Active Member
Sep 24, 2017
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Hello,
I have a server on Hetzner datacenter and config one server using Proxmox 5. ( debian ) I define a vmbr network adapter on host machine, and create a windows guest, using a dedicated IP address ( Bridge mode )
All work fine.
but today I notice that in header of emails sent by email server I have on guest machine , IP address of host machine set as Sender IP.
I can't understand why, Would you please help me to how can I investigate and fine the misconfiguration?

Best regards
Mehdi
 
please post more informations....
/etc/network/interfaces
routing table
iptables rules.
IP Forwarding active?
Short howto....
setup your Host like this
Code: 
auto lo
iface lo inet loopback

iface lo inet6 loopback

auto eno1
iface eno1 inet static
    address  Public-Host-IP
    netmask  your-netmask
    gateway  your-gw
    pointopoint your-gw
    up route add -net IPv4-Host-IP netmask your-netmask gw your-gw dev eno1
    post-up iptables-restore < /etc/iptables.up.rules

iface eno1 inet6 static
    address  IPv6-Host-IP::2
    netmask  64
    gateway  fe80::1

auto vmbr0
iface vmbr0 inet static
    address  IPv4-Host-IP
    netmask  255.255.255.0
    bridge_ports none
    bridge_stp off
    bridge_fd 0
    up ip route add 2nd-IPv4-Public-IP/32 dev vmbr0

iface vmbr0 inet6 static
    address  IPv6-Host-IP::2
    netmask  64
    pre-up /sbin/modprobe -q ipv6 ; /bin/true
    up ip -6 route add IPv6-Host-IP::2/64 dev eth0
    up ip -6 route add IPv6-subnet::/64 dev vmbr0

In your windows VM use the vmbr0 and setup a static IP with your second public IP inside the windows os.

If you dont have a second public IP and use a private ip, so its all correctly cause the thats a masquerading to your public IP ...
 
Thank you for your reply.
I setup proxmox base on how to I find here ( wiki.hetzner.de/index.php/Proxmox_VE/en#Network_configuration_KVM.2FBridged)
I try to send details you asked and during this checking I find the problem. I added a second network adapter which is setup as NAT to windows guest. and because of this mistake windows os also has host IP.
by removing second network adapter the problem solved.
 
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