OPNsense Forum

Archive => 21.7 Legacy Series => Topic started by: Silver77 on October 08, 2021, 12:34:27 am

Title: Configure the virtual ip for a pc
Post by: Silver77 on October 08, 2021, 12:34:27 am

How do i force a pc to go out with a virtual ip?
obviously the ip is part of the range at my disposal.
thanks

Title: Re: Configure the virtual ip for a pc
Post by: juere on October 08, 2021, 01:02:32 am

Let's assume you are using IPv4 and your desired virtual WAN IP is 42.1.2.3/32 and your PC is 192.168.1.1/24.

• First create an IP Alias in Interfaces->Virtual IP's->Settings using WAN as interface and 82.1.2.3/3 as address.
  
• The goto Firewall->NAT->Outbound and switch to Hybrid or Manual Mode whatever suits your needs better.
• Create a new rule using WAN as interface, 192.168.1.1/32 as source, the previously created IP Alias 42.1.2.3/32 as Translation/Target and IPv4/any as protocol.
  

To get a more readable configuration I would first set up Aliases under Firewall->Aliases for 42.1.2.3/32 and 192.168.1.1/32 and use them in the NAT rule instead of IP adresses :)

Title: Re: Configure the virtual ip for a pc
Post by: Silver77 on October 08, 2021, 07:58:39 am

thanks a lot GoodOm.  I understood that I had to use the outbond, but your description is accurate.
Admin can close the 3D
Thanks

Title: Re: Configure the virtual ip for a pc
Post by: Silver77 on October 12, 2021, 05:01:57 pm

I use this type of configuration  for a published PBX. I have a problem now, the calls arrive correctly and if I check my public ip matches the one assigned, but when I make a phone call I see that the connection is established with the previous ip and not with the new ip. I do not understand why