NAT

Network Address Translation (NAT) modifies the source IP address or destination of packages transmitted through the network router. To manage NAT rules, navigate to  Products/Services → Virtual DC→ Routers→ NAT → Add:  

Enter the following parameters:

• Data-center network — select a data-center network. You can select all networks connected to the router; 
• Rule type — NAT rule type: 
  • SNAT — a SNAT rule changes the source IP address; 
  • DNAT — a DNAT rule changes the destination IP address; 
• Description  — enter a text to describe the rule;
• Protocol  — Select the protocol to which the rule applies. If the SNAT files are hidden, the rule will be applied to any protocol;
• Source IP/range— IP address of the request sent to the router. For the SNAT — enter an internal address or range. For the DNAT — enter an external address or range. If you set up integration with vCloud Director 9.0 note the following limitations: 
  • The DNAT rule for external network — you can enter only external IP addresses; 
  • The DNAT rule for organization  — you can enter only internal IP addresses. 
• Translated IP/range— select the IP address or a range of IP addresses to which destination addresses on inbound packets will be translated. For the SNAT — enter an external address or range. For DNAT — enter an internal address or range. If you set up integration with vCloud Director 9.0 note the following limitations: 
  • The SNAT rule for external network —  you can enter only external IP addresses; 
  • The SNAT rule for organization  — you can enter only internal IP addresses. 

Configuration rules

• in different NAT rules you cannot use the same combination of the source IP and source port; 
• if you create a DNAT rule for the organization network, the source IP/range must not be included into the range of IP addresses of the router DHCP-server; 
• the source IP/range cannot include an external VPN IP address; 
• If you create a SNAT rule for the organization, the translated IP/range must not be included  into the range of IP addresses of the router DHCP-server; 
• the source IP/range of a  DNAT rule must not include the IP addresses from the source IP/range of another DNAT rule; 
• the translated IP/range of the SNAT rule cannot include IP addresses from the translated IP/range of another SNAT rule.