25: Configuring DHCP forwarding
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© Virtual Access 2018
GW2020 Series User Manual
Issue: 2.1
Page 249 of 423
25.4
DHCP forwarding over IPSec
DHCP messages are forwarded over the WAN interface using the IP address of the WAN
interface as the source IP for the transmitted packet. This means that when forwarding
over an IPSec tunnel a source NAT firewall rule is required to change the source IP to
match an IPSec connection rule.
25.4.1
Configuration packages used
Package
Sections
firewall
redirect
25.4.2
Configuring source NAT for DHCP forwarding over IPsec
To enter a source NAT rule, browse to Network -> Firewall. Select Traffic Rules tab.
The Firewall - Traffic Rules page appears. Configure a source NAT rule that changes the
source IP for UDP destination port 67 from the required LAN.
For more information on configuring a source NAT rule, read the ‘Configuring Firewall’
section of the User Manual.
Figure 124: The firewall – traffic rules configuration page