Robustel W800 - Manual (Page 43)

Robustel GoFixed W800 User Guide
RT_W800_UG_v02.00
04.11.2011 Page 42 /59
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of the GATEWAY to use the built‐in DNS server (recommended).
Get DNS Server from WAN ‐ select to pass the DNS server addresses obtained automatically from the WAN interface
to the DHCP clients.
Configure the second IP address ‐ select to assign an additional IP address to the gateway (advanced option).
Note:
1. When using the DHCP Servers, please make sure you don’t have multiple DHCP Servers in one LAN.
2. To view a list of clients that have been assigned addresses by the DHCP server go to the path DHCP ‐> Assigned
Leases
3. To reserve an IP address within the DHCP range for a client so that the client always receives the same IP address
go to the path DHCP ‐> Static Leases. Click the Add Static Lease button and enter the MAC address and required IP
Address for the client. Make sure that the IP address chosen is within the range entered on the LAN Setup page.
3.10 Firewall
3.10.1 Firewall Settings
Please go to path: Firewall ‐> Firewall Settings page, check Enable to activate Global firewall settings, then click
Apply/SAVE.
Note: three Firewall levels are supported in the Gateway, they are:
„ Low: enable basic firewall feature ‐ prevent port from scanning; allow PING from WAN side; allow ICMP redirect
messages from WAN side.
„ Middle: based on low level, prevent ICMP redirect messages.
„ High: based on middle level, prevent SYN Flood attack; against PING from WAN side.
Note: by default the Firewall is enabled and set to the “High” setting – it is recommended that to maintain maximum
security this setting is not changed.
3.10.2 IP Filters
When the firewall is enabled on a WAN or LAN interface, all incoming IP traffic is BLOCKED. However, some IP traffic