User guide
Table Of Contents
- 1 Security recommendations
- 2 CERTIFICATE OF CONFORMITY
- 3 Products identification
- 4 Data-sheet
- 5 Product overview
- 1 Dimensions
- 2 Connectors
- 3 Led indicators
- 4 DIP switches
- 5 Factory default push-button
- 6 Mounting the product on a DIN rail or removing it
- 7 Cooling
- 8 RS232 interface
- 9 RS485 interface
- 10 Digital input and output
- 11 Connecting the antenna
- 12 Installing the SIM card
- Set up steps
- 2 Connecting a PC to the router for configuration
- 3 Rebooting the router after parameters changes
- 4 Recovering the factory LAN IP address
- 5 Recovering the factory configuration
- 6 Restricting access to the administration server
- 7 Recovering a free access to the administration server
- 8 Factory configuration
- 9 LAN interface set up
- 10 UMTS – GSM-GPRS-3GDGE interface set up
- 11 Setting up the DynDNS service
- 12 Creating VPN connections between routers
- 13 Routing functions
- 14 Address and port translation
- 15 VRRP redundancy
- 16 Remote users connections service
- 17 Remote users connections
- 18 M2Me_Connect service
- 19 Users list
- 20 Firewall
- 21 Serial to IP gateway
- 22 USB to IP gateway
- 23 Advanced functions
- 1 Diagnostic menu
- 2 Saving the configuration to a file
- 3 Updating the firmware
- Signets Word
SET UP
Page 82 User guide ref 9020009-01 UMTS GPRS EDGE router ref. RAS-3G
23.4 Configuring the DNS server
For domain names resolution, the RAS-3G can behave like a domain name server or a domain name
relay.
DNS server :
A domain name server is a networking device which is able to associate a label (etictelecom.com for
instance) with an IP address.
That function allows a client device to send a request to a network equipment referring to a domain
name as if it was the actual IP address of the destination device.
The RAS-3G router is able to resolve any domain name composed with the name of one of the
devices entered in the devices list followed the site name which is entered at the top of the devices
list.
DNS relay :
The RAS-3G router behaves also like a DNS relay; any DNS request it receives from the LAN, which
cannot be resolved because the device is not registered in the devices list, will be transferred to the
internet to be resolved.
That function can be carried out only if the RAS-3G IP address is pointed out as the main DNS server
of the devices of the LAN.
That function is efficient in particular when a device connected to the LAN has to send emails through
the Internet.