1   Basic Configuration ...................... 4
1.1   Configure the 3G Wireless interface .. 4
1.1.1  Network Configuration .......................... 5
1.1.2  Setting the SIM card PIN ........................ 5
1.1.3  Adding a Network 
  Connection Profile ................................... 6
1.1.4  Enable the Wireless Connection .......... 9
1.1.5  Checking the Status of the 
  Connection ..............................................10
1.2   Configure the LAN interface and 
  DHCP Server ..........................................12
1.2.1  Setting the IP Address ...........................12
1.2.2  Enabling DHCP .......................................12
1.3   Configure clients to use the 
  MRD-3xx ..................................................14
2   System Administration .............. 15
2.1   Administration ........................................15
2.2   System Information ................................17
2.3   Configuration Backup & Restore .......18
2.4   Firmware Upgrade .................................20
2.5   SNMP ........................................................22
2.6   GPIO .........................................................23
3   Wireless Interface Configuration 24
3.1   Network Configuration ........................25
3.1.1  Wireless Operating Mode ...................26
3.1.2  Operating Frequency Band ..................27
3.1.3  Setting the SIM card PIN ......................27
3.2   Packet Mode Configuration .................29
3.2.1  Adding a Network Connection 
  Profile ........................................................29
3.2.2  Deleting a Profile....................................32
3.2.3  Editing a Profile .......................................33
3.2.4  Enable the Wireless Connection ........34
3.2.5  Checking the Status of the 
  Connection ..............................................35
3.3   Connection Management .....................39
3.3.1  Connection Establishment ...................40
3.3.2  Connection Maintenance .....................42
3.3.3  Remote Poll Setup .................................43
3.3.4  Miscellaneous Options ..........................44
3.3.5  Connect on Demand ............................45
3.4   Circuit Switched Data (CSD) Mode..45
3.4.1  CSD Single Port......................................46
3.4.2  CSD Multiplexed ....................................47
3.5   SMS Triggers ............................................50
3.5.1  Trigger configuration .............................50
3.5.2  Access Control .......................................52
3.5.2.1 Example: Default policy accept.........53
3.5.2.2 Example: Default policy to Drop .....54
4   Network ...................................... 56
4.1   LAN Interface .........................................56
4.1.1  Changing the IP Settings of the 
  LAN Interface .........................................56
4.1.2  Disabling the LAN Interface ................58
4.2   DHCP Server Configuration ...............59
4.3   Configuring clients to use the 
  MRD-3xx ..................................................60
4.4   Domain Name System (DNS) ............61
4.4.1  DNS Proxy ..............................................61
4.4.2  Manual DNS Configuration .................62
4.4.3  Dynamic DNS Client Configuration..62
5   Firewall ........................................ 64
5.1   Firewall Setup ..........................................64
5.1.1  Network Address and 
  Port Translation (NAPT) ......................65
5.1.2   Stateful Packet Inspection (SPI) .........65
5.1.3  Connection tracking options...............66
5.2   Access Control .......................................67
5.2.1  Accessing unit services from the 
  wireless port or VPN tunnels .............68
5.3   DoS Filters ...............................................69
5.3.1  Enabling the Denial of Service filters 70
5.4   Custom Filters ........................................71
5.4.1  Description ..............................................71
5.4.2  New Custom Filter Options ...............72
5.4.3  Adding a new custom filter .................75
Table of Contents