Belkin Router F5D7231-4 User Manual

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Using the Access Point Mode
Note: This  advanced  feature  should  be  employed  by  advanced  users 
only.  The  Router  can  be  configured  to  work  as  a  wireless  network 
access  point.  Using  this  mode  will  defeat  the  NAT  IP  sharing  feature 
and  DHCP  server.  In  Access  Point  (AP)  mode,  the  Router  will  need  to 
be  configured  with  an  IP  address  that  is  in  the  same  subnet  as  the...

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Configuring the Firewall
Your  Router  is  equipped  with  a  firewall  that  will  protect  your  network 
from  a  wide  array  of  common  hacker  attacks  including:
•  IP  Spoofing
•  SYN  flood
•  Land  Attack
•  UDP  flooding
•  Ping  of  Death  (PoD)
•  Tear  Drop  Attack
•  Denial  of  Service  (DoS) 
•  ICMP  defect
•  IP  with  zero  length 
•  RIP  defect
•  Smurf  Attack
•  Fragment...

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Configuring Internal Forwarding Settings 
The  “Virtual  Servers”  function  will  allow  you  to  route  external  (Internet) 
calls  for  services  such  as  a  web  server  (port  80),  FTP  server  (Port  21), 
or  other  applications  through  your  Router  to  your  internal  network. 
Since  your  internal  computers  are  protected  by  a  firewall,  computers 
outside  your  network  (over  the  Internet)...

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Setting Client IP Filters 
The  Router  can  be  configured  to  restrict  access  to  the  Internet,  email, 
or  other  network  services  at  specific  days  and  times.  Restriction  can  be 
set  for  a  single  computer,  a  range  of  computers,  or  multiple  computers.
 
To  restrict  Internet  access  to  a  single  computer,  for  example,  enter 
the  IP  address  of  the  computer  you  wish...

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Setting MAC Address Filtering 
The  MAC  address  filter  is  a  powerful  security  feature  that  allows  you 
to  specify  which  computers  are  allowed  on  the  network.  Any  computer 
attempting  to  access  the  network  that  is  not  specified  in  the  filter  list 
will  be  denied  access.  When  you  enable  this  feature,  you  must  enter 
the  MAC  address  of  each  client  (computer)  on  your...

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Enabling the Demilitarized Zone (DMZ) 
The  DMZ  feature  allows  you  to  specify  one  computer  on  your  network 
to  be  placed  outside  of  the  firewall.  This  may  be  necessary  if  the 
firewall  is  causing  problems  with  an  application  such  as  a  game  or 
video  conferencing  application.  Use  this  feature  on  a  temporary  basis. 
The  computer  in  the  DMZ  is  NOT  protected...

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Blocking an ICMP Ping
Computer  hackers  use  what  is  known  as  “pinging”  to  find  potential 
victims  on  the  Internet.  By  pinging  a  specific  IP  address  and  receiving 
a  response  from  the  IP  address,  a  hacker  can  determine  that  something 
of  interest  might  be  there.  The  Router  can  be  set  up  so  it  will  not 
respond  to  an  ICMP  ping  from  the  outside.  This  heightens  the...

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Utilities Tab
This  screen  lets  you  manage  different  parameters  of  the  Router  and 
perform  certain  administrative  functions.
  

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Restarting the Router
Sometimes  it  may  be  necessary  to  restart  or  reboot  the  Router  if  it 
begins  working  improperly.  Restarting  or  rebooting  the  Router  will 
NOT  delete  any  of  your  configuration  settings.
Restarting the Router to Restore Normal Operation 
1.
    Click  the  “Restart  Router”  button.
2.    The  following  message will  appear.  Click  “OK”.
3.    The  following  message will...

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Restoring Factory Default Settings
Using  this  option  will  restore  all  of  the  settings  in  the  Router  to  the 
factory  (default)  settings.  It  is  recommended  that  you  back  up  your 
settings  before  you  restore  all  of  the  defaults.
1.    Click  the  “Restore Defaults”  button.
2.    The  following  message will  appear.  Click  “OK”.
3.    The  following  message will  appear....