Belkin Router F5D5231-4 User Manual

							
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Configuring Virtual Servers
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,  machines  from  the 
Internet  cannot  get  to  them  because  they  cannot  be  “seen”.  If  you  need 
to  configure  the  “Virtual  Servers”  function  for  a  specific  application,  a 
list  of  common  applications  has  been  provided.  If  your  application  is  not 
listed,  you  will  need  to  contact  the  application  vendor  to  find  out  which 
port  settings  you  need. 
Choosing an Application
Select  your  application  from  the  drop-down  list.  Click  “Add”.  The 
settings  will  be  transferred  to  the  next  available  space  in  the  screen. 
Click  “Apply  Changes”  to  save  the  setting  for  that  application.  To 
remove  an  application,  select  the  number  of  the  row  that  you  want  to 
remove,  then  click  “Clear”.
Manually Entering Settings into the Virtual Server
To  manually  enter  settings,  enter  the  IP  address  in  the  space  provided 
for  the  internal  (server)  machine  and  the  port(s)  required  to  pass  (use  a 
comma  between  multiple  ports).  Then  select  the  port  type  (TCP  or  UDP) 
and  click  “Apply  Changes”.  You  can  only  pass  one  port  per  internal  IP 
address.  Opening  ports  in  your  firewall  can  pose  a  security  risk.  You  can 
enable  and  disable  settings  very  quickly.  It  is  recommended  that  you 
disable  the  settings  when  you  are  not  using  a  specific  application. 
						

							
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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  to  restrict  access  to  in 
the  IP  fields 
(1).  Next,  enter  “80”  and “80”  in  the  “Port”  fields (2). 
Select  “Both” (3).  Select  “Block” (4).  You  can  also  select  “Always” 
to  block  access  all  of  the  time.  Select  the  day  to  start  on  top (5), 
the  time  to  start  on  top (6),  the  day  to  end  on  the  bottom (7),  and 
the  time  to  stop (8)  on  the  bottom.  Select  “Enable” (9).  Click  “Apply 
Changes”.  The  computer  at  the  IP  address  you  specified  will  now  be 
blocked  from  Internet  access  at  the  times  you  specified.  Note:  Be 
sure  you  have  selected  the  correct  time  zone  under  “Utilities>  System 
Settings>  Time  Zone”.
(3)(4)(7)(8)(9)
(1)(2)(5)(6) 
						

							
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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  on  your  network  to  allow 
network  access  to  each.  The  “Block”  feature  lets  you  turn  on  and  off 
access  to  the  network  easily  for  any  computer  without  having  to  add 
and  remove  the  computer’s  MAC  address  from  the  list. 
To  enable  this  feature,  select  “Enable  MAC  Address  Filtering”
 (1). 
Next,  enter  the  MAC  address  of  each  computer  on  your  network  by 
clicking  in  the  space  provided 
(2)  and  entering  the  MAC  address  of 
the  computer  you  want  to  add  to  the  list.  Click  “Add” (3),  then  “Apply 
Changes ”  to  save  the  settings.  To  delete  a  MAC  address  from  the  list, 
simply  click  “Delete”  next  to  the  MAC  address  you  wish  to  delete. 
Click  “Apply  Changes”  to  save  the  settings. 
Note:   You  will  not  be  able  to  delete  the  MAC  address  of  the  computer 
you  are  using  to  access  the  Router’s  administrative  functions  (the 
computer  you  are  using  now). 
(1)
(2)
(3) 
						

							
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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  from  hacker  attacks. 
To  put  a  computer  in  the  DMZ,  enter  the  last  digits  of  its  IP  address  in 
the  IP  field  and  select  “Enable”.  Click  “Apply  Changes”  for  the  change 
to  take  effect.  If  you  are  using  multiple  static  WAN  IP  addresses,  it 
is  possible  to  select  which  WAN  IP  address  the  DMZ  host  will  be 
directed  to.  Type  in  the  WAN  IP  address  you  wish  the  DMZ  host  to 
direct  to,  enter  the  last  two  digits  of  the  IP  address  of  the  DMZ  host 
computer,  select  “Enable”  and  click  “Apply  Changes”.  
						

							
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WAN Ping  Blocking
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 
level  of  security  of  your  Router. 
 
To  turn  off  the  ping  response,  select  “Block  ICMP  Ping” 
(1)  and  click 
“Apply  Changes”.  The  Router  will  not  respond  to  an  ICMP  ping. 
(1) 
						

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

							
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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  appear.  Restarting  the  Router  can 
take  up  to  60  seconds.  It  is  important  not  to  turn  off  the  power  to 
the  Router  during  the  restart.  Click  “OK”.
4. A  60-second  countdown  will  appear  on  the  screen.  When  the 
countdown  reaches  zero,  the  Router  will  be  restarted.  The  Router 
home  page  should  appear  automatically.  If  not,  type  in  the 
Router’s  address  (default  =  192.168.2.1)  into  the  navigation  bar 
of  your  browser. 
						

							
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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.  Restoring  the  defaults 
includes  restarting  the  Router.  It  can  take  up  to  60  seconds.  
It  is  important  not  to  turn  the  power  to  the  Router  off  during  
the  restart  or  the  Router  could  be  damaged.
4. A  60-second  countdown  will  appear  on  the  screen.  When  the 
countdown  reaches  zero,  the  Router’s  defaults  will  be  restored. 
The  Router’s  home  page  should  appear  automatically.  If  it  does 
not,  type  in  the  Router’s  address  (default  =  192.168.2.1)  into  the 
navigation  bar  of  your  browser. 
						

							
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Saving a Current Configuration
You  can  save  your  current  configuration  by  using  this  feature.  Saving 
your  configuration  will  allow  you  to  restore  it  later  if  your  settings  are 
lost  or  changed.  It  is  recommended  that  you  back  up  your  current 
configuration  before  performing  a  firmware  update.
1. Click  “Save”.  A  window  called  “File  Download”  will  open.  
Click  “Save”.
2. A  window  will  open  that  allows  you  to  select  the  location  where 
you  want  to  save  the  configuration  file.  Select  a  location.  You 
can  name  the  file  anything  you  want,  or  use  the  default  name 
“Config”.  Be  sure  to  name  the  file  so  you  can  locate  it  yourself 
later.  When  you  have  selected  the  location  and  name  of  the  file, 
click  “Save”. 
						

							
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3. When  the  save  is  complete,  you  will  see  the  window  below. 
Click  “Close”.
The  configuration  is  now  saved.
Restoring a Previous Configuration
This  option  will  allow  you  to  restore  a  previously  saved  configuration.
1. Click  “Browse” .  A  window  will  open  that  allows  you  to  select  the 
location  of  the  configuration  file.  All  configuration  files  end  with  a 
“.bin”.  Locate  the  configuration  file  you  want  to  restore  and 
double-click  on  it.