port forwarding

Discussion in 'Cisco Small Business Routers and VPN Solutions' started by buttressinfo, Sep 7, 2005.

  1. buttressinfo

    buttressinfo Network Guru Member

    I am in the process of setting up port forwarding for a
    small network using a rv016 linksys

    setup will be

    1 ip from isp

    10 computers inside the router.
    using iprange

    primarily need to setup and allow net access and VNC for demonstrating software.


    client accesses staff computer via ip:port below
    externaladdress port

    vnc responds on port 5910...9

    how would this type of system be set up?
  2. username_taken

    username_taken Network Guru Member

    If the workstations are Windows XP I would strongly suggest you use Remote Desktop Connection rather than VNC as it requires less bandwidth to work which means it is quicker.

    Are demonstrations going to be done from your own hardware? (i.e. a laptop) If so I would suggest a VPN tunnel would be better that port forwarding ( more secure, easier to run on the client side ). If you have an SSH server on the LAN you could also do it via ssh tunnelling ( again more secure ).
  3. buttressinfo

    buttressinfo Network Guru Member

    thanks for the info, however its necessay to use java VNC in this case.

    client clicks on web site then connects to sales machine via ip and port number this then needs to be forwarded to the internal machine alowing in and out access

    aaa.bbb.ccc.ddd:5808 ->
    then allow VNC to work on port 5908

  4. willgill

    willgill Network Guru Member

    I think you're pretty much figured out what needs to be done.
    You'll need to use some hacked firmware to increase the number of port forwarding on your router. Make the appropriate port fowards as you listed. I recommend starting at the default 5900 and going UP not down. Other VNC products (listener, repeater, single click) use 5xxx ports.

    Next, you'll have to install UltraVNC Server an all sales machines.
    Check the "Ports" radio button and only check Java Http. Input the appropriate port you want that server to have.

    You'll also want to DISABLE FILE TRANSFER.
    Figure out what "Multiple connection option" works best for your situation. .. I'm guessing "Refuse".

    Getting this thing working will be a snap compared to locking these sales systems down from hackers. I'd make sure only known/registered customers get the VNC password. Keep these computers isolated from your network. Change passwords very frequently.

    BTW, in my experience speed difference between UltraVNC and RDP/Terminal Services is almost negligable.
  5. buttressinfo

    buttressinfo Network Guru Member

    Hey Thanks for that info I thought I was on the right track.

    the linksys system I'm using seems odd.

    Will I need to only add the rules to the forwarding are under the setup tab or will I need to add firewall access also?

    One final thing will they need tcp and udp or both?

    I'm using a rv016 16 port router.

    thanks again any assistance would be super.
  6. TazUk

    TazUk Network Guru Member

    VNC I believe uses TCP.
  7. buttressinfo

    buttressinfo Network Guru Member

    cheers I got the port forwarding working

    thanks for assistance
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