Speed IP Webcam

Discussion in 'HyperWRT Firmware' started by Laurentwb, May 11, 2006.

  1. Laurentwb

    Laurentwb Network Guru Member


    I'm considering to acquire an wireless IP Webcam.
    One opportunity is a Webcam that only works in Wireless Network Mode B only.
    My router is a WRT54GS with Thibor 15b3.

    My question is the following : Is this B-only Webcam going to slow down the whole wireless network or will the 2 protocols (B and G) be managed together by the router ?

  2. prowler1968

    prowler1968 Network Guru Member

    If you use a B wireless device, the router will function with both devices at their respective speeds.

    The B and G devices both operate in the same frequency range and WILL cause marginal slowdowns. However, the same holds true if you have multiple G only or B only devices. It should not be a difference that is noticible enough that you need to be concerned about, however.
  3. Laurentwb

    Laurentwb Network Guru Member

    Thanks a lot.
    The guy at the store had no idea and placed himself on the safe side saying that it would restrict the whole network to 11 mb/s.

    Thanks a lot.
  4. Laurentwb

    Laurentwb Network Guru Member


    I'm now trying to use DDNS to have an easy access to the camera that I may connect in future.
    What I see is that WRT54GS considers that its IP address is which is, in fact the address on which my ADSL modem (Alcatel Speedtouch 510) sends everything. The real address is obviously different (and dynamic).

    Could anyone tell me how to have WRT54GS picking up the IP address on the Internet side ? I've tried to search on the forum but did not find a explanation that I understand.

  5. pisko

    pisko Guest

    just open account on some dyndns service

    input account data into router setup and hola :)

  6. prowler1968

    prowler1968 Network Guru Member

    Hyperwrt 15C supports Dyndns.com, Zoneedit, and TZO.com. Pick one of these and open an account there. You will pick your username, password, and a domain name (ie myname.dyndns.com, etc.).

    You will go into your router setup on the DDNS tab, select the correct DDNS provider, and enter the required information (username, password, domain).

    You should be able to access your camera remotely by going into your web browser and selecting myname.dyndns.com:port where the port is the port you have set up in the camera for its web server. You may also need to redirect a port on the router to access the camera, depending on the model and setup.
  7. Laurentwb

    Laurentwb Network Guru Member

    Thanks to both of you.

    I already did what you say. The problem is that the IP address sent by WRT54GS to Dyndns.org is which is the address given by my ADSL modem (Alcatel Speedtouch 510) to WRT54GS.

    What I need is how to have WRT54GS to detect the real internet address given by my provider (Skynet in Belgium) to this Alcatel modem.

  8. grcore

    grcore Network Guru Member

    the WRT will report the address it gets on the WAN interface, so you will need to put your modem in bridged mode.

  9. Laurentwb

    Laurentwb Network Guru Member

    Hello again,

    Thanks for the help.
    Now I've put the modem in bridged ethernet mode and the router in PPOe.
    Works great and the DDNS service also.

    However, a new minor problem appeared : I can't access the modem config page anymore (
    How do I do to get the fonction back ?

  10. Thibor

    Thibor Super Moderator Staff Member Member

    you can't. that's the thing about bridge mode. if you need to administer it, connect directly to it. or, you could do a search here on the forums, there are a couple of iptables commands that will help. you just have to search
  11. Laurentwb

    Laurentwb Network Guru Member

    OK, thanks.

    This is far from my competences. I'll make some search in case but I'll probably give up. If I need to administer the modem, I can always switch the router to "automatic cobfiguration - DHCP" for a few minutes.

    Thanks to all of you folks. All this is quite fun !
  12. grcore

    grcore Network Guru Member

    Actually you can administer the modem, but you need to add a route to it manually through the CLI.

    example, if your modem uses as it IP:
    iptables -I POSTROUTING -t nat -o vlan1 -d -j MASQUERADE 
    ip addr add dev vlan1 brd +
    That /30 netmask would leave two host addresses, .1 and .2. Depending on your modems default IP, you may have to adjust the netmask down to 29 or 28, or you could just go with 24 to include the entire 3rd octet.

  13. Laurentwb

    Laurentwb Network Guru Member

    Thanks a lot !
    It works great !

    Last question : I've tried to put the 2 command lines in the startup script and have put Telnet Daemon to start automatically at startup. This does not work.
    Any additional trick to get it working ?

    Again, Thanks to grcore
  14. grcore

    grcore Network Guru Member

    add those commands to firewall_script instead of startup script.

  15. Laurentwb

    Laurentwb Network Guru Member

    OK, it works great !
    Thanks a lot.

    Is there a website or a threat where I could learn the basics for ip tables commands ? It is great, sounds fun and I'll like to learn a bit about it.

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