fixed : use one printer in two networks at the same time

Question :

I have a network printer on my (private) network that I would like to make available to the people on my AirPort Guest Network, but I don’t want guests to access my private network.

Is there a way to do this ?

 

Answer :

There are options to do this, but it can’t be done the way you would find most elegant probably… the problem is the restriction in AirPort Guest Networks that users can’t connect to each other, so adding the printer to the AirPort Guest Network won’t make it available to any AirPort Guest Network user.

On the other hand, an other restriction on most network printers is that they only have one Ethernet-card that is shared between the UTP-cable port and the WiFi connection, so the cable-connection and the WiFi-connection will always have the same IP-address, making it impossible to connect the cable to your private network and joining the Guest Network using the WiFi-connection at the same time…

Your best option is to connect the Ethernet/UTP-cable and/or the printer’s WiFi to your private network and creating a separate network to be used as a Guest Network to which the printer can be connected using it’s USB-cable. Since you will need an extra wireless router or an extra (secondhand) AirPort Base Station or Time Capsule to create this separate Guest Network, you can plug the printer’s USB-cable into that wireless router / AirPort Base Station / Time Capsule.

You could also use a printer server, if it isn’t possible to connect the printer’s USB-cable into the wireless router / AirPort Base Station / Time Capsule. You can find relatively cheap print servers on Amazon.com, Amazon.co.uk or Amazon.de

Regarding the setup of your networks, you will probably be best off doing it like this :

  • set your internet modem in router mode (if you would set it in bridge mode, you wouldn’t be able to connect two separate networks behind it)
  • connect both routers (or AirPort Base Station or Time Capsule) to the internet modem
  • setup one router (or AirPort Base Station or Time Capsule) to create the private network and private WiFi network
  • setup the other router (or AirPort Base Station or Time Capsule) to create the Guest Network and Guest WiFi Network
  • make sure that the IP-ranges issued by both routers are completely different (to prevent easy connection from the Guest Network to your private network (and the other way around)
  • if any of your routers give a “Double NAT” error, just ignore it

That’s it !

the only downsite is that having such a complex network setup with multiple routers will have negative influence on your (internet) connection speed ; this difference in speed will probably not be very big if you have few devices connected, but if you have a lot of devices connected that also use a lot of bandwidth (like video streaming) you will probably have slower internet speed than you used to…

enjoy !

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info : setting up Back To My Mac through a TG712 modem-router

Question :

How do I setup my Thomson TG712 modem-router to allow me to use the the Back To My Mac function of my Macs ?

Answer :

Here’s how to turn on Back To My Mac when you have a TG712 modem-router :

– on your Mac, go to Apple —> System Preferences —> iCloud

– then put a check mark at “Back To My Mac” to turn the service on

– if there’s a “More…”-botton click it, just for your information ; if a warning is listed, read it, keep it in mind, and don’t bother…

– then open Safari (or any other internet browser) on your Mac, and type the web based control panel’s IP-address of your router-modem as the URL ; for the TG712 router- modem, the IP-address is 192.168.1.254

– in the web based control panel, go to “Toolbox” (in the menu on the left) –> “Games & Apps Sharing” (in the menu on the left)

– then in the middle of the page, at the bottom, from the “Choose a task…” list, click on “Add a game or application to a local networking device” (the first link in the list)

– in the page that opens, put check marks both at “Use UPnP:” and “Use extended security:”

– and set the “Game or App”-dial (the one that is initially at “ABC (Another Bittorent Client)”) to “Back To My Mac”

– set the “Device”-dial to your Mac (which is the Mac that you would like to use with Back To My Mac, so probably your Mac-server or desktop-Mac)

– just to be able to trace possible errors, put a check mark at “Logging”

– then click on the “Add”-button

– wait for the router-modem to restart

– logout by closing the browser-page with the web based control panel on it

Now you should be able to log into your (home) Mac, when being at a remote location (if there’s internet connection there…)

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tip : quickly switching your AirPort Guest Network ON or OFF from your iPhone, iPad or Mac

Question :

I have an AirPort Guest Network setup on my WiFi network, but most of the time I don’t need it… is there a way to temporarily switch it OFF ?

Answer :

Yes, you can do that quickly using the AirPort Utility app on your iPhone, iPad or Mac.

Here’s how to :

– make sure you have the AirPort Utility app installed (on your Mac it’s pre-installed), for your iPhone or iPad, you can download it here :

http://itunes.apple.com/us/app/airport-utility/id427276530?mt=8

– open the AirPort Utility

– click on the picture of your AirPort Base Station (or Time Capsule)

– if you’re asked to type your password, type the password you’ve set on access of your AirPort Base Station hardware (note : that is something else than your WiFi / AirPort password)

– in the page (on your Mac it’s a popup window) that opens, click the EDIT-button

– on the page that opens in iOS, select your Guest Network and on the next page switch Guest Network OFF and click on DONE, then DONE again on the next page and UPDATE in the popup panel

– on your Mac you should select the “Wireless”-tab and uncheck the check mark in front of Guest Network and click UPDATE

– then wait for the AirPort Base Station (or Time Capsule) to restart, and then exit the AirPort Utility app

– Done !

To switch the Guest Network back on, just use the same procedure, but put the Guest Network to ON (in stead of OFF).

fixed : bypassing AirPort Guest Network conflict with TG712 router-modem

Question :

I’m trying to setup an AirPort Guest Network on my wireless network, so I need to set my AirPort Base Station (or Time Capsule) to “DHCP and NAT”-mode, but I have a TG712 router-modem that doesn’t have any option to turn DHCP off, so I get a “Double NAT”-error. Even my ISP’s helpdesk say they can’t help me on this one… What can I do ?

Answer :

If your router-modem can’t turn off it’s DHCP-server function, you should preferably set your AirPort Base Station (or Time Capsule) to “Bridged Mode”to get the easiest setup and the best performance. On the other hand : if your AirPort Base Station of the 3rd generation or newer (or it is a Time Capsule), then AirPort’s Guest Network mode is the easiest and safest way to give internet access to your visitors (temporary) internet-access, without giving them access to my private wireless/ethernet network. Even though your internet connection performance may slightly degrade, you can get both of these worlds combined. Here’s how :

– first, make sure that your router-modem is on, and that only one ethernet/UTP port is connected ; the ethernet/UTP-cable from that one port should go directly into your AirPort Base Station’s WAN-port and all your WiFi and Ethernet/UTP equipment should connect to the AirPort Base Station, not to the router-modem

– then open AirPort Utility (version 6 or newer – settings needed in previous versions of AirPort Utility are similar, but the user interface for setting it up is completely different) 

– click on the (large) AirPort Base Station icon

– in the popup window that opens, click on the EDIT-button

– now you’ll get the pulldown window where you can set your preferences

– select the “Internet”-tab

– set “Connect Using:” to “Static”

– if things were on “DHCP” before,  leave the rest as is… else go to “Router Address:” and type your modem-router’s IP-address (for the TG712 that would be 192.168.1.254), then at “IPv4 Address:” type an IP-address that only differs on the last digit (so 192.168.1.12 or something like it) and set “Subnet Mask:” to 255.255.255.0 ; at “DNS Servers:” type the IP-addresses of the Primary and Secondary DNS that your ISP has given you (if you can’t find those, you should be able to use Google’s Public DNSes : 8.8.8.8 and 8.8.4.4)

– select the “Network”-tab

– set “Router Mode:” to “DHCP and NAT”

– then select the “Wireless”-tab

– there, you should put a check mark at “Enable Guest Netwok:” and give your future Guest Network a distinguishable name

– set “Guest Network Security:” to “WPA/WPA2 Personal”

– then, at “Guest Network Password:” type a password that you can easily remember, but is not like any other password you’ve ever used before

– at “Verify Password:” retype that same password

– then select the “Network”-tab again

– there, you should click on the “Network Options…”-button

– in the pulldown panel, set “DHCP Lease:” to “1 day”

– set “IPv4 DHCP Range:” to something different than your router-modem’s DHCP range , so if your router-modem is at IP-address 192.168.1.254 (like the TG712), set it to something like “192.168.2.2 to 200”

– then set “Guest IPv4 DHCP Range:” to yet another range than the router-modem and the primary wireless network – in this example that would be something like “10.0.3.2 to 200”

– put a check mark at “Enable NAT Port Mapping Protocol”

– and do not put a check mark at “Enable default host at:”

– then click SAVE

– and click UPDATE

– in the “AirPort Base Station has closed down” warning window, click OK, and wait…

– you might get a question whether you approve that the “Double NAT” error should not be regarded as an error – if so, click OK

– after that, log into your modem-router and set it’s wireless to “Off” and make sure you set a non-standard password for accessing the router-modem !! (*) (else your visitors can still mess with your network pretty easily)

– Done ! enjoy !

Note : if you have an iPhone or iPad, you can use the free AirPort Utility app to switch your Guest Network quickly ON or OFF now… (for instructions look here)

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(*) if you have a Speedtouch / Thomson / Technicolor TG712 router-modem (e.g. the one that used to be provided by dutch ISP’s KPN and Wanadoo / Orange / Online / T-Mobile), you should do this as follows :

– in Safari (or any other internet browser) type 192.168.1.254 as the URL

– now your web based control panel for your TG712 router-modem will open

– go to “Home Network” (in the menu on the left) —> “Devices” (in the menu on the left) —> “Configure” (in the upper right corner) and delete the check mark at “Interface enabled:”

– then go to “Toolbox” (in the menu on the left) —> “User administration” (in the menu on the left) and write down the Login (= User name) that is listed there, you will need it later

– the click on “Change My Password” (the link in the middle at the bottom)

– in the page that opens, at “Old password” type nothing (leave blank – there is no preset password), and at “New password” type a password that you’ve never used before and that is hard to crack (if you can’t make up one yourself, you can use OSX’s internal password generator to suggest one to you – look here for instructions) and retype that password at “Confirm new password:”

– then click on the “Cange password”-button and wait for your router-modem to restart

– then login to your router-modem again – this time your will be asked for your login name and password, type both of them and put a check mark at “have OSX Keychain remember these”

– wait for the the web based control panel to open, and then exit by closing the page in your browser

– Done !

Note : don’t be afraid to use a password on your router-modem that you can’t easily remember… if you have it remembered by OSX Keychain you don’t have to… and even if you completely lose the password, you can still reset the modem-router to factory defaults by pressing the RESET button that is on the modem-router housing…