Setup Wireless for internet only

Hi, I have a Wireless G VPN router, model number: wrv200. Ideally, I would like to implement this at a small business. I would like to tie 3 of our office PC's in to the linksys via wired connections. I would then like to offer customers internet access via the wireless - however I ONLY want them to have wireless - I don't want the customers to be able to gain access to the wired network. Is there a way to do this?

Also, please make sure that you set "AP Isolation" to Enabled
you can find it under Wireless > Advanced Wireless Settings
Tiggerjay
MCSE/CCNA/Net+/Sec+
Linksys Partner 5+ years
Linksys LVS/L1 Authorized Var 2+ years

Similar Messages

Wireless Guest Internet Only Access

We just got our 4402 WLC with 1131ag access points up and running. We would now like to set up guest access with only internet access. Our vendor has suggested setting up a dmz on our checkpoint firewall and have it do dhcp and then setting up a wlan on our controller for the guest access. My question is: what do I need to do on the switch side to set this up? Is is just as simple as creating a vlan and giving it an ip address in the dmz range? Or is there another way of setting up internet only guest access?
Any suggestions would be appreciated.
Thanks in advance.
Jeff

It depends if all you are wanting to do is Internet-only on you controller. If thats it, then you can place your controller in a dmz. Have a device handout the dhcp information to your clients. Set your controller for layer-3 mode. Have your APs connect to your controller (make sure you have the correct ports allowed through your firewall between the APs and the controller). I would recommend placing the APs on a seperate VLAN than other internal traffic with the appropriate LWAPP options configured in the DHCP scope.
The clients will then associate to the SSID you have setup. They will pull an IP address from the DMZ.
A few years ago on my first LWAPP deployment, I did this setup and it worked perfectly. I would also recommend having the DHCP server in the DMZ assaign an IP address that is not routable in your internal network. That way, if somebody makes a mistake and their is leakage, the traffic can't be routed anywhere since the source IP address of the wireless client isnt routable. You can use this DMZ controller access for Internet only which can also be used by internal people to VPN back to you internal network if you have that permitted.
If however, you are planning to do both direct connection to your internal network and an internet-only connection (two different SSIDs) the best way is to get a small controller for your DMZ (like a 4402-12) and a larger controller for internal (4402-25 or 4404-100). Have your DMZ controller be a guest internet controller that is setup as the guest "anchor". There are lots of docs on the Cisco web site. This solution works great. I use a 4402-12 as a DMZ anchor and have about 20 4404-100s that are anchored to it.

Dual Connection; Force use of Wireless for Internet, Wired for Networking

Hello,
I have 2 connections at work: 1) ethernet to our local server/network/internet, and 2) wireless internet (through my phone's hotspot). Our connection is very spotty through our network right now, so I want to use my
wifi for internet and the wired to network only.
I've tried manually entering the priorities in the adapter metrics (5 for the wifi and 15 for the ethernet). They still show 9 for wifi and 10 for ethernet as before (netstat -r).
I also found in another forum where to change the connection orders in Advanced Settings (Change adapter settings>Alt>Advanced>Advanced Settings, then move order).
Niether of these solutions have worked. I have to physically unplug my ethernet to get it to use the wireless connection. Webpages will sit there forever and then only half load or not even at all, but when I unplug and hit refresh, they pop right up.
Any help is appreciated

Hi,
The adapter metrics should work. Please take a try to modify the metrics on both of the two adapters, and then recreate the two connections.
Here are some links for reference:
An explanation of the Automatic Metric feature for Internet Protocol routes
Windows Prefers Wired Connections
Best regards
Michael Shao
TechNet Community Support

Article to setup Extreme for N only and optimize settings?!?!

I just replaced an older b/g AIrport Extreme with a newer dual band N version of Airport Extreme. I also replaced my Express b/g with an N version as well. I have the Extreme connected to my Verizon FIOS modem by ethernet and manually configured to "bridge" mode with the goal of maximizing the FIOS speed that can be obtained (versus extending the FIOS wireless network from the Verizon router). I am totally confused about what steps to take to ensure that my new "bridged" network with the Extreme and, subsequently, the Express, only use N and not a/b/g WiFi for the network. I have Airport Utility v5.5. Is there an article or another post that goes through this step by step... for dummies I have found a bunch of posts that address this general topic, but the feedback provided to the OP is usually assuming I know some piece of info that I just don't actually know... one step ahead of me. Thanks for any guidance or feedback to point me in the right direction!

You mentioned in your post that you had manually configured the AirPort Extreme (AEBS) to act as a “bridge” for your Fios router, so I assume that you have likely already configured some other aspects of the AEBS at this time, so I will not go into a lot of detail on some items that are normally fairly intuitive.
If you have not already installed the software that came on the CD with your AEBS, it would be a good idea to do so as some of the most recent dual band products are using a version of AirPort Utility that is not yet available for download from Apple’s site and its also likely that you have a more recent version of the firmware for the AEBS which is also not available for download.
In general, I think it helps most users to temporarily connect an ethernet cable from their computer to one of the LAN <-> ports on the AEBS to configure the device rather than trying to use wireless. So, if you are having difficulty with wireless in trying to configure the AEBS, use the ethernet option.
Speaking of ethernet, you mentioned that you wanted the best performance possible for your network and that would start with the ethernet cables. Make sure they are either CAT5e or CAT6 cables to take advantage of the Gigabit speeds that the AEBS is capable of handling.
Open Airport Utility and click Manual Setup
Click the Base Station tab below the row of icons to enter a name for your device and a device password along with time and time zone settings
Next, click the Wireless tab next to the Base Station tab to display the wireless settings page
Wireless Mode would be Create a wireless network
Wireless Network Name is your choice
Put a check mark in the box next to Allow this network to be extended
Radio Mode should be 802.11n only 5 GHz to provide the fastest speed possible.
You may need to hold down the “option” key on your computer while you click on the selection box to display all the available choices. If you later find that the 5 GHz setting does not penetrate as well as hoped, you will need to return to this area to change the setting to 802.11n only 2.4 GHz
Channel…hold down the option key again when you click on this box. Select one of the higher numbered channels.
Wireless Security would be WPA2 Personal
Wireless Password is your choice
Click the Wireless Options button and make sure there is a check mark next to Use Wide Channels and click Done
Click the Internet icon in the row of icons and check the Connection Sharing setting at the bottom. It should be set to “Off (Bridge Mode)”
Click Update at the lower right and the AEBS will restart in 20-30 seconds and the light should turn green.
Now, take your Macbook and test to make sure that you can get a good internet connection near the AEBS. If so, move your Macbook to the room and position it as close as possible to the location where the AirPort Express (AX) will be installed and check to make sure that you get a good internet connection.
Hold down the “option” key on your computer while you click on the fan shaped Airport icon at the top of your screen. Look for the Transmit Rate number and jot that down for future reference. Move your Macbook around to other locations between the AEBS and the AX location and you will see that the Transmit Rate changes. It will be higher near the AEBS and will fall off as you move away from the AEBS.
Also, please download Air Radar and use the Scan feature at the lower right of the window to get a different look at the signal strength of your AEBS network. Air Radar is not free, but there is a 15 day trial period. Look at the Fios network as well in terms of signal strength where the AX will be located.
You can also use Air Radar to locate any other visible wireless networks in the area to help identify them in case you experience wireless interference issues.
At the tentative AX location,
What is the Transmit Rate that you see?
How strong is the signal from the AEBS in terms of percentage using Air Radar?
How strong is the signal from the Fios router in terms of percentage using Air Radar?
If you connect your Macbook to the Fios network, can you get a Transmit Rate number for that?
Please post back on your results and any questions you have to this point and we’ll decide how best to tackle the “extend” challenge. There will likely be some compromise choices to be made on this next step.

Airport Express not working wirelessly for OSX only

Hi all-
I have spent days reading in these forums and online attempting to resolve my issue, but to no avail.
Computers:
Macbook Pro, 2009, running Snow Leopard 10.6.3 (just updated today)
Imac, 2008, running Snow Leopard 10.6.2
HP Touchsmart, running windows 7
Gaming:
Playstation 30, 60 Gb Launch unit
Xbox 360 Jasper unit
Wii
Wireless:
Airport Extreme Base Station
I have my two year old airport base station creating a wireless network in my condo that had been working fine with no issues. One day I decided to make the network "invisible". My fiance complained so I decided to turn it back. I figured it was just as easy to reset the airport and set it up again from scratch. What a mistake that was.
After restarting the airport and setting it up again, my Imac and Macbook have a VERY hard time connecting, if they even connect at all (rarely can). Here are issues that sometimes occur:
1) They can't find the network at all
2) They can find it, try to login, but get a timeout error after a minute or so
3) They can find it, login, but don't have an IP address are are not "connected to the internet"
4) They find it, ask for a password, I enter it, it says it's wrong (when it's actually not wrong)
5) Computers can not find the airport base station sometimes, even if directly connected to it.
**sometimes all of these issues happen when trying to connect, sometimes one of them just keeps happening over and over, ie, constantly asking for the password no matter how many times I enter the correct one.
I have tried every trick I saw in the forums- changing the airport firmware, changing the type of wireless security (even not having any), deleting saved networks from my airport prefs, changing the channel I'm broadcasting on, doing a hard reset on my airport (I've set the network up from scratch 20+ times trying to fix it), unplugging the modem and shutting all equipment down for 10 minutes or more, etc.
Sometimes If I play with the airport diagnostic/helper enough, it will eventually just work. I have no idea why. The macbook started working one day, worked for a week, and now is back to not connecting. It's driving us insane.
So now the odd part- My HP running windows 7, my ps3, and y wii ALL work flawlessly running on wireless. So do our iphones. The Xbox is wired through the airport, and works fine as well. Also, I called my internet provider, they say my service is fine. When I hook up the imac or macbook to with an ethernet cable from the airport, they get online fine as well- so the problem is only wireless, and only with the computers that are macs. This is why it seems to me that its an OSX issue.
I've read that some people are having connection issues from Snow Leopard- but I didn't upgrade the imac until recently, and the macbook was upgraded and working fine before these issues began.
Any insight/ideas/thoughts/responses will be greatly appreciated. I'll even throw in a beer if you live in the area

Could a nearby home network interfere with mine? I can see two strong network signals from the neighbourhood...
Yes, it is very possible a neighbor got themselves a brand new 802.11n wireless router and have it "cranked-up" to full power to cover their entire house. This may just be enough to affect your wireless network.
I suggest, if you don't already have it, is to get yourself a copy of Koingo's AirRadar. Use it to identify other Wi-Fis operating nearby. Note especially those that have the strongest signal and what channel they are operating on. Sometimes, something as simple as changing channels for your network will do the trick.

Connect via ethernet but wireless for internet

I don't know why, but my apple tv seems to have forgotten how to connect to the internet and I can't make it remember, lol. Now I will stress, this used to work, and I don't know why it suddenly doesn't work anymore...
Basically I have wireless set up at home for the internet. However, I connect to my apple tv via direct ethernet cable between my imac and the apple tv itself. I have set up internet sharing in preferences to share my airport connection over ethernet, which my apple tv used to be able to use ok to connect to the itunes store/you tube, etc. However, it now can't. I had some trouble with it this morning where it wouldn't connect to the ethernet network at all, although it now does. However, it no longer uses the iMac as it's router and I can't seem to figure out why. Can anyone help?
Thanks!

Chris Johnson2 wrote:
We have one MBP (10.5.8) that is able to connect to our network via Ethernet and use all services. But, when it connects via Airport, it will connect to the wireless router, but will not connect to the Internet or the network...
You might try the three suggestions in the second message of this thread:
http://discussions.apple.com/message.jspa?messageID=10445592

Is the Ethernet Port for Internet Only??

I have tried to get an answer to a problem I'm having on another forum, without success, so I am asking it here.
I have removed an internal 250Gb disk from my old G4 Tower and bought an enclosure so that I can use it as an external drive. The enclosure came with some software from a company called Ximeta, which I have installed. The enclosure also comes with a USB 2.0 and RJ45 port. With USB ports at a premium when I am working on locatiion I thought it would be easier to connect using the RJ45 port.
The problem is that whenever I attach the device and register it (using the Ximeta application) it will not mount on my desktop. I have checked the Ethernet port and get messages that say that it has an IP address but cannot connect to the internet. The problem is I am connected to the internet via Airport and my wireless lan, so I am not clear about why the Ethernet port would display this message. Surely, the port can be used for any application, not just internet?
Anyway, the result of several days testing and analysis is that I connect the device via USB and it mounts immediately but I cannot get the same result when connecting via Ethernet.
Can anyone help please?
Thanks & regards,
Cliff
Brighton, UK

Its a network drive access it through the network pannel in finder.

Using Gigabit Adapter for intranet access, wireless for internet access

I have a PowerMac G5 I have been using with a built-in wireless adapter for a couple of years. I also have a Windows PC with a wireless adapter as well. Both of these access the internet over my AirportExpress connected to a cable modem.
I wanted to take advantage of the Gigabit adapter in the PowerMac for copying files directly between the computers, so today I installed a Gigabit card in the PC and connected the two through a Gigabit switch.
Unfortunately, I can't seem to get either the Mac or the PC to get valid IP addresses, let alone talk with each other.
Any idea what I need to do on the Mac to get it to use the gigabit adapter for intranet traffic? I am guessing whatever I do on the Mac I will need to also do on the PC.
Thanks!
Brian

What you're trying to do is called 'dual homing', and it's not really supported by OS X's automatic network configuration, though 'Internet Sharing' is close.
I'd avoid it if at all possible. Connect the computers and the cable modem to the Gigabit switch. If the switch doesn't have routing capability, you might need a router also, to provide DHCP and NAT services. This would save you a lot of grief compared to figuring out how to set up the Mac and Windows for dual-home operation.

Setup wireless for external hard drive?

I know that this is not mentioned in the manual at all, but I wondered if I would be able to set up my external hard drive to the AirPort Express and have it transmit those files wirelessly. It's annoying having to drag the external drive around and find a place to plug it in around the room if I want to listen to music and thought this could be a good solution if it was possible.
Basically I just want to know if it is possible and how I would do this really?

The AirPort Express can't use an USB drive, and can't stream content directly from a hard drive; an application actually needs to send the content to it.
(47714)

Best way to have internet only wireless network

Our current way of configuration for this is standalone ap's with multiple ssid's. The main network ssid's are on the 10.0.0.0 networks. The internet only ssid is on the 192.168.1.0 network. ( this is a wireless network only,no wired) They all get there dhcp address from a layer 3 switch. To prevent the wireless 192.168.1.0 intenet only network from getting to the 10.0.0.0 networks, we just put a simple source & destination deny acl on the in vlan interface of the 192.168.1.0 network on the layer 3 switch.
Now that we are impementing a Cisco 2504 controller, the management and ap manger are both on the 10.0.0.0 network.( both on port 1 with dynamic ap manager enabled) I can setup as many ssid's on the 10.0.0.0 network and they all work fine. But when I setup the 192.168.1.0 internet only ssid it will not connect. I'm assuming that its because the 192.168.1.0 network or anyone trying to connect and use that network has to go through the controller located on the 10.0.0.0 network. I'm thinking that the acl on the vlan interafce is the problem.
Please correct me if i'm wrong here on any of the above thinking. So, if I'm correct, what is the best way to setup a separate internet only network through the private networks? I'd appreciate any advice on this subject as I'm new to the lan controller way of doing things.
Thanks

So it should be working, you may need to disable proxy on the WLC. Controller > Advanced > DCHP and uncheck the proxy box.
If you do this, you need to make sure you have ip helper-address configured under the L3 interfaces
HTH,
Steve
Please remember to rate useful posts, and mark questions as answered

Configure SUP location for IBCM (Internet Only) Clients

I'm using ConfigMgr 2012 R2 with a single primary site. I have a second site server deployed in the DMZ configured
for Internet clients. I have a Internet MP and DP configured with SSL and they are working well.
I have a question about how to configure the SUP for internet only clients. I configured my internet facing SUP to require SSL and configured it for Internet and Intranet clients.
I installed the ConfigMgr 2012 client on my test machines with the CCMALWAYSINF=1 option to be connected internet only.
The clients are not getting a local policy to connect to the SUP and if I add the internet SUP in the local group policy myself it doesn't do anything. If I run the "windows updates" cycle from the Windows Update client (NOT
ConfigMgr) it seems to connect and sync with the SUP (WindowsUpdate.log) but ConfigMgr does not appear to recognize the SUP and doesn't point the clients to connect to it and upload the results.
Any Ideas how to force my clients to connect to the internet facing (IBCM) SUP to scan for required updates? Anybody deploy a internet SUP lately that can provide some guidance? Thank you very much

Check the log file(s) on the Internet facing site system. The easiest method to check the sync status is by going to the monitoring workspace in the console and then look at the
Software Update Point Synchronization Status node.
My Blog: http://www.petervanderwoude.nl/
Follow me on twitter: pvanderwoude

Possible to simultaneously use time capsule for backup + another router for internet?

I will soon be moving into an apartment in which my landlord provides wireless internet through her own router.
I also have my own Time Capsule, which I'd like to continue to use to back up my Mac via Time Machine.
Is it possible to connect to both my Time Capsule (for backup only) and another router (for internet only) at the same time?
If not, can anyone suggest a good workaround?

moskovit wrote:
I've done a little research, and it looks like I might be able to wirelessly daisy chain the two routers, using WDS (wireless distribution system), assuming my landlord's router supports it, but that this would drop the speed of the internet significantly: https://discussions.apple.com/thread/2623802?start=0&tstart=0
It works extremely poorly and the landlord would need to agree to it.. plus it would require use of WEP security which is hackable by children with internet hack kits in about 2min flat. Don't go there. Apple have made their products incompatible with most other routers. So any suggestion of a workaround will involve spending some money on your part.
You could buy a airport express and plug that into the main router by ethernet.. again if allowed. Your TC can do wireless bridge to another apple product very well. Messy but could work. It is not that expensive to get a second hand AEBS and use that. You don't need the latest products but wireless range would be better in the AEBS than AE.
So I'm still wondering: Is there another workaround? Is there a way to get my mac to connect to my time capsule (for backup) and another router (for internet) simultaneously, or is that just technologically impossible? If it's impossible, is there another solution?
You cannot wirelessly connect to two different wireless devices at once on one client. You need to either have a second wireless client in the laptop.. for instance a USB stick which can be fairly tiny nowadays. It is just you need to find one with Mac drivers. Or the TC must have internet connectivity. You could get that by buying a wireless bridge, and using that in your room, with the TC plugged into it. Universal wireless bridge devices are fairly cheap, but can be a pain to setup. Look for products that work with the main router and use as fast a speed as possible. It can be a tricky setup as you need the wireless bridge working on one channel and the TC working on another. What I am suggesting is the WDS solution you found but using two different boxes to do it. And not using WDS at all, unless the main router is suitable, but rather universal bridge.
The hassle of all that suggests to me,, I would go for the wireless stick, so your Mac laptop has two wireless clients.
http://www.ebay.com.au/itm/iMAC-MAC-Apple-Airport-G3-G4-G5-OS-X-USB-WIRELESS-CAR D-/290538112833?pt=LH_DefaultDomain_0&hash=item43a56bc741
I have no idea if this works just to show you what I mean. Please do research it yourself.
An ethernet connection to the TC is far superior solution albeit would require you to plug and unplug it.

PXE boot OSD connects to Internet-only Management Point. A bug?

So here is the deal: SCCM registers the Management Points to be used in DPs PXE in a Registry file, it is done in alphabetical order (or install order), so all PXE boots will always connect to the first MP (Microsoft, WTF?). In my case, the first is an INTERNET
ONLY MP, why would PXE Booted OSD connect to that? Brrr..
Solution is to edit the registry, put the MPs in the right order and then it works like a charm.. until some SCCM maintenance task overwrites it with the default MP list, including internet only MP as first.
MPs don't respect boundaries and I cannot just block the ports (OSD will be slow, it first tries to connect to the internet MP, times out, then uses the next one).
A) This behaviour is a bug. PXE Boot should NEVER connect to Internet Only MP (OSD is not supported for IBCM).
B) Does anybody know what maintenance overwrites the DPs registry key "ManagementPoints"?
I cannot just use one MP. All external MPs are configured for internet only, internal MPs are configured intranet only.
Ideas?

The distribution manager on the site server is the component that populates the MP list on the registry of DP/PXE.
Dist mgr currently writes all the MPs and does not filter-out the internet-facing MPs.
Even if you manually edit the registry on the DP, dist mgr will over-write it the next time it updates the DP. You can try to put an ACL on the registry key which prevents the site server from updating it. However, the DP will never get updated by the site
for other things.

Use Airport Express as Internet hub, bridge Time Capsule for N-only?

OK I checked on the forums, but I could not find anything quite specific it what I was trying to accomplish.
I recently got a 500GB Time Capsule. I changed my network around, which was based off of two Airport Express stations – on in the office hooked up to internet & printer, one in living room hooked up to sound system – and made the TC the main hub, connecting modem to it's WAN port and bridging the office AX via LAN port in bridged mode, sharing the living room AX as WDS. This way, I had the TC in N-only mode in 5ghz spectrum using wide channels for fastest performance. All this worked well.
Except that I noticed that with the TC in the office – where the laptops rarely are – my data transfer speeds were no better than .11g speeds. So I mucked around a little, and noticed that it really was just the case that the separation of distance & obstruction was slowing the transfer speeds over .11n-only that much!
Well, it occurred to me that there may be another way. What I had intended to do was to hook up the modem back to the office AX, move the TC to the living room where it'd be "line of sight" to the laptops most of the time, and bridge the TC and living room AX over LAN. So the idea was to keep the networks separate wirelessly still, and have the internet "bridged" wirelessly from the office AX to the living room AX and then over LAN to the TC. The thinking was that the hit on the internet connection would not be noticeable as the threshold for that is well below the streaming capabilities of the AX network still, so I'd not lose anything there, but gain MUCH faster speeds with the TC in line-of-sight of the Laptops (3x as much in testing; with TC in office and laptops in living room, 1.3gb folder took 9 minutes, same folder line-of-sight testing took only 3 minutes).
However, I CANNOT get this to work properly. I thought I really just needed to move the TC to the living room and bridge it there, as the services should be shared over the LAN port since the 2.4ghz AX are in "bridged" mode, but that didn't work. I kinda-sorta got it to work by forcing both the AX network AND the TC network into "bridged mode," but that didn't seem right or wise, so I tried some other settings, putting the TC to bridged and having the office AX distribute IP addresses, but then it wouldn't show up under restart, and I'm just confused now on how to set that up!
What i need is: To have the "Office AX" hooked up to the modem & printer, on 2.4ghz since it's the older .11g model, with the "Living Room AX" on that same network. Then the TC in 5ghz N-only bridged to the Living Room AX via LAN, so it can share the services (internet & airtunes) and still get high data transfer speeds to the laptops via the advantage of Line-of-sight, non-obstructed networking.
How do I need to set this up? It's possible, right?
Message was edited by: Anthony Caltabiano

OK while I was working out this morning, I was trying to think of WHY my setup wasn't working. I had an epiphany, and decided to try once more. This time, it worked.
The problem was that originally I had the Living Room AX set up as a Remote, so it was hooking INTO the network, not extending it. I know that with that setup you can't hook up to THAT station and get internet or anything, you hook into the MAIN station and you can SEE the remote's services that are "plugged in" to it.
I didn't think this would be an issue with the TC physically attached to the ethernet port, but apparently this behavior extends to the ethernet port on remote stations for internet access... I had a feeling that MIGHT be it, so I started from scratch, and this time set up the Living Room AX to extend the network instead of just joining it. Then hooking up the TC to the Living Room AX's ethernet port and selecting "Bridge Mode" on the TC got me the good ol' green light!
So, if anyone out there is trying to build a dual-band network, with their TC on .11n-only and bridge to services supplied by a 2.4ghz network, AND route their internet access through the 2.4ghz network instead of the TC so that they can keep their TC more centrally located for better performance... make sure you do it like this: Set up the alternate (2.4ghz) network as relays, "extending" the network, so that when you plug into it, the TC essentially thinks it's plugged directly into the main router, no matter where it is. The throughput hit for internet access over WDS shouldn't be a problem for US-based peeps, as our speeds are typically well below the .11g threshold anyway.
I also found that it helped to NOT hide the SSID of the 2.4ghz network; doing that kept rendering failed attempts to force the secondary AX to join as WDS. Once I redid it without hiding the SSID, all went well.

Can i use new TC to connect wirelessly to home network and plug my tv into the time capsule for internet connectivity?

My new tv needs to plug into an ethernet port for internet connectivity.
I'm hoping it can plug into my TC however my TC is wirelessly connected to my current home network... how can i get this to work?
TC version A1470 (i think, brand new)
Many thanks.
Ben

If the TC is connected to a wireless network provided by another Apple router, then the TC extends the network by default, and the Ethernet ports are enabled on the TC.
If the TC is connected to a third party network wirelessly, then it must have been setup to "join" the wireless network. When the TC is set up this way, the TC becomes a wireless hard drive and nothing more. The Ethernet ports are not enabled when the TC "joins" a wireless network.
So, a logical first troubleshooting step would be to confirm "how" the TC is currently set up. To do that.....assuming that you are using a current or recent version of AirPort Utility on your Mac.......
Open AirPort Utility
Click on the TC icon, then click Edit in the smaller window
Click the Wireless tab at the top of the window
Check the setting for Network Mode and report on that

Setup Wireless for internet only

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