2 Macs on cable modem network

Hi!
I have a MacBook Pro and a MacPro in my studio. I am getting my internet through a cable box from Cox Comm., connected to the DLink DIR-655 router. The laptop connects wirelessly, and the MacPro gets it through the ethernet cable from the router.
I am trying to make them "see" each other on the network, so that I can transfer files back and forth, but I really can't figure this out. When I do Go > Connect to server, each computer shows up OK, but when I double click it, it says "connecting..." and nothing happens at all. Is this has something to do with file sharing? PLEASE, any advice would be greatly appreciated! Thanks!!
Rad

I just found this:
"If your Internet connection and your local network use the same port (Ethernet, for example), investigate possible side effects before you turn on Internet sharing. In some cases (if you use a cable modem, for example) you might unintentionally affect the network settings of other ISP customers, and your ISP might terminate your service to prevent you from disrupting their network."
This does not really help the average joe set up his sharing over cable modem Still, any info appreciated!

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Back to my mac and cable modem

I can't find a definitive answer to this question. Is there a cable modem that is compatible with Comcast that supports Back to My Mac?
Right now we have Comcast for business with fixed IPs, so I have just been using afp:// and vnc:// to access my home mac while on the road. But in the interest of saving $$$, I want to switch to Comcast for home, which doesn't offer fixed IPs.
The last time I tried (with Mavericks), I could not connect to any computer at home through Back to my Mac because the Comcast-supplied modem didn't support Upnp (Universal Plug and Play). A brief search could not find any cable modems that do support Upnp. Am I missing something, or should I give up on the idea?

Is there anyone out there who uses Back to My Mac (for sharing files and screens) and a cable modem? If so, how well does it work? Did you get a special modem or just the cheapest one that you could find?

Mac causes cable modem to reboot/reset

I have a MacBook connected to a D-Link DGL-4500 router via 5GHz 802.11n. The DGL-4500 is connected to my Ambit cable modem (Roadrunner is my ISP.) I have various other devices hanging off of the router, including an Airport Express (for Airtunes streaming.)
Whenever my MacBook connects to the router, or otherwise gets a new DHCP address, it causes my cable modem to reboot/reset, which knocks down my Internet connection until the modem comes back up. This happens every time I wake the MacBook from sleep. It also happens if I switch from wireless to wired ethernet, and it also happens if I take the router out of the picture and connect the MacBook directly to the cable modem.
None of the other devices on the network cause this to happen.
Any suggestions on where to look to try to figure out what it is about the MacBook that my cable modem doesn't like?

You should complain to your cable company; nothing a network device can do should affect the cable modem like that, and I'm not sure what has to be done to update the firmware on a cable modem (it's likely pushed from the cable company side.)
The cable company may also be able to provide you with an alternate brand of cable modem.

Trouble with Mac and Cable Modem

Every time I turn on my Mac I have to reboot my modem. I have to unplug every cable and leave for a few minutes before I can hook everything back up. Sometimes I even have to plug my modem into a different cable outlet to reset it. Is this an issue with my internet cable provider or do I need to adjust a setting on my Mac. This is has become very aggravating and any help would be appreciated. Thanks, Ben.

I am having the same issue I think. I have a Motorola hooked up to my Airport Extreme. The last 5 mornings I haven't been able to access the internet. Yesterday I went and checked the lights on the front of the modem and noticed that only the top 2 were lit- the third one blinked. So I reset the modem. Worked fine the rest of the day. This morning I booted up my MBP and same thing. Looked at the lights- the third light is just blinking. Called Comcast and they checked. Said my modem was 'offline' and not connecting. Said that it had gone bad- I suspected so. Not too long ago we had to replace the old Apple router with a new one so I was guessing that the modem was bad and they confirmed it. So I will be shopping for a new one. FYI- reset the modem again this morning after talking to Comcast and it's working fine. Just thought I'd chime in. Judy

Slow Cable Modems - Everyone Please Read

I am a Broadcom employee. Broadcom makes cable modem chipsets. Some of these chipsets have a slight design flaw. I am not at liberty to divulge any technical details. However, I can tell you that using a cable modem containing one of these chipsets with your Mac will result in slow internet speeds. Apple is not at fault. I'm sorry to say that fixing these design flaws, which only affect Mac users is not a priority at this time.
I am a Mac user myself and am just as frustrated as you are with incompatible products. This is why I am coming forward and informing you of this problem with our products. Our chipsets are used in almost all of the most popular cable modems. I am including a partial list of the most recent and popular cable modems that use our chipsets which have this problem. I am unable to find any information about older and less popular cable modems. Please understand that I can not and will not divulge any more information. Thank you.
All Linksys Cable Modems
All Motorola Cable Modems except for the SB5120
All Scientific Atlanta Cable Modems

Maybe Broadcom can answer the question as to why the Cable modems are slower with Macs with cable modems that do not have TurboDOX.
I have spent hours on numerous forums reading many users complaints and many users solutions from changing DNS to using certain modems.
What I have found is this. All and EVERY cable modem that people have references as working at full speeds on a Mac had 1 thing in common. This 1 this is TurboDOX. I have just completed about four locations where the Macs were slow with Comcast Cable modems. The latest being today with a new installation with a new SB5101 modem. I had the client go and buy a new SB5120 instead. The speed with the 5101 was 2-3Mbps and the speed with the 5120 was 18Mbps!!! yes, 18.
So the question is Why does TurboDOX make a difference with the Mac and not the PC????
Also, another thing to note is that some routers cap the WAN to LAN interface at 6Mbps. For example, the COMSUMER grade Netgear routers (usually the silver plastic ones) are capped at 6, however the Business class routers have varying WAN to LAN speeds ranging from 15Mbps to over 50Mbps.
Our setups for residential clients include either the Netgear FVS114P or the FWG114P VPN Firewall Routers. I have had no issues with Macs being slow with either of these routers and a Motorola SB5120.
FWIW.
And about the Design Flaw theory, Why did this speed issue just start appearing recently? I saw a site test fine at 6Mbps when it first was installed then recently when we went back to do some work find it testing between 1-3Mbps. Just Odd.

I am using several Macs running Yosemite. I was recently "upgraded" to Xfinity's new cable modem which can support both 2.5Ghz and 5Ghz networks at the same time. Actually I can connect to the internet over both with a satisfactory bump in speed for

I am using several Macs running Yosemite. I was recently “upgraded” to Xfinity’s new cable modem which can support both 2.5Ghz and 5Ghz networks at the same time. Actually I can connect to the internet over both with a satisfactory bump in speed for the Ghz. However when I connect to the 5Ghz the Time capsule disappears from the Airport Utility and claims to be Not Found. Is there something I have done wrong or just a Yosemite Teething Problem

First restart your mac and try again.
It could be
that the router and the TC are interfering wirelessly with each other.
You can check this by pressing the option key while clicking on the wireless icon on your screen
Open Wireless Diagnostics
enter your user password
Press CMD 4 then Scan
You will see all the wireless channels being used in your location and you can check if they are on the same channel
Make the SSID for the TC simple like MyTC
Set 5Ghz to auto
Update the TC
Try again
Ted

WRT54GS with Mac OS 10.6.8 and RCN cable modem not working

Hello,
I have a Linksys WRT54GS, version 6 with Mac OS X (version 10.6.8) hooked up to a Scientific Atlantic cable modem, with RCN as the ISP.
Recently, RCN had some network issues, and so I had to power down and reset my modem. The modem is working fine now -- no problems at all when the Mac is connected direclty to the modem.
The router's network is OK in that I can connect the Mac wirelessly to the network, but I can't connect to the internet through the router (through neither the wireless or wired connection).
I have downloaded the latest firmware update for the router, following the Linksys site instructions, but this has not helped me solve the problem.
Does anyone have any advice as to what I should do? I did call Linksys tech support on the advice of RCN, and they said that the router does appear to be working (power, WLAN, and Internet lights are on), but they would be charging me nearly the cost of a new router to fix the problem.
Any advice would be appreciated!

Since you upgraded the Router WRT54GS with the latest firmware so once reset the Router and power cycle the whole network… Then connect the Modem with Linksys Router on the Internet Port and then connect any one computer to any one of the Ethernet port on the Router [Numbered – 1, 2, 3 and 4]… Let me know the RCN connection is a DSL connection or cable connection…
So if you have a DSL connection you can refer to this link:
http://www6.nohold.net/Cisco2/ukp.aspx?pid=93&login=1&vw=1&app=search&articleid=4020&userrole=Linksy...
So if you have a Cable Internet Connection you can refer to this link:
http://www6.nohold.net/Cisco2/ukp.aspx?pid=93&vw=1&articleid=3686
As far as the wireless is concern:
# Open up the browser and on the address bar type 192.168.1.1 that will open up the Router setup page…
# Then Click on wireless Tab create the Wireless Network Name SSID and select the channel to 6, 9, and 11… Click Save Settings...
# Then Click on Wireless Security sub tab and select the security mode and provide the password as per the requirement… Click Save Settings...
After doing the settings try to connect the preferred network on the wireless devices and check the connectivity….

Why has my native windows 7 Pro-64 network to a windows 7 Pro-64 VM has slowed to a crawl and freezes, after the new Arris cable modem was installed?

Please appreciate the details, so the complete situation can be visualized:
The office network:
New Mac Mini PC running Win 7Pro 64, (in boot camp), networked to an iMac running the same Win 7 Pro 64, VM, UNDER Fusion 7Pro.
To review: My treatment rooms former dell PC/running vista business/ running the server and network versions of my Dental practice mgmt & X-ray capture apps, had no probs WLAN to the front desk iMac running the same PC client dental network apps under the same vista business, & Fusion 4. The dell slowly fried its power supply .
I could not wait to replace it with a Mac mini/ boot camp/ win7 pro 64 bit, as it has to run natively to capture X-rays. The front desk iMac was also upgraded to os10.10.3/ Fusion 7pro/ and its own matching Win7 pro 64bit. The iMac is wired and WLAN connected to a netgear d600 router and a Time Warner Cable modem. The modem then failed and was replaced by an arris modem. As the Arris was configured out of the box, the network ran much slower slowed, as compared to the original modem. BUT- The Vonage 2 line phone system stopped working- no incoming or outgoing voices could be heard after it rang. Then twc remote configured it and the phone now works, but the network iMac slowed to a crawl, and now freezes when accessing the Mac Mini PC dental server to edit or enter data. The Mini perfectly accesses the internet via wifi. It accesses the front desk canon printer by wifi, and can print share they the iMac that is wired to the printer, as well, BUT, the network connection is a spinning pinwheel. The front desk imac easily finds the Mac Mini PC server on the network. It connects easily by entering the servers IPv4 address SHOULD THAT last value change. But if data isn't entered in slow motion, the window and app freezes, and has to be force quit by Task Manager!
Cause:
1. I think TWC switched the cable modem from the default- Non Bridged, to Bridged mode. Could this be the cause?
2. The network setting in fusion, on the iMac is auto detect, a setting that always worked with vista and with the new Win7 system, before TWC installed the new arris modem. 3. Switching to NAT does not work at all is there a different setting to use?
3. Does the Netgear Router have to have a port or pref configured so as not to block the Server.
4. might in need an Access Point (I have an extra netgear wdr3400) ).
5. Do I need an Extender that plugs into the AC LINE?
I hope this info helps.
PS:(some addtl info:
1. File sharing works fine between the minis -Mac and boot camp sides and between the iMacs- Mac and VM sides and between eother side to or from either of the 2 computers! 2. Also either office computer and all of my my home macs , (& my iPad, & iPhone), can access each other instantly and flawlessly, with splash top streamer and jump desktop remote apps, as controller or as client! In fact, the front desk iMac can remote control the mini PC AS IF YOU WERE DIRECTLY ENTERING INFO I TO IT!
SO I think it's either a misconfiguration in the TWC cable modem &/or some additional pref to config in the router? Thanks so much for your help, (been using VM's since VPC1. & Win95 in a iMac, 1999, DV MODEL! (TWC BLAMES VONAGE FOR NOT OPENING SOME PORTS IN THE TELE MODEM. Vonage blames TWC FOR NOTopeningj ITS PORTS IN THE CABLE MODEM, when they meant the ports on the Netgear. They have passed the buck for 6 weeks with not even a guess at what to do. VERY FRUSTRATING! Again, thanks to all!

Okay Saint Steven, I'll bite:
I read your description multiple times, very carefully, and I am still confused. May I suggest the following:
* Follow basic troubleshooting procedures. Isolate each individual problem. Don't try to get everything working at once. Make one change at a time.
* If I read your description correctly, the Netgear D600 (??) Router is the office LAN (not WLAN). Connect each piece on the LAN separately one-by-one, and test each piece individually. Get your LAN and its devices working first. Forget about the Vonage and the Arris Cable modem.
* Next, look at your Internet connection. Again, try each piece separately. Depending on how the original cable modem and the new Arris cable modem are configured, you may also have to adjust the configuration of the Netgear D600 Router.
* Finally, if you are still having problems, try to organize your thoughts and presentation before you post again. List each element in your network. List how each element is configured. Be systematic.
"Arris cable modem" does not help much - some are simple bridges, others are routers, etc.
To answer your questions:
1. I can't tell from your confusing description, but I don't think so. It seems like the problems are associated with the system changes you made (replacing Dell, etc.) and the problems seem to be isolated to the local LAN.
2. Auto detect should work, but it is easy to change and test, as long as you change one thing at a time.
3. No. The Netgear router should allow all communications on the local LAN. Could you have put the "server" in the DMZ?
Note: I could not find a Netgear "D600" model in a web search. Do you mean N600?
4. No. I doubt that you need an additional access point. Based on your description, everything appears to connect to the LAN.
5. No. See 4.
To repeat myself:
* Do careful, systematic troubleshooting.
* Provide carefully written, detailed description of your network and system configurations when you ask for help.
Good luck!

I need help setting up a wireless network and getting connected to the internet. I have a RCN cable modem now and tried to install a wireless linksys today and it was a disaster

I have a MAC desktop and RCN cable that I have internet through now. I tried to set up a linksys wireless router today and could not get the network settings right, or figure out how to create the network, or get connected. I was successfull for only a few minutes because my phone and laptop had picked up the signal. However my desktop still would not connect to the internet. I had to restart my cable modem after because even after returning to directly inserting the desktop to the modem I could not get on the internet. I am able to get on now but would like to have wireless for my laptop and phone. Do I have to have an Apple router? Are there any easy steps I can take to set up a network without doing any damage to my desktop? I am so lost and have been getting pop ups and even my time changed.
Please help a new person to Apple!

why dont you go to linksys.com/downloads and get the quick install for your adpter

I receive a not connected to the internet message several times daily on my iMac connected via airport to a time capsule which accesses the internet via cable modem.. When I input my password to enter network preferences, the connection re-establishes.

I receive a "not connected to the internet message" several times daily on my iMac connected via airport to a time capsule which accesses the internet via a cable modem. Software/firmware is up to date on the iMac (OSX 10.6.8) and Tme Capsule(7.5.2). Browser is Safari 5.1.
When I input my password at the prompt to enter network preferences, all the lights go green (ie... ethernet, ISP etc.) and the connection re-establishes immediately and states "the connection appears to be working normally".
It more of a nuisance than anything and seems to have started ocurring over the past couple of months. I also have a windows XP box also connected to the same cable modem that I never have internet connectivity issues with. I've verified all the physical aspects of the connections and can't see any evidence of any actual drops in the modem logs. I suspect it is just an intermittent communication loss between the Imac and the Time Capsule, but I am not very familiar with Mac equipment yet.
Just wondering if anyone has experienced a similar problem and what you did (if anything) to resolve it?
Thanks.

The AirPort Express will connect to your existing wireless network if the network is using WPA2 Personal or WPA/WPA2 Personal wireless security settings.
So, it can join the network as a client and then provide an Ethernet signal to your Time Capsule.
Be sure to configure the Time Capsule to operate in Bridge Mode so that it will be operating on the same network.

Cannot see Mac Mini Server from Internet: DynDNS alias gets thru cable modem to wireless router, not to the Mac Mini. How to configure?

I want to make my Mac Mini Server (Lion) visible to the Internet from my home LAN. I have followed the Lion server install wizards and also set up a dynamic DNS at DynDNS.com.
When I enter the Internet address with the proper alias from a web browser, I get dumped into the admin screen of the Linksys wireless router WRT300N. Hint: the WRT300N provides DHCP for the LAN, not the cable modem providing DHCP. The WRT300N has DDNS service set up. NAT and RIP are disabled. The Mac Mini DHCP is reserved.
Suggestions? I could use the Motorola Surfboard SB6121 to provide DHCP but have hesitations.
Point me to the right discussion/article and get me back on track, please.

This sounds like a simple port forwarding issue, but I don't understand your LAN setup.
The WRT300N has DDNS service set up. NAT and RIP are disabled.
The chances are, you're running NAT somewhere in your network. If not the WRT then what? If it's your cable modem then you must have port forwarding configured on the cable modem, and that's where you need to focus - change the port forwarding to point to your Mac Mini's address rather than the WRT.
HOWEVER, it is far more common to have the wireless router perform NAT and DHCP, which is why I question your setup.
Not directly related, but:
The Mac Mini DHCP is reserved
Nix this. Your server should be configured manually, with a static IP address, not DHCP, even with a reservation in the DHCP server. The only advantage of DHCP is for dynamic hosts (hence the 'D' in 'DHCP') or if you expect to change your entire local subnet on any kind of frequent basis. The reality is that you can't just change the IP address of Mac OS X Server like this - there are too many dependencies, so it's better to set it manually, knowing that there's a cost (and pain) to change the server's address.

HT2497 Using Time Machine for home wifi just fine. Switched to cable modem from DSL. Now having trouble connecting laptops to wifi. ISP says it is not their fault. Mac books won't connect on their own.

Changed from DSL to cable modem. Now Mac book pro won't connect to wifi - Time Machine?
One Mac ok, other not. Help?

Thanks. We have been using an existing Time Machine for wifi. Cable modem replaced DSL router and was hooked up to Time Machine. What's odd is that 3 computers and iPad2 are connecting to home wifi just fine, using exact same network and password as before. My Mac book pro and an older iPad are not. IPhones are also connecting to home wifi just fine. I managed to get my Mac book pro hooked one time by copying ip address from a Mac that was working (entered manually) then turning that one off. That's not what I need.
The error message is "no ip address".

Multiple routers/networks on one cable modem

Hello everyone:
I've been reading around on the forum trying to find the answer to this question, but have not found any specific answer that satisfies all my requirements. A more in-depth explanation.
I have 1 IP address via cable modem. I want to configure two wireless routers each with different SSIDs. The main network would be an Apple Time Capsule and would be the parent’s network. I would connect an AppleTV and the second router (Linksys WRT-310N) to the LAN ports and the parents’ phones/tablets and an Airport Express extender wirelessly. The second router would provide a distinct wireless network, have a DVR, network hard drive, and blu-ray player connected to the LAN ports and the kids’ handheld devices and a wifi printer connected wirelessly.
Ideally, both networks would use WPA2 security and the parents’ computers, a Mac and a Win (the Win running Network Magic Pro) could manually switch between networks as necessary.
Can someone please tell me if this is possible? I think it is based on my research, but specific details about how to do it would be appreciated.
EQUIPMENT
Modem: Motorola SurfBoard SB6121
Router 1: Apple Time Capsule
Wireless Extender: Apple Airport Express
Router 2: Linksys WCG-310N

The new modem is configured to only hand out one public IP Address. Nothing you can do but call them and try to get a higher level tech support.
Please remember to Kudo those that help you.
Linksys
Communities Technical Support

Back to my mac doesn't work with Cable modem

I have at home Cable modem and a Airport Extreme, both use NAT to distribute internet, so it seems even if I connect the cable modem direct to my home Mac (without the Airport) that the Back to my mac doesn't work. Can somebody tell me how can I turn around this problem? Doesn anybody has it too?
The Back to my Mac panel displays this message when I have the Airport Extreme distribuiting the Internet: Back to My Mac isn't working properly because you may have more than one device on your network providing Network Address Translation (NAT). Try disabling NAT on one the devices.
And without the Aiport: Back to My Mac isn't working properly because it requieres a router that supports NAT Port Mapping Protocol (NAT-PMP) or Universal Plug and Play (UPnP). Make sure your router supports one of these protocols and that it is enabled.

If I may continue this thread, I have the same double NAT issue and am using a DSL modem/router combo. I added an Airport Extreme to my Qwest supplied Actiontec dsl Modem/Router in hopes it would solve issues with Back to my Mac, among other things. The dsl modem supports UPnP to some degree, but BtmM doesn't seem to like it.
Currently the setup uses the DSL modem/router first in line, functioning as modem, NAT, router, but no DHCP (or wifi). That plugs into the WAN port of the Airport BaseSta. The Base Station runs in bridge mode, and distributes the ethernet and wifi connections. I would rather bridge the modem and disable its router functions, and let the Airport handle NAT and routing and wifi and Back-To-My-Mac.
What are the alternatives? Any help appreciated!

Accessing home mac fromwork through a router and cable modem

Hi - i'm really struggling with this - spent hours looking around net finding out how to set this up and as far as i can tell i've got it all set right - however it refuses to work.
I want to be able to access files on my home mac from work. Various ways of doing this i have read is SSH (or SFTP - Remote login) FTP Access or personal file sharing - tried them all can't get any to work so problem somewhere.
Have an NTL cable modem wired to a Netgear RP614 router which has Ip address A.A.A.A on its WAN port. It has B.B.B.1 on its LAN port. I have an airport base station acting only as a wireless access point (ie DHCP is turned off) router is allocating IP addresses - my ibook has B.B.B.3 - but have reserved this address for my iBook, ie it is as good as fixed as the router always gives my iBook this IP (using MAC address). Have port forwarded all necessary ports on the router, 22, 20, 21, 548 to B.B.B.3. Apple firewall is switched off - what am i doing wrong? I have also set the router to link to a DynDNS service to update its WAN IP everytime to my domain name i have set up.
If i try to FTP with transmit or fetch it doesnt work, if i try SFTP with fetch or transmit it doesn't work, and filesharing via connect to server doesn't work.
What am i dong wrong? How come everyone else can get this working but i can't?
cheers!!!

Right i tried my iBook connected directly to the cable modem and everything works then! Although one thing i did notice is that in the sharing windows in preferences at the bottom where it tells you how to connect to that particular service it didn't report the Ip address it reported a name - something like bcu-cu-cust36-bag-ntl.com - however when i looked this up it did resolve as the IP address reported by my network preferences.
So i'm not quite sure whats going wrong here - i'm gogin to try taking my airport base station out of the equation and hard wire my laptop to the router and see what joy there....

2 Macs on cable modem network

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