Securing Internet Connection on Internet Gateway Router

Hi,
I am looking for some suggestion as to how many different security features that should should be implemented on IOS based Internet Gateway Router.
What are the different ways hackers attack, DoS attack, Worm Attack can be prevented on IOS routers.
I know it is a broad question, but a list of essential measures on IOS would be helpful.
Fawad

Hello,
I would recommend:
-Stateful inspection
-uRPF checks
-ACL's
-Connection limits
With that you will cover the essentials but of course as you know you need way more than a device to protect a network.
Regards,
Julio

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WRT54G3G-ST router - no internet connection - can't reset router

Hello. Definite longer story definitely not short (I apologize for the rambling length... I don't know what is and isn't important, so scan at will, please... I am sorry...): Recently my computer (Dell XPS 400, Windows XP Service Pack 3, Internet Explorer 7 with phishing filter and pop-up blocker on, SiteAdvisor, up-to-date McAfee Virus Scanner and Firewall, and a Linksys Wireless-G WRT54G3G-ST router with its power adapter plugged into the wall electrical outlet and a network cable from it directly connected to my computer.) got a drive-by Generic.dx trojan without me downloading anything from one of the few sites I visit daily. My internet connection crawled, and I now have no connection at all.
I've been getting help from McAfee forums very helpful and quick good volunteers... They recommended Malwarebytes Anti-Malware to me, which I downloaded from my second clean computer (a laptop) to my flash drive, then to my infected computer. I ran it, tried updating it as recommended, and only then discovered the trojan killed my broadband entirely. I scanned with it anyway, and it quickly found and removed/quarantined 11 Adware.MyWebSearch related files, but nothing else. They then gave me a link to an offline updater patch file, and told me scan in safe mode until nothing else was found and check if it fixed my lack of broadband access. Which I did, Malwarebytes found nothing else, but unfortunately I still had no broadband.
Next, they recommended WinsockXPFix. Which I ran and it made all its registry changes OK, I rebooted as required but still no broadband unfortunately. Did using WinsockXPFix make things worse for me with the registry changes it made? I used its registry backup to save the pre-changed registry files prior to running. Should I revert back since I still have no broadband connection? The McAfee volunteers then kindly told me I needed to hard reset the router, though I've tried countless times with no fortune. I'm at a definite loss as to what, if anything, I can do to hopefully get my broadband back, please...
It's very confusing with the numerous different variations to reset routers, and what I need to do for my router model (Variations: Unplug this cable/adapter exactly where, or not; hold the reset button between 5-30 seconds; rebooting the computer, or not; waiting 1 or 2 minutes between various steps, or not - and for all of these at what exact point in the reset process.).
I reset it once before with the reset button, routers page at http://192.168.1.1, default admin password, then changed it for security, etc; but this time I can't get it to work. I'm happy as can be to try again, to get a walk-through maybe, anything please... When I go to http://192.168.1.1 now, or any other address, Internet Explorer gripes at me that I'm offline, which is annoyingly correct. I don't have, and never had Zone Alarm, but disabling my McAfee Firewall doesn't help. IPCONFIG at the Command Prompt gives me a Windows assigned address of 169.254.X.X
I was going to use the routers Setup Wizard CD to try to reset the router, and if that failed to try to get its firmware version number to maybe upgrade. But I was going to ask here first for expert advice since I've read many things that can go wrong while upgrading firmware. However, scanning the CD (Without running the CD.) McAfee found the virus W32/HLLP.Philis.ini in the file "D:\_desktop.ini" on the CD. McAfee didn't delete the file, I don't know why.
   I scanned my entire computer several times and no infections were reported. I uploaded the file several times to both www.virustotal.com (39 online virus scanners), and virusscan.jotti.org (20 online virus scanners) and every time every virus scanner reported no possible infections. Is my up-to-date McAfee virus scanner reporting a false positive and yet Jotti and Virustotal's 2 McAfee scanners report the file as probable clean? Is "_desktop.ini" a legitimate Linksys file? I found no information on Linksys/its forums about it. My problems just keep multiplying...mentioning of more problems...
Finding that suspect file on the CD I decided to instead download the Setup Wizard from Linksys
(Router product page: http://www.linksysbycisco.com/US/en/support/WRT54G3G-ST/download
Actual file: http://downloads.linksysbycisco.com/downloads/WRT54G3G-ST_SetupWizard_4_2_06042008.zip)
to my flash drive, then to my infected computer that is connected to the router. I ran it (Downloaded file version: 4.2.0.007 - Original CD Setup Wizard version: 4.0 printed on CD front.) and it immediately gave 1 of 3 options: Mobile Broadband Only, Broadband WAN Only, or Broadband WAN and Mobile Broadband. I don't know what damage, if any, I caused by continuing.
   It looked like it was trying to go through the entire router setup process. I thought it would take me to some options to reset the router, as I've read in the User Guide and elsewhere - that was my understanding. The setup process stopped at only 30% done "Router not found, please make sure the router is properly connected and try again." How much overwriting of original router setup files did I do by continuing? I'm entirely confused. Doesn't the Wizard check if the router has been previously setup prior to setting it up again? Did the version difference cause my router to not be detected by the Setup Wizard? Did the Generic.dx trojan that killed my broadband trash my computer settings so bad that my router is undetectable/essentially not setup?
Update of sorts: I tried one last time to reset the router, and I unplugged/plugged the network cable. Doing that I still had no broadband on my main usage Dell XPS computer that's connected to the Linksys router. However, my laptop, with Data Card in the router, was for the first time able to find the network - the constant connection and speed is brilliant, it's what it allways has been on the laptop (Since the trojan/router problems, my laptop only had broadband with the Data Card in the laptop.). Maybe the network cable simply wasn't re-connected properly/entirely during 1 of the many reset attempts, it indeed could also explain the downloaded Setup Wizard not being able to find the router/only getting 30% done.
Laptop Command Prompt IPCONFIG /ALL with Sprint Data Card inserted in laptop computer slot:
IP Address    = 174.158.XX.XXX (Sprint)
Subnet Mask = 255.255.255.255
DNS Servers = 68.28.90.91
                         68.28.82.91
Laptop Command Prompt IPCONFIG /ALL with Sprint Data Card inserted in router:
IP Address    = 192.168.1.1XX
Subnet Mask = 255.255.255.0
Default Gateway = 192.168.1.1
DHCP Server      = 192.168.1.1
DNS Servers      = 192.168.1.1
Since my laptop started working with the Data Card in the router I haven't tried again to reset the router, nor have I tried the downloaded Setup Wizard. I don't want to mess anything up further than I have(?) / the trojan has, and I need some expert advice, please, as to which of the 2 if either I should do (first?). On my laptop computer only, typing http://192.168.1.1 in Internet Explorer gets the pop-up for username and password, but I haven't proceeded. I've read you shouldn't reset the router and/or(? Is it both or just 1 please?) upgrade the firmware unless the computer is directly connected to the router - which my laptop is not. On my other computer that still has no broadband, Internet Explorer still tells me I'm offline when typing http://192.168.1.1 into it. My IP Address on it is still a Windows assigned 169.254.X.X and a Command Prompt PING 192.168.1.1 returns with "Destination host unreachable.", as it allways has and same with all other addresses (Except for 169.254.X.X).
Annoying 2nd "update" of sorts, apologies for length, as allways: I've been so focused on the trojan/broadband killing that I've cluelessly largely forgot that I have dial-up with AOL. Trying AOL dial-up also does not work, the insanity thickens... AOL software tells me to check my connection, but all phone cords are plugged in as should be. I plugged a phone directly into the wall outlet and I get a dial tone, I can call out OK, and the phone rings and gets calls OK. Device Manager-Modems-Properties-Device Status says the modem is working properly, and Resources Tab shows no conflicts. Diagnostics Tab's Query Modem looks OK to me, as does the log, but as allways I'm definitely no expert. I didn't change any settings anywhere.
   I have noticed off and on that checking IPCONFIG it says my IP Address is 192.168.1.100   It lasts maybe a day (then goes back to 169.254.X.X), maybe longer, I don't know - I don't check that often to pin it down (Should I?). During this time neither my broadband, nor my dial-up works. I can PING 192.168.1.100, but nothing else. I'm convinced the evil trojan killed both my broadband and dial-up - I've never had a problem with my Conexant D850 56K V.9x DFVc Modem prior. Also, I'm not convinced the trojan is not still lurking everywhere on my computer, I think it is...
Any and all help in restoring my broadband/dial-up is greatly appreciated, please... Thank you!
Solved!
Go to Solution.

Hello. It's been entirely too long since I've replied, I'm sorry. There's no excuse, and it's terribly rude of me... You took the time to read and reply to me, and I endlessly appreciate that indeed. I apologize for my long delay, I'm sorry...
After I left my message I downloaded many virus/spyware scanners, etc. from my laptop onto my flash drive, then my other computer for some needed thorough deep scans. One that I downloaded was Network Magic, which somehow, someway fixed both my broadband/dial-up internet on my main computer that's connected to the WRT54G3G-ST router. I don't know what/how it repaired my connection, but the broadband connection/speed has been working brilliantly since... Network Magic worked for me, and I highly recommend it to everyone who has stubborn complete lack of internet problems (caused by trojans at that) as I did. There's no guarantee it'll work, but it did for me to my amazement.
Network Magic, as is Linksys, is owned by parent company Cisco. Respectfully to all the good knowledgeable experts here (Which clearly I am not.), I don't want to tread out of my bounds. I'm simply trying hopefully to be helpful and save some headaches for both you the volunteers and the users...buying a new router and/or computer was on my mind, with all due respect I recommend suggesting to try Network Magic to users if resetting the router/all else fails, please. I did use WinsockXPFix/WinsockFix utility prior to using Network Magic, I don't know if that matters.
I also upgraded my McAfee package, I installed over my old software instead of uninstalling first, which caused errors in the virus scanner of all critically needed things. I have it installed properly now, but it did cause quite a delay in re-focus of my time. Some of the virus scans also found many trojans, some were the same/in the same folders that killed my broadband - which stopped me in my tracks to insure uninfected cleaning.
That definitely doesn't entirely explain the long lapse of time, and I apologize for that, again. It's just that I'm trying to be cautious and slow in all this. To answer the first very good idea you made: Unfortunately, there's no place on my other computer to plug the router in to, which all the more so caused frustration (at the time). I forgot to include this in my novel length post of countless things to check/remember... It was a brilliant idea though, thank you...
I thank you for your time and help, I do sincerely appreciate it... Thank you... I think, and hope this matter is solved. It seems to be, the router is working perfectly as it allways has, and I'm positively happy as can be about it. Thank you... Peace...

Internet connect and net 75 route installed

running 10.4.10 I am connecting to the internet via the internet connect software. After I connet I get a default route but also a net 75.0.0.0 route with the ppp0 gateway gets install. I am trying to figure out what is responsible for installing the route. The console logs do not show any log entries that
I have to manually remove this route when I disconnect so until then anything destined for net 75 is blackholed.
Any clues how I can figure out what is responsible for installing the route and perhaps, how I can stop the route from being install.
Internet:
Destination Gateway Flags Refs Use Netif Expire
default link#10 UCSc 6 0 en2
66.174.30.4 75.208.81.118 UGHS 0 0 en2
66.174.31.4 75.211.76.166 UGHS 0 0 en0
75 link#10 UCSc 0 0 en2
127 127.0.0.1 UCS 0 0 lo0
127.0.0.1 127.0.0.1 UH 22 146559 lo0
169.254 link#10 UCS 0 0 en2
169.254.252.63 127.0.0.1 UHS 0 24 lo0
192.168.0 link#9 UC 0 0 vmnet1
192.168.149 link#8 UC 0 0 vmnet8

Since the route is for the entire 75/8 subnet and it's assigned to link#10 that implies that your machine has an interface in the 75/8 network.
Since 75/10 is assigned to SBCIS (now AT&T) and 75.64/13 is Comcast (who used to be run by AT&T), it seems clear that AT&T and/or Comcast is your ISP.
It's very common for cable companies to use very large subnets for their network.
At the end of the day, though, this indicates perfectly normal behavior and you are going to run into problems if you try to blackhole that network since it is required to talk to the upstream AT&T/Comcast routers.
If you're worried about sitting in the middle of such a big subnet (along with all your neighbors, etc.), well... that's what NAT routers are for.

Internet connection via Airport Extreme/router thats not working, why?

I have been having problems with the internet connection via Airport Extreme which I find it a bit unusual and its still driving me nuts! This is what happened:
I have lost my internet connection last Sunday evening upon my return from a weekend away from home. The last time I have used the internet connection on my macbook was the previous Friday morning. Prior to the apparent disconnection on Sunday, I have always used my internet connection wirelessly through Airport Extreme (that is connected via ethernet cable to the NETGEAR DG834v2 ADSL modem which had worked beautifully until the problem arose on my return). This wireless internet connection allowed me to surf the internet anywhere in my home.
However, upon the successful re-connection to the internet via the modem router, I have discovered several new problems. I have tried to set up the internet connection wirelessly again but instead the following happened:
1. Router (Netgear) drops ADSL connection and cannot reconnect when connected to airport via Ethernet. (which is the case when using airport wireless).
2. Router connects to ADSL fine when computer is connected to it via Ethernet. (However, router disconnects when magsafe power adapter is taken out for some inexplicable reason!)
3. Router connects to ADSL fine when nothing is connected to the router (ie. No Ethernet connections)
4. Router connects to ADSL fine when connected to airport via Ethernet and computer is connected to airport via Ethernet.
So from the above, I cannot connect to the internet properly whether wirelessly or not so I suspect it could be faulty router or could it be airport extreme? I have asked my ISP for an explanation and all they have said is that it cannot be the mis-configuration but could be to do with the power adaptors or the way plugs are set up and suggested I take out all the power plugs (and power surge protector) out to switch everything off, the macbook, router, printer and airport extreme. However, when I have re-plugged them all back in, the problems I have described above still persists!
Would appreciate any help if anyone here recognises why this is the case and what seems to be the cause of this. If so, what should I do? Though I have written back to my ISP again yesterday for more help so im waiting to hear from them...
Thanks
u2dougal

I have been having problems with the internet connection via Airport Extreme which I find it a bit unusual and its still driving me nuts! This is what happened:
I have lost my internet connection last Sunday evening upon my return from a weekend away from home. The last time I have used the internet connection on my macbook was the previous Friday morning. Prior to the apparent disconnection on Sunday, I have always used my internet connection wirelessly through Airport Extreme (that is connected via ethernet cable to the NETGEAR DG834v2 ADSL modem which had worked beautifully until the problem arose on my return). This wireless internet connection allowed me to surf the internet anywhere in my home.
However, upon the successful re-connection to the internet via the modem router, I have discovered several new problems. I have tried to set up the internet connection wirelessly again but instead the following happened:
1. Router (Netgear) drops ADSL connection and cannot reconnect when connected to airport via Ethernet. (which is the case when using airport wireless).
2. Router connects to ADSL fine when computer is connected to it via Ethernet. (However, router disconnects when magsafe power adapter is taken out for some inexplicable reason!)
3. Router connects to ADSL fine when nothing is connected to the router (ie. No Ethernet connections)
4. Router connects to ADSL fine when connected to airport via Ethernet and computer is connected to airport via Ethernet.
So from the above, I cannot connect to the internet properly whether wirelessly or not so I suspect it could be faulty router or could it be airport extreme? I have asked my ISP for an explanation and all they have said is that it cannot be the mis-configuration but could be to do with the power adaptors or the way plugs are set up and suggested I take out all the power plugs (and power surge protector) out to switch everything off, the macbook, router, printer and airport extreme. However, when I have re-plugged them all back in, the problems I have described above still persists!
Would appreciate any help if anyone here recognises why this is the case and what seems to be the cause of this. If so, what should I do? Though I have written back to my ISP again yesterday for more help so im waiting to hear from them...
Thanks
u2dougal

Internet Connection Sharing and NFS route problem?

My new box is yet to gets its wireless card so following the wiki I have painlessly set up ICS - this works great. The ICS host connects to my wireless router on wlan0 and to the ICS client on eth0. The ICS client attaches on eth0.
From the ICS client I can ping eth0 and wlan0 on the host and also the router but I can't access the NFS shares on the host - should I be able to access them on both wlan0 and eth0 - even if I bring down wlan0? I'm guessing I need another iptables rule...

I'm not quite sure I understand whats happening here.... So here is a "diagram":
ICS cli --- eth0 ---> ICS host --- wlan0 ---> router ---> internet
Yeah? From this, there is no reason for wlan0 to affect NFS from cli to host, assuming everything has been set up properly with the routing tables.
If you disable all iptables stuff (which is how I'm assuming you have the routing working), does NFS work? Have you set up your /etc/exports properly?
Can I see your iptables stuff as well?
And on a side note: I recently chucked NFS in favour of sshfs, it's much better for me personally. Considered that?

Internet connection lost with EA6500 router

I'm using a fiber optic internet connection and a Linksys/Cisco EA6500 router, with unlimited internet plan. Usually (1 to 2 days), the internet connection is lost and the way to get it back is the radical way in IT: 1st: switch off the modem and the router and wait a couple of minutes; 2nd : switch on the modem and the router. I suspect that this very annoying problem is related to the router settings. Someone can help me in get over this problem?
Thanks in advance.
Nuno

With this type of scenario, this will show that a reset on the router is needed to stabilize the router’s performance. One isolation step that you can try is to connect the computer straight to the modem. In that way, you will be able to determine if the connection coming from the modem is stable. Another step that you can try is to adjust the router’s mtu size by using this link: http://kb.linksys.com/Linksys/ukp.aspx?vw=1&docid=efe3edfeced9436a9f13eeebc89f90c2_4031.xml&pid=80&r.... By doing so, the router’s intermittent internet connection problem can be resolved. If in case that those steps will not improve the router’s internet connectivity, then you can consider returning and have that router replaced.

Internet Connection Lost Once 2nd Router Added to Network

I am at a point of complete loss and frustration and absolutely cannot figure this out.
About 4 months ago, I decided to add a 2nd router to my home network. I have a large house and was having connection issues in certain spots. My set up is:
Cable Modem ---(ethernet)--> Airport Extreme --(ethernet)--> Time Capsule
I have the network set up as a single network (Time Capsule extends the network). I followed all the Apple instructions and everything set up with ease and worked flawlessly. I was able to confirm that devices would switch from the Extreme to the Time Capsule depending on location. It was wonderful. Wifi bliss in my home!
Yesterday morning, I showed that I was connected to my wifi network but I could not get any data. Airport Utility showed Green Lights next to my 2 devices but an Orange light next to "Internet" with a status of Disconnected. I assumed it was an issue on my ISP side and went through a modem reboot and some other steps before confirming that I did in fact have an internet connection (hard wired ethernet from modem to MBP). I went through the same steps as before (after restores through the Airport Utility menu) and my wifi network comes back when the Airport Extreme is connected but as soon as the Time Capsule is connected, the Airport Utility shows that I am disconnected from the internet and I have no data transfer.
After hours of soft resets, hard resets, and factory resets including changing the name of the network and resetting/unplugging the cable modem I became convinced that the Airport Extreme was the culprit (I bought it "new" open box on ebay). So I bought a brand new Airport Extreme and the same thing happened. I tried various configurations including taking the Time Capsule out of the equation and going Airport Extreme to Airport Extreme and absolutely nothing works. Bottom line: Once I add a 2nd hard wired router to extend my network, I lose my connection to the internet and it says "Disconnected" at the top point of the Airport Utility. When I have a single router connected, everything works fine (I am using it right now).
Does anyone have any idea what would be causing this? I did not do any updates or anything odd. I just woke up one morning and something that worked for 4 months flawlessly is completely impossible to use.

I figured out the issue and resolved the problem. The Airport Extreme had WAN in from the Cable Modem and LAN out to the Time Capsule and to my DirecTV Home Cinema kit. I re-set up everything with all unnecessary LAN connections disconnected and it worked. I plug in the DirecTV LAN line and it all goes down again. It looks like the DirecTV Cinema device was frozen and causing the issue. Once I pulled the plug and rebooted it, everything went back online.
I have no idea why a frozen DirecTV Cinema device would cause this problem but it was definitely the culprit. Now I have an extra Airport Extreme. Sigh.

Hard wired PC losing internet connection with WRT160N V2 Router

I'm new to routers and I just added a WRT160N (V2) router. The wireless connection through my laptop is great. However, I have 1 PC physically connected to the router. The internet connection is sporadic on this PC. I have high speed "wireless" internet service and sometimes you click on the internet or check e-mail and there is no internet connection. It seems to be after the PC has sat idle for a while. When you click the internet, the PC icon on the router does not even blink - its like the PC and router are not talking. If it does connect, the connection is great. Any help would be appreciated!
Solved!
Go to Solution.

There is a known issue with intermittent connectivity and the Build 11 firmware for the WRT160N V2. Build 11 is the current firmware on the Linksys site. Check to see if you have Build 11 if your router is a V2.
Downgrading to Build 8 is generally accepted to correct these issues, however Linksys have indicated to several people they do not have the build 8 firmware to give to end users.
This is ONLY for WRT160N V2 routers. This firware will not work on WRT160N V1.
You can find it at http://audipages.com/router/
Follow the dowload and firmware downgrade instructions on that page.
Tomato 1.25vpn3.4 (SgtPepperKSU MOD) on a Buffalo WHR-HP-G54
D-Link DSM-320 (Wired)
Wii (Wireless) - PS3 (Wired), PSP (Wireless) - XBox360 (Wired)
SonyBDP-S360 (Wired)
Linksys NSLU2 Firmware Unslung 6.10 Beta unslung to a 2Gb thumb, w/1 Maxtor OneTouch III 200Gb
IOmega StorCenter ix2 1TB NAS
Linksys WVC54G w/FW V2.12EU
and assorted wired and wireless PCs and laptops

AE Flashing Amber (Status: Internet Connection) but Internet Green

Apologies if this has been asked before, I couldn't find an answer.
I'm on an AE with a Motorola SB6120 modem, paying for Comcast service.
My AE worked fine two weeks ago when I was on Centurylink at another address.
Problem:
AE is flashing Amber.
Status says "Internet Connection", yet...
AirPort Utility tells me that Internet is Green. Plus, I'm typing this through my wifi/internet, so it appears I'm online.
The other major issue is that none of my other wifi-capable devices can connect to my network. Only my MacBook. Not my iPhone, nor my wife's Dell laptop or Droid phone, nor my Nest thermostat. All can see the network, but none can connect to it. They either time out or, in the case of the Dell, say they can't find an IP address.
I have factory reset the AE, unplugged and re-plugged everything in every order I can think of. I've shut down my computer a half dozen times.
When I factory reset the AE, it was green/green for a moment, then went back to flashing Amber. At that point, it had two "Status" issues: Internet Connection and DNS Servers. I entered the DNS default: 75.75.75.75 and 75.75.76.76. DNS "status" went away, but "internet connection" remains.
When I click on the AE icon on the AirPort Utility, it gives the network name I chose, IP address is blank, the serial number is there and the version is 7.6.1. It lists one wireless client.
If I drill deeper, the "internet" menu says I'm connected using DHCP. IPv4 Address is blank. Subnet Mask is 255.255.255.0 and Router address is 192.168.100.1. I gave the DNS servers above, and IPv6 servers and domain name are blank. On the wireless menu, the network mode is "create a wireless network", the network name is correct, it's WPA2 Personal security. On the "Network" menu, the Router Mode is "Off (Bridge Mode). All else is greyed out.
If anyone can help, it would be greatly, greatly appreciated. I am at wits end, my wife cannot connect to our home network, and I am questioning why I bought an AE when every other router seems to work better.
Many thanks.

Vagabond0079 wrote:
I entered the DNS default: 75.75.75.75 and 75.75.76.76. DNS "status" went away, but "internet connection" remains.
Not sure what you mean by default, as those are Google DNS addresses. The default would be to not enter anything and allow Comcast to provide them. In a perfect world Comcast would provide you with the fastest, most reliable DNS service, but that is often not the case, which is why there is OpenDNS, Google Public DNS, etc. In any case, that's not your current problem and now that you have that part working you can decide if that's what you need later.
On the "Network" menu, the Router Mode is "Off (Bridge Mode). All else is greyed out.
There's the problem. It should be "Share a public IP address". Bridge Mode just short circuits the router, which is why only one device is connecting.

Upgraded to lion v10.7 java would no load cause of no Internet connection. Internet was working. Was able to connect to the Internet with no problem.

Upgraded to lion v10.7 during installation java could not load because of no Internet connection. But when asked to check for a Internet connection. No problem could not be found. Now error message randomly pops up saying java could not load because of no Internet connection. There is no problem with the Internet connection. Anyone know how to fix this problem. This popup is getting annoying.

Restart, ensure you're connected wired and not wirelessly, and launch Java Preferences.app in /Utilities. That should bring up a dialog saying you need to install the runtime version. Do it and that should fix your issue.

WRT1900ac internet connectivity problem, internet light blinking white!!!!?

So my wrt1900ac has been blinking white starting tonight. I logged into the router and did a router reboot. That didnt work, then I rebooted my modem still didnt work.
After all that I did a factory reset to my wrt1900ac which was a big mistake cause now my wrt1900ac WILL NOT set back up. It keeps getting stuck on detecting internet.
So I did a factory reset on my modem which is c1000a, and after the factory reset my modem works fine connects to wifi no problem what so ever. I put my modem back into transparent bridge mode, and tried to re-setup my router. Once again the wrt1900ac internet light just blinks white and will not connect even though my modem works perfectly fine can someone help me out please??
Solved!
Go to Solution.

Disconnect the router from the modem and login via IP Address 192.168.1.1. If you can't check the gateway address of the IP address your router gives your device. The default gateway is the router ip address. It can change if the router detects an IP address conflict.
Please remember to Kudo those that help you.
Linksys
Communities Technical Support

Macbook says its Internet connected but Internet doesn't work.

My MacBook which has not been used for a long time chow full wifi strength bet when I try to do anything Internet related safari says that it can't find the server.

I have had the same issue and searched the forums and found nothing that helped. I contacted apple support and this is what they told me to do:
First we’ll do the SMC reset
1.) Shut down the Mac and connect to power source.
2.) Unplug external devices, flash drives, external monitors, external HD (Keep the Mac plugged into power source)
3.) Hold down “Shift” + “Control” + “Option” (On the left side of the keyboard) + Power key for 30 seconds.
*The Mac should remain powered off during the reset, the LED on the MagSafe Adapter may change colors.
**The “Option” key is also known as the “Alt” key on some Macs.
Awesome, now let’s reset the NVRAM
1.) Locate these keys “Command”, “Option, “P” & “R”
2.) Power on your Mac
3.) Immediately press and hold all 4 keys “Command” “Option” “P” “R”
4.) Listen for 2 boot chimes and then release.
**The “Option” key is also known as the “Alt” key on some Macs.
Posting this here in the hopes that it will help someone else still searching for an answer.

Webpages intermittently stop loading, it is as if there is no longer any internet connection, however internet is fine because Chrome and IE can display pages.

Webpages will simply stop loading, the connecting logo spins as if it is trying to connect but nothing ever loads. Even after closing Firefox, the firefox process in task manager will not disappear by itself and has to be deleted manually, until it is deleted, Firefox cannot be loaded. Other browsers (Chrome & IE) continue to load pages fine when this happens.
This problem has been going on for a while now but getting gradually worse. I am now at the stage where webpages will stop loading after about 10-15 mins. The problem appears to only happen when I have visited a page that requires the flash plugin to work. After reading other related entries in this support forum, I can safely say that I think Flash is the problem. Whenever the plugin is disable the problem never happens. Flash also appears in the crash reports from FF. See below for my system stats.
Windows 7 64 Bit
FF24
Flash = 11.8.800.168 with hardware acceleration turned off
Flash Protected mode = 0
Number of net connections in FF = 64 (same problem occurs with 256 or 48 connections)
Virus Killer = Bit Defender (Firefox is registered as an exception). Problem happens even with virus software disabled.
Computer is certified clean of malware, spyware and viruses.
I can see that this is a reoccurring problem that seems to pop-up with different FF versions.
I have tried all of the suggested solutions on other posts, including various types of full reinstall but to no avail.
Finally, I am not prepared to reinstall Windows over this so please do not bother offering this as a solution, furthermore, I am not prepared to downgrade my Flash to a less safe version, especially when other browsers can work with Flash with no problems.
I look forward to hearing a solution.

Create a new profile as a test to check if your current profile is causing the problems.
See "Creating a profile":
*https://support.mozilla.org/kb/profile-manager-create-and-remove-firefox-profiles
*http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Profile_issues
If the new profile works then you can transfer some files from an existing profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over the problem.
*http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox
Boot the computer in Windows Safe mode with network support (press F8 on the boot screen) as a test to see if that helps.

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