I Can not coonect to internet through ethernet cable

I have Pavilion g4 1125 dx.I can connect to internet through wifi but cannot connect through cable.whenever i install lan driver it says realtek network controller was not found....anyone help me please....

moon_97 wrote:
I have Pavilion g4 1125 dx.I can connect to internet through wifi but cannot connect through cable.whenever i install lan driver it says realtek network controller was not found....anyone help me please....That can't be true here....I think your wifi is using another wifi other then the one provided by your ISP. Are you sure the lan driver is the correct driver for your Lan port? And I think you referring to your ethernet port? We have lots of terminology miss-used here and confused as to what they do.

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I can not access the internet through Nightly because of this message : COULD NOT FIND THE MOZZILLA RUNTIME.

After i updated the browser i can not access the internet. Can you help me please?

Hello LOUISE80, try a ''Clean reinstall''. This means you remove Firefox program files and then reinstall Firefox. Please follow these steps:
'''Note:''' You might want to print these steps or view them in another browser.
#Download the latest Desktop version of Firefox from https://www.mozilla.org/en-US/firefox/all/ and save the setup file to your computer.
#After the download finishes, close all Firefox windows (click Exit from the Firefox or File menu).
#Delete the Firefox installation folder, which is located in one of these locations, by default:
#*'''Windows:'''
#**C:\Program Files\Mozilla Firefox
#**C:\Program Files (x86)\Mozilla Firefox
Now, go ahead and reinstall Firefox:
* Double-click the downloaded installation file and go through the steps of the installation wizard.
* Once the wizard is finished, choose to directly open Firefox after clicking the Finish button.
More information about reinstalling Firefox can be found [[Troubleshoot and diagnose Firefox problems#w_5-reinstall-firefox|here]].
<b>WARNING:</b>Do not use a third party uninstaller as part of this process. Doing so could permanently delete your [[Profiles|Firefox profile]] data, including but not limited to, extensions, cache, cookies, bookmarks, personal settings and saved passwords. <u>These cannot be easily recovered unless they have been backed up to an external device!</u> See [[Back up and restore information in Firefox profiles]]. 
Thank you.

Can't Connect to Internet via Ethernet Cable.

Hi
I've looked around but haven't found anyone with exactly this problem. I can't get my MacBook Pro to connect to the internet via ethernet at my dorm. I am on the same connection with the same cable on a different computer right now, so I know that is not the problem. When I plug the cable in to my MacBook Pro it tells me that the cable IS connected, but when I try to go on a site on either Safari or Firefox, it takes a couple minutes trying and then tells me that I don't have a connection. I guess the problem lies somewhere between the connection and the browser. I am using DHCP (I don't know what that means but that's the default and other posts have said to make sure that that's what one is using) and the "connect using PPPoE" box is not checked. My ip starts out 192 etc. so I assume it isn't self-assigned. I WOULD LOVE ANY HELP YOU CAN OFFER.
I just got back to school today and this is already making this semester pretty awful.

I am having the same issue. Everything was working hunky-dory but then just up and stopped. The Airport works ok, but considering I am leeching off someone else's across the hall, that is not the most reliable solution.
In my Network Diagnostics, the Ethernet connection is given a green light, but the it seems unable to find the internet at all.
I have reset the router several times, restarted my computer several times, and various combinations of the two, as well as changing ports and cables etc...
any suggestions?

Installed Lion, lost Internet through ethernet cable. Any suggestions?

Hi there,
After installing Lion OS X system, I lost Internet through my Eternet Connection. Did work properly before. Any suggestions from your side to solve this issue?
JHoek

The modem is NetGear model DM111P.
The cable is currently plugged into the back of the iMac.
Yeah that is the one.. real pain.. is it in bridge or one to one NAT.. or you don't know.
So at present you have Modem--- computer??
Time machine is currently OFF. It is new, bought 3 months ago.
Mac OS X Lion 10.7.5
I cant find a re-set button on the Time machine
Time Capsule I guess you mean?? Time machine is software in the computer. Time Capsule is the box outside.
Just try.. plug
Modem--- wan port TC --lan port---Computer.
Press reset.. reset is small hole next to kensington lock.. use a paper clip and press it in gently until you feel a click... keep holding it for 10sec with the power on.. until the front led flashes rapidly.
See if the computer works to internet.. if not you can just unplug TC and connect back again.
The issue is the Netgear is giving TC an address 10.0.x.x and that is causing the TC which uses the same address range to fail.. perhaps. Or it is just the netgear being its normal rotten self.
I would recommend go and buy a wireless modem router.. wireless is a near zero add on price.. you can get TP-Link or cheap brand.. and much less trouble than the netgear..
The alternative is to bridge the Netgear and use PPPoE client in the TC.. but let me say this isn't easy IMHO.. and I see lots of posts of people struggling with that model.

My web pages aren't loading when connected to the internet through Ethernet cable?

Yesterday my web pages stopped loading on Safari. I tried loading them on google chrome and had the same problem. I then deleted all saved web site data and reset Safari but this still didn't solve the problem. Finally I restarted with safe mode, where the web pages loaded, but slowly, however when I restarted normally the web pages still weren't loading or partially loading. To test whether this was my computer or the ethernet cable I was connected to, I connected to the wifi at my university, where the web pages loaded perfectly. Plus, when connected to the ethernet cable I could Skype, use Spotify etc., it is just the web pages that are causing a problem. Any suggestions how I can fix this? Thank you!

1. This procedure is a diagnostic test. It changes nothing, for better or worse, and therefore will not, in itself, solve the problem.
2. If you don't already have a current backup, back up all data before doing anything else. The backup is necessary on general principle, not because of anything in the test procedure. There are ways to back up a computer that isn't fully functional. Ask if you need guidance.
3. Below are instructions to run a UNIX shell script, a type of program. All it does is to collect information about the state of the computer. That information goes nowhere unless you choose to share it. However, you should be cautious about running any kind of program (not just a shell script) at the request of a stranger on a public message board. If you have doubts, search this site for other discussions in which this procedure has been followed without any report of ill effects. If you can't satisfy yourself that the instructions are safe, don't follow them. Ask for other options.
Here's a summary of what you need to do, if you choose to proceed: Copy a line of text from this web page into the window of another application. Wait for the script to run. It usually takes a few minutes. Then paste the results, which will have been copied automatically, back into a reply on this page. The sequence is: copy, paste, wait, paste again. Details follow.
4. You may have started the computer in "safe" mode. Preferably, these steps should be taken in “normal” mode. If the system is now in safe mode and works well enough in normal mode to run the test, restart as usual. If you can only test in safe mode, do that.
5. If you have more than one user, and the one affected by the problem is not an administrator, then please run the test twice: once while logged in as the affected user, and once as an administrator. The results may be different. The user that is created automatically on a new computer when you start it for the first time is an administrator. If you can't log in as an administrator, test as the affected user. Most personal Macs have only one user, and in that case this section doesn’t apply. Don't log in as root.
6. The script is a single long line, all of which must be selected. You can accomplish this easily by triple-clicking anywhere in the line. The whole line will highlight, though you may not see all of it in the browser window, and you can then copy it. If you try to select the line by dragging across the part you can see, you won't get all of it.
Triple-click anywhere in the line of text below on this page to select it:
PATH=/usr/bin:/bin:/usr/sbin:/sbin; clear; Fb='%s\n\t(%s)\n'; Fm='\n%s\n\n%s\n'; Fr='\nRAM details\n%s\n'; Fs='\n%s: %s\n'; Fu='user %s%%, system %s%%'; AC="com.autodesk.AutoCAD com.google.GoogleDrive"; H='^[[:space:]]*((127\.0\.0\.1|::1|fe80::1%lo0)[[:space:]]+local|(255\.){3}255[[:space:]]*broadcast)host[[:space:]]*$'; NS=networksetup; PB="/usr/libexec/PlistBuddy -c Print"; A () { [[ a -eq 0 ]]; }; M () { find -L "$d" -type f | while read f; do file -b "$f" | egrep -lq XML\|exec && echo $f; done; }; AT () { o=`file -b "$1" | egrep -v '^(A.{16}t$|cann)'`; Ps "${1##*/} format"; }; Pc () { o=`grep -v '^ *#' "$2"`; l=`wc -l <<< "$o"`; [[ l -gt 25 ]] && o=`head -n25 <<< "$o"`$'\n'"[$((l-25)) more line(s)]"; Pm "$1"; AT "$1"; }; Pm () { [[ "$o" ]] && o=`sed -E '/^ *$/d; s/^ */ /; s/[-0-9A-Fa-f]{22,}/UUID/g' <<< "$o"` && printf "$Fm" "$1" "$o"; }; Pp () { o=`$PB "$2" | awk -F'= ' \/$3'/{print $2}'`; Pm "$1"; }; Ps () { o=`echo $o`; [[ ! "$o" =~ ^0?$ ]] && printf "$Fs" "$1" "$o"; }; R () { o=; [[ r -eq 0 ]]; }; SP () { system_profiler SP${1}DataType; }; id -G | grep -qw 80; a=$?; A && sudo true; r=$?; t=`date +%s`; clear; { A || echo $'No admin access\n'; A && ! R && echo $'No root access\n'; SP Software | sed '8!d;s/^ *//'; h=(`SP Hardware | awk '/ Id/{print $3}; /Mem/{print $2}'`); o=$h; Ps "Model"; o=$((h[1]<4?h[1]:0)); Ps "Total RAM (GB)"; o=`SP Memory | sed '1,5d;/[my].*:/d'`; [[ "$o" =~ s:\ [^O]|x([^08]|0[^2]|8[^0]) ]] && printf "$Fr" "$o"; o=`SP Diagnostics | sed '5,6!d'`; [[ "$o" =~ Pass ]] || Pm "POST"; p=`SP Power`; o=`awk '/Cy/{print $NF}' <<< "$p"`; o=$((o>=300?o:0)); Ps "Battery cycles"; o=`sed -n '/Cond.*: [^N]/{s/^.*://p;}' <<< "$p"`; Ps "Battery condition"; for b in Thunderbolt USB; do o=`SP $b | sed -En '1d;/:$/{s/ *:$//;x;s/\n//p;};/^ *V.* [0N].* /{s/ 0x.... //;s/[()]//g;s/(.*: )(.*)/ $\2$/;H;};/Apple|Genesy|Intel|SMSC/{s/.//g;h;}'`; Pm $b; done; o=`pmset -g therm | sed 's/^.*C/C/'`; [[ "$o" =~ No\ th|pms ]] && o=; Pm "Thermal conditions"; o=`pmset -g sysload | grep -v :`; [[ "$o" =~ =\ [^GO] ]] || o=; Pm "System load advisory"; o=`nvram boot-args | awk '{$1=""; print}'`; Ps "boot-args"; a=(/ ""); A=(System User); for i in 0 1; do o=`cd ${a[$i]}L*/Lo*/Diag* || continue; for f in *.{cr,h,pa,s}*; do [[ -f "$f" ]] || continue; d=$(stat -f%Sc -t%F "$f"); [[ "$f" =~ h$ ]] && grep -lq "^Thread c" "$f" && f="$f *"; echo "$d ${f%%_2*} ${f##*.}"; done | sort | tail`; Pm "${A[$i]} diagnostics"; done; grep -lq '*$' <<< "$o" && printf $'\n* Code injection\n'; o=`syslog -F bsd -k Sender kernel -k Message CReq 'caught bu|GPU |hfs: Ru|I/O e|last value [1-9]|n Cause: -|NVDA\(|pagin|proc: t|Roamed|SATA W|ssert|Thrott|timed? ?o' | tail -n25 | awk '/:/{$4=""; $5=""};1'`; Pm "Kernel messages"; o=`df -m / | awk 'NR==2 {print $4}'`; o=$((o<5120?o:0)); Ps "Free space (MiB)"; o=$(($(vm_stat | awk '/eo/{sub("\\.",""); print $2}')/256)); o=$((o>=1024?o:0)); Ps "Pageouts (MiB)"; s=( `sar -u 1 10 | sed '$!d'` ); [[ s[4] -lt 85 ]] && o=`printf "$Fu" ${s[1]} ${s[3]}` || o=; Ps "Total CPU usage" && { s=(`ps acrx -o comm,ruid,%cpu | sed '2!d'`); n=$((${#s[*]}-1)); c="${s[*]}"; o=${s[$n]}%; Ps "CPU usage by process \"${c% ${s[$((n-1))]}*}\" with UID ${s[$((n-1))]}"; }; s=(`top -R -l1 -n1 -o prt -stats command,uid,prt | sed '$!d'`); n=$((${#s[*]}-1)); s[$n]=${s[$n]%[+-]}; c="${s[*]}"; o=$((s[$n]>=25000?s[$n]:0)); Ps "Mach ports used by process \"${c% ${s[$((n-1))]}*}\" with UID ${s[$((n-1))]}"; o=`kextstat -kl | grep -v com\\.apple | cut -c53- | cut -d\< -f1`; Pm "Loaded extrinsic kernel extensions"; R && o=`sudo launchctl list | awk 'NR>1 && !/0x|com\.(apple|openssh|vix\.cron)|org\.(amav|apac|calendarse|cups|dove|isc|ntp|openld|post[fg]|x)/{print $3}'`; Pm "Extrinsic daemons"; o=`launchctl list | awk 'NR>1 && !/0x|com\.apple|org\.(x|openbsd)|\.[0-9]+$/{print $3}'`; Pm "Extrinsic agents"; o=`for d in {/,}L*/Lau*; do M; done | egrep -v 'com\.apple\.(CSConfig|server)' | while read f; do ID=$($PB\ :Label "$f") || ID="No job label"; printf "$Fb" "$f" "$ID"; done`; Pm "launchd items"; o=`for d in /{S*/,}L*/StartupItems; do M; done`; Pm "Startup items"; sys=`pkgutil --regexp --only-files --files com.apple.pkg.* | sort | uniq | sed 's:^:/:'`; b=`sed -E '/^.+Lib.+\/Contents\/Info.plist$/!d;s/\/Info.plist$//;/Contents\/./d' <<< "$sys"`; l=`egrep '^/usr/lib/.+dylib$' <<< "$sys"`; [[ "$b" && "$l" ]] && { o=`find -L /S*/L*/{C*/Sec*A,E}* {/,}L*/{A*d,Compon,Ex,In,iTu,Keyb,Mail/B,P*P,Qu*T,Scripti,Sec,Servi,Spo}* -type d -name Contents -prune | grep -Fv "$b" | while read d; do test -f "$d/Info.plist" || continue; ID=$($PB\ :CFBundleIdentifier "$_") || ID="No bundle ID"; printf "$Fb" "${d%/Contents}" "$ID"; done`; Pm "Extrinsic loadable bundles"; o=`find /usr/lib -type f -name *.dylib | grep -Fv "$l"`; Pm "Extrinsic shared libraries"; :; } || echo $'\nReceipts missing'; o=`for e in INSERT_LIBRARIES LIBRARY_PATH; do launchctl getenv DYLD_$e; done`; Pm "Environment"; o=`find -L {,/u*/lo*}/e*/periodic -type f -mtime -10d`; Pm "Modified periodic scripts"; o=`scutil --proxy | grep Prox`; Pm "Proxies"; o=`scutil --dns | awk '/r\[0\] /{if ($NF !~ /^1(0|72\.(1[6-9]|2[0-9]|3[0-1])|92\.168)\./) print $NF; exit}'`; i=`route -n get default | awk '/e:/{print $2}'`; I=`$NS -listnetworkserviceorder | sed -En '/ '$i'\)$/{x;s/^$.+$ //p;q;};x'`; n=`$NS -getdnsservers "$I" | awk '!/^T/{print "not "}'`; Ps "DNS (${n}from DHCP)"; o=`$NS -getinfo "$I" | awk '/k:/{if ($3 !~ "(255\.){3}0") print $3}'`; Ps "Netmask"; R && o=`sudo profiles -P | grep : | wc -l`; Ps "Profiles"; f=auto_master; [[ `md5 -q /etc/$f` =~ ^b166 ]] || Pc $f /etc/$f; for f in fstab sysctl.conf crontab launchd.conf; do Pc $f /etc/$f; done; f=/etc/hosts; Pc "hosts" <(egrep -v "$H" $f ); AT $f; Pc "User launchd" ~/.launchd*; R && Pc "Root crontab" <(sudo crontab -l); Pc "User crontab" <(crontab -l | sed -E 's:/Users/[^/]+/:/Users/USER/:g'); R && o=`sudo defaults read com.apple.loginwindow LoginHook`; Pm "Login hook"; LD="$(`find /S*/*/F* -type f -name lsregister | head -n1` -dump)"; o=`for ID in $AC; do [[ "$LD" =~ $ID ]] && echo $ID; done`; Pm "Application check"; Pp "Global login items" /L*/P*/loginw* Path; Pp "User login items" L*/P*/*loginit* Name; Pp "Safari extensions" L*/Saf*/*/E*.plist Bundle | sed -E 's/(\..*$|-[1-9])//g'; o=`find ~ $TMPDIR.. $ -flags +sappnd,schg,uappnd,uchg -o ! -user $UID -o ! -perm -600 $ | wc -l`; Ps "Restricted user files"; cd; o=`SP Fonts | egrep 'id: N|te: Y' | wc -l`; Ps "Font problems"; o=`find L*/{Con,Pref}* -type f ! -size 0 -name *.plist | while read f; do plutil -s "$f" >&- || echo $f; done`; Pm "Bad plists"; d=(Desktop L*/Keyc*); n=(20 7); for i in 0 1; do o=`find "${d[$i]}" -type f -maxdepth 1 | wc -l`; o=$((o<=n[$i]?0:o)); Ps "${d[$i]##*/} file count"; done; o=; [[ UID -eq 0 ]] && o=root; Ps "UID"; o=$((`date +%s`-t)); Ps "Elapsed time (s)"; } 2>/dev/null | pbcopy; exit 2>&-
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Airport Extreme bs not connecting to internet through ethernet network

I live in a dormitory at a school. I have a network jack in the wall of my apartment that connects me to the rest of the school network and the internet. I have an Apple airport music thing that plugs into the wall socket and delivers wireless network and internet access to my apartment.
I also have a new airport extreme base station that I set up by using the wizard set-up software. My computer sees the base station. The network connection software says I have a strong network connection. But I can't access any service either on the local network or the internet.
Any thoughts about what I should change in the base station set-up to make it talk to the rest of the world?

I fixed it myself.
It was not a computer related problem. We have a network registration procedure that I forgot to do before the internet works.

Satellite C655D-S5533 can't connect to internet through ethernet (wireless connection ok)

I can't get an ethernet connection thru my ISP's (Comcast) internet cable box. I clicked the LAN icon on control panel but still can't connect.

First, reboot the Comcast box and then reboot the computer. If it still doesn't work, look in Device Manager under Network Adapters. If the LAN adapter shown there is Atheros, reinstall using THIS driver. If it says something else, post back. I'm assuming you are still using Windows 7 64 bit that came with the machine.
C.B.
Toshiba Sat. C75D-B7260 Win 8.1 64 Bit--Toshiba Sat. L775D-S7132 Win 7 HP SP1 64 Bit and Win 10 PRO Technical Preview--Toshiba Sat. L305-S5921 Win Vista SP2 32 Bit

My backup to Time Capsule is taking over 4 million days. How can I shorten the time? I am not able to connect through ethernet. How do I fix this?

My backup to Time Capsule is taking over 4 million days. How can I shorten the time? I am not able to connect through ethernet. How do I fix this?
Not only that but my Mac Pro keep running and does not stop, my Address book has a blue light under it but wont open, the light for my monitor in the bottom right corner wont turn on or off. Please need help...

It sounds like there is an issue with the Mac itself.
Use the verify disk A5 in troubleshooting.
http://pondini.org/TM/Troubleshooting.html
Even if you cannot connect by ethernet, at current location.. you can simply disconnect the TC from the network and bring it to the Mac and plug it in by ethernet. The TC can be reset if you haven't got a suitable current setup (save previous setup before you change it) and run just as backup device.. do the backup and then return it to the network.
If this is just a standard incremental backup.. then something has broken. The issue is not the TC pe se but failure in hardware somewhere.

Action initiated: Upgrade Mac Book Pro to Mountain Lion OS X 10.8.-, via Wi-fi. After 2 hours said could not install it. I tried again through Ethernet (cable). No success. Should I buy itagain? How this thing with the Apple store works? Not so familiar.

The OS X Mountain Lion I tried to download Wi-Fi on Mac Book Pro was not successfull. Should I buy it again? Should I check with Apple store for credit?
I successfully instaled it in iMac, but have problem with laptp. I also think I should not have bought 2 upgardes, becase if I have 2 computers, one paid upgrade is good for both computers. Am I wrong? SOmeone can advise how to proceed? I want to try again through Ethernet - cable internet - instead of Wi-Fi. Thank you

You should not have paid twice. If you logged into the App Store with the same AppleID as you used to purchase Mountain Lion the first time, you should not have been charged again.
If you internet connection is not working well enough to download it, do you have access to another network that might be faster? Perhaps and Apple Store nearby?

I have a signal but can not connect to internet.

Ok, I have an Ibook clamshell and an airport Graphite. The Ibook picks up a signal but when I go to Safari or Internet Explorer I get a message saying the server can not be found. Help, please?

In the opening screen of AirPort Admin Utility, check the firmware version of your Graphite base station. It should show up as "Description: Base Station Vx" where x is the firmware version. If it is earlier than 3.84, download updated firmware from this page and install it.
I found the user guide for your modem on Arris's Web site. It prompts me to suggest the following additional things:
1. Although the user guide says to use a cross-over Ethernet cable for connection to a hub or home router (as opposed to the supplied cable, presumably a straight-through Ethernet cable, for direct connection to a computer), I believe that the Graphite acts like a computer in this regard instead of like a router. In other words, the Graphite connects to a modem, hub or router using a straight-through cable, but the Graphite would need a cross-over cable to connect to a computer. Try using a straight-through cable, if you haven't already.
2. Try pushing the Reset button on the back of the modem. Use a pointed, non-metallic object to press the button. I recommend doing this while the Graphite and both computers are powered off, then start up the Graphite first, before the computers.
3. This type of modem evidently does not itself serve as a router. It has connections for two computers (one via USB, one via Ethernet), but your ability to get two Internet connections through it depends on whether your Internet service provider is willing to supply two IP addresses. (If you try resetting the modem with the pc off, as in paragraph 2 above, and the Graphite acquires a working IP address, enabling the iBook to access the Internet, but the pc then can't, that would indicate that you can receive only one connection at a time.) I suspect that this is, in fact, your problem, unless your cable provider has said that you could connect two computers to the Internet with this modem.
It would be possible to share a single Internet connection, if the pc has either wireless or Ethernet capability. If it has wireless, you could simply disconnect the pc's USB connection to the modem and have it join the Graphite's wireless network. If it has Ethernet, you might be able to connect it to the modem's Ethernet port along with the Graphite, using an Ethernet hub, but this is difficult and uncertain, as well as less secure. If the pc can handle Ethernet, you'd be better off getting a newer and better wireless base station that has 2 or more Ethernet ports, or, alternatively, a router to be inserted between the modem and both the pc and the Graphite. In any case, a base station that can use WPA or WPA2 wireless encryption would be a great improvement, as the quite insecure WEP protocol is the best the Graphite can handle.
Message was edited by: Larry R.

I cannot get on the internet through Ethernet

Hi Everyone,
I am 100% new to macs, I just purchased a mini used from someone and I have tried to set up the internet through ethernet card and it will not work. I have researched for two days now and there doesn't seem to be an answer. I have done it all using DHCP to try to automatically get the settings but it is bringing up 169 IP address is is wrong. I have tried manually entering the information in and no luck. It is connected straight from the modem there is no router. I am usually good with PC's and could fix everything but right now I am stumped. I am running Mac OS X v10.4 Tiger. I thought I would try this out to see if anyone could help.
Thank you in advance

OK, If they are not using fixed IP addresses, then you should be using THEIR Router. You should get your IP Address through DHCP from their Router. \[As an aside, there can be quite a large cascade of Routers -- yours plus theirs.]
The 169.254.xxx.yyy address is the "self-assigned" address used by your Mac when no one responds to its initial broadcast of a request for assignment of an IP address. This is a complicated way of saying "no one will talk to you".
One thing to check for before declaring their box dead is the lights when the cables are plugged in. No lights sometimes means you are using a cross cable where a straight cable is required or the reverse. Most modern Macs "sniff" the cable and adjust to use whatever cable is provided, but older Macs do not.
Some providers grab the first M.A.C. Address (Hardware Address) they see, and limit connection to only that device, ever. So if your computer dies and you get a new one, you have to call them up and ask them to reset their box. Sometimes there is a procedure for a "Deep" reset in their manuals, and you may need to apply that now. \[and if you decide to add your own Router later, you call them and tell them you are installing a different "computer". Your Router then becomes the only registered device.]
Message was edited by: Grant Bennet-Alder

Macbook Pro suddenly will not connect to the internet via ethernet cable.

I know this is a long shot... but I figured I would give it a try.
My macbook pro suddenly does not connect to the internet via ethernet cable. Please bear with me, as I am not very tech-savvy - I will try my best to describe the symptoms!
I connect to the internet via ethernet (we don't have wifi). It was working before I went to work, and when I came home I suddenly couldn't get anything to work (I know everyone says this, but I truly didn't mess with anything). Internet browsers just think for awhile and then turn up the 'You are not connected to the internet' error.
I went into my network preferences and curiously, the 'Ethernet' shows a green dot and says 'connected'. However it says 'Authentication server is not responding' underneath the last part that says '802.1X: WPA: eduroam' (I think that is my user profile).
When I go into my 'security' settings I can see that my firewall is off, so that shouldn't be causing any problems.
I've tried restarting the router and computer itself many times. Diagnostics just gets to a certain point and reports back 'Network Diagnostics cannot fix the current networking problems.' I've also tried switching to a different ethernet cable, and I tried both cables out on a PC laptop and it connected without issue. Additionally, I brought my macbook along to a friend's house and it connected to his wifi just fine, so the problem appears to just be with ethernet connections.
I know it's hard to troubleshoot this kind of thing without being there and having a look at the computer yourself, but any tips wouild be greatly appreciated.

As I mentioned above, I am not very tech savvy so I have no idea why a wireless protocol would be showing up there, I'm just listing everything I see in hopes that someone might know something I can try. This is why I am asking for help here - I'm not sure what has happened that has made me unable to connect, especially since it seemingly occured while nobody was using the computer.
I guess I should clarify that I'm not a total hillbilly- normally my firewall is set to 'on', but I set it to 'off' to try and troubleshoot the issues here as I was told that sometimes it can interfere with the computer's ability to connect to the internet. If this is not the case and firewall does not affect anything, I will turn it back on while I try to fix this.
I have tried the method you mentioned above a few times - I actually contacted my ISP earlier this week and they recommended resetting the router like that. They didn't mention any known network issues.

Can't connect to internet through WRT54G

I can connect to the internet through DSL modem but cannot when going through the WRT54G. All lights on router lit correctly. Actually set up this router 6 months ago or so and worked both wired and wirelessly for awhile. Then could only access internet wirelessly with laptop. Started messing with the router to get it to work wired with desktop but now won't work. Can access the router set-up page but not sure what to change. Saw somewhere to change the routers IP address to 192.168.2.1 didn't solve the prblem. Have tried restoring factory defaults, recommended power on/off sequences (modem, router,pc) and holding reset button for 30 seconds. Also tried Easy connect tool on the Linksys site. Icon in lower right of pc screen indicates status as connected but still cannot connect to internet. Any help is very much appreciated.
Scott

I had the very same problem with the same model router. It turned out to be the Security setting in Internet Options. The security setting was on Medium. After changing it to Medium-Low, I could connect to the internet through the router.
If you are not familiar with changing the Security setting, let me know and I will reply with the steps to take.
Dale
Shelby, NC

Not connected to internet through airport xtreme (connection is ok) after upgrading iOS6

after upgrading to iOS6 none of my mobile devices (running iOS6) can go online on internet through my airport extreme. My MAC is using the same without problem.

Look at iOS Troubleshooting Wi-Fi networks and connections http://support.apple.com/kb/TS1398
iPad: Issues connecting to Wi-Fi networks http://support.apple.com/kb/ts3304
iOS: Recommended settings for Wi-Fi routers and access points http://support.apple.com/kb/HT4199
Additional things to try.
Try this first. Turn Off your iPad. Then turn Off (disconnect power cord) the wireless router & then back On. Now boot your iPad. Hopefully it will see the WiFi.
Go to Settings>Wi-Fi and turn Off. Then while at Settings>Wi-Fi, turn back On and chose a Network.
Change the channel on your wireless router. Instructions at http://macintoshhowto.com/advanced/how-to-get-a-good-range-on-your-wireless-netw ork.html
Another thing to try - Go into your router security settings and change from WEP to WPA with AES.
How to Quickly Fix iPad 3 Wi-Fi Reception Problems
http://osxdaily.com/2012/03/21/fix-new-ipad-3-wi-fi-reception-problems/
If none of the above suggestions work, look at this link.
iPad Wi-Fi Problems: Comprehensive List of Fixes
http://appletoolbox.com/2010/04/ipad-wi-fi-problems-comprehensive-list-of-fixes/
Fix iPad Wifi Connection and Signal Issues http://www.youtube.com/watch?v=uwWtIG5jUxE
Unable to Connect After iOS Update - saw this solution on another post.
https://discussions.apple.com/thread/4010130?tstart=60
Note - When troubleshooting wifi connection problems, don't hold your iPad by hand. There have been a few reports that holding the iPad by hand, seems to attenuate the wifi signal.
~~~~~~~~~~~~~~~
If any of the above solutions work, please post back what solved your problem. It will help others with the same problem.
 Cheers, Tom

Can't connect to Internet via ethernet

I have two brand new 11" MacBook Airs. I can connect to the internet via ethernet on one and not the other. I little back story...
I previously had two 13" MacBook Pros and had the same issue – one could connect to the internet via ethernet and one couldn't. I used migration assistant when I upgraded to the new MBAs, so I believe I carried over a setting from the previous "problem" comuter to the new one. Interestingly, both of my MacBook Pros connected to the internet via ethernet just fine until, for reasons unknown to me, one day one would no longer work.
When I look at diagnostics, the lights are (from top to bottom): green, yellow, green, red, red
Is it possible to revert some ethernet networking setting to factory?
Thanks for any help you may be able to provide.
Caanan

The same thing has happened to me, it just stopped working. No, I've had this problem for a long time with this machine, but the other day I was downloading some large files, and all the files dropped down to nothing, internet was gone.
It will connect to Wireless, but now I'm even having problems with that.
If I plug in the Ethernet cable but set it to use AirPort, it won't find the web. I have to unplug the cable and it will use AirPort -- not good when I need to access hard drives! It had been working with it plugged in, but it just stopped. (I don't know if it was using the Ethernet or the AirPort at the time.) I wasn't messing with any settings at the time.
Tried restarting, running diagnostics, using different browsers, various websites, didn't help.
It's a MacBook 2,1 -- 2.0 GHz, Intel Core 2 Duo -- 10.4.11
I have a G4, same OS, using the same router, same settings, everything. G4 works perfectly.

I Can not coonect to internet through ethernet cable

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