Trouble connecting to cable modem

Cable company is telling me my mac has a problem connecting to the modem. Will not connect to a dynamic IP address. Any ideas on what is wrong. I can connect fine at Best Buy and wirelessly to my neighbors but not to their modem in my home.

Log into your modem.
check the settings.
have cable co check that their last drop point has a good signal and is this a rental modem from them or yours? and is there any fimrware update?
When did it start having trouble?
And have you thought of posting in the macbook pro forum as well as over on Snow Leopard OS support?
Apple has some good tutorials on troubleshooting networking and internet connection issues.
http://www.apple.com/support

Similar Messages

Connecting to cable modem via ethernet hub

My old airport just died and I just began reviewing the capabilities of the airport express. Would it be possible to access a cable modem if I hardwire it into my ethernet network and plug another CAT 5 cable into the airport - giving me wireless access to the rest of the computers and printers on my network.

You cannot directly connect your cable modem to a spare port on your existing ethernet network. Not only will this not allow you to share your internet connection, but it will also significantly complicate file and printer sharing AND it will remove the all-important firewall protection that should be in place between your LAN and the internet.
Therefore, if you want to share a cable modem connection with both wireless and non-wireless computers on a LAN, the Airport Express is not the right product for you. You need to buy either an Airport Extreme Base Station, or a non-Apple wireless router (all of which are designed to also allow a connection to a cabled ethernet LAN).

My iMac G5 is not registering the connection of cable modem

Something freaky happen to my computer one morning about a month ago and since then, I haven't been able to connect to the internet.
My computer is set to start up at a certain time in the a.m. and connects to the internet automatically. Recently, it started up before I awoke and when I did wake up I noticed that the my homepage for my web browser didn't load. I could tell moments later that there must have been a brief power outage to the home. I restarted my web browser and then the computer itself to no avail. I still could not connect to the internet.
I don't know a lot about computers from a technical standpoint, but I know a little. I looked at the network configurations to see if anything stood out. The one thing I noticed was the ethernet settings read to connect the ethernet cable to the computer. Since the cable was actually connected. I figured I may have a big problem on my hands.
The other issue I've noticed is the amount of time it takes to startup and shut down. It's not a very long time (maybe 5 minutes), but I think longer than normal or I remember prior to having internet issues.
If anyone has any clue to what may be going on with my machine, I would definitely appreciate some insight. All suggestion are welcomed.
BTW, I called a so called "Mac Specialist" in the town I reside in and was told that my computer's logic board needed to be replaced and it could cost me as much as $600. I most certainly hope that's not the only solution.
Thanks in advance!

There is a possibility the machine may have sustained some
damages due to a power surge, a brown-out or other variation
in electricity supplied to the machine from the grid.
An uninterruptible power supply with an automatic voltage
regulation circuit built into it is helpful to isolate computers
from the variations and unpredictability of some grid power.
This is not a surge protector. Those are not recommended.
You could try and see if repairing disk permissions in the
system by using that option in Disk Utility. Perhaps to
check and repair the hard disk drive, too, by using the
booted OS X installer's version of Disk Utility, is wise.
On the original OS installer packet disc #1 where the
Installer and Apple Hardware Test are located, it may
be wise, too, to run the Hardware Test to see if any
issues are reported or trouble indicated.
A reset of the power management unit or system manage-
ment controller, etc (whichever your model has) could be
helpful, even if it starts up and runs OK after an outage.
{And a re-install of the complete operating system on a
fully erased (wiped, overwritten with zeroes) reformatted
hard disk drive may be a part of this troubleshooting; if
you keep good records of what you do and how it was
done, even a fair tech should be able to tell you more
directly (if they are fair and honest) of the likelihood of
the hard disk drive being the cause of your problems.
-Doing this would destroy all of your stuff in the Mac.}
There is a chance that the hard disk drive may have a
few issues after a power incident, in some cases, a
few bad blocks or sections of the drive may be bad if
the machine's data was affected by an outage; these
can be checked and sometimes successfully repaired
by using a disk utility; some suggest use of DiskWarrior.
Have you been able to test the cable modem itself;
perhaps reset the modem and then reattach the
computer to it; or see if it works with another computer?
Sometimes, even booting the computer in SafeBoot mode
and then login, then choose to run Disk Utility's repair disk
permissions, and then restart the computer normally, helps.
Have you tried a second user account to see if the issue
of connectivity is isolated to the main or admin account?
Usually, all accounts share the main connection settings.
Sometimes, checking and re-affirming settings can help;
at least as part of a troubleshooting path, to see what
doesn't fix it, and hope to find something which does.
If the issue does come down to a hardware repair of
more than a reasonable percentage of a refurbished
Mac direct from the Apple Store online, consider a
different computer. Even the low-end Intel based iMac
is leaps ahead of the G5 iMac. (I still have G4s!)
PS: What are you using to get online?
In any event...
Good luck & happy computing!

Losing internet connection (Ethernet, cable modem)

Hi,
Lately (the past month or two), I am tending to lose my internet connection. (I never would before.) I connect via Ethernet to my cable modem. My ISP tells me that if I am getting 4 steady lights on my modem (with the 5th flickering), it isn't the modem. (I was thinking of replacing it.)
Rebooting the computer will fix it. One minute it's fine, the next it may have lost the connection. When I lose connection, Network Diagnostics* says my built in ethernet and network settings are ok (green). The rest will vary (going on memory here), ISP, may or may not be green, Internet and server will be definitely out, when this happens.
* I have dragged it out of wherever it was buried and have it now on my desktop. It is VERY convenient to check what is going on with my connection problems. (I guess I have created an applet?) I recommend this to all.
I am considering re-installing the OS (archive and install) but am hoping someone can offer some suggestions for me to try short of that.
Disk Utility and Tech Tool Deluxe don't indicate any problems. I can try the Apple Hardware Test. I am hoping this isn't a hardware issue as I cannot afford a new Mac or other repairs. I can live with rebooting if I have to.
Thank you.
John L

The colors refer to what Network Diagnostics shows. Network Diagnostics is an Apple app that pops up when Safari has trouble connecting. I don't use Safari but loved having Network Diagnostics pop up so I figured out a way to use it independently of Safari. I dragged it out of wherever it was buried, put it on my desktop where it became an app and I use it at will to see why I am not connecting.
It will show green, yellow or red as an indication of each aspect of the connection: built in ethernet, network settings, ISP, Internet and server (being Apple's server). Right now, all are green. When I can't connect, I'll have several going from server backwards that are red. If it can't figure out the status I get a yellow light.
When I've asked my ISP why I am getting disconnected, they said if all 4 lights of the modem are steady (and the yellow one flickering), which they always have been when I've been disconnected, then it isn't the modem or them. They have good tech support and I trust them.
I have replaced the modem once in the past and that fixed things. I may do it again.
So, I don't know. I haven't tried the Safe Mode approach yet. I'll see if I can do that.
Cheers,
John

I have airport extreme 802.11AC as a base that connect to Cable modem. How can I connect D-link DIR-655 to AE to utilize as an extender or repeat?

Hello-
I have wireless router Airport Extreme 802.11AC that connect direct to Cable modem...how can I setup the D-Link DIR-655 wireless router to AE and act as extender or repeater?. Thanks in advance.

Apple has done their best to install proprietary software in their wireless routers that is designed to only allow other Apple routers to repeat or extend the network wirelessly.
So, the chances are extremely small that a D-Link....or another other router for that matter.....could be configured to do what you ask.
There are no settings on an AirPort Extreme that would allow a D-Link device to extend the network, so all that you can do is experiment with different settings on the D-Link device to see if it might be possible for it to extend the network.
A post on a D-Link support forum might be a good idea to see if any D-Link specialists have some ideas on this topic.
Good luck.

Router connected to cable modem by Ethernet port cannot get IP address from DHCP.

I have an ethernet cable on Fa0/0 connecting my 1841 router to my cable modem. The issue is that the router cannot obtain an IP address via DHCP when I have the "ACL-OUTSIDE-IN" ACL applied inbound on the Fa0/0 interface. I tried to allow all BOOTP and BOOTPS traffic in my ACL, but still no luck. I really don't want to run the router without a simple ACL firewall and connect it to the internet. When I take off the ACL off of Fa0/0, the router is able to get an IP address via DHCP.
Router#sh run
Building configuration...
Current configuration : 10736 bytes
! Last configuration change at 18:14:42 MST Fri Nov 16 2012 by matt.chan
version 12.4
service nagle
service timestamps debug datetime msec localtime show-timezone year
service timestamps log datetime msec localtime show-timezone year
service password-encryption
hostname Router
boot-start-marker
boot system flash:c1841-advipservicesk9-mz.124-25f.bin
boot-end-marker
logging count
logging userinfo
logging buffered 1048576 informational
enable secret 5 <removed>
aaa new-model
aaa authentication login AUTH-LOCAL local-case
aaa session-id unique
memory-size iomem 25
clock timezone MST -7
ip cef
ip nbar pdlm flash:directconnect.pdlm
ip nbar pdlm flash:citrix.pdlm
ip nbar pdlm flash:bittorrent.pdlm
ip nbar custom steam destination udp range 27000 27030
ip nbar custom rdp destination tcp range 3389 3391 55402
ip domain lookup source-interface FastEthernet0/0
ip name-server 8.8.8.8
ip inspect name fa0/0_inspect_ou icmp router-traffic timeout 10
ip inspect name fa0/0_inspect_ou ftp timeout 300
ip inspect name fa0/0_inspect_ou udp router-traffic timeout 120
ip inspect name fa0/0_inspect_ou tcp router-traffic timeout 300
login block-for 60 attempts 4 within 60
login quiet-mode access-class ACL-ACCESS-QUIET
password encryption aes
crypto pki trustpoint TP-self-signed-1755372391
enrollment selfsigned
subject-name cn=IOS-Self-Signed-Certificate-1755372391
revocation-check none
rsakeypair TP-self-signed-1755372391
crypto pki certificate chain TP-self-signed-1755372391
certificate self-signed 01
3082023F 308201A8 A0030201 02020101 300D0609 2A864886 F70D0101 04050030
31312F30 2D060355 04031326 494F532D 53656C66 2D536967 6E65642D 43657274
69666963 6174652D 31373535 33373233 3931301E 170D3132 31313137 30313130
35325A17 0D323030 31303130 30303030 305A3031 312F302D 06035504 03132649
4F532D53 656C662D 5369676E 65642D43 65727469 66696361 74652D31 37353533
37323339 3130819F 300D0609 2A864886 F70D0101 01050003 818D0030 81890281
8100D53F 9EB5B123 3103A4D5 82E786F7 F91C2DE5 9E409A22 80AF78F6 812F624A
89FE9103 73C4AAAB 13FF880D F628607D 6888AC49 18BEDD77 778F0DB1 F9A796E9
E92717CD 6DD19450 5066620A 91278C33 E38349EA 92B8C671 80761609 0AC46E6F
2C8C6BCF ABC7E1F7 A64BD28C C85477FE B23F8A7C 555ECDF9 CE461B8D 6C017370
0ED70203 010001A3 67306530 0F060355 1D130101 FF040530 030101FF 30120603
551D1104 0B300982 074E5543 4C455553 301F0603 551D2304 18301680 146CA2E0
936C651F E2ED4DCD D7025FF3 2AB029E0 95301D06 03551D0E 04160414 6CA2E093
6C651FE2 ED4DCDD7 025FF32A B029E095 300D0609 2A864886 F70D0101 04050003
8181004A AFA4D07C 1424DE0E EF3F17F2 BB1EA63B CB17C13D 1AEA31A1 BAB6AF77
DB6EA8A2 2117DCD1 5530A18C 3618D568 CC7EF520 E039ACBD DA906352 BB7E51BD
0954490C B2AB30C2 FBBE4738 C214BE1C CB63FFEA BAFC46E0 3DC419EE 714B9ABD
144A21E3 3E54C103 FF47FAF1 412FE5C4 59ACD1FE FD72356B C8DC04C3 E2EDF275 45954C
quit
username <removed secret 5 <removed>
ip ssh maxstartups 10
ip ssh time-out 60
ip ssh authentication-retries 2
ip ssh port 2226 rotary 1
ip ssh version 2
class-map match-all Zuri-YouTube-Class
match access-group name NAT-Pool-Zuri-WLAN
match protocol http host "*youtube.com*"
policy-map PMAP-QOS-VTI-IN
description QOS FOR TU0
class class-default
shape peak 1512000
policy-map PMAP-QOS-VTI-OUT
description QOS FOR TU0
class class-default
shape peak 512000
crypto isakmp policy 1
encr aes 256
authentication pre-share
group 5
lifetime 43200
crypto isakmp key 6 <removed> address <removed>
crypto isakmp invalid-spi-recovery
crypto isakmp keepalive 10 5 periodic
crypto ipsec transform-set EDGE-TS ah-sha-hmac esp-aes 256
crypto ipsec profile EDGE
set security-association lifetime kilobytes 256000
set transform-set EDGE-TS
set pfs group5
interface Loopback0
no ip address
interface Tunnel0
description "VTI Link"
bandwidth 4000
ip address 172.20.0.2 255.255.255.0
ip mtu 1400
ip nbar protocol-discovery
ip nat inside
ip virtual-reassembly
ip tcp adjust-mss 1360
ip ospf authentication message-digest
ip ospf message-digest-key 1 md5 7 12090011003E5A0C0F186E752220211B4A
keepalive 10 5
tunnel source FastEthernet0/0
tunnel destination <removed>
tunnel mode ipsec ipv4
tunnel path-mtu-discovery
tunnel protection ipsec profile EDGE
service-policy output PMAP-QOS-VTI-OUT
hold-queue 75 out
interface FastEthernet0/0
description "Link to ISP"
bandwidth 4000
ip address dhcp
ip access-group ACL-OUTSIDE-IN in
no ip proxy-arp
ip nbar protocol-discovery
ip nat outside
ip inspect fa0/0_inspect_ou out
ip virtual-reassembly
ip ospf cost 1
duplex auto
speed auto
no keepalive
no cdp enable
interface FastEthernet0/1
description "Link to LAN"
ip address 172.16.0.1 255.255.255.248
ip access-group ACL-INSIDE-IN in
no ip proxy-arp
ip nbar protocol-discovery
ip nat inside
ip virtual-reassembly
ip ospf cost 1
ip ospf priority 255
duplex auto
speed auto
no keepalive
router ospf 1
log-adjacency-changes
redistribute static subnets
passive-interface default
no passive-interface Tunnel0
network 172.20.0.0 0.0.0.3 area 0
ip forward-protocol nd
ip route 10.0.0.0 255.0.0.0 Null0 name "Class A Private"
ip route 172.16.0.0 255.240.0.0 Null0 name "Class B Private"
ip route 172.17.0.0 255.255.0.0 FastEthernet0/1 172.16.0.2 name "Home WLAN"
ip route 172.19.73.31 255.255.255.255 Null0
ip route 172.27.0.0 255.255.0.0 Tunnel0 172.20.0.1 name "IPsec GRE Tunnel"
ip route 192.168.0.0 255.255.0.0 Null0 name "Class C Private"
ip route 192.168.0.0 255.255.255.0 Tunnel0 172.20.0.1 name "VLAN 70"
ip route 192.168.100.1 255.255.255.255 FastEthernet0/0 70.162.0.1 permanent name "CABLE MODEM MANAGEMENT"
ip route 0.0.0.0 0.0.0.0 FastEthernet0/0 dhcp 253
ip dns server
no ip http server
ip http authentication local
ip http secure-server
ip http timeout-policy idle 60 life 86400 requests 10000
ip nat translation tcp-timeout 300
ip nat translation udp-timeout 120
ip nat translation max-entries 2048
ip nat inside source list ACL-NAT-172.16.0.0/29 interface FastEthernet0/0 overload
ip nat inside source list ACL-NAT-MANAGEMENT interface FastEthernet0/0 overload
ip nat inside source static tcp 172.16.0.4 22 interface FastEthernet0/0 2227
ip nat inside source static tcp 172.16.0.5 3389 interface FastEthernet0/0 3391
ip nat inside source static tcp 172.16.0.3 3389 interface FastEthernet0/0 3390
ip nat inside source static tcp 172.16.0.4 80 interface FastEthernet0/0 8084
ip access-list standard ACL-ACCESS-QUIET
permit 216.161.180.16
permit 172.16.0.0 0.1.255.255
permit 172.27.0.0 0.0.127.255
permit 172.20.0.0 0.0.0.3
ip access-list standard ACL-NAT-172.16.0.0/29
permit 172.16.0.0 0.0.0.7
ip access-list standard ACL-NAT-172.17.0.0/24
permit 172.17.0.0 0.0.0.255
ip access-list standard ACL-NAT-172.17.1.0/24
permit 172.17.1.0 0.0.0.255
ip access-list standard ACL-SNMP
permit 172.16.0.4
ip access-list extended ACL-CRY-MAP
ip access-list extended ACL-INSIDE-IN
deny   ip host 172.16.0.2 172.27.0.0 0.0.127.255
deny   ip host 172.16.0.2 172.20.0.0 0.0.0.3
permit ip 172.17.0.0 0.0.0.255 any
permit ip 172.16.0.0 0.0.0.7 any
permit ip 172.17.1.0 0.0.0.255 any
ip access-list extended ACL-NAT-MANAGEMENT
permit tcp host 172.27.10.11 eq 3389 host 72.166.77.196
ip access-list extended ACL-OUTSIDE-IN
deny   ip 10.0.0.0 0.255.255.255 any
deny   ip 172.16.0.0 0.15.255.255 any
deny   ip 192.168.0.0 0.0.255.255 any
permit tcp any any range 3390 3391
permit udp any any eq bootpc
permit udp any any eq bootps
permit tcp any any range 2226 2228
permit tcp any any range 8081 8084
permit icmp any any echo
permit icmp any any net-unreachable
permit icmp any any host-unreachable
permit icmp any any port-unreachable
permit icmp any any parameter-problem
permit icmp any any packet-too-big
permit icmp any any administratively-prohibited
permit icmp any any source-quench
permit icmp any any ttl-exceeded
deny   icmp any any
deny   ip any any
ip access-list log-update threshold 10
logging history informational
logging trap debugging
logging 172.17.228.17
logging 172.17.228.10
control-plane
line con 0
exec-timeout 15 0
privilege level 15
logging synchronous
login authentication AUTH-LOCAL
line aux 0
login authentication AUTH-LOCAL
line vty 0 4
exec-timeout 60 0
privilege level 15
logging synchronous
login authentication AUTH-LOCAL
rotary 1
transport input ssh
scheduler allocate 20000 1000
ntp clock-period 17178311
ntp source FastEthernet0/0
ntp server 148.167.132.201
end

Hi Matt,
Try adding below line
ip access-list extended ACL-OUTSIDE-IN
permit udp any eq bootpc any eq bootps
Regards
Najaf
Please rate when applicable or helpful !!!

Trouble Connecting to Cable Internet

Recently I have been unable to connect back to the internet with my cable modem. A few months ago I tried using wireless internet from houses around mine and surprisingly it worked. (I realize this isn't TOTALLY legal.) Anyway, I have been trying revert back to the cable modem and nothing is working. I turn off the airport. I have restarted the computer. I have restarted the modem and waited the 15 minutes. I had unplugged the cable when I was using the airport obviously and twice I was able to plug it back in and it would work. This isn't the case anymore. I hadn't changed any setting so I'm not sure what the problem could be. Any help would be hugely appreciated.

Now when you plug your iBook directly into the modem, the internet works. Correct? Which Airport do you have? Try resetting your Airport. Below are some more links that should be useful...
Knowledge Base Document #106858 is the Airport Troubleshooting Guide
Knowledge Base Document #107451 on Resetting the Airport Extreme Base Station
Knowledge Base Document #106602, which explains How to Reset the Airport Base Station (Dual Ethernet)
Knowledge Base Document #58613 - Resetting the Airport Base Station (Graphite)
Airport Express FAQ
Knowledge Base Document #108044 on Resetting Airport Express
Knowledge Base Document #166602 troubleshoots I Don't See My Airport Network
I didn't know what Airport you had, so I included all of them. Select your model and try reseting it. If worse comes to worse, just do a Factory Settings Reset. You will have to configure it like you just took it out of the box. I have found that this usually fixes most AirPort problems.
Jon
Mac Mini 1.42Ghz, iPod (All), Airport (Graphite & Express), G4 1.33Ghz iBook, G4 iMac 1Ghz, G3 500Mhz, iBook iMac 233Mhz, eMate, Power Mac 5400 LC, PowerBook 540c, Macintosh 128K, Apple //e, Apple //, and some more... Mac OS X (10.4.5) Moto Razr, iLife '06, SmartDisk 160Gb, Apple BT Mouse, Sight..

Multiple sites ASA's connected to Cable modems with same DHCP address

I have several locations with an ASA 5505 installed behind a cable modem. The cable modem is issuing DHCP for the same network address range in these locations. I have the outside interface obtaining DHCP from the cable moden network and the asa's are receiving the same outside address. I have the remotes set to use EZVPN to create the VPN tunnel back to the head end ASA 5540. I am seeing constant rekeying for phase 2 for those remote sites. is there any thing I can do short of assigning each asa a unique outside address?

Dave
The Linksys doing NAT is the reason why the ASA sees all the traffic as having source address as 192.168.2.1. The only way for the ASA to see the original 192.168.1.x address is to change the Linksys to not do NAT.
One thing that I notice is that there is not a route statement in what you posted for the 192.168.1.0 network. It is not clear whether the route does exist and you did not post it or whether the route does not exist. But if it does not exist it would certainly be a reason why you lose Internet connectivity when you change the Linksys to not perform NAT. (the ASA would have no knowledge of how to forward to the network and would drop all the traffic). Try adding the route to the ASA and changing the Linksys to not perform NAT and let us know if it works.
HTH
Rick

Please help me connect eMac, cable modem, and Airport Extreme Base Station

I connected Ethernet cord from cable modem to Airport Extreme Base Station and then another Ethernet cord from Airport Extreme Base Station to eMac, but I could not get internet access on my eMac that way. I'm only getting internet access by directly connecting eMac to cable modem. Can someone please help me with a step by step explanation of how to set these 3 machines up so that I can have internet access on both my eMac and, wirelessly, on my new MacBook. Thank you very much in advance.
eMac & MacBook Mac OS X (10.3)
eMac & MacBook Mac OS X (10.3)
eMac & MacBook Mac OS X (10.3)

jenngee, Welcome to the discussion area!
Ensure that you power off the cable modem for a minute or so when you switch it to another Ethernet device.
Ensure that you are connecting the WAN port of the AirPort Extreme base station (AEBS) to the cable modem. The eMac should connect to the LAN port.
The steps for setting this up can be found in the "Designing AirPort Networks" (direct PDF link) document. Look through that document and try to get it setup. Then return here if you have more questions. Don't forget to post what you tried and the issues you encountered.

How to share internet connection from cable modem through built-in airport on imac?

I have a cable modem with ethernet going into imac. How can I share the internet connection using the iMacs built in airport with other computers that have airport cards?
I would love to put an ethernet router between the imac and the modem and share the internet connection using the iMacs built in airport with other computers that have airport cards as well.
Thanks!

The setup I had working is what I have connected to the internet now. A cable modem with one ethernet jack that plugs into the iMac. The airport from the iMac broadcast to my G5 with an airport card in it and received the internet connection. The PC received it the same way from the iMac but to a Netgear wireless adapter.
I messed things up recently adding a wired 4 port ethernet router between the iMac and the modem, so that the modem ethernet plugged into the router, and from the router, plugged into the iMac which then could receive the internet but no more airport connections to my other machines. Haven't been able to get it working since.

Airport express won't connect to cable modem

We recently moved to a new residence and just had internet service installed by a technician. Unfortunately, I didn't have my Airport Express handy while he was here, so he simply connected my Macbook Pro directly to the cable modem via ethernet cable. When I found my Airport Express, I disconnected the Macbook Pro from the cable modem and connected the Airport Express to the modem via the same ethernet cable and powered up. The Airport Express began flashing yellow but the flashing yellow never did turn the steady green that indicates the Airport Express is receiving the signal. I called my internet provider but they don't deal with router issues. What can I do?

Cable modems "remember" the device that is connected. Your modem is "remembering" your computer and looking for it when you connect the AirPort Express, so it will not connect to the AirPort Express.
You need to push the reset button on the modem and then power off the modem
Power off everything else on the network...all computers and devices
Wait 15 minutes
Make sure that the ethernet cable from the modem is connected to the AirPort Express
Power up the modem only and let it run 3-4 minutes by itself
Power up the AirPort Express and let it run a few moments
Power up each computer and device one at a time
Check for proper operation.
If...you are switching from a previous DSL service to cable, you may need to reconfigure the AirPort Express. Post back for more info on this.
Message was edited by: Bob Timmons

Unable to connect to cable modem

Hi, i own a Linksys Wrt54g. Its been working fine for the past year. I have abolutely nothing to complain about. However there seems to be a little problem with the UTP-5 connection to the Modem. My modem is a Motorola SurfBoard. I´ve been connecting my router to it using the supplied cable. Last week i wanted to bring the router closer to my actual workplace so i bought a 20 meters (not even close to the max lenght for a 802.13u cable) long UTP cat 5 cable.The cable works fine using a standart switch, but the router does not "sees" the modem, ie. The ip info from del ISp does not appear on the status tab, even though the Internet LED on the front is blinking. Could anyone tell me if this is a known problem?

no...its a regular cable.. i made it myself. Its already been tested. A few friends used it to play CounterStrike Source, so it is safe to asume that it works

Airport Extreme Cannot see Live Internet Connection from Cable Modem

Hi,
When I run a cable directly from my cable modem to my MacBook everything works fine. In fact, that is how I am connected to the Internet right now.
However, when I run the same cable into my Airport Extreme (AE) and then connect my MacBook to the AE (wired or wireless), the AE reports a problem connecting to the Internet. This is a new situation as everything has been working fine for months. I have changed nothing in this set-up for it to stop working.
I can only assume the at the AE is broken: the Internet connection is live, it was working fine for months and then stopped working. Is there anything I should try before I throw the AE in the garbage?
Thanks in advance.

Welcome to the discussions!
It appears as if you may not be aware that cable modems must be completely reset whenever the device that they are connected to changes. The reason for this is that the cable modem "remembers" the device that it has been connected to. In your case, it's "remembering" your computer and looking for it when you plug it in to the AirPort Extreme.
You need to make your modem "forget" your computer. Here's how:
o Push the reset button on the modem if there is one on your modem
o Power the modem down immediately after you push the reset button
o Pull the battery in the modem if it's easily accessible
o Leave the modem powered down at least 20-30 minutes (Some ISPs take longer)
Power down the rest of your network as well.
After the power down period, start the modem first and let it run 3-4 minutes by itself
Then start the Airport Extreme (you may need to "hard reset" the device again to start over on the configuration) and let it run a few moments
Then start your computers one at a time
Please post back on your progress. Remember, if you need to connect your computer directly to the modem again, you must reset the modem again because it will "remember" the AirPort Extreme if you have reset it correctly.

AE Lost Internet Connection through Cable Modem

I suddenly lost all internet connectivity. Here's the setup and issues:
-- Two computers, a Mini and a PowerBook, both lost connection to Internet
-- Motorola cable modem (using Comcast)
-- Airport Express is connected to modem via ethernet
-- I can connect directly to the cable modem with the computer via ethernet and I can get internet service; also, Comcast assured me I still have service
-- The two computers can connect to each other via airport; file sharing, iTunes streaming, etc., works as usual
-- I've done all the usual "unplug everything and restart" routines
-- Nothing was changed recently that I can think of - it just lost connection to the Internet.
Any ideas?
PowerBook G4 17 1.67GHz 1.5Gb Mac OS X (10.4.6)

I fixed it, but I don't know if it will solve the problem Ada had. I got a note from Comcast recently saying I needed to have my IP settings to be dynamic, by using DHCP. I had already made that change so didn't suspect that was the problem. However, after looking closely, I found some things to change.
If you're using Comcast, or a similar service, then this may fix it:
I first went out and washed my car, then came back in. I think that's an important step. I have a large car, so if yours is small, you may need to wash it twice, or wash it then wax it. Then go back inside and . . .
In Airport Admin Utility, select your base station, then Configure.
Switch to the Internet tab.
Make sure it's set to Configure using DHCP
Make sure DNS Servers, Domain Name, and DHCP Client ID are left blank (this is the step I hadn't done before).
Click Update and close the program and wait for your base station to reset.
This should fix it.

Intermitent Internet connection to Cable Modem

Internet connectivity was working great. Then I switched Internet access to DSL and thus converted Linksys WRG54G connection to a DSL modem. Due to poor speeds with the DSL, I have moved back to cable. Now the connectivity to the Internet drop from the Linksys router every few hours. Connectivity to the cable modem seems to be fine.
What reprogramming am I missing for the router. It is set up exactly as the direction require.
Thanks

Follow this link and if you are using to configure your router.

Trouble connecting to cable modem

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