Networking

Ask computer networking questions and get answers ASAP

Ask a Computer Expert,
Get an Answer ASAP!

This answer was rated:

I have a Surfboard SB6180. When I connect it to a router,

the downstream appliances get no...
I have a Surfboard SB6180. When I connect it to a router, the downstream appliances get no internet. I get internet if I connect directly from the cable modem to my ethernet port on a laptop. But I've noticed that the cable modem is also giving out IP addresses to dozens of devices that are not on my network. Are they from neighbors? Is Cox showing me what's on my neighbors' connections? I can ping some of the devices. I'm worried about the security of this.
Show More
Show Less
Ask Your Own Networking Question
Answered in 15 minutes by:
5/31/2017
Martin
Martin, System Administrator
Category: Networking
Satisfied Customers: 3,123
Experience: 10+ Years Experience CCNA Network Engineer A+ Net+ Linux & Windows OS C++ Programming
Verified

Hi, my name is ***** ***** I will do my best to help you today. To make sure I don't miss anything, please give me a minute to review your question.

Ask Your Own Networking Question

May I know the model of the router?

I would try resetting the router first, to see if it's able to get an IP address from the modem - once that has been achieved you can set a password ***** the wireless network.

Ask Your Own Networking Question
Customer reply replied 1 year ago
SB 6180. I'm not even working on the wifi. I just want my wired network to function. I have a switch downstream from the cablemodem. The Cox tech tells me that it won't do DHCP itself, which would explain the problem. Is that all it is?
Customer reply replied 1 year ago
I think I found my answer. Let's cancel this.

The problem is most probably DHCP related - but if your modem wasn't giving out a DHCP address, your computer wouldn't be able to connect directly either

Ask Your Own Networking Question

Of course, you can connect directly to the router via ethernet and configure the LAN settings manually, with an IP address in the range of the modem's and set the default gateway as the modem's network IP

Ask Your Own Networking Question
Customer reply replied 1 year ago
I don't see anything to configure the DHCP in the cable modem. If it just gave out DHCP automatically, that'd be fine. But it does all sorts of screwy things instead. I think I'll just park an old wifi router, with the wifi off, between the cable modem and the rest of the network.
Customer reply replied 1 year ago
Cox says that cable modem will only dispense ONE IP address.

The cable modem only has to dispense one IP address either way, to the router - the router can then give out a DHCP lease to the rest of the computers in your network

Ask Your Own Networking Question
Customer reply replied 1 year ago
Right. I just don't have a router in that stream now. I thought I could just put it into a switch and it would pass on addresses. It did for a little while. I'm not sure why. But it quit. I think I'll just add a router.
Customer reply replied 1 year ago
I have to leave now, on an errand. I will be available again at around 4 pm—in about 90 minutes. Thanks.

It should do that with a switch or a router - but the switch/router needs to have DHCP enabled for the rest of the computers to get a connection to the modem.

Sure, no problem.

If you could take a moment to rate me for my time so far by clicking on one of the stars at the top of this page, then Submit, it would be greatly appreciated

Thank you

Martin
Martin, System Administrator
Category: Networking
Satisfied Customers: 3,123
Experience: 10+ Years Experience CCNA Network Engineer A+ Net+ Linux & Windows OS C++ Programming
Verified
Martin and 87 other Networking Specialists are ready to help you
Ask your own question now
Customer reply replied 1 year ago
Thank you!
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a network technicianLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Martin Your Own Question
Martin
Martin
Martin, System Administrator
Category: Networking
Satisfied Customers: 3,123
3,123 Satisfied Customers
Experience: 10+ Years Experience CCNA Network Engineer A+ Net+ Linux & Windows OS C++ Programming

Martin is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

I am very happy with my very fast response. Eric is very knowledgeable in the subject area. Thank you!

RPAustin, TX

My Expert answered my question promptly and he resolved the issue totally. This is a great service. I am so glad I found it I will definitely use the service again if needed.

One Happy CustomerNew York

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

< Previous | Next >

Meet the Experts:

Claws224

Claws224

IEEE Network Engineer

1,256 satisfied customers

IEEE, Microsoft

Kevin

Kevin

LAN/WAN Specialist

1,165 satisfied customers

Certified MCSA and MCP Network Administrator with over 20 years of PC experience.

Byron

Byron

PC Support Tech

677 satisfied customers

CCNA, A+, MCSE 11 years at a large law firm.

Eric K.

Eric K.

Network Administrator

510 satisfied customers

13 years of desktop, server and network support experience

Mr. Clark

Mr. Clark

Network Engineer

510 satisfied customers

Computer Business Owner / Former DoD Network Specialist

Chris L.

Chris L.

Support Specialist

448 satisfied customers

Certified Networking expert with over 10 years experience.

Kamil Anwar

Kamil Anwar

Certified Networking Engineer

433 satisfied customers

8+ Years of Experience. / CCNA (S), CCNA (W), CCNA (RS), MCTS, MBCs.

< Previous | Next >

Related Networking Questions
My wifi network won't appear on my computer. I've got a
My wifi network won't appear on my computer JA: Are you able to connect using an ethernet cable? Customer: no JA: Which lights are colored and/or blinking on your router? Customer: i've got a whole bu… read more
Jason Jones
Jason Jones
AAS Information Technology
6,327 satisfied customers
My internet connection is Cable WiFi coming into an Arris
My internet connection is Cox Cable WiFi coming into an Arris Surfboard SBG6580. This feeds my Linkski (not Linksys) 16 port router (IP address 192.68.0.1). From this, I feed my hardwired computers an… read more
Drew
Drew
101 satisfied customers
My Router is a D-link DI 624. The Comcast cable plugs into
My Router is a D-link DI 624. The Comcast cable plugs into the modem; ethernet cable from modem to router and ethernet cable from router to Computer (iMac). I changed from a Motorola Surfboard DOCSIS … read more
robert
robert
Bachelor's Degree
2,594 satisfied customers
Motorola Surfboard to Asus RT N56U worksMotorola Surfboard
Motorola Surfboard to Asus RT N56U works Motorola Surfboard to Netgear 105 to Asus RT N56U doesn't.… read more
R.A. McConnell
R.A. McConnell
Owner
Associate Degree
505 satisfied customers
I have a netgear wireless router, WN802T. I connect to the
I have a netgear wireless router, WN802T. I connect to the internet and it works for anywhere from 10 minutes to an hour, then the internet connection goes away and it tells me I have "limited connect… read more
robert
robert
Bachelor's Degree
2,594 satisfied customers
I am trying to set up a wireless network in my house. We have
I am trying to set up a wireless network in my house. We have internet from Cox Cable, and I am on line when I connect directly to their Surfboard. When I connect to the Belkin N600 AV and connect dir… read more
Viet - Computer Tech
Viet - Computer Tech
Computer Technican
Bachelor\u0027s Degree
974 satisfied customers
I am trying to expand the network in my home by adding a second
I am trying to expand the network in my home by adding a second router. I set up the one with the ip address of 192.168.0.1 (to modem) and the second is set to 192.168.0.2. The DHCP ip address range i… read more
RandyNetwork Tech
RandyNetwork Tech
1,754 satisfied customers
Both computers connect to my wifi network but nothing will
Both computers connect to my wifi network but nothing will open. We can connect to a neighbor's unsecured network and have full internet service.… read more
Chris L.
Chris L.
Support Specialist
Vocational, Technical or Trade Scho
448 satisfied customers
i am trying to connect my cable modem to several cat5 pre-wired
i am trying to connect my cable modem to several cat5 pre-wired outlets uusing a dynex dx-ehb4 hub. only one ethernet port is working. i have four total… read more
Mac Tech
Mac Tech
IT Consultant
Bachelor\u0027s Degree
1,100 satisfied customers
When I connect my computer directly into the modem (hardwired)
When I connect my computer directly into the modem (hardwired) the connection is perfectly fine. When I connect my computers using my wireless router (a linksys E1200 which I JUST BOUGHT) I get lost p… read more
Mr. Clark
Mr. Clark
Network Engineer
Bachelor's Degree
510 satisfied customers
I have a Linksys wireless G 2.4GHz broadband router modelWRT54G
I have a Linksys wireless G 2.4GHz broadband router modelWRT54G that appears to have stopped working. Cox, my internet provider, tried to walk me through correcting the problem (for the second time), … read more
Viet - Computer Tech
Viet - Computer Tech
Computer Technican
Bachelor\u0027s Degree
974 satisfied customers
need help. can connect to internet via wireless on my laptop,
need help. can connect to internet via wireless on my laptop, but my desktop pc running through the same modem, but via a cable will not connect.… read more
Mr. Clark
Mr. Clark
Network Engineer
Bachelor's Degree
510 satisfied customers
I own a Netgear N300 Wireless Gigabit Router and have lost
I own a Netgear N300 Wireless Gigabit Router and have lost the internet connection through it (this was working previously with mac address spoofing). I am able to connect to the internet while connec… read more
David L.
David L.
Bachelor\u0027s Degree
6 satisfied customers
We purchased the E1000 router yesterday. The SN is CVN11K7N1180.
We purchased the E1000 router yesterday. The SN is CVN11K7N1180. We are trying to set up a wireless connection between the E1000 router and a Comcast SB5101 Motorola Surfboard modem. The message indic… read more
Network Advisor
Network Advisor
Network Administrator
Associate Degree
240 satisfied customers
I just moved my Linksys router, unplugged everything and when
I just moved my Linksys router, unplugged everything and when I was set up in a new location, plugged it all back in and it doesn't work. I've tried re-setting everything. My wireless light is not lig… read more
Mr. Clark
Mr. Clark
Network Engineer
Bachelor's Degree
510 satisfied customers
what are the proper connections for SRX200 linksys router.
what are the proper connections for SRX200 linksys router. I had workers in the house and the wireless computers cannot connect. I screwed up and every one is real mad at me.… read more
Tom F.
Tom F.
Network Consultant/Technician
Bachelor\u0027s Degree
25 satisfied customers
Erik, that didnt work--now I get a network cable unplugged
Erik, that didn't work--now I get a 'network cable unplugged' message. I have plugged my computer directly into the surfboard as you suggested, which is how I'm online again. If you can advise one mor… read more
Erik B.
Erik B.
Network Engineer
Associate Degree
4,134 satisfied customers
I cant get my new WRT160N router to connect to the Internet.
I can't get my new WRT160N router to connect to the Internet. I have 3 wireless devices all communicating wirelessly with the router just fine, and I've checked all the connections several times, but … read more
Ryan B.
Ryan B.
Desktop Support Technician
High School or GED
1,720 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x