arris 820a manual

These detailed instructions will guide you through troubleshooting general connectivity issues with your Broadband Cable Modem. Note: This should be the coaxial cable installed by your cable provider specifically for the cable modem. If you have a router you should connect your computer to your router and connect your router to your modem. Connect the power cord to your broadband cable modem and a wall outlet.

If you have a router you should connect the power cord to your router and a wall outlet. Your broadband cable modem's status lights should begin to flash as your broadband cable modem connects. Within a few minutes the cable modem should be online.

Specific light patterns for your cable modem. If you connected your broadband cable modem via USB you will need to install USB drivers for your broadband cable modem. Connectivity issues? Power — LED will be solid green when the power supply is properly connected to the modem and the wall outlet 2. Cable — LED will flash when data transfer occurs 4. Ethernet — LED will flash when data transfer occurs via Ethernet.

Receive — LED will be solid when connected 3. Send — LED will be solid when connected 4. Online — LED will be solid when connected 5. Activity — LED will flash when data transfer occurs 6. Standby certain models — LED will be solid when modem is in standby mode. PC — LED will be solid if link is established between modem and computer 3. Status — LED will be steady when online. Data — LED will flash when data transfer occurs 4. Cable — LED will be steady when online.

Data Receive — LED will flash when data transfer occurs 3. Data Send — LED will flash when data transfer occurs 4. Cable — LED will be steady when online 5. PC — LED will be solid if link is established between modem and computer. RF — LED solid green when modem is online 3.Do you need an Arris modem password? Well then, you came to the right place! As usual when I get a new technological gadget, I had to explore it. A bit of googling provided the answers I needed: apparently this device had a different password every day and I found a couple of pages with a list of passwords of the day, as well as a page with a password generator no longer available for the TMA model which seemed to work fine for the TMA.

So I brought the matter into my own hands and I wrote my own arris password of the day generator. You can use the online generator to generate one or more passwords. You can use my Android application. Pull requests are welcome!

If you want the password for the current day, just call arrispwgen with no arguments:. To get the password for a given day, pass arrispwgen the date for which you want the password. For example:. In case you need to use a custom seed you can pass the --seed or -s argument:. This is a list of known modems for which this password generator generates valid passwords. If you know other models that work, please let me know in the comments below. The first and simplest is to check the date on your modem.

The second simplest thing is only an option if your modem asks for a username and a password. You can try the known default passwords for Arris modems.

You can also try using T! Some modems might be tricked into using the default seed for their password generator if you disconnect the coaxial cable and reboot your modem. Give that one a try. One detail about this technique is that since your modem will be disconnected from the internet, you might not be able to do much with it.

The last option is the tricky one, and involves fiddling with a command line and some more advanced tools. If none of the above options worked, or if your modem just asks for a password of the day without any username, chances are your ISP changed the password generator seed in your modem. Some time ago I found an exploit that works for getting the admin interface password from the modem and it might also work for getting the seed.Perfect for low-bandwidth households.

With fast download speeds and 1-Gigabit Ethernet port, the SB is an affordable option for your home network.

arris 820a manual

The SB is an economical choice for your home network. It supports IPv6 — the latest internet standard and is compatible with major U. Cable providers. So, what are you waiting for? Plus, the Wi-Fi modems with McAfee Protection utilize the McAfee Secure Home Internet App with added features like managing settings by user profile, and providing notifications of new users attempting to access your network. This app removes the barriers to being informed about your Wi-Fi network and the devices connected to it.

In fact, it was designed to. Great products are only as good as the people that stand behind them. We provide free chat and email support, and free phone support for products under warranty. Support Support Resources Documents, links, and contact information. FAQs Answers to your frequently asked questions.

Compatibility Check your device compatibility with cable Internet Service Providers. What makes us a leader in home connectivity? Search for:. A perfect fit for your home network. Setup Wizard. Wi-Fi Manager. Device Management. Parental Control.

Troubleshooting Your Modem

Wi-Fi Speedtest.D-Link Forums. Please login or register. Generai If the ISP modem has a built in router, it's best to bridge the modem. If the modem can't be bridged then see if the modem has a DMZ option and input the IP address the router gets from the modem and put that into the modems DMZ. Arris modems seem to be notorious for not working well with external routers.

One reason, some of the Arris modems already have a built in router. These modems can't be bridged like DSL modems.

Installing and Activating Your DOCSIS 3.1 SURFboard Cable Modem

This will help bypass any Arris modem management and processing and should open up everything to the external router. I have seen some cases that ISPs lock down the Arris modems web page from users. Is some cases, changing out the Arris modem for a different mfr modem is preferred, depending upon if the ISP allow customers to bring there own modem or not and if a customer has Voice Phone services thru there ISP which requires the use of Arris modems.

In some cases the Arris modems are stand alone modems with out any built in router. In some cases, most of these modems can be connected to external routers and do work well with out any problems.

Then some cases we've seen some odd behavior between the Arris modem and external routers that seem to have no resolution. Something thats just not compatible or seems to be an ISP issue. In these cases general connections should work if the Arris modem connects to the external router. Sometimes MAC Cloning can be used on the external router to make the connection work well between the Arris modem and external router. Other troubleshooting may need to be one with the ISP. Shortest length possible is preferred.

Sometimes line signal levels from the ISP service box to the customer building needs to be checked. Also using TV line splitters will lower line levels to the ISP Modem thus making the entire system not work well and makes customer think it's the routers fault when the problem lies upstream from the router and with the ISP service, lines and modem.

Check for t. Connecting to the ISP modem could result in a false positive as the signal to the modem could be just enough to that point then adding on a router, could see problems. The router operation is dependent upon getting good data flow from the ISP modem and the modem is dependent upon getting good signal from the ISP Service.

Over all, if you can avoid using Arris modems as your ISP modem and use something else is preferred.

arris 820a manual

If the Arris modem and external router are connecting and working well for you then you should be good to go. Just be aware of the above mentioned items.

Check with the ISP and check here in the forums about getting some information and help.Page of 47 Go. Table of Contents. Get ready to experience the Internet's express lane! Whether you're checking out. The Touchstone Cable Modem provides an Ethernet connection for use with either. Installation is simple and your cable company will provide assistance to you for any.

arris 820a manual

The links below provide more detailed instructions. Safety Requirements. Getting Started. Using The Cable Modem. Show quick links. Hide Hide permanently. All other trademarks and registered trademarks are the property of their respective hold- ers. No user serviceable parts inside. Page 6 CE marking in accordance with the above applicable Direc- tive s. Page 7 5. Turning the switch OFF disables the device. Turning the switch OFF is recommended only during vacations or similar extended absences.

Page 9: Items You Need Information packet: your cable company should furnish you with a packet containing information about your service and how to set it up. Read this in- formation carefully and contact your cable company if you have any ques- tions.

Page 13 If you connect your Cable Modem to a wireless LAN, make sure you enable security and encryption on the wireless hub for the same reasons that you should run only secured proxies. Consult the documentation and technical support of the wireless equipment provider for help. You need only follow the instructions in this section to install and connect the Cable Modem. Cable: connector for the coax cable.

D Power: connector for the power cord. The power cord must reach the outlet without stretching and without adding extension cords. Note: If you are connecting to a computer, use the Ethernet cable included in the Cable Modem package. Page 19 Ethernet connection on your operating system. Note: If your computer has more than one Ethernet card, you may have to select the appropriate Ethernet card in the Connect using: area of the Local Area Connection Properties window.

You may have to restart your computer in order for your computer to obtain a new IP address from the network. The Local Area Connection Status widow displays. Click Properties. Then click Properties. Open the Vista Control Panel.

Page 26 Click Manage network connections.Overcable customers are affected by this, and according to Rodrigues, the vendor hasn't committed to fixing the software flaws yet. Arris cable modems are used by some of the largest U. This backdoor actually dates tobut Arris never fixed it.

The default password for the SSH user "root" is "arris. While the researcher was analyzing the backdoor, he discovered that there was another backdoor inside the first backdoor. Once accessed, a full busybox session is opened, giving the attackers even more capabilities.

Rodrigues was asked by the vendor not to disclose the password generating algorithm, but he didn't think this will do much to slow down attackers, considering the extent of the vulnerabilities in these Arris cable modems. Rodrigues believes that if modem software can't be open sourced so everyone could audit the software in their modems, as Vint Cert and others recently suggestedthen researchers should at least be allowed to reverse-engineer modem firmware.

This way, white hat security experts could find and help fix more security issues in our modems without being potentially liable to lawsuits against them by the modem companies who don't want their vulnerabilities exposed. He writes news stories on mobile, chipsets, security, privacy, and anything else that might be of interest to him from the technology world. See all comments So glad my model number isn't listed As above, I'm glad my SB isn't on that list.

This is pretty negligent on the part of ARRIS; however, at least there are some good natured and intelligent people out there to catch things like this and elicit change. Get a Zoom modem. They seem to work better than Motorola or Arris modems. Is there anything that can be done, in the meantime, for those of us with one of these modems? I have no money to replace a cable modem, and I doubt TWC will issue me a new one because this one isn't secure. I am an engineer for a US top ten cable company, and we were given access to the firmware fix for this issue before this article was even posted.

The amount of fear mongering in this post is disappointing. Arris came to us and told us themselves and then had the new firmware sent to us two days after. There will be some needed testing of the firmware, but the article is completely wrong about saying Arris hasn't acknowledged or worked to fix this. If your LAN is secure, then you just need to avoid going to untrusted sites.Joinsubscribers and get a daily digest of news, geek trivia, and our feature articles.

Unbeknownst to most people, cable modems and other broadband modems have diagnostic and logging functions built in, just like routers. While some people do occasionally peek at the control panel of their router, very few people ever look at their modems—or even realize they can do so.

So why look at the diagnostic page and logs of your cable modem in the first place? Or maybe your internet connectivity drops out intermittently and no amount of tinkering with your router has solved your problems. By accessing the tiny little web server hidden inside your modem and reading the diagnostic pages, you can learn a ton of things about your modem and connection like general status, signal strength, and event history via the system log.

We want to emphasize that last part. In order to not interfere with the common address pools that are doled out by residential routers such as X and Not all modems use the exact same address, but many do. There you can narrow your search down by brand and model number to find the address of your modem and any default login information you may need.

Once you have access to the diagnostic panel, there are some basic things you want to look at: the modem status, signal strength, and the activity log. While there may be additional pages to investigate like the general configuration of the modemthese settings are generally not user-editable.

And even if they were, the settings are so arcane and ISP specific that they are of very little diagnostic use to most users.

Everything on the general status page should look positive. The other very important thing to look at on the main status page is the system up time. The up time should reflect your experience with the modem. If you reset the modem by power cycling it four days ago, then the up time should reflect four days and change worth of operation.

In the screenshot above, you can see the general status page for our modem. Everything looks great and the up time, although short, does reflect our interactions with the modem: after this new modem was provisioned a day ago we power cycled the device.

Modem logs are pretty arcane like most logs. You can always search online for specifics codes to get a clearer understanding of what is going on if need be.

Arris Touchstone CM820 User Manual

If we look at the log of our modem, shown above, we can see that everything is currently super smooth sailing. Ideally, your log should be boring and you should see very little activity other than the time it boots up, a rare error here or there because no system is perfect and your modem will occasionally fail to connector a rare bit of downtime because your ISP pushed out new firmware. If a bad connection, splitters on the coaxial lines, or even old television amplifiers are dropping the signal below or pushing the signal above the operating range, then you may experience a connection problem.

But as a general rule, consider the following values when debating whether or not your physical lines and the connection to the provider are a problem.


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