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What is ARP?
Address Resolution Protocol (ARP) is a protocol for mapping an Internet
Protocol address (IP address) to a physical machine address (MAC address)
that is recognized in the network.
ARP provides the protocol rules for making this correlation and providing
address conversion in both directions.
Why is this a problem?
The hardware defect or virus/worm generates tens or hundreds of thousands of meaningless replies per day. This traffic can impair performance for the user of the affected machine and other customers nearby.
Furthermore, many devices with this defect on the same network segment can disrupt operations or, in some cases, cause temporary outages.
If you are using a device that is creating high ARP traffic, please take action to repair this problem immediately.
Charter provides customers with antivirus and firewall protection with
our new Charter High-Speed Security Suite.
For detailed information about security precautions and how to download the
Security Suite, please visit Security Help at
www.charter.com/security.
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Important Information Regarding Your High-Speed
Internet Service |
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You may have received a letter from Charter instructing you to visit this web site.
We are contacting you because a problem has been detected that is
affecting your High-Speed Internet connection, as well as the
connections of other customers. A computer or router connected to
the cable modem on your account is sending thousands of invalid ARP
REPLIES to the network daily.
To prevent an interruption to your service, you must resolve this
issue as soon as possible.
If the problem persists and you do not
take action within ten (10) days from the date of the letter you received, Charter may temporarily suspend your
Internet service until the problem is repaired.
These invalid replies disrupt network performance. Charter's
Acceptable Use Policy explicitly prohibits system disruption.
Specifically, Section 8 states:
NO SYSTEM DISRUPTION - Customer will not use, nor allow others to
use the Service to disrupt Charter's network or computer equipment
owned by other Charter customers. Any static IP address must be
authorized and provisioned by Charter. Customer also agrees that
Customer will not use, nor allow others to use, the Service to
disrupt other Internet Service Providers or services, including but
not limited to e-mail bombing or the use of mass mailing
programs.
Please refer to this information to correct the problem:
1. Router Defect
If you are using a router or wireless router, please verify your
model. If you are using one of the models listed below, the
firmware installed on that router may be defective. If your router
is not listed below, go to your manufacturer's web site and check
if a firmware upgrade is available for your model
router.
| Linksys® Models Affected |
Needs Firmware Version (or higher) |
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BEFSR41 v3 |
1.05.00 |
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BEFSR81 v3 |
2.50.2 |
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BEFVP41 v2 |
1.01.04 |
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BEFW11S4 v4 |
1.45.3 |
Click
here for instructions about how you can
check the firmware version on your router and update the
firmware, if necessary.
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2. Check Your Computers for Worms or Viruses
Follow these 3 steps to ensure that all of your computers are
secure:
- Install a Personal Firewall
- Keep Your Operating System Up to Date
- Use Antivirus / Anti-Spyware Software
Please contact us if you have any questions regarding this notice.
You can reach us by phone at (866) 229-7289, Monday through Friday 8AM - 8PM (Central Time), Saturday and Sunday 8AM - 5PM (Central Time).
Thank you for your cooperation.
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