Question about Linksys EtherFast Cable/DSL Router

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BEFSR81 Server and BOOTP Packet Vulnerability

A vulnerability has been identified with this router. Is there a solution for it?

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Re: BEFSR81 Server and BOOTP Packet Vulnerability

A flaw in the built-in DHCP server causes the routers to send BOOTP reply packets that contain sensitive information about traffic running through the devices as well as other random information about the router's configuration. New firmware to fix this issue is now available! See information on the Linksys site for upgrading to the new firmware.

Posted on Feb 16, 2006

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What is WPS button?

The WPS is abbreviation for Wi-Fi Protected Setup. This function should you help to set up strong wireless network password (so called "shared secret") by very easy way.
For most of users is very hard to create, remember and assign complex long password to Wi-Fi router and client devices e.g. smart phones, laptops, printers.
Short and simple (non-complex) password is weak and can be broken by hackers. You can set strong password using WPS buttons. No device management access is required.

Procedure description
Press WPS button on both devices you wish connect each other. (Router, wireless printer...)Wait until password is set automatically and devices are connected.There exists second procedure in WPS standard. It is similar to described one, but PIN number is required in addition.

Security warning!!!
Enabled WPS function is very high security risk. The WPS sets strong password, but offers another security hole to hackers. The WPS standard is affected by well known vulnerability and therefore is insecure. It is recommended to DISABLE WPS ON ALL DEVICES. Go to device setup and disable the WPS completely.

Jan 28, 2016 | Routers

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I have a Netopia 3347NWG-006 Router. I want to find my DNS server setting.

Click on this WEB site to check if your computer is infected with the DNS changer.

Jul 08, 2012 | Netopia 3347NWG-006 Router

1 Answer

My Netopia 3366ENT router stops responding after a while and my web server is not reachable anymore. No telnet connect possible

1. check with the ISP that you don't have an intermittent connection
2. check for packet loss.

Apr 18, 2010 | Netopia 3366-ENT Router

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Problem with firewall rules and access from WAN

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Aug 10, 2009 | Trendware TEW-432BRP 54Mbps Wireless...

2 Answers

Internet connection

1st check your cable with the tester 2nd configure your router then the last configure your connection go to control panel then network connection then right click local area connectn then properties one click internet protocol tcp/ip then properties check obtain IP add automatically then obtain DNS then start to connect again

Mar 27, 2008 | Linksys BEFSR81 Broadband Router with 8...

2 Answers

BEFSR81 admin problem when enabled uPNP

I actually FOUND the solution at the linksys community forum site. It's weird, and I quote [kiefmoon], "I beat my head against this issue for the past few months, for the same reason as you: I'd built out a Windows Home Server, which can configure a home router automatically via UPnP, so I happily enabled it on the router, only to be locked out of the web-based configuration page.

Good news though! I just figured out the cause of the issue -- and it's really dumb:
You turn on UPnP on the Passwords tab, right? Well, if you look around on that page, you'll notice that, along with the option to enable UPnP, there are two password fields filled with asterisks. I think most people would assume that if they don't change anything in those fields, then click Apply, that the password has not been changed. And they'd be wrong. I don't know what the password gets changed to at that point, but it's not "admin".

...So the fix is: when you enable UPnP, do yourself a favor and enter a password in those fields (ideally something sronger than "admin" ). That way, you'll actually know what the password is when you get prompted for it."

Feb 26, 2008 | Linksys EtherFast Cable/DSL Router

1 Answer

Xbox 360

Either the network connection between the 360 and router is not working correctly, or your router is not configured properly for DHCP.

DHCP (Dynamic Host Configuration Protocol) is a protocol that automatically assigns a network address (and some other settings) to your computer....or Xbox in this case. It works like this....when your Xbox connects to the network, it sends out a broadcast packet on the network that looks for a DHCP server. If a DHCP server is present, it responds. Next the Xbox requests its network address and other settings from the DHCP server. Your WGR614 router has a DHCP server function built in, but it may not be enabled. Try reconfiguring the router using the Netgear "Smart Wizard" installation CD and be sure to enable the DHCP capability, if asked.

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2 Answers

First packet in connection is not a SYN packet:

Verizon blocks port 80 traffic to residential customers. If you want to host a website, they expect you to pay for the business service and a static IP.

I am monkeying around with my DNS records on goDaddy to see if I can get http traffic to go to port 8080 instead of port 80. So far, I have not had any success.

I did find, which, for $25/year, will "host" a simple redirect for you, so that when people type in, it actually gets redirected to That :8080 does show up in the address bar, but I think that's okay. Especially for $25/year.

Nov 08, 2007 | Actiontec (5GE583000-01) Router

1 Answer


BOOTP stands for Bootstrap Protocol. DHCP stands for Dynamic Host Configuration Protocol. Both are mechanisms to dynamically assign an IP address for a TCP/IP client by the server. In this case, the Prestige 310 Internet Access Sharing Router is a BOOTP/DHCP server. Win95 and WinNT clients use DHCP to request an internal IP address, while WFW and WinSock clients use BOOTP. TCP/IP clients may specify their own IP or utilize BOOTP/DHCP to request an IP address.

Feb 19, 2006 | Zyxel Prestige 310 (AM406100) Router

1 Answer

AOL Broadband Cable

The following routers are the only models that support the AOL Broadband Cable service. Note: All Linksys routers support AOL DSL connections due to the standard PPPoE login and authentication connection type used with that service. Please be sure to check the version number of your router (which can be found on the underside label). Only the specific models and versions listed here are supported by AOL Cable: * BEFW11S4 * BEFW11S4 v2, v3, and v3.2 * BEFSR41 * BEFSR41 v2 * BEFSR11 * BEFSRU31 * BEFSR81 * BEFSR81 v2 * HPRO200 (Available from AOL only at this time) You must Enable the "AOL Parental Controls" option located in the Security tab of the web-based Setup utility pages of these routers in order to get a connection using AOL Cable. You may access the utility by visiting in a web browser and by logging in using the router's password (by default, the password is admin).

Feb 16, 2006 | Linksys HomeLink Phoneline (HPRO200)...

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