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This FAQ text is copyright dslreports.com
Reproduction of all or part only with our permission..
This FAQ is edited by: LBB See Profile
It was last modified on 2008-01-02 13:43:17

1.0 About this FAQ

Cayman Doumentation

Cayman Documentation

use the "Broadband Equipment" Link

Where was this information found?

Some of these entries came straight from the official Cayman FAQ for the sake of continuity, whereas other entries are original works by dslreports members. If you have any questions about this FAQ, you can contact LBB See Profile or removed See Profile.

2.0 General

How do I clear the configurations through a Telnet Session?

1. Open up the Command Prompt and type in: telnet
the default LAN IP has not been changed)
2. At the Cayman Prompt type in clear
3. You will be prompted to confirm yes/no
4. Type yes and hit enter
5. The Cayman will clear its configurations back to factory defaults.
6 Type restart

How do I access my Cayman router?

There are three ways to gain access to the Cayman configuration interface, Web Browser(HTTP), Telnet Session and Maintenance Console.
All three procedures are discussed here in detail. The Telnet Session and Maintenance Console procedures are a little more demanding because it requires a little knowledge of the Command Line Interface.

By far, the easiest way to gain initial access to your Cayman Router is to browse into the web interface. If the router has never been configured, it will, by default, have an ethernet IP address of; subnet mask It will also act as a DHCP Server, automatically giving out IP addresses starting at
If you wish to use DHCP and want the Cayman to assign an IP Address, Subnet Mask, Default Gateway and DNS to your workstations (in Windows), select the options to "Obtain IP Address Automatically" and leave the Default Gateway section empty.

To see if you can access the Cayman configuration interface, open your web browser and put into the URL bar. Another option to try would be http://cayman-dsl.
If you pull up a Cayman menu or password prompt, you have, for the most part accomplished your goal covered in this FAQ. To move onto the Password Challenge, please refer to this FAQ.
If the connection times out, read on!

Each possible problem (listed below) can be overcome with determination and time. The simple and time saving solution would be to acquire a DB9 male to DB9 female serial cable and set up a connection profile in a terminal emulation program. Hyperterminal is one such emulator and it comes standard on all Windows Operating Systems and can be easily configured. The instructions to perform a full reset to factory default removing any old settings a previous owner may have configured can be found here under option 2.

If you don't care for the simple route, then read on.

Possible reasons for not being able to gain initial access to your Cayman Router:

1. The Cayman Default IP Address may have been changed to something other than

    Possible Solution:
      Open a Command Prompt by going to Start > Run > and type in CMD and click OK. In the box that opens up, type in ipconfig and hit enter. Look for "Default Gateway" and that should be the IP Address of the Cayman. Use this IP as the URL in the web browser as explained above and you should be at the challenge screen.

    Possible Solution2:
      Try to open a Telnet Session. Follow these instructions
      Open up the Command Prompt and type in: telnet (or IP obtained from ipconfig command from above example) and hit enter.

      If you get a Prompt to Login, then the problem could be the Cayman Web (HTTP) port may have been changed. See step 2 below to correct.

      Another possible reason you gain access from the Telnet Session and not the Browser could be the Security Settings in your Web Browser are set too high. See step 4 to correct.

      If you did NOT get a Login Prompt, a possible solution would be Step 3

    2. The Cayman Web (HTTP) Port may have been changed to something other than 80.

      To correct the Web (HTTP) Port number, follow these instructions.
      Telnet back into the Cayman
      From the Prompt,
      Type in configure and hit enter
      Type in set servers web-http and hit enter
      Type in 80 and hit enter
      Type in save and hit enter
      Type in quit and hit enter
      Type in restart and hit enter
      Once the reboot completes, you should be able to Browse into the Cayman.

    3. The Cayman LAN Administration may have been disabled which will not allow any access to the Cayman from the Browser or Telnet.

      To correct the LAN Admin being disabled, follow these instructions.
      Hook up a Serial Cable to the Cayman and the Serial (Com1) Port on back of your PC.
      Set up a connection profile in a terminal emulator program (Hyperterminal is what I use).
      Settings will be: 9600, 8, N, 1, none
      Connect to the Cayman.

      Once the connection is made, hit enter until you get login:

        At the Cayman-DSLxxxxx prompt:
        Type in configure then hit enter
        Type in view ip ethernet A restrictions then hit enter
        if it is set to"admin disabled" correct with the following
        Type in set ip ethernet A restrictions then hit enter
        you will see the following choices:
        {none|admin disabled|admin only}

        Type in none then hit enter
        Type in save then hit enter
        Type in quit then hit enter
        Type in restart then hit enter
        after the reboot, you should be able to browse back into the Cayman

    4. Your current Browser Security Settings may have been set too high.

      Possible Solution:
        Set your browsers security level back to "Default Level"

    Happy Surfing!

How can I backup my Cayman Router Config File?

The procedure(s) for backing up a Cayman Config file is outlined HERE

How do I forward ports?

Please see this link.

Can I Remotely Manage My Cayman?

This feature is enabled by default. It can be very handy for remotely adding software features, updating firmware, or just to simply pull the stats. In short, anything you can do locally via the web browser, you can do remotely.

To verify that it is enabled on your Cayman 3220-H, 3341, 3346, 3546 or 3547W, simply follow these steps:

1. Browse into your cayman and goto configure.
2. Go to WAN, then WAN IP Interface.
3. From the Restrictions drop down box, choose NONE.
4. Click Submit.

It is highly recommended that you change your web server and telnet ports from factory default. If you do not wish to change your port numbers, go to step 10.

5. Go to Configure.
6. Choose Advanced.
7. Choose Internal Servers.
8. Change the Web and Telnet Server ports to any other port number not used by Pinholes.
9. Click submit.

10. Click the Yellow Triangle in the Upper right corner, choose save and restart.

Once the router reboots, you will be able to remotely access it using any web browser or Telnet client. If you changed your web port to 8080, you would need to append this to your address like this: This ip would of course be your WAN ip.
The same applies for Telnet sessions.

3.0 How to Setup and Configure

How can I reset my Cayman's password?

Follow these directions to reset the Cayman password. This will also set the Cayman back to factory default, meaning none of the previous setting will be saved.

    • Hook up a Serial Cable (DB9Male to DB9Female) to the Cayman and Serial Port (Com 1) on your machine.

    • Set up a connection profile in a terminal emulator program ( Like Hyperterminal). Settings will be:
    9600, 8, N, 1, none.

    • Connect to the Cayman. Once the connection is made hit enter until you get login:

    • Unplug the powercord and then plug it back in.

    • As the Cayman restarts you'll see messages similar to this:
    Cayman PROM Console vX.X
    Cayman-3220 serial XXXXXXX(bootflags 0x1000000)

    • When you see the question "STAY IN EPROM?", hit the Y key a few times. You should come to "CaymanPROM>" or "BootPROM>".

    • Type "erase options" and hit enter.

    • You will be asked, "are you sure?". Type yes and . Make sure you spell out "y-e-s".

    • The options will be erased and you need to type "boot". This will restart the Cayman with the new, clean settings.

After doing these steps you should be able to surf into the Cayman like normal and input your settings.

Originally posted by LBB

How do I configure advanced security settings?

These instructions are written for Cayman software version 6.3. The same functions can be accomplished in older releases, as well, but the step-by-step instructions would differ.

1) Disable WAN administration to prevent outsiders from gaining control of your LAN:
Connect to the Cayman as 'admin'. Select Configure, then WAN, then "your connection type" (in the "WAN IP Interfaces" box). Then, in the Restrictions control, select "Admin Disabled". Then, you should get a yellow warning icon in the top right of your browser window. Click it, then click the thing that comes up to save your changed settings and restart the Cayman.

2) If WAN administration is not to be disabled, change the name of the SNMP community from the default of 'Public', again to prevent outsiders from gaining control of your LAN:
Connect as 'admin', select Configure, then Advanced, then SNMP (in the Services box). In 'Communities', type a name that only you will know. Just about anything, e.g., 'housebat' or some such nonsense. Click the Add button. Then, select the 'Public' entry and click the Delete button. Save the settings and restart the Cayman.

3) Enable a non-existent default server to trap any unwanted outside server requests:
Connect as 'admin', select Configure, then Advanced, then Default Server (in the NAT box). Check the 'Enable Default Server' box and enter an IP address in the 'NAT Server IP Address' box. The IP should be within your DHCP range, but one that would never be assigned to an actual computer, e.g., Click the Submit button. Save the settings and restart the Cayman.

What phone cord does my Cayman 3220-H use?

First, a primer:

Most standard telephone wall jacks are wired with 2 "pairs" of wire to handle two different phone numbers. These pairs are sometimes referred to as the "inner pair" (or line1) and the "outer pair" (line2). By default, the wall jack should be wired so your primary/main phone number uses the inner pair. Your 3220-H (the "newer" one with the blue box logo on the front) is expecting the DSL signal to be present on the outer pair. It should have come with 2 phone cords, one blue and one green. Which one you use is determined by which pair in the wall jack has the DSL signal. Put another way, which line/phone number is subscribed to your DSL service.

To determine which cord to use:

Does your residence have more than one phone number?

If NO, then use the BLUE cord. Note that it is labeled as to what end to plug into the modem.

If YES, is your primary/main phone number the one "subscribed" for DSL service? If YES, use the BLUE cord as above, otherwise use the GREEN.

Can I use my 3220H for Videoconferencing, MSN Messenger, etc?

The problem with all Audio/Video streaming applications is they use dynamic ports. The only thing you may be able to do is run a single NetMeeting session outbound (Cayman can be configured for NetMeeting). This would mean that only the PC behind the router could go out, not the other way around. Also the receiving computer would have to be configured as a NetMeeting server for this to work. It is really important that you understand that this is *one-way only* outbound only, one session only.

This isn't a very desirable solution. Because of the inbound/outbound nature of your desired app, plus the wide range of dynamic ports being used, it is difficult to make this work with any NAT-based router solution, IF you're using standard Dynamic IP addressing.

SOLUTIONS - The alternatives remain temporarily putting the Cayman in bridged mode, turning off NAT and making it function similar to a modem, OR setting up dedicated Static IP to your PC from your ISP. -- Since you want to use this for a one-time only application, maybe bridged mode is the way to go (change back the configuration afterward).

Original answer provided by Gandalf99.

More info can be seen here: »www.microsoft.com/WINDOWSXP/pro/ ··· ault.asp

How do I disable NAT?

To Disable NAT in the Cayman Internet Router, follow the instructions in Cayman Quick Guide CQG_015.

4.0 Specific ISP questions

[BellSouth] How do I configure my Cayman to work with Bellsouth?

The Cayman 3220-H Configurations using 5.x Firmware for Bellsouth can be found here:
Bellsouth 5.x Configuration


**NOTE** These settings are to help you set up your Cayman 3220-H, 3546 or 3547W from Factory Default to BELLSOUTH FASTACCESS INTERNET SERVICE. If you have purchased a Cayman from a Company or Individual (Previous Owner) other than Bellsouth Fastaccess, you may want to start by clearing the Configurations back to the Factory Defaults. This will clear out any old settings and allow you to start fresh!


Login into the Cayman via your browser by typing in in the Address bar and clicking goYou will need to login with

At the top click Configure

You will need to Configure the following items displayed for Bellsouth



On menu select
Quickstart--- You will need to add your FastAccess Username(with the
@bellsouth.net at the end) and FastAccess Password here and click the Submit button.

**Now you will see a little Alarm symbol in the top right corner IGNORE it for now!!

Good, we are done with Quickstart..


Click on Configure > WAN > ATM

Configure the following items:
VPI- 8
VCI- 35
Encapsulation- PPP over Ethernet (PPPoE) or PPP over ATM (PPPoA) (either will work with BellSouth)
MultiplexingLLC/SNAP or VC muxed (either will work with BellSouth)

*Note: The only combination that will not work is PPP over Ethernet (PPPoE) with VC muxed.

If you had to make any changes, click the Submit Button.
If the Yellow Icon pops up in the top right hand corner, Ignore it for now.

Click on WAN

In the Wan IP Interfaces Box, click on your Encapsulation.

The default settings in this window will work fine with the exception of Restrictions.

Restrictions should be set to Admin-Disabled

Click on the Submit Button if you had to make any changes.

Now, Click on Yellow Icon in the Top Right Hand corner of the screen.

Click on Save and Restart

You're Done!

Happy Surfing!!!


[BellSouth] How do I setup my Static IP address?

The instructions for setting up your Cayman Router with Static IP Addresses for BSFA can be found here.

BSFA Support for Static IP and Cayman Router

[BellSouth] How do I configure my Cayman for 5 Static IPs?

You will get an email from Bellsouth upon completion of the Multiple Static IP setup on their end. It will look similar to the following:

    DSL Phone Number: 1234567890
    Order Number: 123456

    Welcome to BellSouth (Reg. U.S. Pat. & Tm. Off.) FastAccess (Reg. U.S. Pat. & Tm. Off.) Static IP Service! Your order has been completed. Please note your new Static IP address(s) listed below: - Subnet Address - Used for routing tables ONLY. NOT ASSIGNABLE to a device on the network. - Must be assigned to Router Interface (see router programming instructions at »help.bellsouth.net/bellsouth/asp ··· 8319f358 - First user-assignable address in subnet. Can be used for a PC on the network. - Second user-assignable address in subnet. Can be used for a PC on the network. - Third user-assignable address in subnet. Can be used for a PC on the network. - Fourth user-assignable address in subnet. Can be used for a PC on the network. - Fifth user-assignable address in subnet. Can be used for a PC on the network. - Broadcast Address for subnet. NOT ASSIGNABLE to a device on the network.

    The instructions at »help.bellsouth.net/bellsouth/asp ··· 8319f358 will guide you through the process of configuring your system for Static IP addressing. Note that your PPP login must be changed to reflect a username@bellsouth.net format. If you have a router, it must be programmed for your new static IP address(es). Please configure your system for Static IP right away to take advantage of your new service.
    We have made every effort to ensure continuous service during the transition process, but should your BellSouth FastAccess DSL service become temporarily unavailable, please use your back-up dial account. If you need assistance configuring your system, please contact BellSouth's technical support team for static IP at 1-866-250-5431.

    For more information about your Static IP service, including Terms and Conditions, Acceptable Use Practices, configuration information, and support information, go to »help.bellsouth.net/bellsouth/asp ··· f02d08a1

    Thank you for choosing BellSouth, and enjoy your new service!

    BellSouth Internet Services

*The above setup is only if you wish to have 5 or less computers with internet access.
The following explains how to setup your 5 public IPs while still utilizing NAT to have more machines
behind the router.

Step 1.
You must change your username to username@bellsouth.net, if it is not already set that way.

To do this, go to Configure > WAN and click on PPP over Ethernet vcc1.

Add the @bellsouth.net to the end of your username.

Be sure to Click Submit.

Step 2.
You have now configured your Cayman Router for use with a single BellSouth FastAccess Static IP.
If you have the multiple Static IP option, continue on with Step 3. to use the rest of your Static IP's.
Otherwise, click the Yellow triangle in the upper right corner.
Choose Save and Restart. Once your Cayman has rebooted, you are ready to surf.

Step 3.
To use your five assigned public Static IPs, you must setup an IPMap for each one
pointing to the desired internal machine. To do so, click Advanced on the left side of the screen.
Then click on IPMaps.

Click Add IPMap.

The map entry name can be anything you choose.
The internal IP should be the IP of the internal machine to have
this public IP.
The external IP is
Click Submit.

For each additional Static IP you wish to setup, click Add more IP Maps.
Each IPMap MUST have a different name, internal and
external IP Address. You must click Submit after each IPMap.
When you have entered all IPMaps, click the Yellow Triangle in the
upper right corner.

You may get a warning about the IPMap may not be on your external network,
do not worry about this, as it is just an information statement to
make sure you have the correct IP. If you see validation passed, click
Save and Restart.


[SBC] I'm a 'legacy' customer. What settings do I need to fill in?

If you're on PPPoE, do you not need to enter any @domain.tld (e.x. @swbell.net) string on the end. Just fill in your username and you're ready to go.

Wrong: username@pacbell.net
Right: username

[SBC] How do I configure a Cayman to work with Static IPs? (Bridged)

The instructions for setting up your Cayman with Static IP Addresses are available for download in the ConfigInstructions_SWBPAC.zip found Here
These documents include instructions for multiple installation scenarios that you may run into. Just pick the one applicable to you and follow the steps.

Thanks to Gandalf99 and ucc for the help!

[SBC] How do you Configure a Cayman with Static IP's? (PPPoE)

The instructions for setting up your Cayman with Static IP Addresses are available for download in the ConfigInstructions_AITSNET.zip found Here

These documents include instructions for multiple installation scenarios that you may run into. Just pick the one applicable to you and follow the steps.

5.0 Troubleshooting

My Cayman doesn't work, what could be wrong?

Observing the visual indications as your Cayman attempts to perform a power-up and connect sequence, can be useful in troubleshooting and when posting a problem in this forum, letting others know where your indications differ from the norm will assist in helping resolve your problem.

Here's what to expect:

Start with your DSL phone cord and LAN cable(s) CONNECTED but Caymans' power supply UNPLUGGED.

Now watching the lights on the Cayman, plug in the power supply......

Here's what to expect:

1) Power, LAN port(s), DSL and Status lights come on together.
2) DSL and Status lights off briefly while the Power and LAN port(s) remain on.
3) DSL and Status lights flash alternatively twice.
4) DSL and Status lights off briefly.
5) After a pause of a few seconds the Status light flashes a few times, then
remains on.
6) DSL light flashes a few times then turns off until further internet activity.

This is normal operation. If a step fails, here are some probable causes:

Fails on Step 1:
a)No lights at all?
a1)Bad power supply
a2)Defective Cayman
b)No LAN port light?
b1)Bad (or incorrect type) patch cable
b2)Bad NIC
b3)Cayman port defective, try others
c)Bad power supply
d)Defective Cayman

Fails on Step 2:
a)Bad power supply
b)Defective Cayman

Fails on Step 3:
a)Try reloading flash
b)Defective Cayman

Fails on Step 5:
a) Status light does not flash.
a1)Bad/incorrect internal wiring.
a2)ISP problem
a3)Defective Cayman
b) Status light flashes a few times and then goes out, then periodically flashes/goes out.
b1)Cayman configuration
b2)ISP problem

Fails on Step 6)
a)Cayman configuration
b)ISP problem

How do I troubleshoot my ADSL line using the Cayman 3546?

Use the Netopia TechNote Located Here.

It includes step by step instructions for troubleshooting if you have lost internet access, including how to use the Cayman built-in Diagnostics to run line tests checking your ADSL connection. Also includes links to other common issues such as Password Reset and more...

I'm having problems with my Cayman Password, what could be wrong?

Encountering Password problems are common with the Cayman and even more so if you have recently upgraded the firmware. Most users are led to believe that there is a problem with the Password when in reality it a problem with the Username. Here are some suggestions to try before Resetting the Password.

Always start out with

1. Serial Number of your Cayman
2. leave it blank
3. one you previously used

Odds are one of these suggestions will get you in.

My Cayman keeps reporting Bad UserName/Password

This is usually caused by the Cayman believing that the DSL connection has dropped and it then tries to reestablish the connection. When it tries to login to your provider again, their server has never realised that your connection was dropped. It then denies the login thinking that you are attempting to login twice. As a work around, do the following:

1. Browse into your Cayman.
2. Goto Configure
3. GotoWAN
4. Goto WAN IP Interface
5. Click Advanced
6. Change the Max Terminates and Restart Timer to higher numbers.
7. Click submit
8. click the Yellow Triangle and choose save and restart.

This changes forces to Cayman to hold a "dropped" connection a little longer before trying to login again. The problem can be due to a poor DSL signal, lost packets, or just from your provider taking too long to acknowledge a packet. Raising these settings will not cure a line problem, but they will stop the Cayman from dropping the connection so quickly. If you do have a line problem, please contact your provider to have the line checked.

My Cayman Will Only Allow 1 Machine To Surf the Net at a Time (WAN user limit)

When this happens, browse into the Cayman router and check the home page. If it shows WAN Users: 1, this means your Cayman has dropped it's feature keys.

To correct this, follow these steps:

1. goto »www.netopia.com/equipment/purcha ··· der.html
2. enter your serial number
3. Do Not Check any Boxes
4. click continue.
5. Fill out the form and download your file.
6. Next, browse back into your Cayman and go to Install.
7. Choose Install Keys.
8. After you have uploaded your keys to your router, choose save and restart.

Be sure to check your other features, as this only restores your WAN Users and Security Monitoring. Feature keys such as VPN and Wireless, if you had them, must supplied from Netopia tech support in a seperate file.

How do I collect statistics from my Cayman for further analysis?

You can use an free application called ADSL Monitor to collect statistics. The download page is located at: »home.swbell.net/trifidrd/index.h ··· dex.html

The windows based application produce output files that can be used in Excel, Lotus 123 or Star Office to help understand the problems in ADSL lines.

6.0 Upgrading Firmware

How do I Upgrade the Cayman Internet Router Firmware?

You can follow these instructions outlined by the Netopia website.

How to Upgrade the Cayman Internet Router firmware

Where would I find the Firmware Upgrades for Cayman Routers

Firmware Downloads for Cayman Routers

6.3 Upgrades for Cayman 3220-H

6.4 Upgrades for Cayman 3546 and 3547W


7.0 Setting up a server

How do I configure a Pinhole in my Cayman Router?

You can follow these instructions outlined by the Netopia website.

Configuring a Pinhole in the Cayman Router

How do I host Roger Wilco?

The following ports will need to be forwarded:
3782, 3783, 18009, 27900, and 28900

Create the pinholes as follows. You may change the name to anything you like, as long as each name is different. In each instance, replace the internal ip with that of your computer running either Roger Wilco or Roger Wilco Base Station:

1. name = roger wilco 1
protocol = TCP
Ext port start = 3782
ext port end = 3783
internal ip = 192.168.1.x
internal port = 3782
add more pinholes

2. name = roger wilco 2
protocol = UDP
Ext port start = 3782
ext port end = 3783
internal ip = 192.168.1.x
internal port = 3782
add more pinholes

*Steps 1 and 2 are the same except for the protocol. Both must be used.

3. name = roger wilco 3
protocol = TCP
Ext port start = 18009
ext port end = 18009
internal ip = 192.168.1.x
internal port = 18009
add more pinholes

4. name = roger wilco 4
protocol = UDP
Ext port start = 27900
ext port end = 27900
internal ip = 192.168.1.x
internal port = 27900
add more pinholes

5. name = roger wilco 5
protocol = UPD
Ext port start = 28900
ext port end = 28900
internal ip = 192.168.1.x
internal port = 28900

6. Click yellow triangle in upper right corner. If validation passes, click save and restart.

When someone wants to connect, they will use your public ip of name. The is the wan ip showing on the cayman homepage. The :3783 is the port for Roger Wilco Base Station. If you wish to host a channel using Roger Wilco, the port is 3782.

Which ports need pinholes to function?

Ports to Configure for Pinholes:
With Network Address Translation, servers on your network can be accessed via pinholes.

Netopia and Microsoft keeps a list of common ports found HERE and HERE for easy reference. Most common applications are listed.

How do I host Microsoft NetMeeting?

You can follow these instructions outlined by the Netopia website.

How do I configure an IP Map in the Cayman Router?

The instructions for Configuring an IP Map is outlined here at the Netopia Website.

Configuring an IP Map in the Cayman Router

How do I turn off the DHCP Server on the Cayman Series gateway?

To turn the DHCP server off on the Cayman Series gateway, follow the instructions below:

1. Browse into the Cayman Series gateway.
2. Click on Configure
3. Click on LAN
4. Click DHCP Server
5. Choose OFF from the Server Mode drop down box
6. Click the Yellow Triangle in the upper right-hand corner. Choose Save and Restart.

How can I monitor network traffic?

You can set up MRTG on your Cayman using SNMP. For more information, please see the MRTG section here - »Bandwidth