Accessing DOCSIS diagnostics from within/behind FreeBSD router

2003-12-08 Thread J. Seth Henry
Guys,
I'm not sure if this is even a FreeBSD question, but googling hasn't turned up 
much on it, so I thought I'd toss this one out there.

I have a Motorola SB5100 cable modem directly attached to a FreeBSD router 
(running ipfilters/ipnat). The external network is a comcast segment, and is 
assigned a dynamic IP. The internal network is routed on 192.168.1.x, where 
the router is 192.168.1.254.

The trick is, the cable modem is on the external side, but apparently 
listening on 192.168.1.100 for HTTP requests (for its diagnostics report).

Is there anyway to access this diagnostic page without temporarily plugging 
the CM into a Windows box?

Thanks,
Seth Henry

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Re: Accessing DOCSIS diagnostics from within/behind FreeBSD router

2003-12-08 Thread Steve Bertrand
 I have a Motorola SB5100 cable modem directly attached to a FreeBSD router 
 (running ipfilters/ipnat). The external network is a comcast segment, and is 
 assigned a dynamic IP. The internal network is routed on 192.168.1.x, where 
 the router is 192.168.1.254.
 
 The trick is, the cable modem is on the external side, but apparently 
 listening on 192.168.1.100 for HTTP requests (for its diagnostics report).
 
 Is there anyway to access this diagnostic page without temporarily plugging 
 the CM into a Windows box?
 

Since 192.168.1.x subnet is on the inside of the network, your FBSD box
will never route a request for an IP on that network outbound by
default.

I may be shown up here, but you will probably be best changing your
internal network to another subnet 192.168.0.x perhaps, and then your
FBSD router should pass toward the Internet a request for 192.168.1.100,
and hopefully the comcast modem will catch it.

Steve


 Thanks,
 Seth Henry
 
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-- 

Steve Bertrand
President/CTO,
Northumberland Network Services

t: 905.352.2688
w: www.northnetworks.ca

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Re: Accessing DOCSIS diagnostics from within/behind FreeBSD router

2003-12-08 Thread Lowell Gilbert
J. Seth Henry [EMAIL PROTECTED] writes:

 I'm not sure if this is even a FreeBSD question, but googling hasn't turned up 
 much on it, so I thought I'd toss this one out there.
 
 I have a Motorola SB5100 cable modem directly attached to a FreeBSD router 
 (running ipfilters/ipnat). The external network is a comcast segment, and is 
 assigned a dynamic IP. The internal network is routed on 192.168.1.x, where 
 the router is 192.168.1.254.
 
 The trick is, the cable modem is on the external side, but apparently 
 listening on 192.168.1.100 for HTTP requests (for its diagnostics report).
 
 Is there anyway to access this diagnostic page without temporarily plugging 
 the CM into a Windows box?

The most obvious answer would be to change the internal network to not
conflict with the external network.  With a little more effort, you
could set up the FreeBSD box to bridge instead of routing, and just
make sure you don't assign the .100 address to anything other than the
cable modem.

-- 
Lowell Gilbert, embedded/networking software engineer, Boston area: 
resume/CV at http://be-well.ilk.org:8088/~lowell/resume/
username/password public
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