3R Max DVR Info and Ethernet FTP Telnet login

The 3R MAXDVR4000 is a 1U rackmount DVR with four composite inputs.

There is not much info out there about them, there are two IDE hard drives inside formatted with resizerfs, a Axis Video Controller serial and Ethernet port.

If there hard drives are no longer working, they can be removed and replaced with another pair of working drives.  The sizes do not have to match either.  The drives are formatted and file and folder structures are copied on to the new hard drives upon power up.  You may notice a file called 'Hdd_Image.tgz' copied on one or both drives, containing the default info.

Conducting a Wireshark trace on the Ethernet port, yielded a default static IP of 192.168.0.60, with a Telnet and FTP server.

Default login credentials are:
root
pass

Default front panel password is 0000
 

Files can be easily pulled from the unit using FTP and the unit work in a circular buffer mode.


Some console dumps:

Axis Developer Board LX release 2.0.0
Linux 2.4.5 on a cris (ttyp0)

[root@3R-miniMax /]112# mount
/dev/root on / type cramfs (ro)
proc on /proc type proc (rw)
/dev/flash2 on /mnt/flash type jffs (rw)
tmpfs on /var type tmpfs (rw)
/dev/hda1 on /mnt/hda1 type reiserfs (rw)

[root@3R-miniMax /]643# cat /proc/cpuinfo
cpu        : CRIS
cpu revision    : 11
cpu model    : ETRAX 100LX v2
cache size    : 8 kB
fpu        : no
mmu        : yes
mmu DMA bug    : no
ethernet    : 10/100 Mbps
token ring    : no
scsi        : yes
ata        : yes
usb        : yes
bogomips    : 166.40

[root@3R-miniMax /]643# df
Filesystem           1k-blocks      Used Available Use% Mounted on
/dev/flash2               1920      1344       576  70% /mnt/flash
tmpfs                     8432        48      8384   1% /var
/dev/hda1......

Some more info can be found from: http://www.chinasaixin.com/3R/3R/body02b-02_01.htm

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How to stop avahi-daemon from advertising on a network

The problem exists when a box decides to tell everyone on the network "hey, I have a VNC / SSH / Remote Disk connection, come and try me out!"  This can be evidenced by running the command 'avahi-browse -a' on the host pc with the services being advertised.

Some people go to lengths to kill of the daemon all-together, but there are some things avahi-daemon does with can be beneficial, other than advertising services.  Also killing off the avahi-daemon during runtime is difficult as alot of other things like talk to it.

All you need to do is modify the /etc/avahi/avahi-daemon.conf file.

uncomment and edit the line to read:
disable-publishing=yes

And then restart the service to make the changes stick
sudo service avahi-daemon restart

from the man page avahi-daemon.conf
disable-publishing= Takes a boolean value ("yes" or "no"). If set to "yes", no record will be  published  by Avahi, not even address records for the local host. Avahi will be started in a querying- only mode. Use this is a security measure. This option defaults to "no"

It's not all beer and skittles, clients looking for services on the host may throw up errors sometimes.

references:
man avahi-daemon
mon avahi-daemon.conf

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Ethernet Throwing Star Tap using Krone Punch Down Connectors Cat 5

This passive Ethernet tap featured at greatscottgadgets is great.
Get a couple of USB Ethernet adapters for your laptop, set up a tun interface and you can see everything on both sides without any arp cache poisoning.

It is possible to make the device using some Krone punch down blocks and some cat5 cable.

Here is some pictures, I have not added the 220pf caps yet, they are to derate 1 Gig networks to 100 Meg.

The schematic below, shows what is going on.

Link to Ethernet wiring diagram from Pinoutsguide Here
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