Comtrend Technical Info: Difference between revisions
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It is unusual (unique possibly) in that the broadcom kernel/drivers can be compiled with ipv6 enabled. This means that a 3rd party firmware with ipv6 DSL support and |
It is unusual (unique possibly) in that the broadcom kernel/drivers can be compiled with ipv6 enabled. This means that a 3rd party firmware with ipv6 DSL support and |
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a linux userspace is entirely |
a linux userspace is entirely feasible (indeed, at least one is in development). |
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It has 64MB of RAM, and runs Linux 2.6.30, and busybox 1.00. |
It has 64MB of RAM, and runs Linux 2.6.30, and busybox 1.00. |
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Comtrend GPL Source code is downloadable from [http://www.comtrend.com/gplcddl.htm http://www.comtrend.com/gplcddl.htm] |
Comtrend GPL Source code is downloadable from [http://www.comtrend.com/gplcddl.htm http://www.comtrend.com/gplcddl.htm] |
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[[Category:IPv6]] [[Category:Router]] |
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Latest revision as of 21:16, 6 Ocak 2015
Comtrend technical details
The comtrend 'ipv6 capable' router that AAISP are trialling is a fairly standard broadcom chipset. It has 1 DSL port, 4 ethernet ports and a wireless LAN. There is also a USB port which acts as an external storage device.
It is unusual (unique possibly) in that the broadcom kernel/drivers can be compiled with ipv6 enabled. This means that a 3rd party firmware with ipv6 DSL support and a linux userspace is entirely feasible (indeed, at least one is in development).
It has 64MB of RAM, and runs Linux 2.6.30, and busybox 1.00.
Passwords
In addition to the documented default password of root/12345 there are 3 others:
nobody/12345 support/support user/user
All users have a UID/GID of 0.
Userspace
Out of the box the router is unfirewalled and doesn't start configuring iptables until you enable it on the WAN and reboot. It appears to not use ip6tables, but as we don't have access to the source for the ipv6 version of the router this may have been fixed.
It has the following ports open:
Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 0.0.0.0:44401 0.0.0.0:* LISTEN tcp 0 0 192.168.1.1:1780 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:30005 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:49431 0.0.0.0:* LISTEN tcp 0 0 :::80 :::* LISTEN tcp 0 0 :::21 :::* LISTEN tcp 0 0 :::22 :::* LISTEN tcp 0 0 :::23 :::* LISTEN
The entire 'normal' operation is controlled by a comtrend proprietary application called SMD. In the default firmware this is started by /etc/profile!
Busybox is linked with several proprietary libraries. These appear to replace the standard tftpd and ftpd functionality.
CFE
In common with other routers of its type it uses CFE. if you hold down reset for 10 seconds whilst powering up eventually it will drop into a CFE recovery mode where you can flash a new firmware using a browser. This means it's somewhat harder to break (unless you corrupt CFE itself).
Tech stuff
# cat /proc/cpuinfo system type : 96328A-1341N1 processor : 0 cpu model : Broadcom4350 V7.5 BogoMIPS : 319.48 wait instruction : yes microsecond timers : yes tlb_entries : 32 extra interrupt vector : no hardware watchpoint : no ASEs implemented : shadow register sets : 1 core : 0 VCED exceptions : not available VCEI exceptions : not available
Onboard hardware
Visible chips are
Broadcom BCM63281 ADSL2+ controller Broadcom BCM43225 Wifi/Bluetooth Samsung K4T511630 RAM Macronix MX25L6445E 8Mb Flash
Source code
Comtrend GPL Source code is downloadable from http://www.comtrend.com/gplcddl.htm