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The Netgear DGND4000 (WiFi DSL Modem Router - Premium) is an excellent router as such. Unfortunately it has a few issues that Netgear has no intention of fixing:
=Netgear DGND4000 (N750 WiFi DSL Modem Router - Premium Edition)=
DGND4000 is an excellent router as such. Unfortunately it has a few issues that Netgear has no intention of fixing:
*It forces all DNS requests to go through the routers own forwarding service. Caching of requests is disabled ($$ business feature $$), so only effect is that every DNS request takes longer to complete.
*It forces all DNS requests to go through the routers own forwarding service. Caching of requests is disabled ($$ business feature $$), so only effect is that every DNS request takes longer to complete.
*Number of concurrent connections (nf_conntrack_max) is set relatively low (compared to the routers hardware capacity)
*Number of concurrent connections (nf_conntrack_max) is set relatively low (compared to the routers hardware capacity)


This little program will optimize kernel settings, set DNS to google's DNS service, and disable unnecessary services to give more free memory and cpu cycles on router
Hardware specs:
*system type: 96362ADVN2xh
*cpu model: Broadcom4350 V7.0 (dual core)
*MemTotal: 124296 kB
*Kernel: Linux version 2.6.30 (root@BuildServer) (gcc version 4.4.2 (Buildroot 2010.02-git) ) #2 SMP PREEMPT Sat Feb 23 14:08:25 CST 2013
<br/>
This little program will do the following:
*Enable telnet connections on 192.168.0.1
*Optimize kernel settings
*Set DNS to google's DNS service
*Disable unnecessary services to give more free memory and cpu cycles on router


Hardware specs:
=Download=
system type: 96362ADVN2xh
 
cpu model: Broadcom4350 V7.0 (dual core)
{| class="wikitable"
MemTotal: 124296 kB
!Date
!Version
!File
!Description
|-
|26. Januar 2014
|1.00
|http://files.subsecret.dk/RouterSetup100.jar
|Initial release (includes sourcecode)
|}
 
=Usage=
java -jar RouterSetup100.jar ADMIN-PASSWORD
 
=Newest official firmware=
North America: http://www.downloads.netgear.com/files/GDC/DGND4000/DGND4000_V1.1.00.14_1.00.14NA.zip<br/>
Outside North America: http://www.downloads.netgear.com/files/GDC/DGND4000/DGND4000_V1.1.00.14_1.00.14.zip
=Using telnet interface to change dsl settings=
telnet 192.168.0.1
Enter admin password.<br/>
See current speed
# adslctl info --show
adslctl: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason:    8000
Last initialization procedure status:  0
Max:    Upstream rate = 2158 Kbps, Downstream rate = 19232 Kbps
Bearer: 0, Upstream rate = 2044 Kbps, Downstream rate = 17915 Kbps 
Link Power State:      L0
Mode:                  ADSL2+ AnnexM EU-56
TPS-TC:                ATM Mode
Trellis:                U:ON /D:ON
Line Status:            No Defect
Training Status:        Showtime
                Down            Up
SNR (dB):        6.1            7.5
Attn(dB):        22.0            15.9
Pwr(dBm):        18.6            12.9
Retrain connection with focus on maximum download speed (use --mod m for more upload speed)
# adslctl configure --mod a
Wait until connection is reestablished.<br/>
Check speed again
# adslctl info --show
adslctl: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason:    8000
Last initialization procedure status:  0
Max:    Upstream rate = 1202 Kbps, Downstream rate = 20584 Kbps
Bearer: 0, Upstream rate = 1202 Kbps, Downstream rate = 19200 Kbps
Link Power State:      L0
Mode:                  ADSL2+
TPS-TC:                ATM Mode
Trellis:                U:ON /D:ON
Line Status:            No Defect
Training Status:        Showtime
                Down            Up
SNR (dB):        6.1            7.7
Attn(dB):       21.0            13.2
Pwr(dBm):        18.5            12.1
So the speed was changed from 17915/2044 kbps to 19200/1202 kbps

Latest revision as of 13:36, 18 February 2014

Netgear DGND4000 (N750 WiFi DSL Modem Router - Premium Edition)

DGND4000 is an excellent router as such. Unfortunately it has a few issues that Netgear has no intention of fixing:

  • It forces all DNS requests to go through the routers own forwarding service. Caching of requests is disabled ($$ business feature $$), so only effect is that every DNS request takes longer to complete.
  • Number of concurrent connections (nf_conntrack_max) is set relatively low (compared to the routers hardware capacity)

Hardware specs:

  • system type: 96362ADVN2xh
  • cpu model: Broadcom4350 V7.0 (dual core)
  • MemTotal: 124296 kB
  • Kernel: Linux version 2.6.30 (root@BuildServer) (gcc version 4.4.2 (Buildroot 2010.02-git) ) #2 SMP PREEMPT Sat Feb 23 14:08:25 CST 2013


This little program will do the following:

  • Enable telnet connections on 192.168.0.1
  • Optimize kernel settings
  • Set DNS to google's DNS service
  • Disable unnecessary services to give more free memory and cpu cycles on router

Download

Date Version File Description
26. Januar 2014 1.00 http://files.subsecret.dk/RouterSetup100.jar Initial release (includes sourcecode)

Usage

java -jar RouterSetup100.jar ADMIN-PASSWORD

Newest official firmware

North America: http://www.downloads.netgear.com/files/GDC/DGND4000/DGND4000_V1.1.00.14_1.00.14NA.zip
Outside North America: http://www.downloads.netgear.com/files/GDC/DGND4000/DGND4000_V1.1.00.14_1.00.14.zip

Using telnet interface to change dsl settings

telnet 192.168.0.1

Enter admin password.
See current speed 

# adslctl info --show
adslctl: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason:    8000
Last initialization procedure status:   0
Max:    Upstream rate = 2158 Kbps, Downstream rate = 19232 Kbps
Bearer: 0, Upstream rate = 2044 Kbps, Downstream rate = 17915 Kbps   

Link Power State:       L0
Mode:                   ADSL2+ AnnexM EU-56
TPS-TC:                 ATM Mode
Trellis:                U:ON /D:ON
Line Status:            No Defect
Training Status:        Showtime
                Down            Up
SNR (dB):        6.1             7.5
Attn(dB):        22.0            15.9
Pwr(dBm):        18.6            12.9

Retrain connection with focus on maximum download speed (use --mod m for more upload speed) 

# adslctl configure --mod a

Wait until connection is reestablished.
Check speed again 

# adslctl info --show
adslctl: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason:    8000
Last initialization procedure status:   0
Max:    Upstream rate = 1202 Kbps, Downstream rate = 20584 Kbps
Bearer: 0, Upstream rate = 1202 Kbps, Downstream rate = 19200 Kbps

Link Power State:       L0
Mode:                   ADSL2+ 
TPS-TC:                 ATM Mode
Trellis:                U:ON /D:ON
Line Status:            No Defect
Training Status:        Showtime
                Down            Up
SNR (dB):        6.1             7.7
Attn(dB):        21.0            13.2
Pwr(dBm):        18.5            12.1

So the speed was changed from 17915/2044 kbps to 19200/1202 kbps

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