Netgear DG834 (series)

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Netgear DG834G v3 Netgear DG834Gv3.JPG
Netgear DG834G v3

The DG834 series are popular ADSL modem router products from Netgear. The devices can be directly connected to the phone line and establish an ADSL broadband Internet connection to the ISP and share it among several computers via 802.3 Ethernet and (on many models) 802.11b/g wireless data links.

Contents

These devices are popular among ISPs as they provide an all in one solution (ADSL modem/router/firewall/switch), which is ideal for home broadband users. [1] The Netgear UK website claims the DG834G is the most popular wireless router in the UK and lists five awards that it has received. [2]

The DG834G is perhaps the most popular product of the series, and has been produced in five versions. All versions have Wi-Fi.

The DG834 (without the G suffix) is the same product but without Wi-Fi. Wi-Fi can be added later by plugging in a wireless access point although this then occupies one of the RJ45 ports.

The DG834GT is a similar product - it looks like a DG834G v2 or v3, but has a Broadcom chipset like a DG834G v4 and supports Atheros Super G which can achieve a 108 Mbit/s signaling rate (double that of standard 802.11g). In the United Kingdom, many DG834GT routers were supplied by Sky Broadband and are branded with a Sky logo. Sky later supplied a DG934G router, which is a DG834G v3 router in a black case.

The DG834 GB is similar to DG834GT, have Broadcom chipset, but support only 54 Mbit/s wifi. It has modifications to support Annex-B ADSL.

The DG834PN model has Wi-Fi but no external antenna. It has six internal antennas, and is easily recognised by the blue dome on the top of its case.

The DG834GSP model is locked to a particular ISP.

Firmware

Netgear DG834G v4 rear plugs, in order: the RJ-11, the Ethernet switch (4 ports, from v3 is yellow coloured), the reset, the DC power plug, the 2.4GHz antenna. Netgear dg834gv4 rear.jpg
Netgear DG834G v4 rear plugs, in order: the RJ-11, the Ethernet switch (4 ports, from v3 is yellow coloured), the reset, the DC power plug, the 2.4GHz antenna.

Netgear's stock firmware on all products in the series runs Linux. This has led to popularity among computer enthusiasts as it provides a cheaper alternative to a Linux router. Much of the Netgear firmware is built from open-source software, and Netgear provide this source code [3] and the build system to enable users to reassemble a new firmware image. As a result, various individuals and projects have produced modified firmware which extend the capabilities of the built-in firmware. It is also possible to completely replace the built-in firmware for TI-AR7 and Broadcom chipsets with firmware from other projects, such as OpenWRT. [4] All products except the DG834(G) v5 run on a MIPS architecture CPU, the DG834(G) v5 runs on an ARM architecture CPU.

Security issue

Any person who can access the router using a web browser, can enable "debug" mode using [IP_ADDR]/setup.cgi?todo=debug and then connect via Telnet directly to the router's embedded Linux system as 'root', which gives unfettered access to the router's operating system via its Busybox functionality. [5] [6] Additionally, a 'hidden' URL [IP_ADDR]/setup.cgi?todo=ping_test also allows unfettered access (On a v5 model a username and password are requested). There is no user option provided to disable this. On default Netgear firmware Telnet access lacks password or other control; on ISP modified versions (such as Sky) a Telnet password exists based on the MAC address which can be found via online websites.

Default settings

Specifications

Netgear DG834G v1. Dg834g v1.jpg
Netgear DG834G v1.

Differences between revisions/versions

DG834(G)

Netgear DG834G v4, in order: the power LED, the 4 Ethernet cable detection LEDs, the wireless power state and activity, the carrier wave LED (off/on) and the PPP LED (off, on, blinking when there's activity). Netgear dg834gv4 front.jpg
Netgear DG834G v4, in order: the power LED, the 4 Ethernet cable detection LEDs, the wireless power state and activity, the carrier wave LED (off/on) and the PPP LED (off, on, blinking when there's activity).

DG834GT

Only one version produced. White case with a white removable antenna to the rear left of the unit which utilises an RP-SMA connector. Inclusion of a Broadcom BCM6348 chipset make this model notable, particularly as the Broadcom chipset offers superior compatibility over the Texas Instruments AR7 chipset (used in the DG834G v1-3) with ADSL2+ / LLU lines in the UK, partly due to power spectrum density (PSD) masks applied at the DSLAM.

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References

  1. "Top 10 Network Switch Manufacturers". 2023-05-18. Retrieved 2023-07-09.
  2. "Wireless Broadband Routers: DG834G". Netgear. Archived from the original on 2010-11-27.
  3. Netgear's source code repository
  4. Netgear DG834GT
  5. Netgear DG834G telnet
  6. DG834G Embedded Linux
  7. daniel (2013-05-16). "NETGEAR DG834G". OpenWrt Wiki. Retrieved 2023-07-09.