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Router - DLINK 320B: Difference between revisions

Router - DLINK 320B (view source)

Revision as of 16:44, 6 December 2017

786 bytes added ,  6 December 2017
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<indicator name="Front">[[File:Menu-B10D.svg|link=:Category:AA_Routers|30px|Back up to the A&A Routers Page]]</indicator>
<h2 style="margin:0 1em 0.5em 0">Currently shipping hardware version</h2>
[[Image:DLink-DSL-320B-Z1-front-view-v2.jpg | frameless | right | 200px | alt Dlink DSL-320B-Z1 modem, front view]]
At the time of writing, December 2017, the currently shipping hardware version of the DLink DSL-320B modem is the DSL-320B-<b>Z1</b>. Confusingly, in the past DLink has described several completely different modems as “DSL‑320B”. The following sections describe the DSL‑320B‑Z1 hardware.
 
==Factory default IP, admin password==
==Default settings==
{|class="wikitable"
!colspan="2"|Default/Factory Settingsdefault web admin interface
|-
!Username:
|<code>admin</code>
|-
!Password:
|<code>admin</code>
|-
!IP:
|<code>192.168.1.1/24</code>
|}
==Notes==
*AAISP ships these devices for use as straight ethernet modems. Although they are capable of working as (buggy) routers, AA pre-configures them to work in bridge mode only, that is, in simple PPPoE modem-only mode, not operating as routers.
*TheirThe modem’s admin web interface is quite insecure and in ‘router’ mode they have various critical security bugs, which is why we strongly suggest that customers never use them configured in 'router' mode. They are sold by AAISP as bridge-only. Older modems, the now obsolete pre-Z (-D1) model, were shipped with their reset button covered to protect it and prevent them from being reset!▼
*If you reset them to factory settings using the pin-in-hole technique, then with their factory defaults they <b>will not work at all</b> as straight PPPoE ethernet modems. Their configuration <b>must</b> be altered before use. Ask [https://www.aaisp.net.uk/support.html AA support] for help with this or see [[#post-factory-reset|post-factory reset configuration]] instructions below.
*No per-user or per-line login info or password configuration is required. ISP account or line-specific login and password info is configured in your <i>router</i>, the DLink modem doesn’t need these values.
*They do support 1500 byte IP MTU/MRU (unlike the [[Router - ZyXEL_P660R-D1]]) using ethernet frames with a 1500+8=1508 byte payload. (Your router will also have to support RFC 4638 and 1500+8=1508 byte MTU/MRU too though for this to be effective.) Not supported by BT on 20CN lines.
*Important - <b>BT 20CN</b> lines: MTU 1500+8=1508 will not work on old BT 20CN lines because of BT’s limitations, nothing related to this modem.
▲*Their web interface is quite insecure and in ‘router’ mode they have various critical security bugs, which is why we strongly suggest that customers never use them configured in 'router' mode. They are sold by AAISP as bridge-only. Older modems, the now obsolete pre-Z (-D1) model, were shipped with their reset button covered to protect it and prevent them from being reset!
*The modems support the ADSL standards G.992.1/G.DMT (‘ADSL1’), G.992.3 (ADSL2) and G.992.5 (ADSL2+) and can either auto-detect the best mode or lock it to just one option. Annex M is supported. SRA is also supported.
*VDSL2 is not supported, so these devices cannot be used with FTTC.
*TR-069 is not supported, so the devices cannot automatically be remotely configured, monitored or upgraded by AA.
*It is vital that you <b>not expose the LAN-side ethernet interface to users on the LAN</b> unless all possible users and devices on the LAN are trusted because of various critical security bugs in this respect. Because of such bugs, setting passwords on the modem’s admin web UI etc is not enough. If your router happens to prevent LAN-internal users from accessing the modem then so much the better, otherwise your main router’s facilities / internal firewalling and access controls should be explored.
*Chipset: The currently shipping DSL-320B-Z1 units (at the time of writing, December 2017), and those shipped from approx 2015 onwards, use an old but capable MediaTek/TrendChip chipset. The older -D1 routers were Broadcom-based.
*Incorrect manufacturer’s defaults: The default settings shown in the router’s web admin user interface show <b>defaults that are questionable</b>. Bizarrely, DSL bitswap is set to off by default according to the web admin ui. These settings should be fixed - see following section.
 
== Initial setup using the web admin interface ==
<li>SRA - <b>enable</b> (for future-proofing, but currently has no effect as SRA is not supported by eg BT currently)</li></ul>
 
''Performance tip for long lines:'' If you have an extremely long phone line (>60 dB downstream attenuation) and you canhave usean ADSL2+ service, it is maybe worthwhile experimenting with setting the DSL mode/standard option to ‘ADSL 2’ (only) in the above list of options, that is, taking ADSL2+ out of the list of allowed standards, as opposed to allowing the modem to use ADSL2+, to see if this restriction gives a performance improvement. It will be a long process to get a meaningful comparison with take many restarts and many tests needed to confirm any possible performance difference between allowing and disallowing ADSL2+. If in any doubt always enable ADSL2+ or ‘auto' mode ie ADSL1/ADSL2/ADSL2+ ‘auto’ mode, where the modem will use ADSL2+ (which can support much higher best-case speeds than ADSL2) if the exchangeexchange’s DSLAM or MSAN supports ADSL2+ too.
 
== After each reset to factory settings ==
CecilWard
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