VMG1312-B10A: Bugs: Difference between revisions

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AA-Andrew

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{{TOC limit\|4}} This page lists the problems we have found and raised regarding the ZyXEL VMG1312-B10A. The main problems are: MTU 1500 is not supported on some setups (Internet access will still work fine, but we'd like 1500) - (ZyXEL ~~say~~will ~~they~~not ~~should~~provide ~~be able~~firmware to ~~support~~resolve this ~~soon~~) VPNs may not reconnect if PPP drops - until you unplug and replug the LAN-side ethernet cable! We saw this same thing last year with Huawei HG612, which use the same chipset. (ZyXEL HQ are investigating having seen this demonstrated in our offices) Many of these issues are being held up as ZyXEL's developers are working on getting the router through BT's 'conformance testing' (SIN 498). Some of the bugs below are actually requirements in BT's testing, so we expect them to be fixed as part of this. ====Resolution==== Not going to be supported. (sorry) There is a [http://forums.thinkbroadband.com/aaisp/4591711-zyxel-vmg-1312-b10a-mtu-1508-fix-now-available.html 3rdparty build of firmware which adds support for 1508 byte MTU] although AAISP are unlikely to support it. ==IPv6 RA on LAN== == DNS Spoofing when PPP is Down == ====Issue Description==== When PPP is down (iei.e. no internet connection) the router will answer DNS queries and answer with ~~it's~~its own IP. This means that the user will be taken to the ZyXELs own web interface when trying to access a website when the internet connection is down, this applies for http and https traffic. This is not a configurable option. ====Updates==== == PPPoE Session-ID caching bug (In Bridge mode) == ====Issue Description==== Last year we had an problem with Huawei FTTC modems, the standard ones that Openreach supply The bug appears to be that the modem manages to "~~blacklist~~block" some UDP packets after a PPP restart. Typically this affects VPN tunnels. The short term fix is to ~~unplugged~~unplug and ~~plugged~~plug back in! We now have what looks to be the same fault on the ZyXELs - both on ADSL and VDSL. ==HTTP & HTTPS Interception/spoofing (when router offline)== ====Issue Description==== If the router ~~looses~~loses its internet connection (ege.g. drops sync, drops ppp) then it will intercept web page requests and will forward them to itself. This is meant to be 'helpful' in that the router will then have a page telling the user that internet is down etc. However, as it also intercepts https traffic this will cause certificate warnings in the browser which will alarm and the user and is much less useful. Also discussed here: http://askubuntu.com/questions/577633/suspicious-ssl-certificate None yet. ==~~Low~~Long PADI retry time== ====Issue Description==== When PPP or sync drops, the router will need to reconnect. Once in sync, the router will send a PADI packet to start the process of logging back in. It seems the router sends a PADI every 100 seconds or so. This causes unnecessary delay in reconnecting. ~~-our~~Our FireBrick product, for example, will start ofoff trying every 100 ~~miliseconds~~milliseconds before it starts backing off to every 2 seconds and then a maximum of every 10 seconds. We've asked ZyXEL for more information on the PADI retry and if it can be made to try more often than every 100 ~~secnds~~seconds. ====Date Reported==== 2015-06-24 ====Resolution==== Static routes can be added via the [[VMG1312:~~_Static_Routes~~ Static Routes\|CLI]]. Alternatively you can use the ZyXEL as a bridge and perform PPPoE on your internal router/firewall device. ==Intermittent loss of IPv6== #Setting IPv6 addressing to be statically configured helps work around this problem: ##Router admin > Broadband > AAISP-VDSL (or AAISP-ADSL if you are on ADSL) ##change the IPv6 Address from Automatic to Static, paste in the router's WAN IPv6 address (2001:8b0:1111:1111:0:ffff:[your IPv4 WAN in HEX]) and 64 in "prefix length"). ##IPv6 will still be lost if PPP reconnects, it should be ok after a reboot of the router though. This is related to the 'IPv6 RA on LAN' issue described above on this page. #Instead of the above, try disabling QoS ==Dropping PPP for 15-20 mins RESOLVED== ====Issue Description==== We are seeing some lines, when in router mode (iei.e. plugged in to the phone line and used as the router) drop PPP and do not re-establish PPP for ~~15-20~~15–20 minutes. This is very odd. AAISP are investigating this as a priority. A work around is to use a separate DSL modem and configure the ZyXEL as a PPPoE router. This is not ideal, do talk to staff about this. Setting the VMG to bridge mode and using a separate PPPoE router works fine. *Setting the VMG to PPPoE mode and using a separate VDSL modem works fine. Also see 'Web UI Hangs (Broken HTTP/1.1)' on this page. When using the router's own wifi, viewing the web pages (http) is very slow. ege.g., 20 seconds to load the Wireless settings page. Switching to Wired the pages load as expected. Whilst the web UI is slow, telnet CLI and normal internet access is fine. ====Date Reported==== 2015-06-16 ====Issue Description==== The QoS and traffic limiting features have the potential to be quite useful. However, the default QoS settings have problems if there is a large rsync (over ssh) upload in progress in that DNS queries time out. We have some QoS notes on [[~~ZyXEL_VMG1312~~VMG1312-B10A: QoS]]. ====Date Reported==== ====Resolution==== Disabling default classes, and enabling QoS on packet length seems an all-round good solution See: [[~~ZyXEL~~ VMG1312-B10A: QoS]] [[Category:~~ZyXEL_VMG1312~~ZyXEL VMG1312-B10A\|Bugs]]