[jetspeed]

UK Sentinel wrote:

So are you looking to route All LAN clients DNS that would normally be forwarded to Main Router /External DNS Service to another DNS service located on your LAN (IP) ?

Yes to my Pi Hole. I don’t want IOT devices using their sneaky hardcoded DNS.

UK Sentinel wrote:

If so, how do you propose handling LAN to LAN Routed DNS and any NAT implication – or is this not an issue for yourself in your set-up with devices such as IP cameras etc. ?

I don’t have any IP cameras, so won’t be an issue?

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[jetspeed]

Anyone know if it’s possible route all DNS requests (port 53) to an IP address (specifically a local Pi Hole)?

Currently, I’m blocking Google DNS (hardcoded Chromecast) using LAN -> Route. Adding other public DNS will seem tedious. Is there any other way with the DSL-AC88U?

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[jetspeed]

Anyone running IPv6 notice that if you set custom DNS servers, the modem will completely ignore it and use the default of the internet provider?

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[jetspeed]

SH wrote:

which device your running test ?

It fails on Windows 10 and other devices (e.g. iPad).

I already had the firewall rule enabled, hence my question about whether it was working properly on the 88U.

Is the IPv6 ICMP test working for you?

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[jetspeed]

UK Sentinel wrote:

but not WAN to LAN unless you change an option in the Firewall configuration Settings. Unsure if last option is yet available via ASUS DSL-AC88U.

Yes, this is what my original question pertains to. I don’t see anything in the firewall configuration.

If anyone could run https://ipv6-test.com/ and report back if they are also having ICMP being filtered.

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[jetspeed]

Does anyone know if IPv6 ICMP messages are filtered by 88U or allowed to pass (as recommended)?

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[jetspeed]

Just an update before I have to turn off the power (for household maintenance).

FW 503 is the most stable for me. Current uptime of 22 days without my previous issues of the DNS dropping out or the box locking up.

The memory usage is also far superior:

FW503 – 169MB (at reboot) -> 192MB (after 22 days) ~ 1MB loss/day

FW591 – 179MB (at reboot) -> 314MB (after 22 days) ~ 6MB loss/day

I’m also convinced DSL sync is 3Mbps higher, just through observation. Perhaps the DSL drivers has a better algorithm in noisy line conditions.

 

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[jetspeed]

My initial observations is that FW503 is much better.

There is NO change in RAM usage after 24 hours. Previously with 585/591,I would lose 6MB each day. Perhaps the memory leaks on those firmware is having other undesired side effects.

Another note, the VDSL max sync rate is around 2Mbps higher with less FEC errors. Not sure if that’s just the current line conditions so will monitor.

I will post back in a couple of weeks if the above observations still hold true.

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[jetspeed]

UK Sentinel wrote:

Never used it myself, but worth changing to say Google DNS for testing purposes as I am sure issue is not firmware related. https://downdetector.co.uk/problems/cloudflare Are you using IPv4 or IPv6 ?

Interesting, I’m thinking it’s firmware. With the router DNS not responding, I’m still able to get the internet working if setting client’s DNS server to Cloudflare or Google directly.

I’m using IPv4. Anyhow, I will have some answers if I manage to get my usual uptime with FW503.

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[jetspeed]

FW 585 also is no good. Same DNS and lockup issues. Uptime has been 4  days and then 10 days before needing a reboot. Going back to 503!

Just out of curiosity, is anyone else using Cloudflare as DNS?

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[jetspeed]

UK Sentinel wrote:

I have heard from ASUS this morning that the next Firmware release for the DSL-AC88U and DSL-AC3100 has been delayed until Mid August/ early September.

Will that be the official firmware or beta? I’ve never used the betas, but might do so given my issues.

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[jetspeed]

Finally resorted to reverting back to FW585.

The uptime FW591 has been (in days): 38, 5, 9, 34, 13, 17, 1, 3

591 has been frustratingly unstable with lockups and DNS failures. In the case where the DNS stops, I found I can get internet working again by setting the clients to use a direct DNS server (e.g. 1.1.1.1) instead of using the routers.

Also, I noticed something that might give a clue to the lockups – the LAN LED would flash continuously despite me unplugging all ethernet devices.

If you could pass these on the ASUS, then maybe “one day” they can fix it :P

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[jetspeed]

Are ASUS aware of the issues with 591? Or should we still be reporting them?

Just yesterday, I had the same issue where router was pingable, but no internet, and was not able to get into the admin UI.

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[jetspeed]

Not sure if this is memory leak related, but woke up to find there was no internet connectivity.

Unlike other times, I was able to log into the admin page and check what’s going on.

• Uptime 34 days, memory usage 85%
• DSL link was up, but no data flowing
• Pings to google failed.
• Systems log show nothing of interest

I suspect the DNS resolution in the modem router was not longer operational. Rebooted and all good again.

Firmware 591 is definitely not as stable as previous firmwares.

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[jetspeed]

pavlf wrote:

I’m at 38 days since last reboot with 591, but the last time was one of those massive RAM consumption events that led to the GUI becoming inaccessible. I’ve no idea what caused it. It came about quickly, not over a period of weeks.

I’m not so sure the lockup is caused by the RAM usage. I experienced the lockup at 5 and 9 days. When I checked the RAM usage the day before, it was under 50% in both cases.

I did manage to login one time and saw the DNS and DHCP processes restart in the log. So something else may be at play here…

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