1. ekze

    AC66U slow with 6in4 - advise on new router

    I've been struggling with my AC66U (old rev.) speed issues, finally I narrowed it down to IPv6. When I enable 6in4, my speed over ipv4 gets capped at around ~130-150 mbps, and router is lagging like crazy (ICMP 20-30ms, unresponsive web), as soon as I disable IPv6, I get ~700-900 mbps without...
  2. R

    Does the AC-1750 B1 (AC66U B1) support WireGuard

    I've been using Merlin for the past couple years. The advanced OpenVPN configuration has been a blessing when it comes to setting up 2 or 3 streaming devices, but it's not very usable for other devices, since the speed is capped at ~20 Mbps due to the single-threaded nature of OpenVPN and the...
  3. S

    AC66U OpenVPN Entware

    Hi all, I am running a DSL-AC88U (Stock ASUS build as no custom firmware avaliable) and have a RT-AC66U as access point, running asus-merlin and entware. I would like to setup the AC66U to run all its traffic (transmission server, plus some other little devices) through a VPN (ExpressVPN), but...
  4. T

    AC66U non-B1 crashing rebooting daily

    Reboots itself every 1-3 days. Currently running merlin 380.69_2 Started failing on Merlin RT-AC66U_380.70_0 long after updating it. Have tried stock from ASUS FW_RT_AC66U_300438251641 Have tried merlin fork RT-AC66U_374.43_41E6j9527 using the restoration utility reset to factory defaults on...
  5. A

    ASUS RT-AC66U-New Modem caused Drop in Speed

    I have had a Cable internet connection for years. The AC66U did just fine. Fiber optic internet became available and I just switched over. That meant a new modem/router combo. The modem router combo runs n as it's fastest wifi. However, after testing with and without my AC router, my speed...
  6. dugaduga

    Device(s) entered Promiscuous mode, internet goes down, what happened?

    I had an issue today, internet stopped working, everything, even tor, then the following: After a reboot everything was back to normal. I saw nothing "promiscuous" in logs dating back to the 13'th, these are fresh. Any idea what this means? Thanks
  7. T

    Ac66u b1 1.75A power supply

    Hello :) i am trying to get a really good deal sorted. 1 ac66u b1 and 1 ac66u for 20 bucks. b1 is missing power supply and ac66u is missing an antenna. I currently have a spare n66u which has a 1.58A power supply. But the b1 is demanding 1.75A power supply, is it possible to run the b1 on a...
  8. Rogfitz

    AC66U as AP Merlin 380.70 Guest network restrict LAN access

    I have an Asus AC5300 as primary router, gateway and DHCP server and an AC66U as a secondary AP. On the AC66U I have created a Wifi Guest Network that I don't want to access my LAN. Only the AC5300 for internet access and a single Chromecast. I get this to work when using stock firmware...
  9. Y

    What to do with RT-AC66U?

    Hi everyone, I've recently acquired a second hand ac66u. As far as I can tell it's not the _b1 version (2usb2 ports, no usb3 and no indication on any model number). It's been recommended to me to flash the merlin firmware, but I've read that the most recent one is not supporting my model. The...
  10. G

    Asus ax88u Asus ac87u asus ac66u

    hi i have 3 asus linked togheter. but i get a funny IP on one of them but when looking in client list i see it with a ip. why is that? cant figuer it out and did not get any help from asus. i use merlin on all router beside the old ac66u i have tried ax88u is the main unit...
  11. R

    RT-AC66U 380.70 Recovery mode has no IP

    Hello, I'm trying to recover my AC66U from 380.70 to Merlin fork 374.43_39E1 When I put the router into recovery mode and the power light is blinking, the router does not seem to have the expected IP address How can I do this (without a serial cable please) Ronald
  12. S

    How I bypassed Asus and installed Tomato on my RT-AC66U

    A friend recently gave me his Asus RT-AC66U and said I was free to play around with it and experiment. After realizing that OpenWRT and DD-WRT were not viable firmware options, I looked in to Tomato. Seeing tons of successful installs on this particular router, I decided to give it a while...
  13. O

    DNSSEC suddenly stopped working on Asus RT-AC66U (running on Merlin v380.70)

    Hi, I have my Asus RT-AC66U running Merlin v380.70. The DNSSEC option (under LAN > DHCP) has been enabled for as long as I can remember but yesterday it suddenly started acting up. I could no longer resolve any DNS host names which were enabled for DNSSEC. Same results on all my DHCP clients...
  14. Marsi4eg

    AC66U crashes and reboots itself when Android phone connects to its Wifi

    I've got a new phone (HTC U12 +) and ran into a very strange problem - very often (not always, more likely after wifi module on the phone goes off and then back on) when connecting the phone to the AC66U network, on both ranges, it does not matter 5 or 2.4 GHz, router goes into reboot. Never...
  15. A

    AC66u B1 NTFS problem

    Hello. I've read a lot about ntfs vs ext in linux. I have a brand new WD MyPassport Ultra 4TB which is used with Windows PCs and laptops. So ntfs is the only choise. Now I want to use it with my AC66u B1 router (Firmware Version: When I plug it into USB3 (or USB2) interface...
  16. P

    RT-AC66U router + Powerline and second router?

    I have an RT-AC66U as my main router downstairs. WiFi is spotty upstairs, so I've been trying to extend it using a couple of Powerline adapters I had lying around and a second cheap router I bought, but I keep running into problems. As I understand it, this is the procedure: you copy the WiFi...
  17. A

    [RT-AC66U] Issues flashing brand new router - HELP

    Hi all, TL;DR: I have a brand new RT-AC66U, that I am trying to firmware flash. It seemed to go right during the flashing, but now I can't access it at all. I've tried flashing it a number of times, with different firmwares, and I get the exact same error. Here's what I do to flash it: Reset...
  18. S

    AC66U Strange speed behavior

    After upgrading my internet service to 200/10, I've noticed some strange behavior with my AC66u (currently on 380.68_4 firmware, though problem existed with older firmware as well). Initially, I was only getting download speeds of about 140mbps max on all devices, both on wifi and wired to the...
  19. B

    RT-AC1900 - Hardware or Software issue ?

    Hi, having an issue with my router. Got the AC1900U on friday, installed Merlin's latest FW (non Beta), and set up my AC66U as a repeater. Everything worked great till Tuesday morning, had no LAN Internet and WiFi was turned off. Only way to log into it was by resetting it. Decided to try the...
  20. Earthlark

    Can't access AiCloud on AC66U

    I've been trying for the last couple days to get AiCloud working so I can access a network share, but I can't seem to get anywhere. I'm able to access the drive from within the network Samba and FTP without any problem. But upon entering the Asus DDNS or IP address just gives me a "This site...