Community discussions

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by owsugde
Thu Jul 04, 2019 2:06 pm
Forum: Announcements
Topic: v6.45.1 [stable] is released!
Replies: 416
Views: 61197

Re: v6.45.1 [stable] is released!

owsugde - Is it possible that you are using a certificate verification feature which was introduced in this release? "ovpn - added "verify-server-certificate" parameter for OVPN client (CVE-2018-10066)" I don't think this is it, because a cold reboot done by the customer "fixed" it. At this time I ...
by owsugde
Wed Jul 03, 2019 9:52 pm
Forum: Announcements
Topic: v6.45.1 [stable] is released!
Replies: 416
Views: 61197

Re: v6.45.1 [stable] is released!

All I can say is be very careful with this update. I have rolled it out on some remote devices, and now, one isn't having ethernet connectivity at all (at the least) and the other isn't coming back up over OVPN. Can't say more about what has caused this in particular, yet. Probably will have to be o...
by owsugde
Fri Feb 15, 2019 10:50 am
Forum: Announcements
Topic: v6.43.12 [stable] is released!
Replies: 49
Views: 11648

Re: v6.43.12 [stable] is released!

It appears that UBNT is fighting the same problem (how to detect RADAR and not detect other pulses). The before-latest UBNT firmware introduces the same problem as MikroTik has had for years.... I had read that too. With the latest firmwares, my DFS detects went from zero to zero :D . Even if it ac...
by owsugde
Wed Feb 13, 2019 4:00 pm
Forum: Announcements
Topic: v6.43.12 [stable] is released!
Replies: 49
Views: 11648

Re: v6.43.12 [stable] is released!

My biggest problem with MT wireless right now is the sensitivity of DFS detection. Even in relatively clear environments, I get far too many DFS changes each day. In urban settings with close device proximities and generally full spectrum, it just becomes ridiculous, with devices continually "detect...
by owsugde
Thu Oct 11, 2018 1:51 pm
Forum: Announcements
Topic: v6.43.1 [stable] and v6.43.2 [stable] are released!
Replies: 186
Views: 37475

Re: v6.43.1 [stable] and v6.43.2 [stable] is released!

Changes in this release: *) routerboot - fixed RouterOS booting on devices with particular NAND memory (introduced in v6.43); I suspect this fix to be incomplete, to say the least. Several of my wAP ac's in the field have become quite unstable, especially on reboots. Not sure if by .43.x or specifi...
by owsugde
Tue Jun 19, 2018 1:40 pm
Forum: Announcements
Topic: v6.43rc [release candidate] is released!
Replies: 557
Views: 109567

Re: v6.43rc [release candidate] is released!

How could you think that 60g will work without clear line of sight? That's just wireless PHY basics. The smaller the wavelength gets, the penetrative wave properties decrease rapidly but the reflective ones increase. Think low/medium frequency ≈ broadcast radio (goes literally straight through the ...
by owsugde
Wed Jun 13, 2018 10:56 pm
Forum: Announcements
Topic: v6.43rc [release candidate] is released!
Replies: 557
Views: 109567

Re: v6.43rc [release candidate] is released!

*) w60g - improved link stability;
*) w60g - improved maximum link distance;
Can anyone already quantify this in some way?

I'd like to know, because two NLoS pathways I tried were ever so slightly too far / too faint as of rc21/23. Maybe after some improvements they could actually work.
by owsugde
Thu May 24, 2018 11:15 am
Forum: Announcements
Topic: v6.43rc [release candidate] is released!
Replies: 557
Views: 109567

Re: v6.43rc [release candidate] is released!

Also got enticed to install rc17 because of features and fixes but then couldn't login. Old Winbox did work though. Thanks for the tip!
by owsugde
Wed Feb 21, 2018 3:27 pm
Forum: Announcements
Topic: v6.42rc [release candidate] is released!
Replies: 538
Views: 94399

Re: v6.42rc [release candidate] is released!

Oh OK, I was under the impression that the problem was with updating from rc20 to rc24. Didn't know it was even worse than that.
by owsugde
Wed Feb 21, 2018 3:17 pm
Forum: Announcements
Topic: v6.42rc [release candidate] is released!
Replies: 538
Views: 94399

Re: v6.42rc [release candidate] is released!

Installing 6.42rc30 from rc20 makes the RB3011 unbootable! See other descriptions of update bug.

Updated from rc20 to rc30, didn't boot back up. Resetting didn't do anything, so I had to netinstall back the stable. And that even only worked after three tries. :shock:
by owsugde
Fri Feb 16, 2018 7:10 pm
Forum: Announcements
Topic: v6.42rc [release candidate] is released!
Replies: 538
Views: 94399

Re: v6.42rc [release candidate] is released!

6.42rc28 wrecked my CHR on libvirtd / Qemu KVM setup. Virtio network interfaces (or any interfaces at all) aren't recognized anymore. Do not install 6.42rc28 on KVM CHR! Still trying to salvage this thing, will write more later... Add: Just managed to get 6.41.2 installed. Had to get the stable pack...
by owsugde
Tue Jan 16, 2018 7:03 pm
Forum: Wireless Networking
Topic: Possible critical bug in WMM implementation, Mac OS clients
Replies: 4
Views: 692

Re: Possible critical bug in WMM implementation, Mac OS clients

Just tried on current LEDE (former OpenWRT) release 17.01.4. The Linux kernel in there is of version 4.4.92. I have set up separate networks to route through, so that firewall gets active. WMM is enabled on WiFi and the following firewall rule is running on all packets: iptables -t mangle -A POSTROU...
by owsugde
Mon Jan 15, 2018 5:12 pm
Forum: Wireless Networking
Topic: Possible critical bug in WMM implementation, Mac OS clients
Replies: 4
Views: 692

Re: Possible critical bug in WMM implementation, Mac OS clients

Well who am I to talk to Apple? I wouldn't even know where to write to. On the other hand, if MT could identify a problem here, they could either fix a potential bug if it's on their side, or they could maybe interact with Apple in order to get something going there. That said, I'm looking to try th...
by owsugde
Mon Jan 15, 2018 4:50 pm
Forum: Wireless Networking
Topic: Possible critical bug in WMM implementation, Mac OS clients
Replies: 4
Views: 692

Re: Possible critical bug in WMM implementation, Mac OS clients

Did some more tests on a different device in a whole separate network. Same thing happens generally. I have some new observations to share, though. There seems to be some variability on which specific priorities cause problems. When AMPDU functionality is disabled , prios 1 and 3 seem to not work at...
by owsugde
Sun Jan 14, 2018 11:10 pm
Forum: Wireless Networking
Topic: Possible critical bug in WMM implementation, Mac OS clients
Replies: 4
Views: 692

Possible critical bug in WMM implementation, Mac OS clients

I've come across a very specific, but possibly quite critical problem with MacBooks connected as clients to Mikrotik APs with WMM enabled/required, running the latest ROS 6.41 (stable). The problem seems to be located somewhere in the interplay of the Mikrotik WMM implementation using priorities and...
by owsugde
Thu May 11, 2017 3:08 pm
Forum: General
Topic: Preventing losses of DHCP leases in order not to have hotspot log out users
Replies: 3
Views: 674

Re: Preventing losses of DHCP leases in order not to have hotspot log out users

Nothing new really, still doing the ugly workaround. Haven't come upon a method to influence the DHCP's behavior yet.

Yes, the hotspot controller is set as DHCP authorative without delay.
by owsugde
Wed May 10, 2017 6:53 pm
Forum: Announcements
Topic: v6.39.1 [current]
Replies: 158
Views: 36003

Re: v6.39.1 [current]

Not sure if this has been fixed yet in RC, but anyway, I need to report a (somewhat) critical bug with 6.39(.1): My Netmetal 5 (921UAGS-5SHPacT, the three chainer without PCIe) isn't able to use two transmit antennas anymore (say, chain 1 and 2, and not 0). All three is ok, only one is ok. With two,...
by owsugde
Wed Mar 15, 2017 5:41 pm
Forum: General
Topic: Preventing losses of DHCP leases in order not to have hotspot log out users
Replies: 3
Views: 674

Preventing losses of DHCP leases in order not to have hotspot log out users

I am having trouble with a specific detail of Mikrotik routers used as hotspot gateways. First some context: I'm running hotspot networks with a Mikrotik device as the main gateway. In a roaming environment with several access points bridged together, which is rather the norm, client devices sadly t...
by owsugde
Fri Oct 07, 2016 7:17 pm
Forum: Wireless Networking
Topic: NetMetal antenna configuration - V-V vs. H-V
Replies: 10
Views: 1464

Re: NetMetal antenna configuration - V-V vs. H-V

Yeah well, all mobile communications with moving terminals are severely affected (give or take, depends only on speed really) by Doppler shift, in particular Doppler spread. At least OFDM subchannels are flat-fading, so something will get through often enough. Even if the "orthogonal" part won't wor...
by owsugde
Thu Oct 06, 2016 5:45 pm
Forum: Wireless Networking
Topic: NetMetal antenna configuration - V-V vs. H-V
Replies: 10
Views: 1464

Re: NetMetal antenna configuration - V-V vs. H-V

For the receive part, I'm certain Mikrotik devices do feature spatial diversity gains for every receive antenna chain you activate, by making use of maximal ratio combining (MRC). You can check this happening quite easily in Winbox, Wireless -> Registration -> {radio name} -> Signal. Here, receive s...