Community discussions

Search found 21 matches

by DrDeft
Wed May 09, 2018 6:09 pm
Forum: General
Topic: SXT Lite5 ac Tx Rate drops to 6Mbps
Replies: 1
Views: 600

Re: SXT Lite5 ac Tx Rate drops to 6Mbps

TDMA period auto drops packets. But TDMA period size 4ms fine. I set TX power on both devices to 10dBm (13dBm MIMO? ). In this configuration TX/RX signal streinght is -45/-45. TX Rate doesn't drops more from 780Mbps to 6Mbps. Just from 780Mbps to 702Mbps. Is TX/RX signal streinght is -45/-45 safe fo...
by DrDeft
Wed May 09, 2018 10:47 am
Forum: General
Topic: SXT Lite5 ac Tx Rate drops to 6Mbps
Replies: 1
Views: 600

SXT Lite5 ac Tx Rate drops to 6Mbps

Hello. I have installed SXT Lite5 ac instead of SXT Lite 5 and have a bug. When Channel width 20/40/80Mhz Ceee Band 5Ghz-only-AC is selected Tx Rate is dropping from 780Mbps to 6Mbps all the time with packets losts. When I use 20/40Mhz Ce 5Ghz-only-AC then Tx Rate is dropping much seldom from 360Mbp...
by DrDeft
Tue Aug 02, 2016 10:20 am
Forum: RouterBOARD hardware
Topic: USB 2.0 ethernet adapter
Replies: 0
Views: 794

USB 2.0 ethernet adapter

Hi, everybody. I want to share some hardware experience with you. Here is the USB Ethernet 100Mbit adapter working fine with Mikrotik 6.36. Model number - KBT010185 - chipset Asix AX8872B. Price - 4$. Found it on Aliexpress. Is't real speed is 100Mbit (97 Mbit on speedtest). All drivers are build in...
by DrDeft
Sat Jun 18, 2016 9:20 pm
Forum: Announcements
Topic: v6.34.6 [bugfix] is released!
Replies: 60
Views: 19130

Re: v6.34.6 [bugfix] is released!

6.34.6 is Bugged on RB2011

Little network with 8 users and low traffic. Today router stucked. Reboot helped in this situation.

Profiling
http://puu.sh/pxmSP/897ba95573.png

CPU Load 100%
http://puu.sh/pxmKq/fab14396e8.png

Reverted to 6.34.3
by DrDeft
Wed Apr 08, 2015 11:39 am
Forum: Announcements
Topic: v6.28 final RC testing
Replies: 92
Views: 31745

Re: v6.28 final RC testing

Switches mikrotik without igms snooping and DHCP snooping is cheap toys ! Why these toys you produce?
+1
by DrDeft
Wed Apr 08, 2015 9:14 am
Forum: Announcements
Topic: v6.28 final RC testing
Replies: 92
Views: 31745

Re: v6.28 final RC testing

RB1100AHx2 v6.27 http://puu.sh/h5LXn/32a96e0e88.png There is no cable connected to ether10, but log tells that link on ether10 is up/down often. MAC adresses on ether10 and LANs_bridge are the same - 00:D4:FF:6D:53:10 No problems are detected, but I can't understand why is it happening with port10 o...
by DrDeft
Sun Nov 30, 2014 3:04 am
Forum: Beginner Basics
Topic: Blocking DNS amplification DDoS is using your routerboard
Replies: 4
Views: 2700

Blocking DNS amplification DDoS is using your routerboard

Today my ping on mikrotik routerboard growed up to 350ms and CPU load to 100%. After adding this 2 firewall rules problem was eleminated. Will be usefull to block this attack using Mikrotik DNS Server. /ip firewall filter add action=add-src-to-address-list address-list="dns flood" address-list-timeo...
by DrDeft
Wed Nov 12, 2014 8:15 am
Forum: General
Topic: v6.21.1 released
Replies: 112
Views: 27827

Re: v6.21.1 released

yes +1
by DrDeft
Thu Mar 13, 2014 3:15 pm
Forum: General
Topic: v6.10 released
Replies: 248
Views: 82852

Re: v6.10 released

http://forum.mikrotik.com/viewtopic.php?f=1&t=79914 Hi I have a customers who love your products, are subject to DDoS attacks (SYN flood), and it hurts that Mikrotik doesn't have "notrack" target, just SYN flood over his CCR will knock down CPU to 100%. And if it had -j NOTRACK (or newer kernels: -j...
by DrDeft
Sun Feb 02, 2014 3:55 pm
Forum: General
Topic: raw table, NOTRACK, SYN flood
Replies: 9
Views: 7126

Re: raw table, NOTRACK, SYN flood

Is it fixed in ROS 6.9 ?
by DrDeft
Fri Jan 10, 2014 9:54 pm
Forum: General
Topic: raw table, NOTRACK, SYN flood
Replies: 9
Views: 7126

Re: raw table, NOTRACK, SYN flood

up_
by DrDeft
Fri Dec 20, 2013 3:08 pm
Forum: General
Topic: raw table, NOTRACK, SYN flood
Replies: 9
Views: 7126

Re: raw table, NOTRACK, SYN flood

u_p
by DrDeft
Sat Dec 14, 2013 7:44 pm
Forum: General
Topic: raw table, NOTRACK, SYN flood
Replies: 9
Views: 7126

Re: raw table, NOTRACK, SYN flood

We can confirm this issue. Impossible to solve issue on any version ov RouterOS. Anybody can cause 100% CPU load on CCR oe any other Mikrotik router. Ih hurts...
by DrDeft
Wed Feb 20, 2013 1:38 am
Forum: General
Topic: RouterOS v6rc10 pre-released
Replies: 79
Views: 15699

Re: RouterOS v6rc10 pre-released

There is the big problem after upgrading RouterOS rc9 to rc10. All information (screenshots and support files) in the attached zip. On rc10 after reboot some settings dissapeared. Brige interface dissapeares, pridge ports dissapears, dhcp on bridge "LANs" settings stop working, ip on bridge "LANs" s...
by DrDeft
Mon Jul 02, 2012 5:11 pm
Forum: Scripting
Topic: Minecraft server Gamai.Ru DDOS protection
Replies: 14
Views: 6398

Re: Minecraft server Gamai.Ru DDOS protection

My router D-Link DIR-300 DD-WRT 300Mhz CPU had been under atack in past. But that was DOS (not DDOS) atacks. Packet flooding.

Protection rules were useful to prevent this tipe of attack.
by DrDeft
Mon Jul 02, 2012 1:14 pm
Forum: Scripting
Topic: Minecraft server Gamai.Ru DDOS protection
Replies: 14
Views: 6398

Re: Minecraft server Gamai.Ru DDOS protection

So summary I need this rules? To protect Router and Minecradt server. Yes? /ip firewall filter add chain=forward protocol=tcp dst-port=25565 tcp-flags=fin,syn,rst,ack connection-limit=5,32 action=drop add chain=forward protocol=udp dst-port=25565 connection-limit=15,32 action=reject add chain=input ...
by DrDeft
Mon Jul 02, 2012 1:07 pm
Forum: Scripting
Topic: Minecraft server Gamai.Ru DDOS protection
Replies: 14
Views: 6398

Re: Minecraft server Gamai.Ru DDOS protection

Please answer detailed. I'm noob in Mikrotik yet. But protection of Minecraft server is very important.

What are the specific rules (or commands in terminal) I need to accept?
by DrDeft
Mon Jul 02, 2012 12:19 pm
Forum: Scripting
Topic: Minecraft server Gamai.Ru DDOS protection
Replies: 14
Views: 6398

Re: Minecraft server Gamai.Ru DDOS protection

Thaks to everybody. Rules have been accepted.
Are this rules enough to protect Minecraft server?
by DrDeft
Mon Jul 02, 2012 11:41 am
Forum: Scripting
Topic: Minecraft server Gamai.Ru DDOS protection
Replies: 14
Views: 6398

Re: Minecraft server Gamai.Ru DDOS protection

Can there be a syntax error?

add chain=input protocol=tcp dst-port=25565 tcp-flags=fin,syn,rst,ack connection-limit=5/32 action=drop

expected , (line 1 column 92)
by DrDeft
Sat Jun 30, 2012 2:25 pm
Forum: Scripting
Topic: Minecraft server Gamai.Ru DDOS protection
Replies: 14
Views: 6398

Minecraft server Gamai.Ru DDOS protection

RouterBoard Mikrotik 751G-2HnD firmware 2.39 RouterOS 5.18 . Minecraft online game server Gamai.Ru . 100 Megabits upload/download channel. Minecraft uses ports 25565 TCP/UDP. Last router D-Link DIR-300 had this protection rules in configuration: iptables -A INPUT -p tcp -m tcp --dport 25565 --tcp-f...