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MUM Europe 2020

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by webformix
Sat Jun 22, 2019 10:22 pm
Forum: Scripting
Topic: Script to tell if an IP is in a Firewall Address List (or) how to match an IP in an IP range like 1.2.3.4-1.2.3.40
Replies: 0
Views: 435

Script to tell if an IP is in a Firewall Address List (or) how to match an IP in an IP range like 1.2.3.4-1.2.3.40

So I need to be able to tell if a given IP address is represented in a given /ip firewall address-list list. However, I know of at least three ways that can happen. add list="test" address="1.2.3.4" comment="Directly Mentioned" add list="test" address="1.2.3.0/26" comment="Part of a subnet" add list...
by webformix
Sat Jun 24, 2017 2:24 am
Forum: General
Topic: NAT appears to be duplicating outbound packets
Replies: 1
Views: 334

NAT appears to be duplicating outbound packets

We're having a problem where private IPs in our office LAN experience an interesting set of bad network troubles stemming apparently from all NAT egress traffic packets getting duplicated. We have NAT working fine on other routers, but this one uses ipip tunnels to communicate through it's local DIA...
by webformix
Wed May 31, 2017 2:12 am
Forum: RouterBOARD hardware
Topic: RB1100AH Router and Netboot application not seeing each other
Replies: 3
Views: 575

Re: RB1100AH Router and Netboot application not seeing each other

Yep, I don't even see the bootp packets unless I connect to ether13. :3 Laptop is Windows 7 with no VM involved, MT is either RB v5.x or v6.x.. but 5.x more likely. Though I doubt we're getting that far. I could look up the bootloader version but I feel like the packets not being responded to on the...
by webformix
Mon May 29, 2017 11:20 am
Forum: RouterBOARD hardware
Topic: RB1100AH Router and Netboot application not seeing each other
Replies: 3
Views: 575

RB1100AH Router and Netboot application not seeing each other

Good day, we are trying to netboot an RB1100AH using netinstall 6.39.1.exe. We have serial into the MT working fine, and can get the RouterBoot menu, but every time it tries to request bootp there is no answer from Netinstall application. We can run wireshark and see the bootp request packets from t...
by webformix
Thu Jul 25, 2013 3:20 am
Forum: General
Topic: SNMP no Response
Replies: 33
Views: 16089

Re: SNMP no Response

I just noticed this problem on ROS 5.24. nmap of working router -sU -p161 says "161/udp open", nmap of problem router says "161/udp open|filtered". No other connectivity problems to router management IP, can winbox and access via port 80 and ping and ssh. Packet sniff on problem router clarifies tha...
by webformix
Tue May 01, 2012 12:31 am
Forum: General
Topic: Help please : ssh tunnelling
Replies: 16
Views: 14441

Re: Help please : ssh tunnelling

Sorry to bump an old thread, but I've run into this problem and just found a few short-term solutions on this related thread in the cisco forums: https://supportforums.cisco.com/thread/2013927 The consensus appears to be, at least partially, that this is a bug (or unexpected behavior or ssh-server i...
by webformix
Mon Apr 09, 2012 10:07 pm
Forum: Forwarding Protocols
Topic: OSPF + MPLS.
Replies: 9
Views: 3500

Re: OSPF + MPLS.

Hey, I'm not saying it's not. Just clarifying the workaround someone else suggested to get previous poster, or anyone else who googles and finds the thread who may be in a similar enough boat, through the day. :D
by webformix
Sat Apr 07, 2012 2:34 am
Forum: Forwarding Protocols
Topic: OSPF + MPLS.
Replies: 9
Views: 3500

Re: OSPF + MPLS.

(yeah, old, but Google searches lead here so it's worth answering the question) I assume you're using the virtual link to allow Area 2 to be adjacent to OSPF backbone area 0, correct? Make sure R2 and R3 can ping each other at their loopback IPs, via Area1. Create EoIP tunnel endpoints on R2 and R3,...
by webformix
Fri Mar 09, 2012 2:17 am
Forum: General
Topic: DHCP relay problems on RouterOS v5.12
Replies: 2
Views: 941

Re: DHCP relay problems on RouterOS v5.14

Confirmed issue remains in v5.14, we'll keep posting more data as it becomes available. Prior to 5.8 this was much easier to replicate on the testbench, but now it seems difficult to replicate anywhere but the production server so the data gathering and testing is a bit slower. It's possible that hu...
by webformix
Wed Mar 07, 2012 5:51 am
Forum: General
Topic: DHCP relay problems on RouterOS v5.12
Replies: 2
Views: 941

DHCP relay problems on RouterOS v5.12

This is very similar to the problem fixed in v5.8 , but we're still seeing this in 5.12. Soon we'll be able to report if still seeing it in 5.14, but nothing else in the recent changelogs mention DHCP. Confirmed on one RB1200 router, and two different RB1100 routers thus far. No luck so far replicat...
by webformix
Wed Feb 22, 2012 4:41 am
Forum: General
Topic: DHCP relay not forwarding requests
Replies: 11
Views: 8836

Re: DHCP relay not forwarding requests

I am seeing a similar issue on RouterOS 5.12. I understand 5.13 just came out, I am currently working both to boil down a testcase for this problem on the bench, and to confirm it's still occurring in 5.13. Confirmed on RB1200 router, and two different RB1100 routers thus far. We are converting our ...
by webformix
Sat Apr 17, 2010 11:38 am
Forum: Beginner Basics
Topic: difficulties with simple static routes after v4.5 upgrade
Replies: 0
Views: 529

difficulties with simple static routes after v4.5 upgrade

Hey guys, how is it going? So we've recently upgraded all of our v3.x RB333 and RB433 backhaul gear to v4.5. No complaints so far, except that in some cases the devices appear to stop responding on their management IP addresses. They still pass traffic, but can no longer be pinged or managed on any ...
by webformix
Fri May 01, 2009 8:23 pm
Forum: Beginner Basics
Topic: 3.22 web upgrade broken?
Replies: 3
Views: 792

Re: 3.22 web upgrade broken?

Any tips on upgrading via dragging to the files menu? I tried what you mentioned... the combined/NPK package transferred and appeared in the file list (it's the only file that was there BTW). I rebooted the Mikrotik, and it hadn't updated, and the file had disappeared, and the file list was empty.
by webformix
Thu Apr 30, 2009 9:24 pm
Forum: Beginner Basics
Topic: 3.22 web upgrade broken?
Replies: 3
Views: 792

3.22 web upgrade broken?

Hello there, we recently upgraded our MT's to 3.22, and now we're having some issues upgrading to 3.23. We usually use the web GUI to upgrade, and use the upload feature from there, but it appears to be broken as of 3.22. I select the combined, stable package for my platform (routeros-mipsbe-3.23.np...
by webformix
Fri Mar 27, 2009 7:12 pm
Forum: Wireless Networking
Topic: RB433 + (2) XR5's + ROS3.22 = crazy high CPU usage?
Replies: 5
Views: 1011

Re: RB433 + (2) XR5's + ROS3.22 = crazy high CPU usage?

That seems to have helped some. Disabling ANI on both wireless interfaces appears to have reduced CPU load by around 20-30%. It still jumps up to 90-100% sometimes, but not nearly as often... it's no longer pegged. Thanks for that tip! Do you have any other ideas?
by webformix
Fri Mar 27, 2009 1:37 am
Forum: Wireless Networking
Topic: RB433 + (2) XR5's + ROS3.22 = crazy high CPU usage?
Replies: 5
Views: 1011

Re: RB433 + (2) XR5's + ROS3.22 = crazy high CPU usage?

OK, ANI: Adaptive Noise Immunity? If yes, then it's enabled on both sides. On the parent it's set to "ap and client mode" on the wds/slave it's set to 'client mode'.
by webformix
Fri Mar 27, 2009 1:31 am
Forum: Wireless Networking
Topic: RB433 + (2) XR5's + ROS3.22 = crazy high CPU usage?
Replies: 5
Views: 1011

Re: RB433 + (2) XR5's + ROS3.22 = crazy high CPU usage?

Please excuse my ignorance, but what's ANI, and how do I check to see if it's enabled/disabled via WinBox? I could probably look it up using the CLI, but I'm really rusty as I never use it. Thanks!
by webformix
Thu Mar 26, 2009 12:38 am
Forum: Wireless Networking
Topic: RB433 + (2) XR5's + ROS3.22 = crazy high CPU usage?
Replies: 5
Views: 1011

RB433 + (2) XR5's + ROS3.22 = crazy high CPU usage?

We have (2) sets of RB433's, each with (2) XR5 cards acting as a dual backhaul to two different locations (each Mikrotik/RB433 board, has (2) XR5's, and serves as a backhaul to 2 different sites). We're using ROS 3.22 on these backhauls. We've noticed that even though these units are not pushing tha...
by webformix
Fri Feb 06, 2009 7:11 pm
Forum: Beginner Basics
Topic: High Session Counts Probroblem
Replies: 1
Views: 414

Re: High Session Counts Probroblem

How is this post relevant to the Mikrotik forum?

The solution is easy; just download removal software or have a professional clean your computer of spyware and viruses. You might have to re-install your OS.
by webformix
Fri Feb 06, 2009 7:01 pm
Forum: Wireless Networking
Topic: Interesting find regarding low signals w/RB333
Replies: 4
Views: 639

Re: Interesting find regarding low signals w/RB333

Hmm... I might be experiencing something like this, but I'm very skeptical that it would be the router board causing this. Could you try putting a different RB333 in place to see if the problem comes back?
by webformix
Thu Feb 05, 2009 9:40 am
Forum: Wireless Networking
Topic: How many Client connected to Mikrotik AP??
Replies: 13
Views: 6234

Re: How many Client connected to Mikrotik AP??

I've posted a screen shot of winbox with a single 802.11B AP, with 106 users connected, pushing just over 6mbps traffic. Some keys to getting these kinds of results: -Relatively low noise floor -Almost all clients are connecting at 11mbps RX/TX with short preamble -We use RTS/frag settings of 512/10...
by webformix
Sun Feb 01, 2009 10:07 pm
Forum: Wireless Networking
Topic: Confused about rts/cts
Replies: 64
Views: 27884

Re: Confused about rts/cts

From what I understand, the RTS/frag settings are set on the client side. You would never set this on the AP. Also, RTS/frag settings seem to be in the realm of voodoo science... some swear by it, others never use it and do just fine. As mentioned above, with nstream preventing the hidden node probl...
by webformix
Sun Feb 01, 2009 9:54 pm
Forum: Wireless Networking
Topic: Advice on IP addresses - wireless and video
Replies: 2
Views: 556

Re: Advice on IP addresses - wireless and video

Why are you using NAT? There's no need to. Just make a flat bridged network. Make sure that on the AP and stations, that you create a bridge and have both the ethernet and wireless interfaces added to them. Your AP should be set to 'AP bridge', and your WDS set to the name of your bridge interface, ...
by webformix
Sun Feb 01, 2009 9:31 pm
Forum: Wireless Networking
Topic: Band 2GHZ-5MHz, 2GHz-10MHz
Replies: 15
Views: 6930

Re: Band 2GHZ-5MHz, 2GHz-10MHz

802.11A/G translates to roughly 1.25 bit per hertz spectral efficiency at the highest modulation (54mbps). So a 20mhz channel width, connected at 54mbps will provide about 25mbps net throughput. If you use a 5mhz channel width, and are connected at 54mbps, you're net throughput would be about 6.25mb...
by webformix
Thu Jan 08, 2009 2:44 am
Forum: Wireless Networking
Topic: 30 KM/19 Miles PTP Links
Replies: 8
Views: 1785

Re: 30 KM/19 Miles PTP Links

RB433+XR5+5ghz wide-band 2foot parabolic dish on each side will give you approx. 30mbps of HDX, TCP throughput on a 20mhz wide channel. I suggest a wide-band 5ghz dish so that if you get the custom frequency license you'll be able to run on any channel in the 5ghz band (in case you run into interfer...
by webformix
Thu Jan 08, 2009 2:19 am
Forum: Wireless Networking
Topic: Big problems with throughput
Replies: 5
Views: 813

Re: Big problems with throughput

You're power -49dB is too high. Try turning down the TX power by 5-8dB on each side and see if your CCQ and throughput improves.
by webformix
Thu Jan 08, 2009 2:08 am
Forum: Wireless Networking
Topic: 2ghz antenna used on a 5ghz radio
Replies: 7
Views: 1058

Re: 2ghz antenna used on a 5ghz radio

You'll see quite a bit of attenuation, but it will work (just not very well). There won't be any damage to the radio or antenna however.
by webformix
Wed Jan 07, 2009 5:16 am
Forum: Wireless Networking
Topic: 5Ghz 10Mhz channels.... multiple frequencies
Replies: 16
Views: 4385

Re: 5Ghz 10Mhz channels.... multiple frequencies

I forgot to answer RK's question. No, the slave/client unit didn't lock up. After rolling up onsite and using my laptop/winbox to access the Mikrotik box, I found out the ghost channel issues. Only after changing to a 20mhz channel width did the issue go away. I would have done more investigating bu...
by webformix
Fri Dec 26, 2008 11:12 pm
Forum: Wireless Networking
Topic: 5Ghz 10Mhz channels.... multiple frequencies
Replies: 16
Views: 4385

Re: 5Ghz 10Mhz channels.... multiple frequencies

I witnessed this strange phenomena today with one of our 5ghz back hauls. We use XR5 cards, with nstream enabled, and ROS 3.17. We tried using a 5mhz channel width and after a few days of stable operation the link when down. When we checked out the client side of the back haul, we found that it was ...
by webformix
Wed Nov 19, 2008 12:55 am
Forum: General
Topic: P2P Limiting pretty much useless on MT now...
Replies: 28
Views: 6432

Re: P2P Limiting pretty much useless on MT now...

I know this probably isn't the answer you want to hear, but limiting P2P, or any specific protocol or traffic is a never ending job. Bittorrent in particular can use random, encrypted ports, and in some cases plane old HTTP, so it's very difficult to match and throttle. In addition; from a moral sta...
by webformix
Sat Nov 15, 2008 4:26 am
Forum: Beginner Basics
Topic: Mikrotik & WiMax
Replies: 19
Views: 5573

Re: Mikrotik & WiMax

I've been checking out this thread and I think it's time i chimed in... We're currently using Airspan 802.16d fixed WiMAX at 3 sites, alongside our 802.11-legacy Mikrotik network. We use the 3.65ghz band in the USA, as it is currently very difficult for most WISP's to afford licensed spectrum. WiMAX...
by webformix
Tue May 20, 2008 8:36 am
Forum: Wireless Networking
Topic: Client Disconnect Issues
Replies: 33
Views: 32072

Re: Client Disconnect Issues

I've submitted this issue to Mikrotik, Tranzeo, and Ubiquiti. Their responses: Mikrotik basically said it was a Tranzeo issue, and they couldn't do anything about it. They claim it has something to do with how fast the AP/ROS can process registration/authentication requests. The Tranzeo is requestin...
by webformix
Sat May 17, 2008 7:33 am
Forum: General
Topic: Kill Canopys
Replies: 69
Views: 18297

Re: Kill Canopys

We usually do the same, that is make sure we're in good with the tower owner so more equipment won't be put up that might interfere.... unfortunately, there are many towers on this site, so they just threw their stuff up on a near by tower (100m away). We tried to talk to the tower owner, but they r...
by webformix
Sat May 17, 2008 7:05 am
Forum: General
Topic: Kill Canopys
Replies: 69
Views: 18297

Re: Kill Canopys

I feel you! :( Another ISP recently decided to throw up a bunch of 2.4ghz Canopy gear, onto a site that we've been running 2.4ghz Tranzeo for a few years now. We started noticing latency issues, and lots of random dropped packets. We've been trying to work with him and co-exist peacefully, but he re...
by webformix
Fri Apr 25, 2008 4:58 am
Forum: Wireless Networking
Topic: Client Disconnect Issues
Replies: 33
Views: 32072

Re: Client Disconnect Issues

Sent in all information to Mikrotik support, including supout.rif. Waiting for response.
by webformix
Thu Apr 24, 2008 7:45 am
Forum: Wireless Networking
Topic: How long can 2.4Ghz go
Replies: 9
Views: 2121

Re: How long can 2.4Ghz go

A 15dBi omni will have a 'pancake' like radiation pattern.. e.g it will be very flat, meaning that if you mount it up high, the signal may go 'over' the clients you're trying to hit (in a typical WISP PtMP setup). Also, omni's tend to perform quite poorly in high-noise environments because they're r...
by webformix
Thu Apr 24, 2008 7:21 am
Forum: Wireless Networking
Topic: tranzeo cpq drop connections with sr2
Replies: 12
Views: 2647

Re: tranzeo cpq drop connections with sr2

Semaphore, where do you set the "AP rekey" to in Winbox? Do you have to set it from the CLI? We use WPA1/AES and have these sporadic disconnect issues. In addition, jwcn.... I believe the hardware retries are set to 4 by default in newer releases of ROS. This issue (at least in my situation) has not...
by webformix
Sun Apr 20, 2008 6:03 am
Forum: Wireless Networking
Topic: How long can 2.4Ghz go
Replies: 9
Views: 2121

Re: How long can 2.4Ghz go

It largely depends on the what type of antenna is being used (i.e. sector, directional, etc), and where the desired coverage area is. These variables will help to determine how high up the antenna needs to be mounted. As SurferTim mentioned, if you put it up too high, or don't use the correct tilt, ...
by webformix
Sun Apr 20, 2008 5:57 am
Forum: Wireless Networking
Topic: Client Disconnect Issues
Replies: 33
Views: 32072

Re: Client Disconnect Issues

It appears as though more and more people are having this issue. Can you set your wireless logging to debug mode to make it more verbose and check to see if you're getting any of the same errors that I'm getting? Look for stuff like: exchange timeout or received deauth: 4-way handshake timeout (15) ...
by webformix
Sun Apr 20, 2008 5:53 am
Forum: Wireless Networking
Topic: Wireless disconnection messages explained!
Replies: 85
Views: 78578

Re: Wireless disconnection messages explained!

Hey Normis, myself and possibly a growing number of other ROS users are experiencing issues that are detailed in my post @ Client Disconnect Issues This seems to be a ROS + XR2/SR2 + Tranzeo CPQ compatibility issue? I took a look at the list of disconnect messages that you've listed, and was wonderi...
by webformix
Sat Apr 19, 2008 12:19 am
Forum: Wireless Networking
Topic: Problems with Tranzeo client on Mikrotik AP's [RESOLVED]
Replies: 2
Views: 1649

Re: Problems with Tranzeo client on Mikrotik AP's

I believe we may be seeing the same issues. Check out my post, Client Disconnect Issues Take a look at your logs and see if you're having any of the same errors I've listed in my post. Make sure you turn on wireless debugging so that you get all the error messages. We have yet to find a solution for...
by webformix
Fri Apr 18, 2008 8:08 am
Forum: Wireless Networking
Topic: Client Disconnect Issues
Replies: 33
Views: 32072

Re: Client Disconnect Issues

Not sure what you mean by 'change back to 15'. I tried upping the hardware retries to 5-10 without any positive results. It seems as though additional hardware retries do not fix the issue, and the few clients that are able to associate do so much slower compared to the recommended number of 4. I st...
by webformix
Thu Apr 17, 2008 10:07 pm
Forum: Wireless Networking
Topic: Client Disconnect Issues
Replies: 33
Views: 32072

Re: Client Disconnect Issues

They are, and always have been set to 4. I double checked just to make sure :-)
by webformix
Thu Apr 17, 2008 8:06 pm
Forum: Wireless Networking
Topic: Client Disconnect Issues
Replies: 33
Views: 32072

Re: Client Disconnect Issues

The original issues went away after we updated ROS, and had the clients power cycle. Now we're having these issues again with a different, newly installed base station. Exact same configuration as in my first post, except now we're running ROS 3.6. I've tried upgrading to 3.7, and tried tweaking set...
by webformix
Fri Jan 25, 2008 12:50 am
Forum: Wireless Networking
Topic: Client Disconnect Issues
Replies: 33
Views: 32072

Re: Client Disconnect Issues

Downloaded and updated Mikrotik to 3.1. Clients still are showing the same association issues in the log file after rebooting the AP. We discovered that if the clients having issues power cycle their systems they seem to associate correctly. I hope the recent updates fix whatever caused this mystery...
by webformix
Thu Jan 24, 2008 1:37 am
Forum: Wireless Networking
Topic: Client Disconnect Issues
Replies: 33
Views: 32072

Re: Client Disconnect Issues

Thanks for the reply. The hardware retries are currently set to 8. I'm not sure what you mean by upgrade to 3.0 full version? I believe I have the latest and greatest installed @ 3.0rc14. Any other ideas?
by webformix
Thu Jan 24, 2008 12:45 am
Forum: Wireless Networking
Topic: Client Disconnect Issues
Replies: 33
Views: 32072

Client Disconnect Issues

Hello there, we recently installed an RB333 running RouterOS V4 3.0RC14 + XR2 card for PtMP operation. We have about 30 clients, mostly Tranzeo CPQ clients. We use WPA/AES encryption. All clients have the newest firmware installed. Everything was working great with the new system for almost 5 days w...