MTIN is growing again

Over the years MTIN has gone from being a computer repair shop to a dial-up ISP, to a Wireless ISP, and many things in-between.  Each time technology and market conditions change we adapt to change with it.  Our next metamorphosis is needed so we can grow into more aspects of the xISP world In order to accomplish this we are splitting into divisions of what we do.

The first is j2sw.com. This part of the business will be focused on personalised WISP services and support.  These will be custom tailored to a limited number of clients.  Projects such as the “Start a WISP” book and upcoming WISP publications will be run under j2sw.com. Other projects that benefit the ISP community will run from j2sw.com. Having j2sw Consulting as a separate arm allows for better personal attention to key customers.

The second division of the business is MTIN.NET.  This arm will be focused on business to business services such as data center co-location, network connectivity, tower services, and related type services. MTIN is becoming a project management company. We will leverage our vast partnerships to leverage the strength of many to accomplish your medium to large projects.   MTIN will be an umbrella company to bring in the right people for the right projects.

Look for changes to the websites and contact information coming over the next month or so. Justin will be involved with each entity on a very regular basis, but having extra folks can allow for time to be dedicated to ever-expanding projects without sacrificing service to the client.

Some FAQs
Why the change?
For a couple of reasons. The first is to leverage Justin being known in the xISP community.  having a face to the consulting side. This allows for better personal service as well as a trusted name in the WISP community. Secondly, is to allow a better division of resources based on projects and individual needs.

Is MTIN going away?
No, MTIN will move into a project management type of company.  We have access to a large network of contractors, partners, service providers, and other groups we have built since 1998. MTIN can bring in needed resources for projects under one contact point. This allows for projects to not depend on just one person.

Will contact info change?
In the upcoming months, we will be publishing updated contact info. The old information will not go away, but things will get routed to the proper folks better.

For now check out http://j2sw.com and like jswconsulting on facebook.

Use tarpit vs drop for scripts blocking attackers

There are many scripts out there, especially on Mikrotik, which list drop as the action for denying bad guy traffic.  While this isn’t wrong, you could put the tarpit action to better use for actions which are dropping attacking type of traffic.

So what is Tarpit?
Tarpit is fairly simple. When connections come in and are “tarpitted” they don’t go back out. The connection is accepted, but when data transfer begins to happen, the TCP window size is set to zero.  This means no data can be transferred during the session.  The session is held open, and requests from the sender (aka attacker) to close the session are ignored. They must wait for the connection to timeout.

So what’s the downside?
TCP is not really designed to hold onto a connection.  It can be additional overhead on a taxed system.  Most modern firewalls can handle tarpitting without an issue. However, if you get thousands of connections it can overwhelm a system or a particular protocol.

How can I use it?
If you have scripts, such as the SSH drop off the Mikrotik wiki, simply change the action to “tarpit” instead of “drop”.

Open Letter to the FCC about CBRS

An open letter regarding:

GN Docket No. 12-354
RM-11788
RM-11789

I am writing on behalf of my Company MTIN.NET LLC in regard to the proposed changes to the CBRS band. We are primarily a consulting company for Wireless Internet Providers (WISPs). One of the biggest changes our customers face is the availability of spectrum to operate in.  These are companies who primarily are investing their own money into providing access in their own communities.  They help to support local businesses by giving them a choice in high-speed broadband access. Sometimes, these WISPs are the only option.

Please take into consideration how any changes will affect these Entrepreneurs and their mission to bring broadband into underserved areas of the country.   Without WISPs, many homes and businesses would not have high-speed access that works with Voice, or streaming services.  Satellite is unable to deliver low-latency connections to users.

The ability of a WISP to have access to more spectrum not only allows them to provider more speeds and better service, but it has other benefits as well. WISPs have usually been started to fill a broadband need in an area.  Having access to high-speed access allows schools to offer greater learning tools, allows businesses to generate new revenue streams as well as saving money.  Please don’t leave the companies who are investing their own money, not shareholder’s money, out in the cold.

We are opposed to both petitions by CTIA and T-mobile. Please consider the comments from the WISP community before making any decisions. It is estimated WISPs service over 3 Million subscribers across the country.  Give them tools they need to thrive.

Server SSH Attempts

For those of you who are curious where many of your cyber attacks appear to come from the following is a sample of just some of the locations the MTIN servers have blocked for malicious attempts.

#1 CN/China/
#2 KR/Korea, Republic of
#3 CZ/Czech Republic

Russian IPs are # 7 and US (mainly AWS IPs) are #8

 

MTIN announces the support crate plan

Are you a WISP who needs just a little help now and then? Need a sanity check on configuration changes? Need someone who knows your network enough to say whether you need that most recent software upgrade?  Don’t have a big budget for the occasional issue? Need peace of mind you can call someone who won’t break the bank on a simple question? MTIN has a solution for you.

We are calling this the “Supply Drop Plan”. it’s designed for the WISP who needs someone who knows their network and their business for occasional questions outside of their comfort zone.  It consists of the following:
-2 Hours of consulting time a month.
-Reasonable amount of e-mail questions
-Be put on our e-mail notification list of relevant information
$89 a month.

Details
-Access to MTIN via phone during business hours or pre-arranged time (24 hour notice).
-e-mail questions tracked via a ticket system with a maximum of 24 hour response.  Most of the time same day.
-1 year contract

Just some things you can do with your two hours
-Have our engineers look at any new configurations you want to implement
-Unbiased advice on what equipment to order
-Help source equipment for wireless deployments on towers
-Make recommendations on upgrades
-Do audits on things like upstream providers, etc.

What’s not included
-Emergency support (we have plans for that). Emergency support is available but at non-contract rates on a first come first serve basis.
-Additional hours can be purchased on an as-needed basis.  Please note without an hourly block you will be first come first serve.
-Phone calls after hours must be pre-arranged. We can accommodate your schedule. Otherwise, support will be billed at after hours rates.

DMCA Designated Agent Directory updates

The following text is directly from: https://www.copyright.gov/dmca-directory/ 

A relevant F.A.Q. can be found at https://www.copyright.gov/dmca-directory/faq.html

Service Provider Designation of Agent to Receive Notifications of Claimed Infringement

The Digital Millennium Copyright Act (“DMCA”) provides safe harbors from copyright infringement liability for online service providers. In order to qualify for safe harbor protection, certain kinds of service providers—for example, those that allow users to post or store material on their systems, and search engines, directories, and other information location tools— must designate an agent to receive notifications of claimed copyright infringement. To designate an agent, a service provider must do two things: (1) make certain contact information for the agent available to the public on its website; and (2) provide the same information to the Copyright Office, which maintains a centralized online directory of designated agent contact information for public use. The service provider must also ensure that this information is up to date.

In December 2016, the Office introduced an online registration system and electronically generated directory to replace the Office’s old paper-based system and directory. Accordingly, the Office no longer accepts paper designations. To designate an agent, a service provider must register with and use the Office’s online system.

Transition period: Any service provider that has designated an agent with the Office prior to December 1, 2016, in order to maintain an active designation with the Office, must submit a new designation electronically using the online registration system by December 31, 2017. Any designation not made through the online registration system will expire and become invalid after December 31, 2017. Until then, the Copyright Office will maintain two directories of designated agents: the directory consisting of paper designations made pursuant to the Office’s prior interim regulations which were in effect between November 3, 1998 and November 30, 2016 (the “old directory”), and the directory consisting of designations made electronically through the online registration system (the “new directory”). During the transition period, a compliant designation in either the old directory or the new directory will satisfy the service provider’s obligation under section 512(c)(2) to designate an agent with the Copyright Office. During the transition period, to search for a service provider’s most up-to-date designation, begin by using the new directory. The old directory should only be consulted if a service provider has not yet designated an agent in the new directory.

Antenna Interference issues

Recently, we had a client question why we didn’t mount antennas higher up on a tower with an FM repeater on it. The top of the tower has an FM repeater on it so we mounted the equipment about 25 feet below that.

When you are talking about antennas and transmitters the basic thing to remember is it’s all radiation.   Good antennas have predictable drop off patterns and, when paired with a good transmitter, have crisp frequency drop offs.  However, there is still radiation emitting from feedline and the antenna on the tower. Many FM repeaters use a dipole design.  Some are folded, others are different types.  Below is an antenna pattern from a Dipole antenna.

As you can see there are a few patterns radiating from the antenna.  These patterns should be taken into consideration when mounting your equipment near FM, UHF, or VHF systems. Radiation may interfere with things such as your cat-5, or your PIM.  In an earlier article, I talk about low-pim cables and what affects PIM.  This is very important when you are deploying LTE gear.  RF radiation from high power transmitters can cause PIM issues if the wavelength happens to coincide with the wavelength of the other transmitter.  This does not mean they are on the same frequency.  Remember, in RF you have full wave, 3/4,1/2, and 1/4 wavelengths to deal with.

Other things to consider are near and far field patterns.  If you want some heavy reading you can read about it on Wikipedia.

Our next issue and the most common issue is the radiation getting into our Ethernet cables as well as our radios on the tower.  Below illustrates the propagation of signals coming out of an antenna on the top of the tower.  If you notice, some of the radiation is directed underneath of the antenna. Any equipment mounted too close underneath will be bombarded with radiation.

Too much radiation can cause link negotiation issues,  signal degradation,  and other issues.  By moving our antennas out of the patterns of other antennas we can make for a more reliable system.  This is one case where higher on the tower is not always better. Just because another antenna is not mounted in front of another it does not mean they are in each other’s radiated patterns.

Quick Reference: OSPF Network Types

Point-to-multipoint is treated as a collection of point-to-point links and thus no DR/BDR is required.

Point-to-Point is a single link and no election is needed.

Broadcast: OSPF routers on broadcast networks will elect a DR and a BDR (since it is multiaccess) – OSPF packets are multicast.

NBMA: Routers will elect DR and BDR (since it is multiaccess), but since it is a non-broadcast, routers will have to communicate via unicast rather than multicast.