Network Operations

Internet Service provider topics, Network operations, and other topics. Some topics include Mikrotik, Cisco, Arista and other configurations.

Another Water Tower Install

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Another water tower install earlier this year for a client. To critique our own work the cables were moved under the mounts after these pictures were taken. this was done to minimize damage to the cables.

WISP Tower leasing Resources

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The following are leasing companies that I have worked with on securing vertical real-estate over the years. This is not a total list of tower companies. If you provide co-location services to Wireless ISPs and want to be included please reach out to me. Donations motivate me to update these lists. Ones with a Star … Read more

How Comcast breaks the IPV6 Internet

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So it used to be I received a /56 IPv6 prefix and then my router picked a /64 for my lan. Then it turned into a /60. Now I get a /64 and my router has to turn that into a /72. Come on Comcast, don’t break IPV6 norms.

Justin’s List of xISP vendors and resources

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I have been working on this list for a while. The following are vendors, manufacturers, and various companies I have dealt with in my career as an ISP owner and consultant. This is not a complete list by any means. These are companies I have dealt with personally and/or are sponsors of this site. Companies … Read more

Denial of Service and the xISP Part 1

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Most service providers have been the victim of a Denial of Service (DoS) attack at one point or another. Sometimes you may not realize you are under an attack. A few months ago, I posted a simple screenshot at https://blog.j2sw.com/networking/anatomy-of-a-ddos/ of what an active DDoS looks like. Types of AttacksIn order to know what to look for … Read more

Quick and Dirty Baicells eNODEB Mikrotik Rules

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If you have a Baicells eNodeB you wish to restrict access to these Mikrotik rules will help. There are some assumptions made. The following rules are meant to be a base for incorporating into your network. /ip firewall filteradd action=drop chain=forward src-address=10.0.0.2 src-port=443 protocol=tcp \   dst-address-list=!baicells_cloudadd action=drop chain=forward src-address=10.0.0.2 src-port=8082 protocol=\   tcp dst-address-list=!baicells_cloudadd action=drop chain=forward src-address=10.0.0.2 src-port=48080 … Read more

Using Splunk to monitor literally everything on Mikrotik

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This content is for Patreon subscribers of the j2 blog. Please consider becoming a Patreon subscriber for as little as $1 a month. This helps to provide higher quality content, more podcasts, and other goodies on this blog.To view this content, you must be a member of Justin’s Patreon Unlock with PatreonAlready a qualifying Patreon … Read more

Proper BGP DENY-ALL filter for mikrotik

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This content is for Patreon subscribers of the j2 blog. Please consider becoming a Patreon subscriber for as little as $1 a month. This helps to provide higher quality content, more podcasts, and other goodies on this blog.To view this content, you must be a member of Justin’s Patreon Unlock with PatreonAlready a qualifying Patreon … Read more

Speed validation for compliance on ISP networks

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Does your ISP network need a way to validate customer speeds? RDOF compliance? State compliance for broadband speeds and latency? as many of you know there are problems with using public speedtest servers to validate customer speeds. J2networks, in conjunction with Aloremnetworks, has an on-premise solution that is easy to manage, small footprint, and scalable. … Read more

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