Conan the Sysadmin · @conansysadmin
318 followers · 3412 posts · Server mstdn.social

A would-be warrior who cannot read a simple address will get nowhere in this world. Let alone prowl freely within a maze. cromwell-intl.com/networking/i

#subnet

Last updated 1 year ago

So, deployed a new mail server (_long_ overdue)… but noticing lots of miscreants playing password guessing games. (yeah, as if I'd use "password" or "12345678"… yes they tried these.)

Not lots from one IP, but a number scattered over a subnet. `fail2ban` doesn't handle this well.

This is my less-than-perfect subnet catcher for `fail2ban`.

gist.github.com/sjlongland/5a4

#fail2ban #subnet #python #sysadmin

Last updated 1 year ago

Conan the Sysadmin · @conansysadmin
258 followers · 2754 posts · Server mstdn.social

A would-be warrior who cannot read a simple address will get nowhere in this world. Let alone prowl freely within a maze. cromwell-intl.com/networking/i

#subnet

Last updated 1 year ago

Conan the Sysadmin · @conansysadmin
200 followers · 2145 posts · Server mstdn.social

A would-be warrior who cannot read a simple address will get nowhere in this world. Let alone prowl freely within a maze. cromwell-intl.com/networking/i

#subnet

Last updated 2 years ago

Cheatography · @cheatography
5 followers · 171 posts · Server botsin.space

Just released: Network+ | 6.1. IPv4 Cheat Sheet by Aelphi

Download it free at cheatography.com/aelphi/cheat-

Here's their description of it: CompTIA Network+ certification course sum up. Oriented for cybersecurity later courses.

@cheatsheets

#cheatsheet #cheatsheets #network #ip #subnet

Last updated 2 years ago

CryptoNewsBot · @cryptonewsbot
375 followers · 14785 posts · Server schleuss.online

What is a supernet, and how does it work? - A supernet or umbrella network combines multiple smaller networks... - cointelegraph.com/news/what-is

#subnet #supernet #sidechains #blockchain #interoperability #InternetProtocol

Last updated 2 years ago

Conan the Sysadmin · @conansysadmin
171 followers · 1475 posts · Server mstdn.social

A would-be warrior who cannot read a simple address will get nowhere in this world. Let alone prowl freely within a maze. cromwell-intl.com/networking/i

#subnet

Last updated 2 years ago

· @abeorch
50 followers · 149 posts · Server fosstodon.org

I have such a backlog of configuration to do I dont know where to start. Three remote end points to configure. A new multisite bridged for based devices, an solution not to mention working out the routing for my mobile devices running Wireguard. I am feeling tired just listing every thing out. Why does does openwrt have to be so useful?

#openwrt #wireguard #vpn #subnet #wifi #iot #adblock

Last updated 2 years ago

Patrick Koch · @patkoch
16 followers · 10 posts · Server hostux.social

My next blog post explains Virtual using a configuration. It is intended for all who would like to establish their first private network in Azure.

🔗 patrickkoch.dev/posts/post_26/

#azure #network #terraform #azurecommunity #iac #Cloud #microsoft #hashicorp #virtualmachine #subnet #securitygroup

Last updated 2 years ago

Ken Hollis - GandalfDDI · @GandalfDDI
119 followers · 368 posts · Server ioc.exchange

@SwiftOnSecurity My go to quick calculator, Boson subnet utility. And yeah, subneting requires drilling it into your head and just using it for a long enough time to get it set:
boson.com/freeutilities

#subnet

Last updated 2 years ago

Conan the Sysadmin · @conansysadmin
133 followers · 916 posts · Server mstdn.social

A would-be warrior who cannot read a simple address will get nowhere in this world. Let alone prowl freely within a maze. cromwell-intl.com/networking/i

#subnet

Last updated 2 years ago

Conan the Sysadmin · @conansysadmin
96 followers · 616 posts · Server mstdn.social

A would-be warrior who cannot read a simple address will get nowhere in this world. Let alone prowl freely within a maze. cromwell-intl.com/networking/i

#subnet

Last updated 2 years ago

pirate moo🐮 · @apiratemoo
3171 followers · 1253 posts · Server infosec.exchange

Old subnetting notes I had to dig up and refresh on while studying tonight. Enjoy!

Subnetting:

The representations of IP’s and prefixes (our masks) exist for each range. Whenever we see a /8, /16, or /24, the /number is a prefix, so 10.10.10.1 /24 is an address with a prefix. The classes listed for IPv4 aren't actually too scary when you space out exactly what is going on.

Let’s say we have a 255.255.255.0 mask

Try to look at it this way: Class A is X.Y.Y.Y Y being the hosts by number

If we have a /24 and need to understand how this translates:

255.255.255.0 is the value we end up with because the binary equivalent to 255 is 11111111

If we do this for every portion of our mask we get:

11111111.11111111.11111111.00000000

We end up with /24 because we are counting each set of 1's (11111111 + 11111111 + 11111111 = 24).

All we're essentially doing here when we subnet is counting the bits and looking at a mask.
If you look at it this way then the 2n-2 formula makes a lot more sense and becomes clearer.

What would be a /26 ? 11111111.11111111.11111111.11000000 or 24 +2

We added 2 bits to the sum we had when we converted and if we convert 11000000 again, we get 192 as a number. Then we subtract.

** Resources:**
subnetting.org

youtube.com/watch?v=ZxAwQB8TZs

#subnetting #subnet #networking #network #infosec #cidr

Last updated 2 years ago

Chris · @chr1stian
72 followers · 33 posts · Server mastodon.social

quicktip #20: convert an IP range to its exact CIDR subnets with the Linux `netmask` utility.

#linux #cidr #ip #network #ipv4 #Netmask #subnet #router

Last updated 2 years ago

Volkan Özçelik · @volkan
19 followers · 882 posts · Server z2h.dev
DeaDSouL :fedora: :fediverse: · @DeaDSouL
167 followers · 373 posts · Server fosstodon.org
GenghisKen Coar · @GenghisKen
47 followers · 157 posts · Server ruby.social

@baweaver
So I don't know whether to replace the with a higher-end and more capable (such as , if I could afford such), or go with (about the requirements of which I know nothing), or get an additional relatively low-end (read: ) router and put the devices on a separate as originally ideated. Or something else. 🤔

Open to suggestions. Please. My is going spare about not being able to reach the printer.. 🙄🤪😔

#linksys #Nighthawk #r8000 #router #ubiquiti #repeaters #affordable #iot #subnet #sbh

Last updated 2 years ago

Reeter · @Reeter
11 followers · 107 posts · Server pouet.chapril.org

What I always need to understand the network I am working on with my poor developer experience
comparitech.com/net-admin/subn


#subnet #network

Last updated 2 years ago

Virtualcat 😼 · @virtualcat
6 followers · 3862 posts · Server mastodon.online

subnet >
subnet >
szn incoming

#subnet #l2 #Sidechain

Last updated 2 years ago