cyberstudent with basic questions about interface configurations
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/24 is the cider version over using the 255 octets for your subnet mask 192.168.1.1 255.255.255.0 or just 192.168.1.1/24
You have your host address your network, and a broadcast address. this occurs on the private ip class. You have different class addresses also like class a, b, c, for the private addresses. check out subnet calculator. I had to do all this stuff by hand when it was taught at the College. You have to learn how to subnet by hand but the calculator can help you get a start on it.
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@JonathanLee said in cyberstudent with basic questions about interface configurations:
You have different class addresses also like class a, b, c
This hasn't been used in 30 years.. Why they still come up is beyond me.. I learned class because well cidr wasn't even a thing yet when I got into networking. But why it still comes up is just nuts..
An intelligent man is sometimes forced to be drunk to spend time with his fools
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SG-4860 24.11 | Lab VMs 2.8, 24.11 -
Good to know it existed. At some point you're bound to find some ancient documentation referring to it.
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@JonathanLee said in cyberstudent with basic questions about interface configurations:
You have different class addresses also like class a, b, c, for the private addresses
Address classes have been obsolete for about 30 years, replaced by CIDR.
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@stephenw10 said in cyberstudent with basic questions about interface configurations:
Good to know it existed.
And it's also good to know, many years ago, computers were built with vacuum tubes. However, that's totally irrelevant to today's computing. If you want even more "good", we can't forget that before classful addresses, every address was what became known as class A, that is 8 bit network address and 24 bits for the host.
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We use to use candles and whale oil lamps for light as well ;)
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@johnpoz well I feel old now… it still feels like cutting edge technology. I mean 10baseT was the hottest thing since sliced bread a couple years ago… token ring… BNC connectors. Don’t forgot HUBs, I mean what’s a switch we rock massive collision domains here haha.
I was servicing a random site’s network equipment a couple years ago and they still had equipment racked in for an ancient IBM network design topology. It was no longer used and unplugged. But it had epic huge lock in plugs. I had never seen it before. Pre dated BNC stuff. Pre Ethernet. It was wicked cool.
The IBM Multistation Access Unit
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@JonathanLee said in cyberstudent with basic questions about interface configurations:
I mean 10baseT was the hottest thing since sliced bread a couple years ago
It was a bit longer than a couple of years.. But yeah as you get older, 20 years seem like just last week ;)
Doesn't seem like that long ago was installing tcp/ip on the old windows 3.11 machines via a bunch of floppies..
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What we need is to build a firewall on Xenix it has a tcp stack hahaha, use that new April 4th release of pfSense.
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@JonathanLee said in cyberstudent with basic questions about interface configurations:
Pre dated BNC stuff. Pre Ethernet. It was wicked cool.
Actually, Ethernet predated token ring. That MAU is used for token ring. I don't think BNC connectors were ever used for it, just Ethernet and ARCNET.
I used to work for IBM Canada in the late 90s and there were racks full of those MAUs. When I was back on contract a few years later, token ring was nowhere to be found and everything was Ethernet.
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@JKnott it was like they erased history of that network equipment, they don’t talk about MAU at all in any publication for higher education. I wanted to share it as it was an amazing find and rabbit hole to learn what it was for me. I remember token ring in elementary school. But never MAU technology. They had a token ring network for an apple computer lab with bnc cables 10baset stuff all wired in a circle with t connectors it was so cool to see it and work with.
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A while back, last year already, I found these : How To Start An ISP (like it's 1993)
All the big brands, operating systems, all the equipment, most of them I 'heard' about, but never actually saw it.
All I remember is that I had a Robotics Sporter 56K modem (that actually only synced up to 33.6).
Now you can see what was on the other side.No "help me" PM's please. Use the forum, the community will thank you.
Edit : and where are the logs ?? -
That Mac network might have been AppleTalk. (Do Apple computers have Mac addresses?
)MTU is something that should be discussed, otherwise we'll be stuck with 1500 forever. 16 Mb token ring could go almost 18K bytes. I doubt most people even know why 1500 was picked for Ethernet. Back in those days, networks weren't reliable and collisions were expected. So it became a trade off between efficiency and retransmitting lost frames. It became locked in with early Ethernet NICs that were hardware limited and also when 802.3 was introduced and the Ethertype/Length field was used to determine whether it was an Ethernet II or 802.3 frame.
These days, with switches, collisions are history and networks are both much faster and more reliable, so the 1500 MTU has become a bottleneck. I have a cheap TP-Link switch that can handle 16K frames and 9K are often used in data centres, etc.. It's time to move on.
BTW, my first Ethernet experience was with DECNet over 10base5 "Thicknet" and I'm probably the only one here who has ever hand wired an Ethernet controller.
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@Gertjan said in cyberstudent with basic questions about interface configurations:
All I remember is that I had a Robotics Sporter 56K modem (that actually only synced up to 33.6).
I have a Courier (collecting dust in my junque closet). It could deliver 56K down, provided the ISP was on a digital phone connection. Up was always 33.6K max.
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that makes sense... the /32 isnt possible and it makes it a single ip address,
here is an easy one..
What does it mean when the WAN interface is set to DHCP?
Does that mean that PFsense is acting as the dhcp server handing out Ip addresses?i put a pic up
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@Gertjan my wife walked in with this YouTube video running… “are you actually watching dialup?” Ummm yeah!
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@cyberstudentnewbie said in cyberstudent with basic questions about interface configurations:
What does it mean when the WAN interface is set to DHCP?
Does that mean that PFsense is acting as the dhcp server handing out Ip addresses?No, it means pfSense is the DHCP client, getting it's address from the ISP. However, it can also provide a DHCP server on the LAN side, to provide addresses to devices on the LAN.
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@Gertjan said in cyberstudent with basic questions about interface configurations:
A while back, last year already, I found these : How To Start An ISP (like it's 1993)
Several years ago, I set up my own "ISP". I was running Red Hat Linux and configured to to accept calls via dial up modem. My ThinkPad had a modem back then and I was on a cable modem at home. However, I lost that modem, when I upgraded the WiFi from 802.11b to g, as the modem and WiFi shared the same card and the new card didn't have a modem.
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@JKnott
okay so what do i set the WAN to so that pfsense will be my DHCP server?
or do i not want to do that?
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That's not a setting on WAN. You would enable it on internal interfaces from Services > DHCP Server as required.
https://docs.netgate.com/pfsense/en/latest/services/dhcp/ipv4.html
It's enabled on LAN by default.
