I spend few years using linux "for fun" but I seriously lack network skills.
I want to learn the basis so it can be a plus when I'm looking for jobs offers.
As for network, I can only do extremely simple things likewhois ping dnslookup.
I still live in a dorm and there's a firewall.
There's also a firewall in my university network.
I want to try for example to let my computer turned on in my room and access it on my campus via ssh but I have no idea where to start.
>>53782036
do a networking course, jesus christ
>>53782036
Are you trying study CCNA? Is a good start, try it.
>>53782127
>>53782151
Do you know courses / tutorials which provide practical examples?
I tried to read some pdfs and attended two classes on the subject but it was either too abstract (just plain talking) or only obscure details so I ended up learning nothing useful.
http://www.cybrary.it
get smart motherfucker.
Have fun finding hidden problems and getting yelled at for not putting out the fires before they even started.
>>53782452
holy shit, thanks so fucking much!!
I'm not OP but I just started studying for A+
>>53782036
Serous awnser: read manual for Allied Telesis AT-24xx switch. It teaches you pretty much everything what is in CCNA and more. And is free
>>53782248
Mmm a good resource is the INE videos, they uses a very good examples.
>>53782476
I am downloading it, thanks.
>>53782482
You mean these ones https://www.youtube.com/user/INEtraining/videos ?
>>53782476
>>53782573
Here is link, just in case: https://mega.nz/#!A1U0QbbZ!i_yXrIczoFIz0SyVhbq8epJPcjEzqqw---S6yVBMcYk
comer is one of the best. VP of research at Cisco; Purdue Professor now.
>>53782615
thanks
>>53782573
Yes but download those from torrent because in YouTube is only 4 videos of the course.
Good luck with your studies
>>53782658
Thanks.
I don't know much of how internet "really works" (which is the purpose of this thread) and I'm too chicken to download from torrents.
I don't understand how downloads can be traced and how it is different from direct download.
My guess is that ISP can guess I torrent if I am downloading and uploading from / to various IP addresses small sized data, whereas direct download is just asking for one source, but I could be wrong.
maybe it is passing through different ports but I have no idea what it means.
>>53782702
I live in the third World and that shit doesnt exist here.
Why dont you buy a VPN and your traffic Will be redirect to another country and passed to your computer vía Tunnel, your isp cant detect your downloads. They Will only see ssl traffic or ipsec traffic.
Seriously just start studying for a Network+ certification and maybe A+ too from CompTIA. even if you dont go and get the official certification the amount you can learn from the free material out there to pass those exams is truly invaluable.
Why don't you fire up some minimal Linux distribution instances[1] and play around with BIRD[2]? You'll learn networking and its concepts in a vendor neutral way.
Everybody here keeps pushing for learning Cisco stuff, but networking is far bigger than just their implementations.
[1] Think of virtual machines or containers. A minimal installation takes a few MiBs of storage, and no more than 64MiB RAM each.
[2] http://bird.network.cz/
>>53782983
You mean such as https://www.youtube.com/watch?v=pgJEhzIRfMY ?
>>53783706
I'm a beginner and though your link seems interesting, I feel like it's targeted to experimented users.
>>53783735
>experimented users.
What do you mean?
>>53783765
Maybe it's me being dumb but the user's guide assumes the user is already familiar with networking.
>>53783796
My bad, maybe the learning curve is indeed a little too long for beginners.
>>53782248
networking is abstract, you dipshit. It is pure theory which MAYBE will used somehow somewhere.
>>53782702
Your ISP can't reliably find out if you torrent, and doesn't give a shit either. The ones who care are the copyright holders. If they know a torrent of their stuff, they can simply find out the IP address of all seeders and leachers, then they write your ISP who writes you. Unless you have big copyright holders actively trying to defend their shit against torrenting (mostly big publishers, that is), you're safe.
>>53783814
No problem. I have a lot to chew so I think the best strategy is to attack piece by piece and "understand what I'm doing" if I want the knowledge to stick on my brain.
>>53782151
>>53782036
If you know a little bit start with CCNA. If you know nothing start with Net+ .
Good vids can be found online with CBT nuggets or INE. You will need to practice lab and you can do that with Packet Tracer, GNS3, or actual equipment. CCNA is achievable in a few months. Will cost about 300 for the exam.
>i want to ssh to my computer from around the campus
Very unlikely you will be able to. The firewalls/ACLs will be pretty much be blocking every port. Unless youre on the same subnet it wont happen. You may get lucky and they may have a poorly designed network. If they do then you dont need to set anything up. Just ssh to your IP
Youre better off using something like TeamViewer or VNC
>>53783838
I'm in Japan and everyone keeps speaking how "dangerous it is to torrent stuff" so I am afraid.
One dude I know received a letter from the government about illegally downloading some games. He came back in his home country (for unrelated reason) and let it sink. No idea what the issue became.
>>53783867
Thanks for the info.
>>53783969
use a VPN if youre worried about downloading
>>53783969
Well, games, music and movies have the biggest publishers behind them, so they're the riskiest. The risks of torrenting are exaggerated most of the time, but it depends on the country you're in. Italy mostly doesn't give a fuck, now that I moved to Germoney I have to be a tad more careful (like, torrenting only older stuff). Of course I could use a VPN and just be done with it... But if I had the money for a VPN I would just buy my shit directly.
>>53783840
I think this anon >>53782983 suggested something valuable. I'm not saying you should get certified, but this course will learn you a lot. You can probably torrent a CBT nugget series for Network+.
>>53784042
Forgot to mention it's best to torrent using a VPN.
>>53782471
You also have Prof. Messer website with free A+ and Net+ videos, pretty good imho
>>53782036
OP, dl Wendell Odom's CCNA book and Todd Lammle CCNA book
Also, if you want to know more about the theory (not recommended until you know CCNA) you should dl Kurose's Computer Netowrking and Tanenbaum's Computer Networks
After that just learn CCNP from Chris Bryant
>>53784003
>>53784056
is a free vpn doing the job (besides speed) or should I really spend money (i.e. linking the account to my real bank account)?
>>53784139
Thanks for the references. I'll look into it.
>>53784175
most free ones are shit
link to a paypal account not your actual bank account
>>53784139
>just learn ccnp after
better get some experience before becoming a paper ccnp
>>53784228
>better get some experience before becoming a paper ccnp
Of course, i just gave him material that's good, it's actually pretty stupid to learn ccnp without any experience on real equipment
>>53784228
>most free ones are shit
why?
>>53784260
Because the purpose of vpn is anonymity and encryption, do you think someone will provide you and other people with that for free?
>>53784337
What about those who propose you to pay if you want "unlimited speed"?
>>53784574
Honestly i don't know much about VPNs, i live in country which allows torrenting
>>53782036
Computer Networks by tanenbaum / TCP/IP illustrated.
CCNA is trash but good for general knowledge.
>>53784723
It's infinitely times better to learn CCNA first and actually how to connect 2 routers in stead of knowing whole Tanenbaum's book and still not knowing the shit you're doing
>>53784723
>>>53782036 (OP)
>Computer Networks by tanenbaum / TCP/IP illustrated.
Yes, it clearly outlines the concepts which you can apply everywhere.
>CCNA is trash but good for general knowledge.
No, it's too vendor biased and doesn't cover network concepts in general.
>>53784790
>No, it's too vendor biased and doesn't cover network concepts in general.
Have you actually read any of the CCNA books? Odom's/Lammle's? They are perfect for anyone mate
>>53784807
I did, I have my CCNP. I also did a masters in CS, so I can compare the two worlds.
Cisco CCNA just wants you to know, at a very, very basic level what some of the concepts are, and then spends a very, very significant part on how to apply this on their equipment. It's very vendor biased, which is of course to be expected, but realise the world is bigger than Cisco.
>>53784863
What else is there except Cisco? Mikrotik and what else? I'm interested in this whole networking world
>>53784884
HP (Proliant), Allied Telesis/Telesyn, Bell, Juniper, Netgear, DLink, etc.
>>53784884
>What else is there except Cisco?
This is exactly what I'm talking about. All you guys care for is company names, while it's actually the technology and concepts in general that matters. ISPs and their upstream providers realise that, for one. But if you insist on something practical, you can learn a lot of networking by just building your own virtual topologies with Quagga or BIRD, in a vendor neutral way.
>>53784884
Im not that guy but there are tons of other vendors
brocade, extreme, arista, juniper, dell, hp
and thats just routing and switching.
firewalls/ASAs are a different bunch
i also have my CCNA RS and Wireless, CCNP RS, and Net+
CCNA is for Cisco networking.
Net+ is vendor neutral
>>53782036
Read and build your own network.
some software i can recommend:
proxmox ve for virtualization
http://pve.proxmox.com/
VyOS or pfSense for router/firewall
http://vyos.net/
https://www.pfsense.org/
some CentOS based Server like Nethserver or SMEServer
http://www.nethserver.org/
https://wiki.contribs.org/
Nice to play with:
http://italc.sourceforge.net/
http://www.opsi.org/
https://www.cendio.com/
http://www.spiceworks.com/
http://www.freenas.org/
http://www.scalix.com/
http://www.agorum.com/
>>53785219
What is behind the locked door? Why does it need more protection than the cables? Why has it a lock when you can remove the entire panel with just 4 screws?
I need to know!
>>53785302
i hide the my gold reserves in it...
nah, it doesn't make sense but the case was cheap.
>>53782036
read this
http://www.tarfandestan.com/forum/attachments/128415d1364149567-fqo47-computer-networking-a-topdown-approach-6th-edition-pdf
and do that
>>53785219
>>53784940
>All you guys care for is company names
Listen, OP probably wants to actually work with some equipment, not just read about theory
>>53785635
Yes, but I believe you should start with theory in order to apply it in practise, with whatever equipment you see fit.
I suggested the Network+ course earlier, to begin with. Not get himself certified, but to just learn some of the concepts, without reading the famous Tanenbaum book which may be very daunting to beginners.
>>53785635
what about freesco?
http://www.freesco.info/
>>53785807
unknown/10
>>53785807
This project is not built with security in mind. You can do all this with your own favourite Linux distribution + BIRD for routing. The Linux kernel itself already provides bridging/switching capabilities for layer 2.
Here's a question, why the fuck would anyone use Static NAT, for what purpose
>i have 3 public addresses, let's translate 3 private ones into my 3 public ones for lulz
literally why?
>>53785868
Replace BIRD with Quagga for a 'Cisco IOS-like' interface for configuration.
>>53785869
That's obly assuming you have 3 public IPv4 addresses at your disposal.
>>53785889
static NAT is 1to1 translation, 3 was just an example. Question remains: what purpose does it serve to translate 1 public into 1 private and vice versa
>>53785868
it's (imo) not ready for production use. But maybe a nice tool for education.
I will try this next for security reasons:
http://securityrouter.org/
>>53785898
If your internal IPv4 address is a private[1] address, then you would need to translate it to a public IPv4 address for routing over the Internet. Private addresses aren't routable over the Internet.
[1] https://tools.ietf.org/html/rfc1918
>>53785949
Well duh, i know that. But if you can do PAT or even Dynamic NAT, why in the hell would anyone do Static NAT?
>>53785943
>>>53785868 (You)
>it's (imo) not ready for production use. But maybe a nice tool for education.
For educational purposes it would more sense, but not for production.
>I will try this next for security reasons:
>http://securityrouter.org/
Seems better, but I don't see why you couldn't do this with a regular BSD or Linux distribution.
>>53785958
Because PAT and DNAT were invented after SNAT. That's like arguing why anyone would prefer ATM over MPLS.
>>53782036
get a couple of old computers, get an old sonicwall or cisco firewall/router or a Cisco Firewall+VPN device and just tinker. Make a site to site VPN, SFTP, and make a DHCP server using windows 2012 server 160 day evaluation. Windows domain admin will put hair on your chest. Linux is easy because you can plainly see from the command you are using EXACTLY what you are doing. Windows, you hit a GUI button or update a service, and shit can break. Whether it is custom code that is network reliant, and an update stops a service, for example (dotnet framework anyone?). Anyhow, give those a shot. Math is easy(IP/dns) design is hard (a system that both runs and is maintained).
>>53785971
>Seems better, but I don't see why you couldn't do this with a regular BSD or Linux distribution.
Just because i'm lazy and the webinterface looks cozy. at this moment i run pfsense, but "based on OpenBSD" is so catchy.
>>53786006
But what was in their minds when they invented Static, it didn't have any purpose even back then?
Lets say i get the job as network designer/architect for small companies. They don't have any network whatsoever and i'm the first to install everything. I guess for the sake of my future (and other potential admins) i need to make some network documentation. What software do you use to actually map the network. I know GNS/Packet tracer can do it, but is there any software that actually made only for that?
tl;dr How do you make documentation for networks?
>>53786024
use it to send all incoming packets to your proper firewall instead of your shitty DSL-Router and call it "exposed host".
>>53786024
It did[1], and it made DNAT and PAT possible, which built on these concepts.
NAT itself is actually one of the very reasons why IPv6 hasn't caught on globally yet, even after almost two decades since its first RFC[2] was published. One of the very reasons to do IPv6 is because we're running out of IPv4 addresses, which NAT helped postpone by several years. If it wasn't for NAT, ISPs all over the world would all have moved to IPv6 much, much sooner.
[1] https://tools.ietf.org/html/rfc2663
[2] https://tools.ietf.org/html/rfc2460
>>53786086
http://www.i-doit.org
>tfw fell for the networking meme
This probably applies to all IT fields but whenever I learn something new with networks I inevitably forget concepts I learned earlier.
And of course job listings expect you to know everything, including shit not related to normal Networking skills.
>>53786321
>I inevitably forget concepts I learned earlier.
like Token Ring?
>>53786345
Token ring sounds like some MMA tournament
>>53786345
like Pokemon games, he can only know several skills, so has to unlearn something in order to learn something new.
>>53786291
Something else? This doesn't really suit my noob needs
>>53786425
http://www.networknotepad.com/
>>53786444
That's more like it
>>53786399
In a certain kind it is.
>>53786345
>>53786422
It just really gets absurd when everything is laid on top of each other. Switching, routing, routing protocols, firewalls, tunnels, access lists, nats, dhcp, hsrp, vendor differences, wireless, Gui vs Cli.
Ill think im getting firm handle on something only to have something else throw a confusing wrench in the works.
Read this:
http://intronetworks.cs.luc.edu/current/html/index.html
You can safely skip chapters 13, 14 and 15 unless you *really* want to know everything.
Also find a program called Packet Tracer. It's Cisco's network simulator. Buggy, but very useful. It simulates routers, switches, end devices, connections and more. It can even do routing (RIP, OSPF, BPG and Cisco's own EIGRP).
>>53786499
yeah, sometimes it's pretty depressing... I'm a sysadmin, but also qualified industrial mechanic. sometimes i seriously wish to go back to this job...
>>53786584
I'm also majoring in an industrial topic but looking at the job offers, there seems to be a higher demand for sysadmins. So I am wondering about learning myself some skills to eventually maybe do sysadmin stuff. I don't especially like it but I don't especially hate it either.
What are the worst parts about a sysadmin daily life?
>>53786847
if everything runs as supposed, it's just boring. If something goes down, you have to fucking know everything ralated to any IT-relevant topic, because the one thing you don't remember causes the happening. it's like to be in constant standby just to suddenly go from 0 to 100 in 1 sec.
I'm about 15 years in this job. it's so fucking exhausting constantly to stay up to date. I'm tired.
>>53786972
Did you ever need to go from scratch, the whole system was broken as fuck?
What areas of IT do i have to know the best to be a sysadmin?
>>53787004
>Did you ever need to go from scratch
when I switched to my current employer, i had to manage a big pile of shit. so i decided to go from scratch. was a hard piece of work, but worth it.
>What areas of IT do i have to know the best to be a sysadmin?
I love to work with production machinery like installing and supporting CNC or SPS controlled nodes. that makes fun, is diverse and at the end you have a solid result.
>>53787100
>SPS
*PLC
>>53785219
Freenas and pfsense doesn't learn you networking, if you want to do something like pfsense you'll build it trom scratch like freebsd/openbsd router + firewalling / IDS/ips
>>53787799
Best thing to do get some old switches/router and play with it the easy way is Cisco equipment and read some ccna book and go play.
Hard way do router stuff from any OS ( Linux,BSDs ) and Cisco switches or any other brand where you have to dig up the manual of it & read along.
>>53782036
Look up shit about SSH and server making/managing. I've been reading a bit about that on installgentoo.
Also, if you don't have it, get the gentooman's library.
>>53788086
To be fair, this is direction of sysadmin, SSH you need to know but everyone thats into IT should atleast know SSH.
You barely touch servers on a real networking job, you touch alot of cables and router/switches.
General server knowledge is good but don't get in on the sysadmin things if you want to do networking, you should begin with routing/switching if you want to learn more about networking.
Is reading Kevin mitnick books relevant to get started into business network security?
