Nmap - Firewall Evasion (Decoys, MTU & Fragmentation)

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In this video, I demonstrate various techniques that can be used to evade firewalls and IDS's with Nmap. Nmap is a free and open-source network scanner created by Gordon Lyon. Nmap is used to discover hosts and services on a computer network by sending packets and analyzing the responses. Nmap provides a number of features for probing computer networks, including host discovery and service and operating system detection.
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26 июл 2020

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Комментарии : 121

@anothersonnyday936 2 года назад

It would be great to show proof of purpose and reasons to perform any of this in a real world scenario where networks aren't flat and ports aren't always open. Otherwise, this is just punching in commands just for fun and proving theory. The decoy is exactly what it means, a "decoy". Not to be confused with spoofing which I felt was how it was sold here. The original source still appeared in Wireshark (10.x IP) whether it is changed to random decoys or assigned. It would be great if the video showed port scanning that shows up as closed or filtered, and then show us how to bypass that Firewall/IDS filtered state given the decoy and the fragmentation methods to the point Nmap eventually show an open port by using those methods. Just a suggestion!

@samiehessi8163 4 года назад

From manual: -D decoy Causes a decoy scan to be performed, which makes it appear to the remote host that the host(s) you specify as decoys are scanning the target network *too*. It should be mentioned that decoy doesn't really hide your IP; it just makes the target's task difficult to figure out which one of the IPs is doing scanning. Otherwise how would your host receive SYN-ACK.

@iliaschannel3646 3 года назад

HI bro how we can use proxychains with nmap ??

@cxdva8635 Год назад

@@iliaschannel3646 Yep but it's pretty slow

@c1ph3rpunk 4 года назад

Most modern IDS, especially one on a firewall you have to traverse, will look at ARP data and see the packets coming from a different host and will either alarm on spoofing or completely block (and alarm). You’re far better off reducing the number of ports scanned (don’t scan all 65,535, only what you need) and going low and slow to evade IDS and SIEM traffic flow detections. Which, also brings up a point, it’s not just firewall IDS you must avoid, there are also the SIEM traffic flow monitors to watch out for and they’re often more sensitive than the firewall based IDS.

@p4nz9r60 4 года назад

ARP data matters only if you scanning in the same network segment. If you're scanning across different networks (ie. from the outside) ARP data will always point to the ingress router port for ALL packets that enter the target network, be it a malicious or regular traffic.

@c1ph3rpunk 4 года назад

P4nz9R correct, in most of the video they refer to same LAN so I pointed that out. Wildfire will alert on it if the source is on one interface and the dest is on an interface on the same firewall.

@drum4life22630 4 года назад

Yes! I was literally looking for a video like this on your channel this past weekend.

@jacko646697 3 года назад

Can you further explain why Fragmentation would be useful here? Since what we try to do is a Syn Scan, meaning we dont actually have to have application data encapsulated. Fragmentation leaves the Ethernet and IP/TCP Headers intact for each packet and only fragments aplpication data inside. How would that evade a firewall which only works on IP/TCP level?

@aasdguuu4916 4 года назад

The vid quality is mad heat congrats man u really deserve it ❤️

@EnitinEnitin 4 года назад

He said RST means the port is open. Which is literally the opposite... ._. RST means it's closed.

@zoozeezoozee6726 3 года назад

Thank you for so much details explained

@abodawead9039 2 года назад

thank you very much , good job full of useful information .

@AmericanRastafari 4 года назад

Thank you for this video. Please make a new refreshed guide as to installing kali onto a usb as well as testing. I’ve advised my students to be careful due to people forgetting how dangerous testing can be. FYI*

@whitedevil2231 4 года назад

this is a very helpful video

@ashishshivhare2574 4 года назад

thanks sir for your support....from india

@愛 4 года назад

yesss more nmap

@jhonkeith118 4 года назад

شكرا مقطع جميل جدا اتمنى لك التقدم⚘⚘⚘✋🏻

@omkarlohar6446 Год назад

Thank you ❤️

@chandankumarpradhan95 4 года назад

Hello Sir , I really like your Tutorials, Videos . thank you 🔥🔥🔥🔥 ❤️❤️❤️❤️ From INDIA धन्यवाद 🙏🙏🙏🙏

@siddhantsambyal5054 4 года назад

Very nice

@faique2995 4 года назад

Fabulous

@gvrkrishna4857 4 года назад

Hey HackerSploit, can you make a video on how to split and switch between terminals on the kali 2020 which supports this features out of the box without the need of tmux.

@ITHunt- 4 года назад

Nice video

@hyperlight3092 4 года назад

Nice

@adityaprakash1314 4 года назад

I m huge fan sir ❤️❤️❤️❤️😇😇

@CiRiC664 4 года назад

Hello, is this how we avoid the filter because only tcp or udp header present on the first fragment?

@philtoa334 4 года назад

thx

@shubhampatil9074 4 года назад

please make video on IDS and honeypot evasion also!

@thebcx9661 4 года назад

Just got the notification, took a cup of coffee, enjoying the video and then ..

@gauravsehwag2172 4 года назад

@hackersploit Hey! I just have a little doubt. Is this whole playlist in the order in which a beginner should learn things. I went through the playlist and certain videos that (i think) are in middle which should be in the beginning. Please help

@8080VB 3 года назад

Yh great.

@loklishplays9562 6 месяцев назад

Great video and explenations as always! I am just unsure of 1 thing, why do you write --send-eth on the decoy and fragmenting scan you do? What does --send-eth mean or do?

@jrpasinski 2 года назад

I am running Kali Linux in the cloud. When I use Wireshark to analyse the nmap output, it has the [PSH] phrase with purple colour coding around it and does not display the output above. Really frustrating!

@norman5474 4 года назад

If I use the Decoy command with an ip which is in my local network, to be more 'discreet' I also need to change my MAC address? Because the source in Wireshark is my MAC adress.

@followgoddy-wills4015 2 года назад

Why did we get two ports opened after using a differnt addresss in 7:00 - 7:57

@nutpiro343 3 года назад

is there a way to scan a windows 10 host with a firewall because it displays that all ports are filtered

@cypher4036 4 года назад

Please put the example of bug bounty from starting to finish that how to start how to submit report all

@sureshv7675 4 года назад

Sir.Please Make videos of Buffer overflow.

@florentwinamou6650 3 года назад

thx bro, how can we get the mac address of the victim with this method, because when there is a firewall it is not easy?

@khumanpuremba3479 4 года назад

Sir, Is there any tool like Lazagne that works in Android?

@rawkstar952 2 года назад

I have a question. Since we spoofed the ip, how come we stil receive the response? since the server will send a packet with the fake ip that we used

@merincs8744 4 года назад

I have a small doubt, when using Decoy, we can also see your host ip 10.0.0.X along with other Decoy IPs sending SYN probes to the target. Why is that? Is there anyway to completely avoid them?

@giftonpaulimmanuel146 Год назад

no dude we can't. we should use either a proxy or tor or something to hide our ip.

@EnitinEnitin 4 года назад

When the host gives you a RST it doesn't mean the port is open... I means it's closed... It literally means "Reset".

@umeshnagar4092 2 года назад

Yeah I also thinks the same. RST means port is closed.

@lonedragon255 4 года назад

finally! been waiting for this for so long!

@prakharmishra3000 4 года назад

Why were you waiting?🤔

@lonedragon255 4 года назад

@@prakharmishra3000 thats because he would make one on this topic and he is pretty much the best teacher there is on you tube on ethical hacking

@prakharmishra3000 4 года назад

@@lonedragon255 you were waiting for this topic or a video from this channel?

@prakharmishra3000 4 года назад

If you were waiting for this topic, why

@lonedragon255 4 года назад

@@prakharmishra3000 was waiting for the topic... im learning offensive security on my own as of right now. this channel has helped me a lot

@ElliyahuRosha 4 года назад

What will happen if i put the ip of the scanned machine itself?

@enos5192 4 года назад

Yes, ma Babe Is back... LOl

@pankajchaturvedi3176 3 года назад

Why do we use "send eth"? Thank you.

@Hack2WRLD 3 года назад

Can we use list of Decoy IPs ???

@i_am_dumb1070 10 месяцев назад

I dont understanding where are these random ip using RND in decoy scan comming from ?

@yourstankfully3354 3 года назад

Alexis man..!!! i love you..!!!

@payas0jan355 4 года назад

what kind of zsh theme you use

@rahulshah1559 3 года назад

what is that 10.0.0.4 of? can someone explain? 6:36

@veeppiaar1722 4 года назад

is this similar to zombie scan? nmap -Pn -sI

@gz4589 4 года назад

I doubt this works nowadays as the attacker needs the zombie to send IP packets with predictable ids. And not, that technique is different it uses another computer (the zombie) to scan the target for you. You check the IP's id to know if the zombie has replied to the target, for instance when the target sends back to the zombie a SYN-ACK packet.

@samuelsamuel9087 4 года назад

Why nano/etc/proxyserver.config showing an empty terminal space

@darklord_656 4 года назад

Sir make tutorials about pwncat

@Manojkumar__ 4 года назад

Why your Udemy course are not available now??

@PrathamKumar_ 4 года назад

Hi sir, I have a doubt. I had asked my friend to give me his IP(both public and private). We both live in different states. When I had searched about the public IP of his network by using whois command, it gave me same info as when I had searched about my public IP address. Why? Then I had switched to his private IP, I got nothing from it but when I searched the entire subnet then I was shocked that it gave me my info (my laptop, mobile, and virtual box), this makes me confused. I was using Nmap.

@pinkyakp Год назад

Hmm i thought when u scan your frnd private IP hmm then u will get nothing from that IP about your frnd because his private IP is work in only his network so for scanning your frnd private ip address u should under your frnd ip address

@CyberSecuritySimplified 4 года назад

Make video on owasp top 10 or sans 25 series.

@erlin7125 Год назад

Why does - -send-eth change the fragmentation size, the manual only says it’s used to send frames instead of packets? Can somebody clarify that for me.

@erlin7125 Год назад

I’ll answer my own question, this happens because nmap only supports fragmentation features on raw packets. So if you don’t specify - -send-eth option it will not fragment those packets because they are IP packets as opposed to layer 2 frames

@taurohkea2169 3 года назад

i really wonder what happens when you use 127.0.0.1 as decoy :D and can you use target IP as decoy?

@giftonpaulimmanuel146 Год назад

yes u could use both the loopback and the target IP. It would look like the attacks came from these IPs too along with your real IP.

@swapnilshinde9868 4 года назад

No video on webscraping? Hackersploit

@HimanshuSingh-pd8mi 4 года назад

Macbook air 2017 is good for hacking aur not ????

@siik-ghostface 4 года назад

Hello,... question. What online password attack tool will use long and large generated wordlist without need of proxy.txt file?

@siik-ghostface 4 года назад

I have a generated 8 charset wordlist named by me hackd.txt, my OS is kali rolling 2020 edition so my default Linux password was previously kali, my default username is oc course kali, instead of root. Quotation marks don't appear in terminal when drag and droping a wordlist file into the terminal....so if your kali is an old previous version before 2020 edition version then drag and droped files may show quotation marks on yours, but for me it doesn't. I tried THC Hydra but it only works with small wordlists instead of large long ones. Got any great recommendations that will work crack online web accounts with large generated wordlists? Your vids are very educational and helpful by the way....I noticed.

@gz4589 4 года назад

Isn't the MTU the Ethernet's payload? If so, when you specify --mtu 24, why it doesn't show as a fragmented packet? the IP header is 20 bytes long (without options) and then you have 20 more bytes of TCP header, which should be cut off into five chunks of 4 bytes. Does anybody know why it didn't work here? BTW nice video ;-)

@gz4589 4 года назад

I will answer myself, I've just seen the nmap manual and the --mtu is applied after the IP header. So, when you use 24 the TCP header (20 bytes long) was complete, but when you use 16 the TCP header was divided into a 16-byte chunk and a 4-byte one.

@MrGFYne1337357 4 года назад

#NotificationSquad

@hackileo 4 года назад

Thanks bro

@engrkhan6351 3 года назад

Please make a tutorial on ss7

@abusively9804 4 года назад

Which one is good c++ or python....I am a student and looking forward in cs field

@c1ph3rpunk 4 года назад

Depends on the school and the coursework, modern CS programs generally use Java, back when I took it we used C++. Real world, especially in security, we use Python a LOT though Go and Rust are both becoming popular.

@markychaz 3 года назад

Learn C and python

@JohnSmithM2C Год назад

he said we can find out which ip is a admin on a certain network using wireshock, how?

@faique2995 4 года назад

Please, Make a video on javascript.

@prakharmishra3000 4 года назад

I think it's hackersploit, not freecodecamp.

@prakharmishra3000 4 года назад

There's a good video on freecodecamp (3-4)hours, full course, no ads go watch it.

@JasonGomes140294 4 года назад

random decoy doesnt work for me. is anyone getting the same error?

@JasonGomes140294 4 года назад

according to nmap docs "Decoys do not work with version detection or TCP connect scan." i dunno how he was successful with the -sV command... i'm able to excute the command with out -sV cmd

@marshallwages5035 2 года назад

This is exactly what is so frustrating about trying to learn this stuff. Being a complete novice and just getting started. i find it difficult to understand the piont in spending so much time learning an outdated method of doing things. You say its so important but then in the same video say its basically obsolete. What is the beneficial takeaway of this?

@paultidwell8799 2 года назад

It's possible you still if it's part of your career you will run across old systems,

@cybersavage1337 2 года назад

@@paultidwell8799 the more and more people turn to the cloud. The less and less likely this is unfortunately.

@cnx8377 4 года назад

Bro need android AV evasion video clearly!!!

@alexxxk 3 года назад

if it doesnt work nowadays why to cover it ?

@sripadkarthik9081 4 года назад

Sec c

@hystef1388 4 года назад

Why do you use Linux?

@GOTHICforLIFE1 4 года назад

less resource intensive, open source, and Kali provides several pre-installed tools for vulnerability scanning, exploitation, etc.

@tophacker8365 4 года назад

@kirtansoni5915 4 года назад

Kali is not running properly in virtualbox

@rudranshtripathi01 4 года назад

images.offensive-security.com/virtual-images/kali-linux-2020.2a-vbox-amd64.ova

@stealph9665 4 года назад

Hello Bro Burpsuite “ full” tutorial gives please thanks bro

@stealph9665 4 года назад

Scorpion Hackers - Black Devil oki thank Bro

@princeemmy1826 4 года назад

Coda wilsono help record my lost account

@skylinecanvas 4 года назад

Just thought I’d let you know man. I tried to press the notification bell but it says I’m unable to because your channel is “for children” ? No idea how that happened but yeah ..