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Hak5 1108 – Hak5 Special: Proxies – Part 1

21 Comments

  • bigbeck89
    Reply

    Great Episode! Loved having Snubs asking all those questions, they were exactly the questions floating around in my head!

    Excited to see this Proxies series move forward.

  • Fredrik
    Reply

    Thumbs up for this “new” kind of episode. I was actually just surfing around thinking about browser security and this will be really helpfull.

    Keep up the good work!
    Sweden

  • Adam
    Reply

    Would proxies be a possible work around for accessing local resources while connected to a corporate VPN?

    I have heard this complaint from many people, that whenever they want to print or access a file on their local network they have to disconnect from VPN and use that resource, then reconnect.

    Thanks for the great show!

    Adam

  • Dreadfrost
    Reply

    Missed one point that I find useful from a holistic pov, proxies and NAT and essentially one in the same. OSI is the general and useful 7 layered design of encapsulation and should be the basis and descriptor of all network technologies.

    NAT or Network Address Translation is essentially the replacement of layer 1-4, physical, data link, network, and transport. Proxies do the exact same however depending on software they may record the information, relay it, replace the NAT portions dynamically and such. Same goes for IDS’s, web publishing servers, and all intermediate devices.

    Even your pineapple is the same concept. I think you got something for flipping images in HTTP traffic right. Well now your reading layer 1-7 and altering 6, and 7. Its just more processing of packets.

    The concept and OSI is golden and very underrated. The IT world is flooded with terminology and categorization and process. This is flawed. Please try and incorporate OSI into the show more often. You and intrinsically understand this but for myself is what the holy grail to my understanding of these network technologies.

    • TuffRank
      Reply

      m8! you are well-off with your OSI understanding /concept … first thing first;

      Quote; “proxies and NAT and essentially one in the same” that is incorrect… Go back to your study guides or your youtube vids & refresh your Knowledge r follow on…

      However, I do agree with you with using the OSI and TCP/IP layer Blueprint for explaining how Internetworking Works…

      Think about NAT & Proxy this way.

      Do not confuse a proxy server with a NAT (Network Address Translation) device. A proxy server connects to, responds to, and receives traffic from the Internet, acting on behalf of the client computer, while a NAT device transparently changes the origination address of traffic coming through it before passing it to the Internet…

      OSI concept;

      For those who understand the OSI (Open System Interconnection) model of networking, the technical difference between a proxy and a NAT is that the proxy server works on the transport layer (layer 4) or higher of the OSI model, whereas a NAT works on the network layer (layer 3).

      Oh yeah!!

      >> SOCKS performs at Layer 5 of the OSI model—the session layer (an intermediate layer between the presentation layer and the transport layer).

      Great work Mr. Kitchen and pretty girl Shannon… Give-Thx

  • tomscrat
    Reply

    Hello,
    I am a great fan of hak5 and watching the video of the show each week from Germany ;D

    I tried out the ssh proxy thing and found a surprising fact:

    I did “ssh -D 8080 user@host” to a ssh server of mine, opened chrome and installed Switchy as Shannon explained. Works fine!
    Then I changed to Firefox, and when I go here to http://www.whatismyip.com I see the same as in Chrome with Switchy and proxy use enabled …
    Hmm, I thought, then I figured out Firefox provides the options “Use system proxy settings”, which automatically uses the setup ssh tunnel. So no need to change with Foxyproxy the use of a proxy.
    Find the setting in Firefox > Edit > Preferences > Advanced > Network > Connection > Settings
    That is the normal way to provide proxy information, but with set on “use system proxy settings” no need to change anything 😀

    I am looking forward for to the next episode of Hak5,
    cheers form Germany ;D

  • Pixelated Dwarf
    Reply

    Outstanding! Love the in depth look at proxies. Hope you will also be getting into VPN’s.

    Short correction – it is IP v6 not 5 🙂 65,535 for the number of ports.

    Keep up the great work – looking forward to future parts of this!

    Remember

    Spaces_Are_Evil

  • Noob
    Reply

    Great episode! I’ve been struggling with proxies for a long time (out of need and desire to learn). I can’t wait for the next episodes. I’m hoping for some techniques to maintain anonymity, and safe guard a particular email account that’s been compromised by a vicious hacker.

  • Mario
    Reply

    Great Episode, wish i knew about this show from when it started!
    Iv managed to stay up to date with all the latest episodes.

    All the way from South Africa

    Thank you guys!!

  • signal7
    Reply

    That was a very Interesting presentation on using proxies and I must
    admit, I learned a few things along the way. However, some packet
    captures of the session using a dynamic port shows that all of the DNS
    requests still go to the locally defined DNS server. So, even though
    the information itself is tunneled and encrypted, *where* you’re going
    online is not protected. It would be trivial to defeat this proxy
    with a filtering DNS provider or even a firewall that can do deep
    enough packet inspection. At the very least, your provider could log
    the DNS queries for later use, whatever that may be.

  • Slickkk
    Reply

    I guess the tools that are out are coming out are being developed slower than your episodes. They used to be way longer and better; must be running out of material. And btw Darrin you screwed up big time with not being with that chick, you must take a lot of showers lol.

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    Hi hak5 crew

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  • Kincaid
    Reply

    Howdy,

    I am excited about starting to use proxies. So since we don’t know if the free proxy servers out there are logging the traffic for their evil purposes and if we go with the same line of thought that vps could in theory also log your info, I was wondering if i could run my own proxy server at home.

    Then the question becomes, if i am at my favorite wifi location and I connect to my proxy at home so i can safely check my 2 emails i get a week, connecting to the proxy server would give the “man in black” the ip address of my home proxy server and they can start doing the evil things they do.

    I am guessing there is no way around this?

    • Darren Kitchen
      Reply

      Sure you can run a proxy server at home. We actually cover setting these up in both Windows and Linux over the next two episodes. If there was a MITM at the coffee shop you would indeed be giving up the IP of your home server. Also keep in mind what you’re doing here is shifting the trust from the open WiFi network (low trust IMHO) to your home or VPS. Sure your VPS provider could be sniffing, but then again so can your ISP so at the end of the day you just have to ask yourself, who do you trust?

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    all who want to Learn Security(also other) from BASIC —–> ADVANCE…

    I really Like it ….. and mostly “GO THROUGH IT”
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