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dguido's profile
Dan Guido
Dan Guido
Dan Guido
@dguido

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Dan Guido

@dguido

CEO @trailofbits, organizer @EmpireHacking, director @hack_secure. Open DMs.

Brooklyn, NY
trailofbits.com
Joined April 2008

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    1. Dan Guido‏ @dguido 7 May 2016

      Lazytweet: Has anyone done a technical comparison between OpenVPN and IPSec/IKEv2? Eg., pros/cons of major protocol and implementation diffs

      6 replies 6 retweets 14 likes
    2. Dino A. Dai Zovi‏ @dinodaizovi 8 May 2016
      Replying to @dguido

      @dguido Use IKEv2 w/ Suite B algos (i.e. AES GCM) and key sizes. Disable short key lengths, some clients default to them for compat (iOS).

      1 reply 0 retweets 1 like
    3. Dino A. Dai Zovi‏ @dinodaizovi 8 May 2016
      Replying to @dinodaizovi

      @dguido TLS (used by OpenVPN) is overkill for use between trusted peers and enables attacks that are less risk elsewhere (i.e. heartbleed).

      2 replies 2 retweets 2 likes
    4. Dan Guido‏ @dguido 8 May 2016
      Replying to @dinodaizovi

      @dinodaizovi Oh, I've made my choice (and it agrees with yours I see)! I'm looking for more detailed info to back it up now.

      1 reply 0 retweets 0 likes
      Dan Guido‏ @dguido 8 May 2016

      @dinodaizovi AFAICT the one thing OpenVPN has on IPSec (by a mile) is ease of config and there is really something to be said for that.

      8:12 AM - 8 May 2016
      • 1 Retweet
      • 2 Likes
      • scriptjunkie dotrandomcode
      3 replies 1 retweet 2 likes
        1. New conversation
        2. the grugq‏ @thegrugq 8 May 2016
          Replying to @dguido

          @dguido @dinodaizovi I think @kennwhite did a big thing on IPSec config.

          1 reply 0 retweets 0 likes
        3. Kenn White‏Verified account @kennwhite 8 May 2016
          Replying to @thegrugq

          @thegrugq @dguido @dinodaizovi imo best config (for both) is Streisand: https://github.com/jlund/streisand  My pref is IPSec IKEv2 w/ GCM mode sans lt2p

          2 replies 6 retweets 17 likes
        4. Kenn White‏Verified account @kennwhite 8 May 2016
          Replying to @kennwhite

          @thegrugq @dguido @dinodaizovi and 99.999% of VPN services are steaming piles at best, fully surveilled at worst.

          2 replies 1 retweet 2 likes
        5. 1 more reply
        1. New conversation
        2. ██████████████████████████████████████████████████‏ @p_____o_____q 8 May 2016
          Replying to @dguido

          @dguido @dinodaizovi and working on top of layer4 helps alot too :p

          1 reply 0 retweets 0 likes
        3. Juliano Rizzo‏ @julianor 8 May 2016
          Replying to @p_____o_____q

          @suqdiq @dguido @dinodaizovi use SSH tunnels when it is enough ;)

          0 replies 0 retweets 1 like
        4. End of conversation
        1. New conversation
        2. Dino A. Dai Zovi‏ @dinodaizovi 8 May 2016
          Replying to @dguido

          @dguido My recs are pretty close to what I did when I set up the VPN years ago (IKEv1 instead of IKEv2) and it definitely wasn't trivial.

          1 reply 0 retweets 0 likes
        3. Dino A. Dai Zovi‏ @dinodaizovi 8 May 2016
          Replying to @dinodaizovi

          @dguido Setup ease can be a trap when defaults aren't secure. Better to go through pain once, mitigate risk, and facilitate use by others.

          0 replies 0 retweets 1 like
        4. End of conversation

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