LiquidVPN improves modulating IP speeds, making innovative service more attractive

Douglas Crawford

Douglas Crawford

December 16, 2013

When we first reviewed US provider LiquidVPN a couple of months back we were very impressed with its innovative (and arguably revolutionary) ‘modulating IP’ system, which continually changes (‘modulates’) your IP address to provide increased anonymity when using the internet.

Although the technology worked very well in terms of successfully giving us a new IP address every few seconds, we found the resultant speed hit was unacceptable – it was just too slow. Well, the LiquidVPN team has been hard at work refining and ironing out problems with this exciting new technology and, now that we have put the service through its paces again, we are pleased to say speeds have vastly improved.

Part of the problem apparently was that we tested using the closest modulating IP servers to us here in the UK. Located in the Czech Republic, these servers proved too slow, so LiquidVPN has moved to faster servers in Romania. The other issue was that ‘TLS security keys will slow down transmission speeds quite a bit’, so it is strongly recommend that users choose a UDP connection. LiquidVPN has however left the option of TLS available, ‘for the few users who want to use it.’

 The Results

All tests performed using our 20Mb/s UK broadband connection.

Our control test, with no VPN

Connected to Romania TCP server using modulating IPs. LiquidVPN recommends avoiding TCP, but this result is still a big improvement over our review results

Connected to Romania UDP server using modulating IPs. This is much better, and makes the modulating IP service usable, although the speed hit is still substantial

A control test: connected to the same Romania server with no VPN. Clearly distance is a minimal factor in the above results

Although much further away from us, connecting to the Kansas (UDP) server using modulation IPs was actually a bit  faster than connecting to Romania…

… Connected to the same Kansa server without VPN (control)

In order to obtain more ‘real use’ results, we used the diagnostic software available from to test FTP download speeds.

ftp without
Without VPN

ftp ro
When connected using modulating IPs to UPP Romania server (3899.1kbs = 3.81Mb/s)

ftp sw
When connected using modulating IPs to UPP Kansas server. On this test the extra distance between us and the server appears to tell


We really like the modulating IP technology, and now that LiquidVPN has greatly improved performance we find it a much more attractive proposition, and although users will still suffer a noticeable speed hit (we were especially disappointed with the FTP download results), the trade-off with the improved anonymity it affords may well be worth the inconvenience.

It would be nice to see speeds closer to our full bandwidth (especially for the Romania servers), but we applaud LiquidVPN for the strides it has made towards making this a useful and usable privacy enhancing technology.

We also think that a word of praise is due for LiquidVPN’s move away from NIST certified encryption standards. We have discussed this in more detail in this article, but LiquidVPN informs us that in addition to its Russia server, Camellia encryption has also now been rolled out for Germany, ‘with more to follow.’

Bravo! As ever, we look forward to seeing what LiquidVPN gets up to next.

Douglas Crawford

I am a freelance writer, technology enthusiast, and lover of life who enjoys spinning words and sharing knowledge for a living. You can now follow me on Twitter - @douglasjcrawf.

3 responses to “LiquidVPN improves modulating IP speeds, making innovative service more attractive

  1. I signed up for 1 month in June. So far it has saved me from at least 4 DMCA notices. I like the fact that they publish them. I signed up for their IPS system. It was hard to tell if it was working or not so I decided to run some tests. I setup a server on one of their public IP connections and then attempted to exploit it, DDoS it, send infected files to it and so on. It works but its a bit different then I had expected. I expected something like an antivirus at the network level but it let the viruses and malware get through. What it did do is block me from exploiting the server with shellcodes, and stopped the DoS attacks I tested. I attempted to test some client side attacks to simulate a virus or trojans payload and it was able to stop these attacks as well.

    On a side note towards the end of my testing when I was testing client side attacks I got an email from one of their support reps suggesting I run Malwarebytes. I knew my activities would be noticed because I was not on a shared or modulating IP when I tested so your milage may vary but in my case it was nice for them to try and warn me about a possible malware infection trying to take over my device.

    If you are a gamer like me that hates being booted by a kid hitting the DDoS button the IPS enhancement could be a good fit.

  2. I’ve been using LiquidVPN for one month now and can’t complain.
    Online gaming works fine, no connection losses, stable ping, downloads at full-speed, I even noticed a subtle boost of my speed (used the server in Frankfurt and NY).
    Customer service is friendly, replying within some hours (I’m living 7 hours ahead of USA) and is able to help me with my problems.
    The only thing I still don’t really “feel” in sense of working is their LiquidIPS (Intrusion Prevention Service). I subscribed to it as well but… yeah.. I don’t know if it’s really working or not. It costs 3$ extra. I can’t say if it’s worth it or not..
    So far, really sweet VPN service.

  3. I joined over from HMA, i went straight back, support is responsive but there service sucks I’m afraid, constant disconnections and auth failures here from the UK after every few login attempts, just not worth the hassle for me. I heard PIA and TorGuard where awesome, will try those instead.

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