ATP800 - SSL VPN is slow

Antoine_Richez
Antoine_Richez Posts: 2  Freshman Member
Friend Collector Third Anniversary
in Security
Hey everyone,

I did the setup of a SSL VPN on our new ATP800 (setup was super fast and straightforward). The problem we're facing now is that we suffer from a really slow speed through the VPN.

We have a 500D/100U Mbps on site.

Through the VPN we barely have 600KB/s.

I tried to look on the net to search for a magic option hidden somewhere but didn't  really find anything yet.

I thank you all in advance.

Best regards,

Accepted Solution

  • Zyxel_Charlie
    Zyxel_Charlie Posts: 1,034  Zyxel Employee
    50 Answers 500 Comments Friend Collector Fourth Anniversary
    edited June 2021 Answer ✓
    @Antoine_Richez

    As current design, SSL VPN will have an disadvantage(in compare with L2TP) when it comes to throughput. It could be limited to 10-20Mbps. 

    Also, RDP uses a lot of it's bandwidth for screen data and instruction transfer. It's not exactly designed as a file transfer protocol. 

    To get the better performance, you could establish the L2TP with FTP download or use teamviewer as remote tool for downloading.

All Replies

  • Zyxel_Charlie
    Zyxel_Charlie Posts: 1,034  Zyxel Employee
    50 Answers 500 Comments Friend Collector Fourth Anniversary
    @Antoine_Richez
    Can I know what is the way you got the VPN performance, SMB, FTP or Http?
    I would like to establish the SSL VPN from my side, therefore can you private message the remote information to me?
  • Antoine_Richez
    Antoine_Richez Posts: 2  Freshman Member
    Friend Collector Third Anniversary
    @Zyxel_Charlie
    I've sent you a message with the corresponding informations.

    Have a nice day.
  • Zyxel_Charlie
    Zyxel_Charlie Posts: 1,034  Zyxel Employee
    50 Answers 500 Comments Friend Collector Fourth Anniversary
    @Antoine_Richez
    Thanks for your information.
    If possible, I would like to know the RDP information of this scenario for check further.

  • Mario
    Mario Posts: 106  Ally Member
    Zyxel Certified Network Engineer Level 1 - Security First Comment Friend Collector Fifth Anniversary
    Did you get an solution? Please keep us also up to date.
    I think it's a generic problem, the speed of the SSL VPN is bad.
    See in the Ideas section, and please upvote the Wirequrard request.
    Mario

  • Zyxel_Charlie
    Zyxel_Charlie Posts: 1,034  Zyxel Employee
    50 Answers 500 Comments Friend Collector Fourth Anniversary
    edited June 2021 Answer ✓
    @Antoine_Richez

    As current design, SSL VPN will have an disadvantage(in compare with L2TP) when it comes to throughput. It could be limited to 10-20Mbps. 

    Also, RDP uses a lot of it's bandwidth for screen data and instruction transfer. It's not exactly designed as a file transfer protocol. 

    To get the better performance, you could establish the L2TP with FTP download or use teamviewer as remote tool for downloading.

  • Mario
    Mario Posts: 106  Ally Member
    Zyxel Certified Network Engineer Level 1 - Security First Comment Friend Collector Fifth Anniversary
    >As current design, SSL VPN will have an disadvantage(in compare with L2TP) when it comes to >throughput. It could be limited to 10-20Mbp
    Is it on the roadmap to fix this design issue?
    Openvpn or Wireguadr are known solutions to solve such problems ;)




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