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ArtGreg_340875's avatar
ArtGreg_340875
Icon for Nimbostratus rankNimbostratus
Nov 17, 2017

Users Getting Page Cannot be Displayed when Accessing a Server through F5

Hi,

 

For a longest time our set-up has been working with the below traffic flow.

 

User -> F5 -> Server Pool

 

Now the users are getting page "cannot be displayed" when accessing the said servers.

 

I've checked the logs and all I can see is this error Connection error: ssl_null_parse:3109: record length too large (22).

 

If we try to access the servers by passing F5 it works. What could be the issue here? Take note our F5 is software based meaning its in a VM.

 

Thanks in advance. Art

 

BIG-IP
cloud

3 Replies

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  • BB16's avatar
    BB16
    Icon for Nimbostratus rankNimbostratus
    Nov 17, 2017

    Hi Greg.

     

    1. Which SSL profile you are using check with certificate validity, check for cipher suite.
    2. Thru bypassing it works then there issue betweem f5->server.
    3. Is there any update done on server, f5 or VM.
    4. try telnet to server from f5 if session makes, theres some app issue @f5
    5. check VS config @ SSL & advanced level.
    6. you can check with packet capture.

    Let us know further.

     

  • Lee_Sutcliffe's avatar
    Lee_Sutcliffe
    Icon for Nacreous rankNacreous
    Nov 17, 2017

    Are you just using SSL between the client and F5:

     

    Client <-SSL-> F5 <-non-SSL-> Server

     

    Or, are you encrypting end to end?

     

    Client <-SSL-> F5 <-SSL-> Server

     

  • Gonzalex_330537's avatar
    Gonzalex_330537
    Icon for Cirrostratus rankCirrostratus
    Nov 17, 2017

    Please post your virtual server configuration. SSH to bigip and issue the following commands:

     

    tmsh list /ltm virtual list /ltm pool list /ltm node

     

    remove the sections that are not relevant and post here. thanks.