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kazeem_yusuf1's avatar
kazeem_yusuf1
Icon for Nimbostratus rankNimbostratus
Jul 06, 2018

Recurrent Curl to a Virtual Server Fails on the Same Subnet

On my network, recurrent curl tests to a virtual server (10.184.1.12) only fail when the source ip is on the same subnet. (eg,10.184.1.78)   When recurrent curl tests are performed from any other ...
application delivery
BIG-IP
big-ip ltm
curl
http
https
LTM
eben_259100's avatar
eben_259100
Icon for Cirrostratus rankCirrostratus
Jul 06, 2018

Hi Kazeem,

 

It could be that the backend servers are trying to respond directly to the user that initiated the curl instead of F5. If this is the case, the user RST the connection. Do you have SNAT in place?

 

  • kazeem_yusuf1's avatar
    kazeem_yusuf1
    Icon for Nimbostratus rankNimbostratus
    Jul 07, 2018

    HI,EBEN,SNAT is in place.

     

    However,I have a one-armed mode scenario.

     

    The virtual server,back-end servers and snatch pools are all in the same subnet (10.184.1.x)

     

  • boneyard's avatar
    boneyard
    Icon for MVP rankMVP
    Jul 08, 2018

    packet captures will probably help a lot, one on the big-ip to see where traffic halts and one on the server to see what happens there.

     

  • eben_259100's avatar
    eben_259100
    Icon for Cirrostratus rankCirrostratus
    Jul 09, 2018

    In addition, share the output of "tmsh list ltm virtual "