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Mahantesh_Bisur's avatar
Mahantesh_Bisur
Icon for Nimbostratus rankNimbostratus
Dec 14, 2015

VIP Slow response time

Hi,   We have created 2 VIP's for sftp services and when both of these VIP's are added on monitoring server, We are getting different response time for both of these VIP's.   One VIP is taking ...
application delivery
LTM
Stanislas_Piro2's avatar
Stanislas_Piro2
Icon for Cumulonimbus rankCumulonimbus
Dec 14, 2015

Hi,

 

sftp is provided by SSH deamon which do a reverse dns lookup of the client IP.

 

if there is no dns PTR for the F5 self IP used by SNAT, the SSH service will wait for DNS timeout before requesting authentication password.

 

it is not a F5 issue but the default behavior of every SSH services.