Remote Connection to Server

We have to ESB servers “ENT_IS_01” and “ENT_IS_02” in Cluster. Getting the below message. Not able to figure out the reason for the same.

[1773]2014-11-25 13:35:33 EST [ISP.0061.0003I] Established new remote connection to ENT_IS_02 for user mwssystemuser
[1772]2014-11-25 13:35:33 EST [ISP.0061.0003I] Established new remote connection to ENT_IS_01 for user mwssystemuser