Strange Cpanel FTP messages

[keddie]

Looking through var/log/messages on one of my WHM VPSs, I am getting a lot of these:

Aug 16 01:42:24 server pure-ftpd: (?@127.0.0.1) [INFO] __cpanel__service__auth__ftpd__Fw4yuiFyVjG6Mseg5Bj_qLF4AYX6TFvA1SJvVRuYec2xk14CfAsu24YNe3D1sBVl is now logged in
Aug 16 01:42:25 server pure-ftpd: (__cpanel__service__auth__ftpd__Fw4yuiFyVjG6Mseg5Bj_qLF4AYX6TFvA1SJvVRuYec2xk14CfAsu24YNe3D1sBVl@127.0.0.1) [INFO] Logout.
Aug 16 01:47:14 server pure-ftpd: (?@127.0.0.1) [INFO] New connection from 127.0.0.1
Aug 16 01:47:25 server pure-ftpd: (?@127.0.0.1) [INFO] __cpanel__service__auth__ftpd__OGcOuPamJ7kJRPUNpvKIaePZN4Zh55K6g8X2D4XId_TQjVG44E2krcKyosrpcngt is now logged in
Aug 16 01:47:26 server pure-ftpd: (__cpanel__service__auth__ftpd__OGcOuPamJ7kJRPUNpvKIaePZN4Zh55K6g8X2D4XId_TQjVG44E2krcKyosrpcngt@127.0.0.1) [INFO] Logout.
Aug 16 01:52:16 server pure-ftpd: (?@127.0.0.1) [INFO] New connection from 127.0.0.1
Aug 16 01:52:27 server pure-ftpd: (?@127.0.0.1) [INFO] __cpanel__service__auth__ftpd__clLHiNDUY4RKHf_P09pD8Ldi93z1jpQJ8IVW70nHVgcuFvGIMJLTnd4EfB5RI6p8 is now logged in
Aug 16 01:52:27 server pure-ftpd: (__cpanel__service__auth__ftpd__clLHiNDUY4RKHf_P09pD8Ldi93z1jpQJ8IVW70nHVgcuFvGIMJLTnd4EfB5RI6p8@127.0.0.1) [INFO] Logout.
Aug 16 01:57:16 server pure-ftpd: (?@127.0.0.1) [INFO] New connection from 127.0.0.1
Aug 16 01:57:27 server pure-ftpd: (?@127.0.0.1) [INFO] __cpanel__service__auth__ftpd__rRVFPM5RYELkLtB2q2qLBmjoqBxsdEmaHlbvUoB4f5tfMq__cMXnzEfqUSrr14E0 is now logged in
Aug 16 01:57:27 server pure-ftpd: (__cpanel__service__auth__ftpd__rRVFPM5RYELkLtB2q2qLBmjoqBxsdEmaHlbvUoB4f5tfMq__cMXnzEfqUSrr14E0@127.0.0.1) [INFO] Logout.
Aug 16 02:02:17 server pure-ftpd: (?@127.0.0.1) [INFO] New connection from 127.0.0.1
Aug 16 02:02:28 server pure-ftpd: (?@127.0.0.1) [INFO] __cpanel__service__auth__ftpd__CMR3uGXOjlDqHKd5oatenyb6cVACguEi8E2DNvRdJerZ3wrglZYeqSbTGPf52l0I is now logged in
Aug 16 02:02:29 server pure-ftpd: (__cpanel__service__auth__ftpd__CMR3uGXOjlDqHKd5oatenyb6cVACguEi8E2DNvRdJerZ3wrglZYeqSbTGPf52l0I@127.0.0.1) [INFO] Logout.

Can anyone tell me what generates these messages and whether I should be concerned?

[cpanelkenneth]

__cpanel__service__auth__ftpd - that is chkservd performing a service check.