Error code 20 and 30 on rsync

Mon Apr 22 01:38:02 EST 2002

Hello,

I have installed rsync between several linux server and use rsync to backup
data on one of this, all is very good
working from the begin of this year, and now since the beginning of April,
all connectiongive the same error, the
synchronisation begin correctly and after some minutes error occurs, the
contain of the rsyncd.log is :

2002/04/22 08:50:49 [4248] reverse name lookup failed
2002/04/22 08:50:49 [4248] rsync to zen from unknown (213.221.129.85)
2002/04/22 09:01:36 [4248] transfer interrupted (code 30) at io.c(65)
2002/04/22 09:01:36 [4249] transfer interrupted (code 20) at main.c(663)
2002/04/22 09:12:13 [4516] reverse name lookup failed
2002/04/22 09:12:13 [4516] rsync to cfps from unknown (153.109.45.10)
2002/04/22 09:22:51 [4516] transfer interrupted (code 30) at io.c(65)
2002/04/22 09:22:51 [4537] transfer interrupted (code 20) at main.c(663)

any can help me please !!!!

many thanks

balet charles-henri