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-rw-r--r--plugins/check_nt.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/plugins/check_nt.c b/plugins/check_nt.c
index 2505a0bc..e90cd578 100644
--- a/plugins/check_nt.c
+++ b/plugins/check_nt.c
@@ -686,7 +686,11 @@ void print_help(void)
printf (_("Notes:\n\
- The NSClient service should be running on the server to get any information\n\
(http://nsclient.ready2run.nl).\n\
- - Critical thresholds should be lower than warning thresholds\n"));
+ - Critical thresholds should be lower than warning thresholds\n\
+ - Default port 1248 is sometimes in use by other services. The error \n\
+ output when this happens contains \"Cannot map xxxxx to protocol number\". \n\
+ One fix for this is to change the port to something else on check_nt \n\
+ and on the client service it\'s connecting to. \n"));
}