NAT open failed???

I am using FreeBSD 3.1, kernel file param.c changed to make 32768 free
file descriptors and squid 2.2 stable3 with the patches from nlanr

I see these log messages in the cache log file
what does these mean?

1999/07/05 18:10:59| parseHttpRequest: : (13) Permission denied
1999/07/05 18:10:59| clientReadRequest: FD 153 Invalid Request
1999/07/05 18:11:03| parseHttpRequest: NAT open failed: (13) Permission
denied
1999/07/05 18:11:03| clientReadRequest: FD 66 Invalid Request
1999/07/05 18:13:17| parseHttpRequest: NAT open failed: (13) Permission
denied
1999/07/05 18:13:17| clientReadRequest: FD 47 Invalid Request
1999/07/05 18:17:17| parseHttpRequest: NAT open failed: (13) Permission
denied
1999/07/05 18:17:17| clientReadRequest: FD 59 Invalid Request
1999/07/05 18:22:26| parseHttpRequest: NAT open failed: (13) Permission
denied
1999/07/05 18:22:26| clientReadRequest: FD 19 Invalid Request

thanks
Evren Yurtesen
Received on Mon Jul 05 1999 - 09:09:24 MDT