$ rsh coolnjmcl033 'ls -l /opt/cool/tools/lib/COOLvirtenv'
ls: cannot access /opt/cool/tools/lib/COOLvirtenv: Permission denied

[root@coolnjmcl033 etc]# ls -l /opt/cool/tools/lib/COOLvirtenv
-rwxr-xr-x. 1 cool cool 29852 Jul 22 03:16 /opt/cool/tools/lib/COOLvirtenv

According to,

From "info ls":

      Following the file mode bits is a single character that specifies
     whether an alternate access method such as an access control list
     applies to the file.  When the character following the file mode
     bits is a space, there is no alternate access method.  When it is
     a printing character, then there is such a method.

     GNU `ls' uses a `.' character to indicate a file with an SELinux
     security context, but no other alternate access method.

     A file with any other combination of alternate access methods is
     marked with a `+' character.

In order to make files located on one server can be accessied by other servers, SELinux should be disabled. In order to disable SELinux,  refer to How to Disable SELinux.