Index: openacs-4/packages/acs-tcl/tcl/security-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-tcl/tcl/security-procs.tcl,v
diff -u -r1.129 -r1.130
--- openacs-4/packages/acs-tcl/tcl/security-procs.tcl	26 Nov 2024 08:18:55 -0000	1.129
+++ openacs-4/packages/acs-tcl/tcl/security-procs.tcl	13 Dec 2024 09:53:39 -0000	1.130
@@ -3066,7 +3066,13 @@
         # $hostName and checks the properties of the first IP address
         # returned.
         #
-        set validationOk [expr {![ns_ip public [ns_addrbyhost $host]]}]
+        try {
+            ns_addrbyhost $host
+        } on ok {result} {
+            set validationOk [expr {![ns_ip public $result]}]
+        } on error {errorMsg} {
+            ad_log warning "provided value in host header field '$host' could not be resolved"
+        }
     }
 
     return 0