Index: /trunk/src/VBox/Frontends/VirtualBox/src/widgets/UIPortForwardingTable.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/widgets/UIPortForwardingTable.cpp	(revision 58744)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/widgets/UIPortForwardingTable.cpp	(revision 58745)
@@ -723,15 +723,19 @@
         const IpData guestIp = m_pModel->data(m_pModel->index(i, UIPortForwardingModel::UIPortForwardingDataType_GuestIp), Qt::EditRole).value<IpData>();
 
-        /* If at aleast one port is 'zero': */
+        /* If at least one port is 'zero': */
         if (hostPort.value() == 0 || guestPort.value() == 0)
             return msgCenter().warnAboutIncorrectPort(window());
-        /* If at aleast one address is incorrect: */
+        /* If at least one address is incorrect: */
         if (!hostIp.trimmed().isEmpty() &&
-            (   !RTNetIsIPv4AddrStr(hostIp.toAscii().constData())
-             || RTNetStrIsIPv4AddrAny(hostIp.toAscii().constData())))
+            (   (   !RTNetIsIPv4AddrStr(hostIp.toAscii().constData())
+                 && !RTNetIsIPv6AddrStr(hostIp.toAscii().constData()))
+             || RTNetStrIsIPv4AddrAny(hostIp.toAscii().constData())
+             || RTNetStrIsIPv6AddrAny(hostIp.toAscii().constData())))
             return msgCenter().warnAboutIncorrectAddress(window());
         if (!guestIp.trimmed().isEmpty() &&
-            (   !RTNetIsIPv4AddrStr(guestIp.toAscii().constData())
-             || RTNetStrIsIPv4AddrAny(guestIp.toAscii().constData())))
+            (   (   !RTNetIsIPv4AddrStr(guestIp.toAscii().constData())
+                 && !RTNetIsIPv6AddrStr(guestIp.toAscii().constData()))
+             || RTNetStrIsIPv4AddrAny(guestIp.toAscii().constData())
+             || RTNetStrIsIPv6AddrAny(guestIp.toAscii().constData())))
             return msgCenter().warnAboutIncorrectAddress(window());
         /* If empty guest address is not allowed: */