The manual says: "Forwarding host ports < 1024 impossible: On Unix-based hosts (e.g. Linux, Solaris, Mac OS X) it is not possible to bind to ports below 1024 from applications that are not run by root".
Is it possible to disable this limitation? I run main internet services (such as mail server, for example (SMTP, IMAP, LDAP, HTTP, HTTPS), as VBoxHeadless machines and capture host's ports by VBoxManage modifyvm --natpf1). The only solution I can see now is capturing a higher port and redirecting traffic meant for a lower port by means of iptables or redir. But maybe there is more natural solution?