The following errata are now on ftp.scientificlinux.org in

ftp://ftp.scientificlinux.org/linux/scientific/301/i386/errata/SL/RPMS/

    sox-devel-12.17.4-4.3.i386.rpm
    sox-12.17.4-4.3.i386.rpm
    ipsec-tools-0.2.5-0.5.i386.rpm

-Connie Sieh