public boolean isSigningNegotiated () {
        return ( this.negotiatedFlags2 & SmbConstants.FLAGS2_SECURITY_SIGNATURES ) == SmbConstants.FLAGS2_SECURITY_SIGNATURES;
    }


    @Override
    public boolean isValid ( CIFSContext ctx, SmbNegotiationRequest req ) {
        if ( getDialectIndex() > 10 ) {
            return false;
        }