// Ignore a missing signature for SMB < 3.0, as
                        // - the specification does not clearly require that (it does for SMB3+)
                        // - there seem to be server implementations (known: EMC Isilon) that do not sign the final
                        // response
                        if (negoResp.getSelectedDialect().atLeast(DialectVersion.SMB300) || response.isSigned()) {