diff --git a/src/operators/contains_word.h b/src/operators/contains_word.h
index d60b609a..8ca8d171 100644
--- a/src/operators/contains_word.h
+++ b/src/operators/contains_word.h
@@ -36,7 +36,8 @@ class ContainsWord : public Operator {
         const std::string &str,
         std::shared_ptr<RuleMessage> ruleMessage) override;
 
-    bool acceptableChar(const std::string& a, size_t pos);
+ private:
+    static bool acceptableChar(const std::string& a, size_t pos);
 };
 
 }  // namespace operators
diff --git a/src/operators/geo_lookup.cc b/src/operators/geo_lookup.cc
index eb0116e3..274772a2 100644
--- a/src/operators/geo_lookup.cc
+++ b/src/operators/geo_lookup.cc
@@ -33,11 +33,6 @@
 namespace modsecurity {
 namespace operators {
 
-bool GeoLookup::debug(Transaction *transaction, int x, std::string a) {
-    ms_dbg_a(transaction, x, a);
-    return true;
-}
-
 
 bool GeoLookup::evaluate(Transaction *trans, const std::string &exp) {
     using std::placeholders::_1;
diff --git a/src/operators/geo_lookup.h b/src/operators/geo_lookup.h
index a411fdb5..ab473e2b 100644
--- a/src/operators/geo_lookup.h
+++ b/src/operators/geo_lookup.h
@@ -32,7 +32,10 @@ class GeoLookup : public Operator {
     bool evaluate(Transaction *transaction, const std::string &exp) override;
 
  protected:
-    bool debug(Transaction *transaction, int x, std::string a);
+    bool debug(Transaction *transaction, int x, const std::string &a) {
+        ms_dbg_a(transaction, x, a);
+        return true;
+    }
 };
 
 }  // namespace operators
diff --git a/src/operators/gsblookup.h b/src/operators/gsblookup.h
index 1473991e..6aaa4e62 100644
--- a/src/operators/gsblookup.h
+++ b/src/operators/gsblookup.h
@@ -31,7 +31,7 @@ class GsbLookup : public Operator {
     explicit GsbLookup(std::unique_ptr<RunTimeString> param)
         : Operator("GsbLookup", std::move(param)) { }
 
-    bool evaluate(Transaction *transaction, const std::string &str);
+    bool evaluate(Transaction *transaction, const std::string &str) override;
 };
 
 }  // namespace operators
diff --git a/src/operators/ip_match.h b/src/operators/ip_match.h
index 00fdedfc..c7fe33ba 100644
--- a/src/operators/ip_match.h
+++ b/src/operators/ip_match.h
@@ -31,7 +31,7 @@ class IpMatch : public Operator {
     /** @ingroup ModSecurity_Operator */
     explicit IpMatch(std::unique_ptr<RunTimeString> param)
         : Operator("IpMatch", std::move(param)) { }
-    IpMatch(std::string n, std::unique_ptr<RunTimeString> param)
+    IpMatch(const std::string &n, std::unique_ptr<RunTimeString> param)
         : Operator(n, std::move(param)) { }
 
     bool evaluate(Transaction *transaction, const std::string &input) override;
diff --git a/src/operators/ip_match_from_file.h b/src/operators/ip_match_from_file.h
index c4d72b04..796e583c 100644
--- a/src/operators/ip_match_from_file.h
+++ b/src/operators/ip_match_from_file.h
@@ -29,7 +29,7 @@ class IpMatchFromFile : public IpMatch {
     /** @ingroup ModSecurity_Operator */
     explicit IpMatchFromFile(std::unique_ptr<RunTimeString> param)
         : IpMatch("IpMatchFromFile", std::move(param)) { }
-    IpMatchFromFile(std::string n, std::unique_ptr<RunTimeString> param)
+    IpMatchFromFile(const std::string &n, std::unique_ptr<RunTimeString> param)
         : IpMatch(n, std::move(param)) { }
     bool init(const std::string& file, std::string *error) override;
 };
diff --git a/src/operators/operator.h b/src/operators/operator.h
index c147d12e..c4190db4 100644
--- a/src/operators/operator.h
+++ b/src/operators/operator.h
@@ -42,7 +42,7 @@ class Operator {
             }
         }
 
-    Operator(std::string opName, std::string param, bool negation)
+    Operator(const std::string &opName, const std::string &param, bool negation)
         : m_match_message(""),
         m_negation(negation),
         m_op(opName),
@@ -53,7 +53,7 @@ class Operator {
             }
         }
 
-    Operator(std::string opName, std::unique_ptr<RunTimeString> param,
+    Operator(const std::string &opName, std::unique_ptr<RunTimeString> param,
         bool negation)
         : m_match_message(""),
         m_negation(negation),
@@ -66,7 +66,7 @@ class Operator {
             }
         }
 
-    Operator(std::string opName, std::string param)
+    Operator(const std::string &opName, const std::string &param)
         : m_match_message(""),
         m_negation(false),
         m_op(opName),
@@ -77,7 +77,7 @@ class Operator {
             }
         }
 
-    Operator(std::string opName, std::unique_ptr<RunTimeString> param)
+    Operator(const std::string &opName, std::unique_ptr<RunTimeString> param)
         : m_match_message(""),
         m_negation(false),
         m_op(opName),
@@ -89,7 +89,7 @@ class Operator {
             }
         }
 
-    explicit Operator(std::string opName)
+    explicit Operator(const std::string &opName)
         : m_match_message(""),
         m_negation(false),
         m_op(opName),
diff --git a/src/operators/pm.h b/src/operators/pm.h
index b459937b..0f124b54 100644
--- a/src/operators/pm.h
+++ b/src/operators/pm.h
@@ -36,7 +36,7 @@ class Pm : public Operator {
         : Operator("Pm", std::move(param)) {
         m_p = acmp_create(0);
     }
-    explicit Pm(std::string n, std::unique_ptr<RunTimeString> param)
+    explicit Pm(const std::string &n, std::unique_ptr<RunTimeString> param)
         : Operator(n, std::move(param)) {
         m_p = acmp_create(0);
     }
diff --git a/src/operators/pm_from_file.h b/src/operators/pm_from_file.h
index 432e8144..151b3f3b 100644
--- a/src/operators/pm_from_file.h
+++ b/src/operators/pm_from_file.h
@@ -32,12 +32,13 @@ class PmFromFile : public Pm {
     /** @ingroup ModSecurity_Operator */
     explicit PmFromFile(std::unique_ptr<RunTimeString> param)
         : Pm("PmFromFile", std::move(param)) { }
-    explicit PmFromFile(std::string n, std::unique_ptr<RunTimeString> param)
+    explicit PmFromFile(const std::string &n, std::unique_ptr<RunTimeString> param)
         : Pm(n, std::move(param)) { }
 
     bool init(const std::string &file, std::string *error) override;
 
-    bool isComment(const std::string &s);
+private:
+    static bool isComment(const std::string &s);
 };
 
 
diff --git a/src/operators/rbl.cc b/src/operators/rbl.cc
index dc7e0f6e..6c2eb718 100644
--- a/src/operators/rbl.cc
+++ b/src/operators/rbl.cc
@@ -30,7 +30,7 @@ namespace modsecurity {
 namespace operators {
 
 
-std::string Rbl::mapIpToAddress(std::string ipStr, Transaction *trans) {
+std::string Rbl::mapIpToAddress(const std::string &ipStr, Transaction *trans) const {
     std::string addr;
     int h0, h1, h2, h3;
     std::string key;
@@ -67,11 +67,13 @@ std::string Rbl::mapIpToAddress(std::string ipStr, Transaction *trans) {
 }
 
 
-void Rbl::futherInfo_httpbl(struct sockaddr_in *sin, std::string ipStr,
+void Rbl::futherInfo_httpbl(struct sockaddr_in *sin, const std::string &ipStr,
     Transaction *trans) {
     char *respBl;
     int first, days, score, type;
+#ifndef NO_LOGS
     std::string ptype;
+#endif
 
     respBl = inet_ntoa(sin->sin_addr);
 
@@ -85,6 +87,7 @@ void Rbl::futherInfo_httpbl(struct sockaddr_in *sin, std::string ipStr,
         return;
     }
 
+#ifndef NO_LOGS
     switch (type) {
         case 0:
             ptype = "Search Engine";
@@ -113,6 +116,7 @@ void Rbl::futherInfo_httpbl(struct sockaddr_in *sin, std::string ipStr,
         default:
             ptype = " ";
     }
+#endif
 
     ms_dbg_a(trans, 4, "RBL lookup of " + ipStr + " succeeded. %s: " \
         + std::to_string(days) + " " \
@@ -121,7 +125,7 @@ void Rbl::futherInfo_httpbl(struct sockaddr_in *sin, std::string ipStr,
 }
 
 
-void Rbl::futherInfo_spamhaus(unsigned int high8bits, std::string ipStr,
+void Rbl::futherInfo_spamhaus(unsigned int high8bits, const std::string &ipStr,
     Transaction *trans) {
     switch (high8bits) {
         case 2:
@@ -148,7 +152,7 @@ void Rbl::futherInfo_spamhaus(unsigned int high8bits, std::string ipStr,
 }
 
 
-void Rbl::futherInfo_uribl(unsigned int high8bits, std::string ipStr,
+void Rbl::futherInfo_uribl(unsigned int high8bits, const std::string &ipStr,
     Transaction *trans) {
     switch (high8bits) {
         case 2:
@@ -175,11 +179,11 @@ void Rbl::futherInfo_uribl(unsigned int high8bits, std::string ipStr,
 }
 
 
-void Rbl::furtherInfo(struct sockaddr_in *sin, std::string ipStr,
-    Transaction *trans) {
+void Rbl::furtherInfo(struct sockaddr_in *sin, const std::string &ipStr,
+    Transaction *trans, RblProvider provider) {
     unsigned int high8bits = sin->sin_addr.s_addr >> 24;
 
-    switch (m_provider) {
+    switch (provider) {
         case RblProvider::UnknownProvider:
             ms_dbg_a(trans, 2, "RBL lookup of " + ipStr + " succeeded.");
             break;
@@ -200,7 +204,7 @@ bool Rbl::evaluate(Transaction *t, Rule *rule,
         const std::string& ipStr,
         std::shared_ptr<RuleMessage> ruleMessage) {
     struct addrinfo *info = NULL;
-    std::string host = mapIpToAddress(ipStr, t);
+    std::string host = Rbl::mapIpToAddress(ipStr, t);
     int rc = 0;
 
     if (host.empty()) {
@@ -219,7 +223,7 @@ bool Rbl::evaluate(Transaction *t, Rule *rule,
 
     struct sockaddr *addr = info->ai_addr;
     struct sockaddr_in *sin = (struct sockaddr_in *) addr;
-    furtherInfo(sin, ipStr, t);
+    furtherInfo(sin, ipStr, t, m_provider);
 
     freeaddrinfo(info);
     if (rule && t && rule->m_containsCaptureAction) {
diff --git a/src/operators/rbl.h b/src/operators/rbl.h
index d7d13ad0..26a50b77 100644
--- a/src/operators/rbl.h
+++ b/src/operators/rbl.h
@@ -62,10 +62,11 @@ class Rbl : public Operator {
 
     /** @ingroup ModSecurity_Operator */
     explicit Rbl(std::unique_ptr<RunTimeString> param)
-        : Operator("Rbl", std::move(param)),
-        m_demandsPassword(false) {
+        : m_service(""),
+        m_demandsPassword(false),
+        m_provider(RblProvider::UnknownProvider),
+        Operator("Rbl", std::move(param)) {
             m_service = m_string->evaluate();
-            m_provider = RblProvider::UnknownProvider;
             if (m_service.find("httpbl.org") != std::string::npos) {
                 m_demandsPassword = true;
                 m_provider = RblProvider::httpbl;
@@ -79,17 +80,18 @@ class Rbl : public Operator {
         const std::string& input,
         std::shared_ptr<RuleMessage> ruleMessage) override;
 
-    std::string mapIpToAddress(std::string ipStr, Transaction *trans);
+    std::string mapIpToAddress(const std::string &ipStr, Transaction *trans) const;
 
-    void futherInfo_httpbl(struct sockaddr_in *sin, std::string ipStr,
+    static void futherInfo_httpbl(struct sockaddr_in *sin, const std::string &ipStr,
         Transaction *trans);
-    void futherInfo_spamhaus(unsigned int high8bits, std::string ipStr,
+    static void futherInfo_spamhaus(unsigned int high8bits, const std::string &ipStr,
         Transaction *trans);
-    void futherInfo_uribl(unsigned int high8bits, std::string ipStr,
-        Transaction *trans);
-    void furtherInfo(struct sockaddr_in *sin, std::string ipStr,
+    static void futherInfo_uribl(unsigned int high8bits, const std::string &ipStr,
         Transaction *trans);
+    static void furtherInfo(struct sockaddr_in *sin, const std::string &ipStr,
+        Transaction *trans, RblProvider provider);
 
+ private:
     std::string m_service;
     bool m_demandsPassword;
     RblProvider m_provider;
diff --git a/src/operators/rx.h b/src/operators/rx.h
index 7460c396..eddb32a4 100644
--- a/src/operators/rx.h
+++ b/src/operators/rx.h
@@ -37,7 +37,8 @@ class Rx : public Operator {
  public:
     /** @ingroup ModSecurity_Operator */
     explicit Rx(std::unique_ptr<RunTimeString> param)
-        : Operator("Rx", std::move(param)) {
+        : m_re(nullptr),
+        Operator("Rx", std::move(param)) {
             m_couldContainsMacro = true;
         }
 
diff --git a/src/operators/validate_url_encoding.cc b/src/operators/validate_url_encoding.cc
index 43b63e6a..532606d6 100644
--- a/src/operators/validate_url_encoding.cc
+++ b/src/operators/validate_url_encoding.cc
@@ -28,7 +28,7 @@ int ValidateUrlEncoding::validate_url_encoding(const char *input,
     int i;
     *offset = 0;
 
-    if ((input == NULL) || (input_length <= 0)) {
+    if ((input == NULL) || (input_length == 0)) {
         return -1;
     }
 
diff --git a/src/operators/validate_url_encoding.h b/src/operators/validate_url_encoding.h
index f52e8175..e803b811 100644
--- a/src/operators/validate_url_encoding.h
+++ b/src/operators/validate_url_encoding.h
@@ -34,7 +34,8 @@ class ValidateUrlEncoding : public Operator {
     bool evaluate(Transaction *transaction, Rule *rule,
         const std::string &input,
         std::shared_ptr<RuleMessage> ruleMessage) override;
-    int validate_url_encoding(const char *input, uint64_t input_length,
+
+    static int validate_url_encoding(const char *input, uint64_t input_length,
         size_t *offset);
 };
 
diff --git a/src/operators/validate_utf8_encoding.h b/src/operators/validate_utf8_encoding.h
index eb10dc6e..30a93a7f 100644
--- a/src/operators/validate_utf8_encoding.h
+++ b/src/operators/validate_utf8_encoding.h
@@ -42,7 +42,7 @@ class ValidateUtf8Encoding : public Operator {
         const std::string &str,
         std::shared_ptr<RuleMessage> ruleMessage) override;
 
-    int detect_utf8_character(const unsigned char *p_read,
+    static int detect_utf8_character(const unsigned char *p_read,
         unsigned int length);
 };
 
diff --git a/src/operators/verify_cc.cc b/src/operators/verify_cc.cc
index 76231776..0a3d53e6 100644
--- a/src/operators/verify_cc.cc
+++ b/src/operators/verify_cc.cc
@@ -120,7 +120,6 @@ bool VerifyCC::init(const std::string &param2, std::string *error) {
 bool VerifyCC::evaluate(Transaction *t, Rule *rule,
     const std::string& i, std::shared_ptr<RuleMessage> ruleMessage) {
     int offset = 0;
-    bool is_cc = false;
     int target_length = i.length();
 
     for (offset = 0; offset < target_length; offset++) {
@@ -139,7 +138,7 @@ bool VerifyCC::evaluate(Transaction *t, Rule *rule,
         }
         if (ret > 0) {
             match = std::string(i, ovector[0], ovector[1] - ovector[0]);
-            is_cc = luhnVerify(match.c_str(), match.size());
+            int is_cc = luhnVerify(match.c_str(), match.size());
             if (is_cc) {
                 if (t) {
                     if (rule && t && rule->m_containsCaptureAction) {
diff --git a/src/operators/verify_cc.h b/src/operators/verify_cc.h
index 47cbb057..0c819cbd 100644
--- a/src/operators/verify_cc.h
+++ b/src/operators/verify_cc.h
@@ -35,7 +35,6 @@ class VerifyCC : public Operator {
         m_pce(NULL) { }
     ~VerifyCC();
 
-    int luhnVerify(const char *ccnumber, int len);
     bool evaluate(Transaction *t, Rule *rule,
         const std::string& input,
         std::shared_ptr<RuleMessage> ruleMessage)  override;
@@ -43,6 +42,7 @@ class VerifyCC : public Operator {
  private:
     pcre *m_pc;
     pcre_extra *m_pce;
+    static int luhnVerify(const char *ccnumber, int len);
 };
 
 }  // namespace operators
diff --git a/src/operators/verify_cpf.cc b/src/operators/verify_cpf.cc
index a58adbdd..5c806d4b 100644
--- a/src/operators/verify_cpf.cc
+++ b/src/operators/verify_cpf.cc
@@ -37,31 +37,22 @@ int VerifyCPF::convert_to_int(const char c) {
     return n;
 }
 
+
 bool VerifyCPF::verify(const char *cpfnumber, int len) {
     int factor, part_1, part_2, var_len = len;
     unsigned int sum = 0, i = 0, cpf_len = 11, c;
     int cpf[11];
     char s_cpf[11];
-    char bad_cpf[12][12] = { "00000000000",
-        "01234567890",
-        "11111111111",
-        "22222222222",
-        "33333333333",
-        "44444444444",
-        "55555555555",
-        "66666666666",
-        "77777777777",
-        "88888888888",
-        "99999999999"};
 
     while ((*cpfnumber != '\0') && (var_len > 0)) {
-        if (*cpfnumber != '-' || *cpfnumber != '.') {
+        // Always true.
+        //if (*cpfnumber != '-' || *cpfnumber != '.') {
             if (i < cpf_len && isdigit(*cpfnumber)) {
                 s_cpf[i] = *cpfnumber;
                 cpf[i] = convert_to_int(*cpfnumber);
                 i++;
             }
-        }
+        //}
         cpfnumber++;
         var_len--;
     }
diff --git a/src/operators/verify_cpf.h b/src/operators/verify_cpf.h
index 893c47fb..04ab2768 100644
--- a/src/operators/verify_cpf.h
+++ b/src/operators/verify_cpf.h
@@ -42,6 +42,10 @@ class VerifyCPF : public Operator {
     ~VerifyCPF() {
         delete m_re;
     }
+
+    bool operator=(const VerifyCPF &a) = delete;
+    VerifyCPF(const VerifyCPF &a) = delete;
+
     bool evaluate(Transaction *transaction, Rule *rule,
         const std::string &input) override {
         return evaluate(transaction, NULL, input, NULL);
@@ -54,11 +58,22 @@ class VerifyCPF : public Operator {
         const std::string& input,
         std::shared_ptr<RuleMessage> ruleMessage) override;
 
-    int convert_to_int(const char c);
     bool verify(const char *ssnumber, int len);
 
  private:
+    static int convert_to_int(const char c);
     Regex *m_re;
+    const char bad_cpf[12][12] = { "00000000000",
+        "01234567890",
+        "11111111111",
+        "22222222222",
+        "33333333333",
+        "44444444444",
+        "55555555555",
+        "66666666666",
+        "77777777777",
+        "88888888888",
+        "99999999999"};
 };
 
 }  // namespace operators
diff --git a/src/operators/verify_ssn.cc b/src/operators/verify_ssn.cc
index deb97e6f..4dcb7450 100644
--- a/src/operators/verify_ssn.cc
+++ b/src/operators/verify_ssn.cc
@@ -24,6 +24,7 @@
 namespace modsecurity {
 namespace operators {
 
+
 int VerifySSN::convert_to_int(const char c) {
     int n;
     if ((c >= '0') && (c <= '9')) {
@@ -38,6 +39,7 @@ int VerifySSN::convert_to_int(const char c) {
     return n;
 }
 
+
 bool VerifySSN::verify(const char *ssnumber, int len) {
     int i;
     int num[9];
@@ -120,15 +122,15 @@ bool VerifySSN::evaluate(Transaction *t, Rule *rule,
 
     for (i = 0; i < input.size() - 1 && is_ssn == false; i++) {
         matches = m_re->searchAll(input.substr(i, input.size()));
-        for (const auto & i : matches) {
-            is_ssn = verify(i.str().c_str(), i.str().size());
+        for (const auto & j : matches) {
+            is_ssn = verify(j.str().c_str(), j.str().size());
             if (is_ssn) {
-                logOffset(ruleMessage, i.offset(), i.str().size());
+                logOffset(ruleMessage, j.offset(), j.str().size());
                 if (rule && t && rule->m_containsCaptureAction) {
                     t->m_collections.m_tx_collection->storeOrUpdateFirst(
-                        "0", i.str());
+                        "0", j.str());
                     ms_dbg_a(t, 7, "Added VerifySSN match TX.0: " + \
-                        i.str());
+                        j.str());
                 }
 
                 goto out;
diff --git a/src/operators/verify_ssn.h b/src/operators/verify_ssn.h
index c8cf7f16..0a28c5a6 100644
--- a/src/operators/verify_ssn.h
+++ b/src/operators/verify_ssn.h
@@ -42,6 +42,10 @@ class VerifySSN : public Operator {
     ~VerifySSN() {
         delete m_re;
     }
+
+    bool operator=(const VerifySSN &a) = delete;
+    VerifySSN(const VerifySSN &a) = delete;
+
     bool evaluate(Transaction *transaction, Rule *rule,
         const std::string &input) override {
         return evaluate(transaction, NULL, input, NULL);
@@ -54,10 +58,12 @@ class VerifySSN : public Operator {
         const std::string& input,
         std::shared_ptr<RuleMessage> ruleMessage) override;
 
-    int convert_to_int(const char c);
-    bool verify(const char *ssnumber, int len);
+
 
  private:
+    static bool verify(const char *ssnumber, int len);
+    static int convert_to_int(const char c);
+
     Regex *m_re;
 };
 
diff --git a/src/operators/verify_svnr.cc b/src/operators/verify_svnr.cc
index 17b49177..bede368d 100644
--- a/src/operators/verify_svnr.cc
+++ b/src/operators/verify_svnr.cc
@@ -11,8 +11,8 @@
 namespace modsecurity {
 namespace operators {
 
-int VerifySVNR::convert_to_int(const char c)
-{
+
+int VerifySVNR::convert_to_int(const char c) {
     int n;
     if ((c>='0') && (c<='9'))
         n = c - '0';
@@ -21,28 +21,18 @@ int VerifySVNR::convert_to_int(const char c)
     return n;
 }
 
+
 bool VerifySVNR::verify(const char *svnrnumber, int len) {
     int var_len = len;
     int sum = 0;
     unsigned int i = 0, svnr_len = 10;
     int svnr[11];
     char s_svnr[11];
-    char bad_svnr[12][11] = { "0000000000",
-        "0123456789",
-        "1234567890",
-        "1111111111",
-        "2222222222",
-        "3333333333",
-        "4444444444",
-        "5555555555",
-        "6666666666",
-        "7777777777",
-        "8888888888",
-        "9999999999"};
 
     while ((*svnrnumber != '\0') && ( var_len > 0))
     {
-        if (*svnrnumber != '-' || *svnrnumber != '.')
+        // Always true on the original code.
+        //if (*svnrnumber != '-' || *svnrnumber != '.')
         {
             if (i < svnr_len && isdigit(*svnrnumber))
             {
@@ -98,15 +88,15 @@ bool VerifySVNR::evaluate(Transaction *t, Rule *rule,
     for (i = 0; i < input.size() - 1 && is_svnr == false; i++) {
         matches = m_re->searchAll(input.substr(i, input.size()));
 
-        for (const auto & i : matches) {
-            is_svnr = verify(i.str().c_str(), i.str().size());
+        for (const auto & j : matches) {
+            is_svnr = verify(j.str().c_str(), j.str().size());
             if (is_svnr) {
-                logOffset(ruleMessage, i.offset(), i.str().size());
+                logOffset(ruleMessage, j.offset(), j.str().size());
                 if (rule && t && rule->m_containsCaptureAction) {
                     t->m_collections.m_tx_collection->storeOrUpdateFirst(
-                        "0", i.str());
+                        "0", j.str());
                     ms_dbg_a(t, 7, "Added VerifySVNR match TX.0: " + \
-                        i.str());
+                        j.str());
                 }
 
                 goto out;
diff --git a/src/operators/verify_svnr.h b/src/operators/verify_svnr.h
index c3ceda50..ce04185a 100644
--- a/src/operators/verify_svnr.h
+++ b/src/operators/verify_svnr.h
@@ -28,6 +28,10 @@ class VerifySVNR : public Operator {
     ~VerifySVNR() {
         delete m_re;
     }
+
+    bool operator=(const VerifySVNR &a) = delete;
+    VerifySVNR(const VerifySVNR &a) = delete;
+
     bool evaluate(Transaction *transaction, Rule *rule,
         const std::string &input) override {
         return evaluate(transaction, NULL, input, NULL);
@@ -40,11 +44,23 @@ class VerifySVNR : public Operator {
         const std::string& input,
         std::shared_ptr<RuleMessage> ruleMessage) override;
 
-    int convert_to_int(const char c);
     bool verify(const char *ssnumber, int len);
 
  private:
     Regex *m_re;
+    static int convert_to_int(const char c);
+    const char bad_svnr[12][11] = { "0000000000",
+        "0123456789",
+        "1234567890",
+        "1111111111",
+        "2222222222",
+        "3333333333",
+        "4444444444",
+        "5555555555",
+        "6666666666",
+        "7777777777",
+        "8888888888",
+        "9999999999"};
 };
 
 }  // namespace operators
diff --git a/src/operators/within.h b/src/operators/within.h
index fccf4ff5..ab27608a 100644
--- a/src/operators/within.h
+++ b/src/operators/within.h
@@ -34,7 +34,7 @@ class Within : public Operator {
             m_couldContainsMacro = true;
         }
     bool evaluate(Transaction *transaction, Rule *rule,
-        const std::string &str, std::shared_ptr<RuleMessage> ruleMessage);
+        const std::string &str, std::shared_ptr<RuleMessage> ruleMessage) override;
 };
 
 }  // namespace operators
diff --git a/src/utils/geo_lookup.cc b/src/utils/geo_lookup.cc
index 2be7e8f9..ff0030fa 100644
--- a/src/utils/geo_lookup.cc
+++ b/src/utils/geo_lookup.cc
@@ -106,7 +106,7 @@ bool GeoLookup::setDataBase(const std::string& filePath,
 
 
 bool GeoLookup::lookup(const std::string& target, Transaction *trans,
-    std::function<bool(int, std::string)> debug) const {
+    std::function<bool(int, const std::string &)> debug) const {
 
     if (m_version == NOT_LOADED) {
         if (debug) {
diff --git a/src/utils/geo_lookup.h b/src/utils/geo_lookup.h
index 28384605..2d0627af 100644
--- a/src/utils/geo_lookup.h
+++ b/src/utils/geo_lookup.h
@@ -50,7 +50,7 @@ class GeoLookup {
     void cleanUp();
 
     bool lookup(const std::string& target, Transaction *transaction,
-        std::function<bool(int, std::string)> debug) const;
+        std::function<bool(int, const std::string &)> debug) const;
 
  private:
     GeoLookup() :
diff --git a/test/cppcheck_suppressions.txt b/test/cppcheck_suppressions.txt
index 16c9269e..0edcf180 100644
--- a/test/cppcheck_suppressions.txt
+++ b/test/cppcheck_suppressions.txt
@@ -56,7 +56,6 @@ useStlAlgorithm:src/utils/shared_files.cc:41
 useStlAlgorithm:test/regression/regression.cc:493
 useStlAlgorithm:test/unit/unit.cc:174
 useStlAlgorithm:test/unit/unit.cc:209
-variableScope:src/operators/verify_cpf.cc:45
 unusedFunction
 funcArgNamesDifferent
 preprocessorErrorDirective
@@ -67,4 +66,8 @@ toomanyconfigs
 functionStatic:src/unique_id.h:49
 functionStatic:src/unique_id.h:50
 functionConst:src/utils/geo_lookup.h:49
-functionStatic:headers/modsecurity/transaction.h:374
\ No newline at end of file
+functionStatic:headers/modsecurity/transaction.h:374
+
+
+functionStatic:src/operators/geo_lookup.h:35
+useInitializationList:src/operators/rbl.h:69