diff --git a/nas/auth.go b/nas/auth.go
index 249ae9d..22f84a9 100644
--- a/nas/auth.go
+++ b/nas/auth.go
@@ -159,7 +159,7 @@ func handleAuthRequest(moduleName string, w http.ResponseWriter, r *http.Request
 			param.Set(key, common.Base64DwcEncoding.EncodeToString([]byte(value)))
 		}
 		response = []byte(param.Encode())
-		response = []byte(strings.Replace(string(response), "%2A", "*", -1))
+		response = []byte(strings.ReplaceAll(string(response), "%2A", "*"))
 	}
 
 	// DWC treats the response like a null terminated string
@@ -167,7 +167,10 @@ func handleAuthRequest(moduleName string, w http.ResponseWriter, r *http.Request
 
 	w.Header().Set("Content-Type", "text/plain")
 	w.Header().Set("Content-Length", strconv.Itoa(len(response)))
-	w.Write(response)
+	_, err = w.Write(response)
+	if err != nil {
+		logging.Error("NAS", "Error writing response:", err)
+	}
 }
 
 func acctcreate() map[string]string {
diff --git a/nas/conntest.go b/nas/conntest.go
index 034e5bf..6403e2c 100644
--- a/nas/conntest.go
+++ b/nas/conntest.go
@@ -23,5 +23,5 @@ func handleConnectionTest(w http.ResponseWriter) {
 	w.Header().Set("X-Organization", "Nintendo")
 	w.Header().Set("Connection", "Keep-Alive")
 	w.WriteHeader(200)
-	w.Write([]byte(response))
+	_, _ = w.Write([]byte(response))
 }
diff --git a/nas/https.go b/nas/https.go
index 492b410..5006760 100644
--- a/nas/https.go
+++ b/nas/https.go
@@ -75,7 +75,7 @@ func startHTTPSProxy(config common.Config) {
 		}
 	}()
 
-	if !(exploitWii || exploitDS) {
+	if !exploitWii && !exploitDS {
 		// Only handle real TLS requests
 		for {
 			conn, err := l.Accept()
@@ -86,7 +86,7 @@ func startHTTPSProxy(config common.Config) {
 			go func() {
 				moduleName := "NAS-TLS:" + conn.RemoteAddr().String()
 
-				conn.SetDeadline(time.Now().UTC().Add(25 * time.Second))
+				_ = conn.SetDeadline(time.Now().UTC().Add(25 * time.Second))
 
 				handleRealTLS(moduleName, conn, nasAddr)
 			}()
@@ -241,7 +241,7 @@ func startHTTPSProxy(config common.Config) {
 
 			moduleName := "NAS-TLS:" + conn.RemoteAddr().String()
 
-			conn.SetDeadline(time.Now().UTC().Add(5 * time.Second))
+			_ = conn.SetDeadline(time.Now().UTC().Add(5 * time.Second))
 
 			handleTLS(moduleName, conn, nasAddr, serverCertsRecordWii, rsaKeyWii, serverCertsRecordDS, rsaKeyDS)
 		}()
@@ -259,7 +259,9 @@ func handleTLS(moduleName string, rawConn net.Conn, nasAddr string, serverCertsR
 
 	conn := newBufferedConn(rawConn)
 
-	defer conn.Close()
+	defer func() {
+		_ = conn.Close()
+	}()
 
 	// Read client hello
 	// fmt.Printf("Client Hello:\n")
@@ -316,7 +318,7 @@ func handleTLS(moduleName string, rawConn net.Conn, nasAddr string, serverCertsR
 		}
 	}
 
-	conn.SetDeadline(time.Now().UTC().Add(25 * time.Second))
+	_ = conn.SetDeadline(time.Now().UTC().Add(25 * time.Second))
 
 	// logging.Info(moduleName, "Forwarding client hello:", aurora.Cyan(fmt.Sprintf("% X ", helloBytes)))
 	handleRealTLS(moduleName, conn, nasAddr)
@@ -684,7 +686,9 @@ func proxyConsoleTLS(moduleName string, conn bufferedConn, nasAddr string, versi
 		panic(err)
 	}
 
-	defer newConn.Close()
+	defer func() {
+		_ = newConn.Close()
+	}()
 
 	// Read bytes from the HTTP server and forward them through the TLS connection
 	go func() {
@@ -734,11 +738,7 @@ func proxyConsoleTLS(moduleName string, conn bufferedConn, nasAddr string, versi
 		index += n
 		total += n
 
-		for {
-			if index < 5 {
-				break
-			}
-
+		for index < 5 {
 			if buf[0] < 0x15 || buf[0] > 0x17 {
 				logging.Error(moduleName, "Invalid record type")
 				return
@@ -842,7 +842,9 @@ func handleRealTLS(moduleName string, conn net.Conn, nasAddr string) {
 		panic(err)
 	}
 
-	defer newConn.Close()
+	defer func() {
+		_ = newConn.Close()
+	}()
 
 	// Read bytes from the HTTP server and forward them through the TLS connection
 	go func() {
diff --git a/nas/main.go b/nas/main.go
index 283dd7f..a23ceff 100644
--- a/nas/main.go
+++ b/nas/main.go
@@ -195,7 +195,7 @@ func replyHTTPError(w http.ResponseWriter, errorCode int, errorString string) {
 	w.Header().Set("Connection", "close")
 	w.Header().Set("Server", "Nintendo")
 	w.WriteHeader(errorCode)
-	w.Write([]byte(response))
+	_, _ = w.Write([]byte(response))
 }
 
 func handleNASTest(w http.ResponseWriter) {
@@ -214,7 +214,7 @@ func handleNASTest(w http.ResponseWriter) {
 	w.Header().Set("Server", "Nintendo")
 
 	w.WriteHeader(200)
-	w.Write([]byte(response))
+	_, _ = w.Write([]byte(response))
 }
 
 func forwardPayloadRequest(moduleName string, w http.ResponseWriter, r *http.Request) {
@@ -233,7 +233,9 @@ func forwardPayloadRequest(moduleName string, w http.ResponseWriter, r *http.Req
 		replyHTTPError(w, http.StatusBadGateway, "502 Bad Gateway")
 		return
 	}
-	defer resp.Body.Close()
+	defer func() {
+		_ = resp.Body.Close()
+	}()
 
 	// Copy the response headers and status code
 	for key, values := range resp.Header {
@@ -246,9 +248,12 @@ func forwardPayloadRequest(moduleName string, w http.ResponseWriter, r *http.Req
 	// Copy the response body
 	body, err := io.ReadAll(resp.Body)
 	if err != nil {
-		logging.Error(moduleName, "Error reading response body:", err)
+		logging.Error(moduleName, "Error reading payload response body:", err)
 		replyHTTPError(w, http.StatusInternalServerError, "500 Internal Server Error")
 		return
 	}
-	w.Write(body)
+	_, err = w.Write(body)
+	if err != nil {
+		logging.Error(moduleName, "Error writing payload response body:", err)
+	}
 }
diff --git a/nas/payload.go b/nas/payload.go
index ff79997..9c21b3b 100644
--- a/nas/payload.go
+++ b/nas/payload.go
@@ -32,7 +32,10 @@ func downloadStage1(w http.ResponseWriter, stage1Ver int) {
 
 	w.Header().Set("Content-Type", "text/plain")
 	w.Header().Set("Content-Length", strconv.Itoa(len(payload)))
-	w.Write(payload)
+	_, err = w.Write(payload)
+	if err != nil {
+		logging.Error("NAS", "Error writing stage 1 payload:", err)
+	}
 }
 
 func handlePayloadRequest(moduleName string, w http.ResponseWriter, r *http.Request) {
@@ -171,5 +174,8 @@ func handlePayloadRequest(moduleName string, w http.ResponseWriter, r *http.Requ
 	dat = append(append(dat[:0x10], signature...), dat[0x110:]...)
 
 	w.Header().Set("Content-Length", strconv.Itoa(len(dat)))
-	w.Write(dat)
+	_, err = w.Write(dat)
+	if err != nil {
+		logging.Error("NAS", "Error writing payload response body:", err)
+	}
 }
diff --git a/nas/profanity.go b/nas/profanity.go
index 2b8cd14..2d9e3cd 100644
--- a/nas/profanity.go
+++ b/nas/profanity.go
@@ -6,6 +6,7 @@ import (
 	"os"
 	"strings"
 	"time"
+	"wwfc/common"
 )
 
 var profanityFilePath = "./profanity.txt"
@@ -13,15 +14,15 @@ var profanityFileLines []string = nil
 var lastModTime time.Time
 
 var symbolEquivalences = map[rune]rune{
-    '1': 'i',
-    '0': 'o',
-    '5': 's',
-    '4': 'a',
-    '3': 'e',
-    '7': 't',
-    '9': 'g',
-    '2': 'z',
-    '(': 'c',
+	'1': 'i',
+	'0': 'o',
+	'5': 's',
+	'4': 'a',
+	'3': 'e',
+	'7': 't',
+	'9': 'g',
+	'2': 'z',
+	'(': 'c',
 }
 
 func CacheProfanityFile() error {
@@ -38,7 +39,9 @@ func CacheProfanityFile() error {
 	if err != nil {
 		return err
 	}
-	defer file.Close()
+	defer func() {
+		common.ShouldNotError(file.Close())
+	}()
 
 	profanityFileLines = nil
 	scanner := bufio.NewScanner(file)