diff --git a/connect-vpn/action.yml b/connect-vpn/action.yml
index 621afe4..29f8e25 100644
--- a/connect-vpn/action.yml
+++ b/connect-vpn/action.yml
@@ -142,12 +142,18 @@ runs:
             OTP=$(oathtool --totp "$SEED")
             ;;
           base64)
-            # base64 키를 디코딩 → raw 바이트를 hex로 변환 → oathtool에 hex로 전달
-            SEED_HEX=$(printf '%s' "$SEED" | base64 -d 2>/dev/null | od -An -v -tx1 | tr -d ' \n')
-            if [ -z "$SEED_HEX" ]; then
+            # base64가 raw secret을 감싼 경우와 base32 문자열을 감싼 경우를 모두 지원
+            DECODED_SEED=$(printf '%s' "$SEED" | base64 -d 2>/dev/null || true)
+            if [ -z "$DECODED_SEED" ]; then
               echo "base64 디코딩 실패: 시드가 올바른 base64인지 확인"; exit 1
             fi
-            OTP=$(oathtool --totp "$SEED_HEX")
+            DECODED_BASE32=$(printf '%s' "$DECODED_SEED" | tr -d '[:space:]' | tr 'a-z' 'A-Z')
+            if printf '%s' "$DECODED_BASE32" | grep -Eq '^[A-Z2-7]+=*$'; then
+              OTP=$(oathtool --totp -b "$DECODED_BASE32")
+            else
+              SEED_HEX=$(printf '%s' "$SEED" | base64 -d 2>/dev/null | od -An -v -tx1 | tr -d ' \n')
+              OTP=$(oathtool --totp "$SEED_HEX")
+            fi
             ;;
           *)
             echo "잘못된 otp-seed-format: $OTP_SEED_FORMAT (base32|hex|base64)"; exit 1
@@ -177,7 +183,7 @@ runs:
 
         # 연결은 백그라운드 데몬에서 비동기로 진행 → --info를 폴링해 완료 대기
         echo "연결 완료 대기 중 (최대 ${TIMEOUT}초)..."
-        DISCONNECTED_PATTERN="not connected|Client not connected|Please login|Unable to open message queue|disconnected|로그인"
+        DISCONNECTED_PATTERN="not connected|Client not connected|Please login|Unable to open message queue|disconnected|logon failed|로그인"
         for i in $(seq 1 "$TIMEOUT"); do
           INFO=$($SUDO f5fpc --info 2>&1 || true)
           if [ "$i" -eq 1 ] || [ $((i % 5)) -eq 0 ]; then
@@ -188,6 +194,11 @@ runs:
               echo "(f5fpc --info 출력 없음)"
             fi
           fi
+          if echo "$INFO" | grep -Eqi "logon failed"; then
+            echo "VPN 로그인 실패:"
+            echo "$INFO"
+            exit 1
+          fi
           if echo "$INFO" | grep -Eqi "$DISCONNECTED_PATTERN"; then
             sleep 1
             continue