diff --git a/internal/fail2ban/connector_agent.go b/internal/fail2ban/connector_agent.go
index 9c2050e..2d1dc1f 100644
--- a/internal/fail2ban/connector_agent.go
+++ b/internal/fail2ban/connector_agent.go
@@ -249,3 +249,45 @@ func (ac *AgentConnector) do(req *http.Request, out any) error {
 	}
 	return json.Unmarshal(data, out)
 }
+
+// GetAllJails implements Connector.
+func (ac *AgentConnector) GetAllJails(ctx context.Context) ([]JailInfo, error) {
+	var resp struct {
+		Jails []JailInfo `json:"jails"`
+	}
+	if err := ac.get(ctx, "/v1/jails/all", &resp); err != nil {
+		return nil, err
+	}
+	return resp.Jails, nil
+}
+
+// UpdateJailEnabledStates implements Connector.
+func (ac *AgentConnector) UpdateJailEnabledStates(ctx context.Context, updates map[string]bool) error {
+	return ac.post(ctx, "/v1/jails/update-enabled", updates, nil)
+}
+
+// GetFilters implements Connector.
+func (ac *AgentConnector) GetFilters(ctx context.Context) ([]string, error) {
+	var resp struct {
+		Filters []string `json:"filters"`
+	}
+	if err := ac.get(ctx, "/v1/filters", &resp); err != nil {
+		return nil, err
+	}
+	return resp.Filters, nil
+}
+
+// TestFilter implements Connector.
+func (ac *AgentConnector) TestFilter(ctx context.Context, filterName string, logLines []string) ([]string, error) {
+	payload := map[string]any{
+		"filterName": filterName,
+		"logLines":   logLines,
+	}
+	var resp struct {
+		Matches []string `json:"matches"`
+	}
+	if err := ac.post(ctx, "/v1/filters/test", payload, &resp); err != nil {
+		return nil, err
+	}
+	return resp.Matches, nil
+}
diff --git a/internal/fail2ban/connector_local.go b/internal/fail2ban/connector_local.go
index 9f4b724..e5bb834 100644
--- a/internal/fail2ban/connector_local.go
+++ b/internal/fail2ban/connector_local.go
@@ -8,6 +8,7 @@ import (
 	"os/exec"
 	"sort"
 	"strings"
+	"sync"
 	"time"
 
 	"github.com/swissmakers/fail2ban-ui/internal/config"
@@ -51,37 +52,61 @@ func (lc *LocalConnector) GetJailInfos(ctx context.Context) ([]JailInfo, error)
 	}
 
 	oneHourAgo := time.Now().Add(-1 * time.Hour)
-	var results []JailInfo
-	for _, jail := range jails {
-		select {
-		case <-ctx.Done():
-			return nil, ctx.Err()
-		default:
-		}
+	
+	// Use parallel execution for better performance
+	type jailResult struct {
+		jail JailInfo
+		err  error
+	}
+	results := make(chan jailResult, len(jails))
+	var wg sync.WaitGroup
 
-		bannedIPs, err := lc.GetBannedIPs(ctx, jail)
-		if err != nil {
-			continue
-		}
-		newInLastHour := 0
-		if events, ok := banHistory[jail]; ok {
-			for _, e := range events {
-				if e.Time.After(oneHourAgo) {
-					newInLastHour++
+	for _, jail := range jails {
+		wg.Add(1)
+		go func(j string) {
+			defer wg.Done()
+			bannedIPs, err := lc.GetBannedIPs(ctx, j)
+			if err != nil {
+				results <- jailResult{err: err}
+				return
+			}
+			newInLastHour := 0
+			if events, ok := banHistory[j]; ok {
+				for _, e := range events {
+					if e.Time.After(oneHourAgo) {
+						newInLastHour++
+					}
 				}
 			}
-		}
-
-		results = append(results, JailInfo{
-			JailName:      jail,
-			TotalBanned:   len(bannedIPs),
-			NewInLastHour: newInLastHour,
-			BannedIPs:     bannedIPs,
-			Enabled:       true,
-		})
+			results <- jailResult{
+				jail: JailInfo{
+					JailName:      j,
+					TotalBanned:   len(bannedIPs),
+					NewInLastHour: newInLastHour,
+					BannedIPs:     bannedIPs,
+					Enabled:       true,
+				},
+			}
+		}(jail)
 	}
 
-	return results, nil
+	go func() {
+		wg.Wait()
+		close(results)
+	}()
+
+	var finalResults []JailInfo
+	for result := range results {
+		if result.err != nil {
+			continue
+		}
+		finalResults = append(finalResults, result.jail)
+	}
+
+	sort.SliceStable(finalResults, func(i, j int) bool {
+		return finalResults[i].JailName < finalResults[j].JailName
+	})
+	return finalResults, nil
 }
 
 // GetBannedIPs implements Connector.
@@ -207,6 +232,26 @@ func (lc *LocalConnector) buildFail2banArgs(args ...string) []string {
 	return append(base, args...)
 }
 
+// GetAllJails implements Connector.
+func (lc *LocalConnector) GetAllJails(ctx context.Context) ([]JailInfo, error) {
+	return GetAllJails()
+}
+
+// UpdateJailEnabledStates implements Connector.
+func (lc *LocalConnector) UpdateJailEnabledStates(ctx context.Context, updates map[string]bool) error {
+	return UpdateJailEnabledStates(updates)
+}
+
+// GetFilters implements Connector.
+func (lc *LocalConnector) GetFilters(ctx context.Context) ([]string, error) {
+	return GetFiltersLocal()
+}
+
+// TestFilter implements Connector.
+func (lc *LocalConnector) TestFilter(ctx context.Context, filterName string, logLines []string) ([]string, error) {
+	return TestFilterLocal(filterName, logLines)
+}
+
 func executeShellCommand(ctx context.Context, command string) (string, error) {
 	parts := strings.Fields(command)
 	if len(parts) == 0 {
diff --git a/internal/fail2ban/connector_ssh.go b/internal/fail2ban/connector_ssh.go
index c119ad8..22ace6b 100644
--- a/internal/fail2ban/connector_ssh.go
+++ b/internal/fail2ban/connector_ssh.go
@@ -1,6 +1,7 @@
 package fail2ban
 
 import (
+	"bufio"
 	"context"
 	"encoding/base64"
 	"fmt"
@@ -8,11 +9,12 @@ import (
 	"sort"
 	"strconv"
 	"strings"
+	"sync"
 
 	"github.com/swissmakers/fail2ban-ui/internal/config"
 )
 
-const sshEnsureActionScript = `sudo python3 - <<'PY'
+const sshEnsureActionScript = `python3 - <<'PY'
 import base64
 import pathlib
 
@@ -90,24 +92,46 @@ func (sc *SSHConnector) GetJailInfos(ctx context.Context) ([]JailInfo, error) {
 		return nil, err
 	}
 
-	var infos []JailInfo
+	// Use parallel execution for better performance
+	type jailResult struct {
+		jail JailInfo
+		err  error
+	}
+	results := make(chan jailResult, len(jails))
+	var wg sync.WaitGroup
+
 	for _, jail := range jails {
-		select {
-		case <-ctx.Done():
-			return nil, ctx.Err()
-		default:
-		}
-		ips, err := sc.GetBannedIPs(ctx, jail)
-		if err != nil {
+		wg.Add(1)
+		go func(j string) {
+			defer wg.Done()
+			ips, err := sc.GetBannedIPs(ctx, j)
+			if err != nil {
+				results <- jailResult{err: err}
+				return
+			}
+			results <- jailResult{
+				jail: JailInfo{
+					JailName:      j,
+					TotalBanned:   len(ips),
+					NewInLastHour: 0,
+					BannedIPs:     ips,
+					Enabled:       true,
+				},
+			}
+		}(jail)
+	}
+
+	go func() {
+		wg.Wait()
+		close(results)
+	}()
+
+	var infos []JailInfo
+	for result := range results {
+		if result.err != nil {
 			continue
 		}
-		infos = append(infos, JailInfo{
-			JailName:      jail,
-			TotalBanned:   len(ips),
-			NewInLastHour: 0,
-			BannedIPs:     ips,
-			Enabled:       true,
-		})
+		infos = append(infos, result.jail)
 	}
 
 	sort.SliceStable(infos, func(i, j int) bool {
@@ -177,7 +201,10 @@ func (sc *SSHConnector) ensureAction(ctx context.Context) error {
 	actionConfig := config.BuildFail2banActionConfig(callbackURL)
 	payload := base64.StdEncoding.EncodeToString([]byte(actionConfig))
 	script := strings.ReplaceAll(sshEnsureActionScript, "__PAYLOAD__", payload)
-	_, err := sc.runRemoteCommand(ctx, []string{"bash", "-lc", script})
+	// Base64 encode the entire script to avoid shell escaping issues
+	scriptB64 := base64.StdEncoding.EncodeToString([]byte(script))
+	cmd := fmt.Sprintf("echo %s | base64 -d | sudo bash", scriptB64)
+	_, err := sc.runRemoteCommand(ctx, []string{"bash", "-lc", cmd})
 	return err
 }
 
@@ -254,3 +281,176 @@ func (sc *SSHConnector) buildSSHArgs(command []string) []string {
 	args = append(args, command...)
 	return args
 }
+
+// GetAllJails implements Connector.
+func (sc *SSHConnector) GetAllJails(ctx context.Context) ([]JailInfo, error) {
+	// Read jail.local and jail.d files remotely
+	var allJails []JailInfo
+
+	// Parse jail.local
+	jailLocalContent, err := sc.runRemoteCommand(ctx, []string{"sudo", "cat", "/etc/fail2ban/jail.local"})
+	if err == nil {
+		jails := parseJailConfigContent(jailLocalContent)
+		allJails = append(allJails, jails...)
+	}
+
+	// Parse jail.d directory
+	jailDList, err := sc.runRemoteCommand(ctx, []string{"sudo", "bash", "-c", "for f in /etc/fail2ban/jail.d/*.conf; do [ -f \"$f\" ] && echo \"$f\"; done"})
+	if err == nil && jailDList != "" {
+		for _, file := range strings.Split(jailDList, "\n") {
+			file = strings.TrimSpace(file)
+			if file == "" {
+				continue
+			}
+			content, err := sc.runRemoteCommand(ctx, []string{"sudo", "cat", file})
+			if err == nil {
+				jails := parseJailConfigContent(content)
+				allJails = append(allJails, jails...)
+			}
+		}
+	}
+
+	return allJails, nil
+}
+
+// UpdateJailEnabledStates implements Connector.
+func (sc *SSHConnector) UpdateJailEnabledStates(ctx context.Context, updates map[string]bool) error {
+	// Read current jail.local
+	content, err := sc.runRemoteCommand(ctx, []string{"sudo", "cat", "/etc/fail2ban/jail.local"})
+	if err != nil {
+		return fmt.Errorf("failed to read jail.local: %w", err)
+	}
+
+	// Update enabled states
+	lines := strings.Split(content, "\n")
+	var outputLines []string
+	var currentJail string
+	for _, line := range lines {
+		trimmed := strings.TrimSpace(line)
+		if strings.HasPrefix(trimmed, "[") && strings.HasSuffix(trimmed, "]") {
+			currentJail = strings.Trim(trimmed, "[]")
+			outputLines = append(outputLines, line)
+		} else if strings.HasPrefix(trimmed, "enabled") {
+			if val, ok := updates[currentJail]; ok {
+				outputLines = append(outputLines, fmt.Sprintf("enabled = %t", val))
+				delete(updates, currentJail)
+			} else {
+				outputLines = append(outputLines, line)
+			}
+		} else {
+			outputLines = append(outputLines, line)
+		}
+	}
+
+	// Write back
+	newContent := strings.Join(outputLines, "\n")
+	cmd := fmt.Sprintf("cat <<'EOF' | sudo tee /etc/fail2ban/jail.local >/dev/null\n%s\nEOF", newContent)
+	_, err = sc.runRemoteCommand(ctx, []string{"bash", "-lc", cmd})
+	return err
+}
+
+// GetFilters implements Connector.
+func (sc *SSHConnector) GetFilters(ctx context.Context) ([]string, error) {
+	list, err := sc.runRemoteCommand(ctx, []string{"sudo", "bash", "-c", "for f in /etc/fail2ban/filter.d/*.conf; do [ -f \"$f\" ] && basename \"$f\" .conf; done"})
+	if err != nil {
+		return nil, fmt.Errorf("failed to list filters: %w", err)
+	}
+	var filters []string
+	for _, line := range strings.Split(list, "\n") {
+		line = strings.TrimSpace(line)
+		if line != "" {
+			filters = append(filters, line)
+		}
+	}
+	return filters, nil
+}
+
+// TestFilter implements Connector.
+func (sc *SSHConnector) TestFilter(ctx context.Context, filterName string, logLines []string) ([]string, error) {
+	if len(logLines) == 0 {
+		return []string{}, nil
+	}
+
+	// Read filter config remotely
+	filterPath := fmt.Sprintf("/etc/fail2ban/filter.d/%s.conf", filterName)
+	content, err := sc.runRemoteCommand(ctx, []string{"sudo", "cat", filterPath})
+	if err != nil {
+		return nil, fmt.Errorf("filter %s not found: %w", filterName, err)
+	}
+
+	// Extract failregex
+	var failregex string
+	scanner := bufio.NewScanner(strings.NewReader(content))
+	inFailregex := false
+	for scanner.Scan() {
+		line := strings.TrimSpace(scanner.Text())
+		if strings.HasPrefix(line, "[Definition]") {
+			inFailregex = true
+			continue
+		}
+		if inFailregex && strings.HasPrefix(line, "failregex") {
+			parts := strings.SplitN(line, "=", 2)
+			if len(parts) == 2 {
+				failregex = strings.TrimSpace(parts[1])
+			}
+			break
+		}
+		if inFailregex && strings.HasPrefix(line, "[") {
+			break
+		}
+	}
+	if failregex == "" {
+		return nil, fmt.Errorf("no failregex found in filter %s", filterName)
+	}
+
+	// Test each log line remotely
+	var matches []string
+	for _, logLine := range logLines {
+		if logLine == "" {
+			continue
+		}
+		// Escape the log line and regex for shell
+		escapedLine := strconv.Quote(logLine)
+		escapedRegex := strconv.Quote(failregex)
+		cmd := fmt.Sprintf("echo %s | sudo fail2ban-regex - %s", escapedLine, escapedRegex)
+		out, err := sc.runRemoteCommand(ctx, []string{"bash", "-lc", cmd})
+		if err == nil && strings.Contains(out, "Success") {
+			matches = append(matches, logLine)
+		}
+	}
+	return matches, nil
+}
+
+// parseJailConfigContent parses jail configuration content and returns JailInfo slice.
+func parseJailConfigContent(content string) []JailInfo {
+	var jails []JailInfo
+	scanner := bufio.NewScanner(strings.NewReader(content))
+	var currentJail string
+	enabled := true
+	for scanner.Scan() {
+		line := strings.TrimSpace(scanner.Text())
+		if strings.HasPrefix(line, "[") && strings.HasSuffix(line, "]") {
+			if currentJail != "" && currentJail != "DEFAULT" {
+				jails = append(jails, JailInfo{
+					JailName: currentJail,
+					Enabled:  enabled,
+				})
+			}
+			currentJail = strings.Trim(line, "[]")
+			enabled = true
+		} else if strings.HasPrefix(strings.ToLower(line), "enabled") {
+			parts := strings.Split(line, "=")
+			if len(parts) == 2 {
+				value := strings.TrimSpace(parts[1])
+				enabled = strings.EqualFold(value, "true")
+			}
+		}
+	}
+	if currentJail != "" && currentJail != "DEFAULT" {
+		jails = append(jails, JailInfo{
+			JailName: currentJail,
+			Enabled:  enabled,
+		})
+	}
+	return jails
+}
diff --git a/internal/fail2ban/filter_management.go b/internal/fail2ban/filter_management.go
index b03750b..c625d06 100644
--- a/internal/fail2ban/filter_management.go
+++ b/internal/fail2ban/filter_management.go
@@ -17,10 +17,13 @@
 package fail2ban
 
 import (
+	"bufio"
 	"context"
 	"fmt"
 	"os"
+	"os/exec"
 	"path/filepath"
+	"strings"
 )
 
 // GetFilterConfig returns the filter configuration using the default connector.
@@ -59,3 +62,73 @@ func SetFilterConfigLocal(jail, newContent string) error {
 	}
 	return nil
 }
+
+// GetFiltersLocal returns a list of filter names from /etc/fail2ban/filter.d
+func GetFiltersLocal() ([]string, error) {
+	dir := "/etc/fail2ban/filter.d"
+	entries, err := os.ReadDir(dir)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read filter directory: %w", err)
+	}
+	var filters []string
+	for _, entry := range entries {
+		if !entry.IsDir() && strings.HasSuffix(entry.Name(), ".conf") {
+			name := strings.TrimSuffix(entry.Name(), ".conf")
+			filters = append(filters, name)
+		}
+	}
+	return filters, nil
+}
+
+// TestFilterLocal tests a filter against log lines using fail2ban-regex
+func TestFilterLocal(filterName string, logLines []string) ([]string, error) {
+	if len(logLines) == 0 {
+		return []string{}, nil
+	}
+	filterPath := filepath.Join("/etc/fail2ban/filter.d", filterName+".conf")
+	if _, err := os.Stat(filterPath); err != nil {
+		return nil, fmt.Errorf("filter %s not found: %w", filterName, err)
+	}
+	// Read the filter config to extract the failregex
+	content, err := os.ReadFile(filterPath)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read filter config: %w", err)
+	}
+	// Extract failregex from the config
+	var failregex string
+	scanner := bufio.NewScanner(strings.NewReader(string(content)))
+	inFailregex := false
+	for scanner.Scan() {
+		line := strings.TrimSpace(scanner.Text())
+		if strings.HasPrefix(line, "[Definition]") {
+			inFailregex = true
+			continue
+		}
+		if inFailregex && strings.HasPrefix(line, "failregex") {
+			parts := strings.SplitN(line, "=", 2)
+			if len(parts) == 2 {
+				failregex = strings.TrimSpace(parts[1])
+			}
+			break
+		}
+		if inFailregex && strings.HasPrefix(line, "[") {
+			break
+		}
+	}
+	if failregex == "" {
+		return nil, fmt.Errorf("no failregex found in filter %s", filterName)
+	}
+	// Use fail2ban-regex to test
+	var matches []string
+	for _, logLine := range logLines {
+		if logLine == "" {
+			continue
+		}
+		cmd := exec.Command("fail2ban-regex", logLine, failregex)
+		out, err := cmd.CombinedOutput()
+		if err == nil && strings.Contains(string(out), "Success") {
+			matches = append(matches, logLine)
+		}
+	}
+	return matches, nil
+}
diff --git a/internal/fail2ban/manager.go b/internal/fail2ban/manager.go
index 7de95ef..fd31a2a 100644
--- a/internal/fail2ban/manager.go
+++ b/internal/fail2ban/manager.go
@@ -21,6 +21,14 @@ type Connector interface {
 	GetFilterConfig(ctx context.Context, jail string) (string, error)
 	SetFilterConfig(ctx context.Context, jail, content string) error
 	FetchBanEvents(ctx context.Context, limit int) ([]BanEvent, error)
+
+	// Jail management
+	GetAllJails(ctx context.Context) ([]JailInfo, error)
+	UpdateJailEnabledStates(ctx context.Context, updates map[string]bool) error
+
+	// Filter operations
+	GetFilters(ctx context.Context) ([]string, error)
+	TestFilter(ctx context.Context, filterName string, logLines []string) ([]string, error)
 }
 
 // Manager orchestrates all connectors for configured Fail2ban servers.
diff --git a/pkg/web/handlers.go b/pkg/web/handlers.go
index 6dae5b7..97517f9 100644
--- a/pkg/web/handlers.go
+++ b/pkg/web/handlers.go
@@ -578,9 +578,12 @@ func SetJailFilterConfigHandler(c *gin.Context) {
 func ManageJailsHandler(c *gin.Context) {
 	config.DebugLog("----------------------------")
 	config.DebugLog("ManageJailsHandler called (handlers.go)") // entry point
-	// Get all jails from jail.local and jail.d directories.
-	// This helper should parse both files and return []fail2ban.JailInfo.
-	jails, err := fail2ban.GetAllJails()
+	conn, err := resolveConnector(c)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+	jails, err := conn.GetAllJails(c.Request.Context())
 	if err != nil {
 		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to load jails: " + err.Error()})
 		return
@@ -594,21 +597,21 @@ func ManageJailsHandler(c *gin.Context) {
 func UpdateJailManagementHandler(c *gin.Context) {
 	config.DebugLog("----------------------------")
 	config.DebugLog("UpdateJailManagementHandler called (handlers.go)") // entry point
+	conn, err := resolveConnector(c)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
 	var updates map[string]bool
 	if err := c.ShouldBindJSON(&updates); err != nil {
 		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid JSON: " + err.Error()})
 		return
 	}
 	// Update jail configuration file(s) with the new enabled states.
-	if err := fail2ban.UpdateJailEnabledStates(updates); err != nil {
+	if err := conn.UpdateJailEnabledStates(c.Request.Context(), updates); err != nil {
 		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to update jail settings: " + err.Error()})
 		return
 	}
-	// Restart the Fail2ban service.
-	//if err := fail2ban.RestartFail2ban(); err != nil {
-	//	c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to reload fail2ban: " + err.Error()})
-	//	return
-	//}
 	if err := config.MarkRestartNeeded(); err != nil {
 		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
 		return
@@ -669,43 +672,35 @@ func ListFiltersHandler(c *gin.Context) {
 		return
 	}
 	server := conn.Server()
-	if server.Type != "local" {
-		c.JSON(http.StatusOK, gin.H{"filters": []string{}, "messageKey": "filter_debug.not_available"})
-		return
-	}
-
-	dir := "/etc/fail2ban/filter.d"
-	if _, statErr := os.Stat(dir); statErr != nil {
-		if os.IsNotExist(statErr) {
-			c.JSON(http.StatusOK, gin.H{"filters": []string{}, "messageKey": "filter_debug.local_missing"})
+	if server.Type == "local" {
+		// For local, check if directory exists first
+		dir := "/etc/fail2ban/filter.d"
+		if _, statErr := os.Stat(dir); statErr != nil {
+			if os.IsNotExist(statErr) {
+				c.JSON(http.StatusOK, gin.H{"filters": []string{}, "messageKey": "filter_debug.local_missing"})
+				return
+			}
+			c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to read filter directory: " + statErr.Error()})
 			return
 		}
-		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to read filter directory: " + statErr.Error()})
-		return
 	}
 
-	files, err := os.ReadDir(dir)
+	filters, err := conn.GetFilters(c.Request.Context())
 	if err != nil {
-		c.JSON(http.StatusInternalServerError, gin.H{
-			"error": "Failed to read filter directory: " + err.Error(),
-		})
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to list filters: " + err.Error()})
 		return
 	}
-
-	var filters []string
-	for _, f := range files {
-		if !f.IsDir() && strings.HasSuffix(f.Name(), ".conf") {
-			name := strings.TrimSuffix(f.Name(), ".conf")
-			filters = append(filters, name)
-		}
-	}
-
 	c.JSON(http.StatusOK, gin.H{"filters": filters})
 }
 
 func TestFilterHandler(c *gin.Context) {
 	config.DebugLog("----------------------------")
 	config.DebugLog("TestFilterHandler called (handlers.go)") // entry point
+	conn, err := resolveConnector(c)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
 	var req struct {
 		FilterName string   `json:"filterName"`
 		LogLines   []string `json:"logLines"`
@@ -715,8 +710,12 @@ func TestFilterHandler(c *gin.Context) {
 		return
 	}
 
-	// For now, just pretend nothing matches
-	c.JSON(http.StatusOK, gin.H{"matches": []string{}})
+	matches, err := conn.TestFilter(c.Request.Context(), req.FilterName, req.LogLines)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to test filter: " + err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"matches": matches})
 }
 
 // ApplyFail2banSettings updates /etc/fail2ban/jail.local [DEFAULT] with our JSON