[management] Add backward compatibility for older clients without firewall rules port range support (#4003)

Adds backward compatibility for clients with versions prior to v0.48.0 that do not support port range firewall rules.

- Skips generation of firewall rules with multi-port ranges for older clients
- Preserves support for single-port ranges by treating them as individual port rules, ensuring compatibility with older clients

management/server/posture/nb_version.go

@@ -24,20 +24,12 @@ func sanitizeVersion(version string) string {
 }
 
 func (n *NBVersionCheck) Check(ctx context.Context, peer nbpeer.Peer) (bool, error) {
-	peerVersion := sanitizeVersion(peer.Meta.WtVersion)
-	minVersion := sanitizeVersion(n.MinVersion)
-
-	peerNBVersion, err := version.NewVersion(peerVersion)
+	meetsMin, err := MeetsMinVersion(n.MinVersion, peer.Meta.WtVersion)
 	if err != nil {
 		return false, err
 	}
 
-	constraints, err := version.NewConstraint(">= " + minVersion)
-	if err != nil {
-		return false, err
-	}
-
-	if constraints.Check(peerNBVersion) {
+	if meetsMin {
 		return true, nil
 	}
 
@@ -60,3 +52,21 @@ func (n *NBVersionCheck) Validate() error {
 	}
 	return nil
 }
+
+// MeetsMinVersion checks if the peer's version meets or exceeds the minimum required version
+func MeetsMinVersion(minVer, peerVer string) (bool, error) {
+	peerVer = sanitizeVersion(peerVer)
+	minVer = sanitizeVersion(minVer)
+
+	peerNBVer, err := version.NewVersion(peerVer)
+	if err != nil {
+		return false, err
+	}
+
+	constraints, err := version.NewConstraint(">= " + minVer)
+	if err != nil {
+		return false, err
+	}
+
+	return constraints.Check(peerNBVer), nil
+}

management/server/posture/nb_version_test.go

@@ -139,3 +139,68 @@ func TestNBVersionCheck_Validate(t *testing.T) {
 		})
 	}
 }
+
+func TestMeetsMinVersion(t *testing.T) {
+	tests := []struct {
+		name    string
+		minVer  string
+		peerVer string
+		want    bool
+		wantErr bool
+	}{
+		{
+			name:    "Peer version greater than min version",
+			minVer:  "0.26.0",
+			peerVer: "0.60.1",
+			want:    true,
+			wantErr: false,
+		},
+		{
+			name:    "Peer version equals min version",
+			minVer:  "1.0.0",
+			peerVer: "1.0.0",
+			want:    true,
+			wantErr: false,
+		},
+		{
+			name:    "Peer version less than min version",
+			minVer:  "1.0.0",
+			peerVer: "0.9.9",
+			want:    false,
+			wantErr: false,
+		},
+		{
+			name:    "Peer version with pre-release tag greater than min version",
+			minVer:  "1.0.0",
+			peerVer: "1.0.1-alpha",
+			want:    true,
+			wantErr: false,
+		},
+		{
+			name:    "Invalid peer version format",
+			minVer:  "1.0.0",
+			peerVer: "dev",
+			want:    false,
+			wantErr: true,
+		},
+		{
+			name:    "Invalid min version format",
+			minVer:  "invalid.version",
+			peerVer: "1.0.0",
+			want:    false,
+			wantErr: true,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := MeetsMinVersion(tt.minVer, tt.peerVer)
+			if tt.wantErr {
+				assert.Error(t, err)
+			} else {
+				assert.NoError(t, err)
+			}
+			assert.Equal(t, tt.want, got)
+		})
+	}
+}