fix(firewall): remove strict validation for rule.iface attribute (#1199)

Signed-off-by: Pavel Boldyrev <627562+bpg@users.noreply.github.com>

fwprovider/tests/resource_firewall_test.go

@@ -0,0 +1,58 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package tests
+
+import (
+	"testing"
+
+	"github.com/hashicorp/terraform-plugin-testing/helper/resource"
+)
+
+func TestAccResourceClusterFirewall(t *testing.T) {
+	te := initTestEnvironment(t)
+
+	tests := []struct {
+		name  string
+		steps []resource.TestStep
+	}{
+		{"rules1", []resource.TestStep{{
+			Config: te.renderConfig(`
+			resource "proxmox_virtual_environment_firewall_rules" "rules1" {
+				rule {
+					type   = "in"
+					action = "ACCEPT"
+					iface  = "vmbr0"
+					dport = "8006"
+					proto = "tcp"
+					comment = "PVE Admin Interface"
+				}
+			}`),
+			Check: resource.ComposeTestCheckFunc(
+				testResourceAttributes("proxmox_virtual_environment_firewall_rules.rules1", map[string]string{
+					"rule.0.type":    "in",
+					"rule.0.action":  "ACCEPT",
+					"rule.0.iface":   "vmbr0",
+					"rule.0.dport":   "8006",
+					"rule.0.proto":   "tcp",
+					"rule.0.comment": "PVE Admin Interface",
+				}),
+				testNoResourceAttributesSet("proxmox_virtual_environment_firewall_rules.rules1", []string{
+					"node_name",
+				}),
+			),
+		}}},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			resource.ParallelTest(t, resource.TestCase{
+				ProtoV6ProviderFactories: te.accProviders,
+				Steps:                    tt.steps,
+			})
+		})
+	}
+}

proxmoxtf/resource/firewall/rules.go

@@ -115,9 +115,8 @@ func Rules() *schema.Resource {
 			Type: schema.TypeString,
 			Description: "Network interface name. You have to use network configuration key names for VMs" +
 				" and containers ('net\\d+'). Host related rules can use arbitrary strings.",
-			Optional:         true,
-			Default:          dvRuleIface,
-			ValidateDiagFunc: validators.FirewallIFace(),
+			Optional: true,
+			Default:  dvRuleIface,
 		},
 		mkRuleLog: {
 			Type: schema.TypeString,