diff --git a/internal/cli/server/config_legacy.go b/internal/cli/server/config_legacy.go
index 50508a58b6..9411b8290d 100644
--- a/internal/cli/server/config_legacy.go
+++ b/internal/cli/server/config_legacy.go
@@ -15,7 +15,7 @@ func readLegacyConfig(path string) (*Config, error) {
 		return nil, fmt.Errorf("failed to read toml config file: %v", err)
 	}
 
-	var conf Config
+	conf := *DefaultConfig()
 
 	if _, err := toml.Decode(tomlData, &conf); err != nil {
 		return nil, fmt.Errorf("failed to decode toml config file: %v", err)
diff --git a/internal/cli/server/config_legacy_test.go b/internal/cli/server/config_legacy_test.go
index 6fb662d62b..1b52096216 100644
--- a/internal/cli/server/config_legacy_test.go
+++ b/internal/cli/server/config_legacy_test.go
@@ -6,6 +6,8 @@ import (
 	"time"
 
 	"github.com/stretchr/testify/assert"
+
+	"github.com/ethereum/go-ethereum/eth/ethconfig"
 )
 
 func TestConfigLegacy(t *testing.T) {
@@ -15,30 +17,136 @@ func TestConfigLegacy(t *testing.T) {
 		assert.NoError(t, err)
 
 		assert.Equal(t, config, &Config{
-			DataDir: "./data",
+			Chain:    "mainnet",
+			Identity: Hostname(),
 			RequiredBlocks: map[string]string{
 				"a": "b",
 			},
+			LogLevel: "INFO",
+			DataDir:  "./data",
 			P2P: &P2PConfig{
-				MaxPeers: 30,
+				MaxPeers:     30,
+				MaxPendPeers: 50,
+				Bind:         "0.0.0.0",
+				Port:         30303,
+				NoDiscover:   false,
+				NAT:          "any",
+				Discovery: &P2PDiscovery{
+					V5Enabled:    false,
+					Bootnodes:    []string{},
+					BootnodesV4:  []string{},
+					BootnodesV5:  []string{},
+					StaticNodes:  []string{},
+					TrustedNodes: []string{},
+					DNS:          []string{},
+				},
+			},
+			Heimdall: &HeimdallConfig{
+				URL:     "http://localhost:1317",
+				Without: false,
 			},
+			SyncMode: "full",
+			GcMode:   "full",
+			Snapshot: true,
 			TxPool: &TxPoolConfig{
-				Locals:    []string{},
-				Rejournal: 1 * time.Hour,
-				LifeTime:  1 * time.Second,
+				Locals:       []string{},
+				NoLocals:     false,
+				Journal:      "",
+				Rejournal:    1 * time.Hour,
+				PriceLimit:   30000000000,
+				PriceBump:    10,
+				AccountSlots: 16,
+				GlobalSlots:  32768,
+				AccountQueue: 16,
+				GlobalQueue:  32768,
+				LifeTime:     1 * time.Second,
+			},
+			Sealer: &SealerConfig{
+				Enabled:   false,
+				Etherbase: "",
+				GasCeil:   20000000,
+				GasPrice:  big.NewInt(30000000000),
+				ExtraData: "",
 			},
 			Gpo: &GpoConfig{
+				Blocks:      20,
+				Percentile:  60,
 				MaxPrice:    big.NewInt(100),
 				IgnorePrice: big.NewInt(2),
 			},
-			Sealer: &SealerConfig{
-				Enabled:  false,
-				GasCeil:  20000000,
-				GasPrice: big.NewInt(30000000000),
+			JsonRPC: &JsonRPCConfig{
+				IPCDisable: false,
+				IPCPath:    "",
+				GasCap:     ethconfig.Defaults.RPCGasCap,
+				TxFeeCap:   ethconfig.Defaults.RPCTxFeeCap,
+				Http: &APIConfig{
+					Enabled: false,
+					Port:    8545,
+					Prefix:  "",
+					Host:    "localhost",
+					API:     []string{"eth", "net", "web3", "txpool", "bor"},
+					Cors:    []string{"*"},
+					VHost:   []string{"*"},
+				},
+				Ws: &APIConfig{
+					Enabled: false,
+					Port:    8546,
+					Prefix:  "",
+					Host:    "localhost",
+					API:     []string{"web3", "net"},
+					Cors:    []string{"*"},
+					VHost:   []string{"*"},
+				},
+				Graphql: &APIConfig{
+					Enabled: false,
+					Cors:    []string{"*"},
+					VHost:   []string{"*"},
+				},
+			},
+			Ethstats: "",
+			Telemetry: &TelemetryConfig{
+				Enabled:               false,
+				Expensive:             false,
+				PrometheusAddr:        "",
+				OpenCollectorEndpoint: "",
+				InfluxDB: &InfluxDBConfig{
+					V1Enabled:    false,
+					Endpoint:     "",
+					Database:     "",
+					Username:     "",
+					Password:     "",
+					Tags:         map[string]string{},
+					V2Enabled:    false,
+					Token:        "",
+					Bucket:       "",
+					Organization: "",
+				},
 			},
 			Cache: &CacheConfig{
-				Cache:     1024,
-				Rejournal: 1 * time.Hour,
+				Cache:         1024,
+				PercDatabase:  50,
+				PercTrie:      15,
+				PercGc:        25,
+				PercSnapshot:  10,
+				Journal:       "triecache",
+				Rejournal:     1 * time.Hour,
+				NoPrefetch:    false,
+				Preimages:     false,
+				TxLookupLimit: 2350000,
+			},
+			Accounts: &AccountsConfig{
+				Unlock:              []string{},
+				PasswordFile:        "",
+				AllowInsecureUnlock: false,
+				UseLightweightKDF:   false,
+				DisableBorWallet:    false,
+			},
+			GRPC: &GRPCConfig{
+				Addr: ":3131",
+			},
+			Developer: &DeveloperConfig{
+				Enabled: false,
+				Period:  0,
 			},
 		})
 	}