diff --git a/config/config.go b/config/config.go
index 00da90755..e0a001150 100644
--- a/config/config.go
+++ b/config/config.go
@@ -20,7 +20,6 @@ import (
 	"time"
 
 	"github.com/btcsuite/go-socks/socks"
-	"github.com/daglabs/btcd/connmgr"
 	"github.com/daglabs/btcd/dagconfig"
 	"github.com/daglabs/btcd/dagconfig/daghash"
 	"github.com/daglabs/btcd/database"
@@ -126,6 +125,7 @@ type configFlags struct {
 	DisableRPC           bool          `long:"norpc" description:"Disable built-in RPC server -- NOTE: The RPC server is disabled by default if no rpcuser/rpcpass or rpclimituser/rpclimitpass is specified"`
 	DisableTLS           bool          `long:"notls" description:"Disable TLS for the RPC server -- NOTE: This is only allowed if the RPC server is bound to localhost"`
 	DisableDNSSeed       bool          `long:"nodnsseed" description:"Disable DNS seeding for peers"`
+	DNSSeed              string        `long:"dnsseed" description:"Override DNS seeds with specified hostname (Only 1 hostname allowed)"`
 	ExternalIPs          []string      `long:"externalip" description:"Add an ip to the list of local addresses we claim to listen on to peers"`
 	Proxy                string        `long:"proxy" description:"Connect via SOCKS5 proxy (eg. 127.0.0.1:9050)"`
 	ProxyUser            string        `long:"proxyuser" description:"Username for proxy server"`
@@ -907,7 +907,7 @@ func loadConfig() (*Config, []string, error) {
 		// onion-specific proxy configured.
 		if !cfg.NoOnion && cfg.OnionProxy == "" {
 			cfg.Lookup = func(host string) ([]net.IP, error) {
-				return connmgr.TorLookupIP(host, cfg.Proxy)
+				return network.TorLookupIP(host, cfg.Proxy)
 			}
 		}
 	}
@@ -953,7 +953,7 @@ func loadConfig() (*Config, []string, error) {
 		// onion-specific proxy.
 		if cfg.Proxy != "" {
 			cfg.Lookup = func(host string) ([]net.IP, error) {
-				return connmgr.TorLookupIP(host, cfg.OnionProxy)
+				return network.TorLookupIP(host, cfg.OnionProxy)
 			}
 		}
 	} else {
diff --git a/connmgr/seed.go b/connmgr/seed.go
index d112fe84b..d119d7c61 100644
--- a/connmgr/seed.go
+++ b/connmgr/seed.go
@@ -11,6 +11,7 @@ import (
 	"strconv"
 	"time"
 
+	"github.com/daglabs/btcd/config"
 	"github.com/daglabs/btcd/util/subnetworkid"
 
 	"github.com/daglabs/btcd/dagconfig"
@@ -41,7 +42,15 @@ type LookupFunc func(string) ([]net.IP, error)
 func SeedFromDNS(dagParams *dagconfig.Params, reqServices wire.ServiceFlag, includeAllSubnetworks bool,
 	subnetworkID *subnetworkid.SubnetworkID, lookupFn LookupFunc, seedFn OnSeed) {
 
-	for _, dnsseed := range dagParams.DNSSeeds {
+	var dnsSeeds []string
+	configSeed := config.MainConfig().DNSSeed
+	if configSeed != "" {
+		dnsSeeds = []string{configSeed}
+	} else {
+		dnsSeeds = dagParams.DNSSeeds
+	}
+
+	for _, dnsseed := range dnsSeeds {
 		var host string
 		if reqServices == wire.SFNodeNetwork {
 			host = dnsseed
diff --git a/docker/Dockerfile b/docker/Dockerfile
index 804a27b87..b2b430065 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -44,6 +44,7 @@ RUN apk add --no-cache ca-certificates tini
 COPY --from=build /go/src/github.com/daglabs/btcd/btcd /app/
 COPY --from=build /go/src/github.com/daglabs/btcd/docker/rpc.cert /app/
 COPY --from=build /go/src/github.com/daglabs/btcd/docker/rpc.key /app/
+COPY --from=build /go/src/github.com/daglabs/btcd/sample-btcd.conf /app/
 
 USER nobody
 ENTRYPOINT [ "/sbin/tini", "--" ]
diff --git a/connmgr/tor.go b/util/network/tor.go
similarity index 99%
rename from connmgr/tor.go
rename to util/network/tor.go
index 2b22ae51f..409bf3997 100644
--- a/connmgr/tor.go
+++ b/util/network/tor.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
-package connmgr
+package network
 
 import (
 	"encoding/binary"