diff --git a/README.md b/README.md
index c4e2c81..88e8020 100644
--- a/README.md
+++ b/README.md
@@ -219,7 +219,7 @@ Available forward strategies:
   rr: Round Robin mode
   ha: High Availability mode
   lha: Latency based High Availability mode
-  dh: destination hashing mode
+  dh: Destination Hashing mode
 
 Forwarder option scheme: FORWARD_URL#OPTIONS
   priority: set the priority of that forwarder, default:0
diff --git a/conf.go b/conf.go
index c3f855d..a5021da 100644
--- a/conf.go
+++ b/conf.go
@@ -191,7 +191,7 @@ func usage() {
 	fmt.Fprintf(os.Stderr, "  rr: Round Robin mode\n")
 	fmt.Fprintf(os.Stderr, "  ha: High Availability mode\n")
 	fmt.Fprintf(os.Stderr, "  lha: Latency based High Availability mode\n")
-	fmt.Fprintf(os.Stderr, "  dh: destination hashing mode\n")
+	fmt.Fprintf(os.Stderr, "  dh: Destination Hashing mode\n")
 	fmt.Fprintf(os.Stderr, "\n")
 
 	fmt.Fprintf(os.Stderr, "Forwarder option scheme: FORWARD_URL#OPTIONS\n")
diff --git a/config/glider.conf.example b/config/glider.conf.example
index 701d33e..1449f11 100644
--- a/config/glider.conf.example
+++ b/config/glider.conf.example
@@ -60,12 +60,22 @@ listen=socks5://:1080
 # Forwarders, we can setup multiple forwarders.
 # forward=SCHEME#OPTIONS
 
+# FORWARDER OPTIONS
+# priority: set the priority of that forwarder, default:0
+# interface: set local interface or ip address used to connect remote server
+
 # Socks5 proxy as forwarder
 # forward=socks5://192.168.1.10:1080
 
 # Socks5 proxy as forwarder with priority 100
 # forward=socks5://192.168.1.10:1080#priority=100
 
+# Socks5 proxy as forwarder with priority 100 and use `eth0` as source interface
+# forward=socks5://192.168.1.10:1080#priority=100&interface=eth0
+
+# Socks5 proxy as forwarder with priority 100 and use `192.168.1.100` as source ip
+# forward=socks5://192.168.1.10:1080#priority=100&interface=192.168.1.100
+
 # SS proxy as forwarder
 # forward=ss://method:pass@1.1.1.1:8443
 
diff --git a/ipset/ipset_linux.go b/ipset/ipset_linux.go
index 1b55268..b19d6c0 100644
--- a/ipset/ipset_linux.go
+++ b/ipset/ipset_linux.go
@@ -14,9 +14,8 @@ import (
 	"syscall"
 	"unsafe"
 
-	"github.com/nadoo/glider/rule"
-
 	"github.com/nadoo/glider/common/log"
+	"github.com/nadoo/glider/rule"
 )
 
 // NFNL_SUBSYS_IPSET netfilter netlink message types
diff --git a/strategy/strategy.go b/strategy/strategy.go
index b97b16a..3fa9439 100644
--- a/strategy/strategy.go
+++ b/strategy/strategy.go
@@ -155,6 +155,7 @@ func (d *Dialer) initAvailable() {
 	}
 
 	if len(d.available) == 0 {
+		log.F("[strategy] no available forwarders, just use: %s, please check your settings or network", d.fwdrs[0])
 		d.available = append(d.available, d.fwdrs[0])
 	}
 }
@@ -239,14 +240,17 @@ func (d *Dialer) check(i int) {
 	}
 }
 
+// Round Robin
 func (d *Dialer) scheduleRR(dstAddr string) *proxy.Forwarder {
 	return d.available[atomic.AddUint32(&d.index, 1)%uint32(len(d.available))]
 }
 
+// High Availability
 func (d *Dialer) scheduleHA(dstAddr string) *proxy.Forwarder {
 	return d.available[0]
 }
 
+// Latency based High Availability
 func (d *Dialer) scheduleLHA(dstAddr string) *proxy.Forwarder {
 	fwdr := d.available[0]
 	lowest := fwdr.Latency()
@@ -256,10 +260,10 @@ func (d *Dialer) scheduleLHA(dstAddr string) *proxy.Forwarder {
 			fwdr = f
 		}
 	}
-
 	return fwdr
 }
 
+// Destination Hashing
 func (d *Dialer) scheduleDH(dstAddr string) *proxy.Forwarder {
 	fnv1a := fnv.New32a()
 	fnv1a.Write([]byte(dstAddr))