古河電工ネットワーク機器の総合ブランド　ファイテルネット
古河電工
FITELnetトップ製品ラインナップイベント＆セミナーセールス＆サポート
Routing to the Future FITELnet
設定例
IPsecを使って2つのLANを接続する設定（MAINモード）
全機種対応
説明
ローカルネットワークユーザ間をIPsecで接続するための設定です。
双方向からの通信開始のため固定アドレス（numbered接続）が必要となります。
構成
コマンド設定

Router A

hostname Router_A
interface ewan 1
 ip address 100.0.0.1 255.255.255.0
exit
interface lan 1
 ip address 192.168.10.1 255.255.255.0
exit
vpn enable
vpnlog enable
interface ipsecif 1
 crypto map Router_B
exit
crypto isakmp policy 1
 authentication prekey
 group 5
 hash sha
 key ascii secret1
 negotiation-mode main
 peer-identity address 200.0.0.1
exit
crypto map Router_B 1
 match address 1
 set peer address 200.0.0.1
 set pfs group5
 set transform-set aes256-sha
exit
ipsec access-list 1 ipsec ip 192.168.10.0 0.0.0.255 192.168.20.0 0.0.0.255
ipsec transform-set aes256-sha esp-aes-256 esp-sha-hmac
ip route 200.0.0.1 255.255.255.255 100.0.0.254
ip route 192.168.20.0 255.255.255.0 connected ipsecif 1
end

Router B

hostname Router_B
interface ewan 1
 ip address 200.0.0.1 255.255.255.0
exit
interface lan 1
 ip address 192.168.20.1 255.255.255.0
exit
vpn enable
vpnlog enable
interface ipsecif 1
 crypto map Router_A
exit
crypto isakmp policy 1
 authentication prekey
 group 5
 hash sha
 key ascii secret1
 negotiation-mode main
 peer-identity address 100.0.0.1
exit
crypto map Router_A 1
 match address 1
 set peer address 100.0.0.1
 set pfs group5
 set transform-set aes256-sha
exit
ipsec access-list 1 ipsec ip 192.168.20.0 0.0.0.255 192.168.10.0 0.0.0.255
ipsec transform-set aes256-sha esp-aes-256 esp-sha-hmac
ip route 100.0.0.1 255.255.255.255 200.0.0.254
ip route 192.168.10.0 255.255.255.0 connected ipsecif 1
end
設定手順

Router A

設定内容 画面表示例
特権ユーザモードへの移行
パスワードの入力

設定情報の初期化

設定モードの変更
設定入力
































設定保存



装置再起動 		Router>enable
Enter password:
Router#
Router#clear working.cfg
Router#
Router#configure terminal
Router(config)#hostname Router_A
Router_A(config)#interface ewan 1
Router_A(config-if ewan 1)# ip address 100.0.0.1 255.255.255.0
Router_A(config-if ewan 1)#exit
Router_A(config)#interface lan 1
Router_A(config-if lan 1)# ip address 192.168.10.1 255.255.255.0
Router_A(config-if lan 1)#exit
Router_A(config)#vpn enable
Router_A(config)#vpnlog enable
Router_A(config)#interface ipsecif 1
Router_A(config-if ipsecif 1)# crypto map Router_B
Router_A(config-if ipsecif 1)#exit
Router_A(config)#crypto isakmp policy 1
Router_A(config-isakmp)# authentication prekey
Router_A(config-isakmp)# group 5
Router_A(config-isakmp)# hash sha
Router_A(config-isakmp)# key ascii secret1
Router_A(config-isakmp)# negotiation-mode main
Router_A(config-isakmp)# peer-identity address 200.0.0.1
Router_A(config-isakmp)#exit
Router_A(config)#crypto map Router_B 1
Router_A(config-crypto-map)# match address 1
Router_A(config-crypto-map)# set peer address 200.0.0.1
Router_A(config-crypto-map)# set pfs group5
Router_A(config-crypto-map)# set transform-set aes256-sha
Router_A(config-crypto-map)#exit
Router_A(config)#@ipsec ip 192.168.10.0 0.0.0.255 192.168.20.0 0.0.0.255
Router_A(config)#ipsec transform-set aes256-sha esp-aes-256 esp-sha-hmac
Router_A(config)#ip route 200.0.0.1 255.255.255.255 100.0.0.254
Router_A(config)#ip route 192.168.20.0 255.255.255.0 connected ipsecif 1
Router_A(config)#
Router_A(config)#end
Router_A#
Router_A#save SIDE-A
% saving working-config
% finished saving

Router_A#reset
Going to reset with SIDE-A.frm and SIDE-A.cfg.
Boot-back not scheduled for next boot.
Next rebooting firmware SIDE-A.frm is fine.
Are you OK to cold start?(y/n)y
※：Router Bの設定手順も同様です。
設定状態の確認

データ通信にてIPSECが確立することを確認します。
例：Router_Aより ping 192.168.20.1 source-interface lan 1を実施します。

確認内容 画面表示例
ping を実行する

ping 応答あり

 Router_A#ping 192.168.20.1 source-interface lan 1
Sending 5, 100-byte ICMP Echos to 192.168.20.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 0/10/50 ms

Router AのVPNログ情報を確認します。

確認内容 画面表示例
ログ情報の表示




vpn enable 状態

isakmp 確立状態



ipsec 確立状態
 Router_A#show vpnlog

0000 0000:00:00.00 2011/06/17 (fri) 14:10:19 0 00000000 4dd37c80
  #BOOT[V01.04(00)-053111] SIDE-A.frm SIDE-A.cfg
0001 0000:00:02.19 2011/06/17 (fri) 14:10:24 16 10000002 00000000
  vpn enabled.
0002 0000:03:28.56 2011/06/17 (fri) 14:13:50 16 10000320 00000000
  IKE SA<I> 1/- 200.0.0.1
0003 0000:03:28.56 2011/06/17 (fri) 14:13:50 16 10000320 00000000
  d629c79e53000000 12b1a4ae8b000000
0004 0000:03:28.58 2011/06/17 (fri) 14:13:50 16 10000220 00000000
  IPSEC SA<I> 1/1 200.0.0.1
0005 0000:03:28.58 2011/06/17 (fri) 14:13:50 16 10000220 00000000
  983ce6ee 5547101a

Router AのPhase1 SAの情報を確認します。

確認内容 画面表示例
Phase1 SA の情報を表示



接続状態 		Router_A#show crypto isakmp sa
ISAKMP SA
        current sa : 1

[ 1] 200.0.0.1
        <--> 100.0.0.1
    <I> Main Mode UP pre-shared key DES SHA
    Lifetime : 1000secs
    Current : 35secs,1kbytes
    mcfg config-mode: off
    mcfg addr: off
    mcfg apl-version:
    IKE Keepalive: dpd
    ICMP Keepalive: off
    release on addr-change: off

Router AのPhase2 SAの情報を確認します。

確認内容 画面表示例
Phase2 SA の情報を表示




接続状態 		Router_A#show crypto ipsec sa
IPSEC SA
       current insa : 1
       current outsa : 1

[ 1] 192.168.20.0,255.255.255.0 ALL ALL
                <--> 192.168.10.0,255.255.255.0 ALL ALL
     peer: 200.0.0.1

     <I> UP   ESP AES(256bits) HMAC-SHA PFS:on(group5)
     Lifetime: 600secs
     Anti-Replay: Enable
     O-SPI: 0x983ce6ee        Current: 49secs,1kbytes
      out packet     : 5            error packet      : 0
     I-SPI: 0x5547101a        Current: 49secs,1kbytes
      in packet      : 5            auth packet       : 5
      decrypt packet : 5            discard packet    : 0
      replay packet  : 0            auth error packet : 0

Router Aのルーティング情報を確認します。

確認内容 画面表示例
ルーティング情報を表示










IPSECIF1 の経路確認 		Router_A#show ip route
Max entry: 10000 (Commonness in IPv4 and IPv6)
Active entry:5 (IPv4), 2 (IPv6) Peak:5

Codes: K - kernel route, C - connected, S - static, R - RIP, O - OSPF
       B - BGP, I - IKE, U - SA-UP, D - REDUNDANCY, E - EventAction
       A - AutoConfig, > - selected route, * - FIB route, p - stale info.

C> * 100.0.0.0/24 is directly connected, EWAN1
C> * 127.0.0.0/8 is directly connected, LOOP0
C> * 192.168.10.0/24 is directly connected, LAN
S> * 192.168.20.0/24 [0/0] is directly connected, IPSECIF1
S> * 200.0.0.1/32 [1/0] via 100.0.0.254, EWAN1

Router BのVPNログ情報を確認します。

確認内容 画面表示例
ログ情報の表示




vpn enable 状態





isakmp 確立状態



ipsec 確立状態
 Router_B#show vpnlog

0000 0000:00:00.00 2011/06/17 (fri) 14:10:22 0 00000000 4dd37c80
  #BOOT[V01.04(00)-053111] SIDE-A.frm SIDE-A.cfg
0001 0000:00:02.04 2011/06/17 (fri) 14:10:26 16 10000002 00000000
  vpn enabled.
0002 0000:03:28.35 2011/06/17 (fri) 14:13:53 16 100003a8 00000000
  Recv INIT IKE SA 1/- 100.0.0.1
0003 0000:03:28.35 2011/06/17 (fri) 14:13:53 16 100003a8 00000000
  d629c79e53000000 12b1a4ae8b000000
0004 0000:03:28.35 2011/06/17 (fri) 14:13:53 16 10000320 00000000
  IKE SA<R> 1/- 100.0.0.1
0005 0000:03:28.35 2011/06/17 (fri) 14:13:53 16 10000320 00000000
  d629c79e53000000 12b1a4ae8b000000
0006 0000:03:28.36 2011/06/17 (fri) 14:13:53 16 10000220 00000000
  IPSEC SA<R> 1/1 100.0.0.1
0007 0000:03:28.36 2011/06/17 (fri) 14:13:53 16 10000220 00000000
  5547101a 983ce6ee

Router BのPhase1 SAの情報を確認します。

確認内容 画面表示例
Phase1 SA の情報を表示



接続状態 		Router_B#show crypto isakmp sa
ISAKMP SA
         current sa : 1

[ 1] 100.0.0.1
         <--> 200.0.0.1
     <R> Main Mode UP pre-shared key DES SHA
     Lifetime : 1000secs
     Current : 120secs,1kbytes
     mcfg config-mode: off
     mcfg addr: off
     mcfg apl-version:
     IKE Keepalive: dpd
     ICMP Keepalive: off
     release on addr-change: off

Router BのPhase2 SAの情報を確認します。

確認内容 画面表示例
Phase2 SA の情報を表示




接続状態 		Router_B#show crypto ipsec sa
IPSEC SA
       current insa : 1
       current outsa : 1

[ 1] 192.168.10.0,255.255.255.0 ALL ALL
                <--> 192.168.20.0,255.255.255.0 ALL ALL
peer: 100.0.0.1

     <R> UP   ESP AES(256bits) HMAC-SHA PFS:on(group5)
     Lifetime: 600secs
     Anti-Replay: Enable
     O-SPI: 0x5547101a        Current: 132secs,1kbytes
      out packet    : 5             error packet       : 0
     I-SPI: 0x983ce6ee        Current: 132secs,1kbytes
      in packet      : 5             auth packet       : 5
      decrypt packet : 5             discard packet    : 0
      replay packet  : 0             auth error packet : 0

Router Bのルーティング情報を確認します。

確認内容 画面表示例
ルーティング情報を表示






IPSECIF1 の経路確認 		Router_B#show ip route
Max entry: 10000 (Commonness in IPv4 and IPv6)
Active entry:5 (IPv4), 2 (IPv6) Peak:5

Codes: K - kernel route, C - connected, S - static, R - RIP, O - OSPF
       B - BGP, I - IKE, U - SA-UP, D - REDUNDANCY, E - EventAction
       A - AutoConfig, > - selected route, * - FIB route, p - stale info.

S> * 100.0.0.1/32 [1/0] via 200.0.0.254, EWAN1
C> * 127.0.0.0/8 is directly connected, LOOP0
S> * 192.168.10.0/24 [0/0] is directly connected, IPSECIF1
C> * 192.168.20.0/24 is directly connected, LAN
C> * 200.0.0.0/24 is directly connected, EWAN1

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