76   ESR Series Routers Operation Manual 
esr# configure 
esr(config)# interface gi 1/0/1 
esr(config-if)# ip address 120.11.5.1/24 
esr(config-if)# security-zone untrusted 
esr(config-if)# exit 
Create ISAKMP port profile in order to configure security zone rules:  
esr(config)# object-group service ISAKMP 
esr(config-addr-set)# port-range 500 
esr(config-addr-set)# exit 
Create IKE profile. In the profile, specify Diffie-Hellman group as 2, encryption algorithm - AES 128 
bit, authentication algorithm - MD5. This security parameters is used for protection of IKE connection: 
esr(config)# security ike proposal ike_prop1 
esr(config-ike-proposal)# dh-group 2 
esr(config-ike-proposal)# authentication algorithm md5 
esr(config-ike-proposal)# encryption algorithm aes128 
esr(config-ike-proposal)# exit 
esr(config)# 
Create  IKE  protocol  policy. Specify  list  of  IKE  protocol  profiles,  which  can  be  used  for  nodes  and 
authentication key negotiation:   
esr(config)# security ike policy ike_pol1 
esr(config-ike-policy)# pre-shared-key hexadecimal 123FFF 
esr(config-ike-policy)# proposal ike_prop1 
esr(config-ike-policy)# exit 
Create IKE protocol gateway. In this profile, specify VTI tunnel, policy, version of protocol and traffic 
to tunnel redirection mode: 
esr(config)# security ike gateway ike_gw1 
esr(config-ike-gw)# ike-policy ike_pol1 
esr(config-ike-gw)# remote address 180.100.0.1 
esr(config-ike-gw)# remote network 10.0.0.0/16 
esr(config-ike-gw)# local address 120.11.5.1 
esr(config-ike-gw)# local network 192.0.2.0/24 
esr(config-ike-gw)# mode policy-based 
esr(config-ike-gw)# exit 
Create security parameters' profile for IPsec tunnel. For  the  profile, select AES 128  bit  encryption 
algorithm, MD5 authentication algorithm. Use the following parameters to secure IPsec tunnel: 
esr(config)# security ipsec proposal ipsec_prop1 
esr(config-ipsec-proposal)# authentication algorithm md5 
esr(config-ipsec-proposal)# encryption algorithm aes128 
esr(config-ipsec-proposal)# exit 
Create  policy  for  IPsec tunnel.  For  the policy, specify the  list  of IPsec tunnel profiles that may  be 
used for node negotiation: 
esr(config)# security ipsec policy ipsec_pol1 
esr(config-ipsec-policy)# proposal ipsec_prop1 
esr(config-ipsec-policy)# exit 
Create IPsec VPN. For VPN, specify IKE  protocol gateway, IPsec tunnel  policy, key exchange mode 
and  connection  establishment  method.  When  all  parameters  are  entered,  enable  tunnel  using  enable 
command.