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VPN drop when Dynamic IP change


Hi all,

  I verified that the VPN implemented between a static IP address and a dynamic IP address every  time the GPRS router IP address change address, the VPN does not rise.

I attach the configuration implemented by ASA5505 dynamic side.

How can I fix it?

: Saved

: Written by enable_15 at 06:45:34.029 UTC Sat Dec 3 2011


ASA Version 8.2(1)


hostname ASA2




interface Vlan1

no nameif

no security-level

no ip address


interface Vlan2

nameif outside

security-level 0

ip address


interface Vlan3

nameif inside

security-level 100

ip address


interface Ethernet0/0

switchport access vlan 2


interface Ethernet0/1

switchport access vlan 3


interface Ethernet0/2

switchport access vlan 3


interface Ethernet0/3



interface Ethernet0/4



interface Ethernet0/5



interface Ethernet0/6



interface Ethernet0/7



ftp mode passive

access-list l2l_list extended permit ip

access-list nonat extended permit ip

access-list nonat extended permit ip

access-list PingDebug extended permit icmp any any

pager lines 24

mtu outside 1500

mtu inside 1500

ip local pool vpnpool mask

no failover

icmp unreachable rate-limit 1 burst-size 1

no asdm history enable

arp timeout 14400

global (outside) 1 interface

nat (inside) 0 access-list nonat

nat (inside) 1

access-group PingDebug in interface outside

route outside 1

timeout xlate 3:00:00

timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02

timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00

timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00

timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute

timeout tcp-proxy-reassembly 0:01:00

dynamic-access-policy-record DfltAccessPolicy

aaa authentication ssh console LOCAL

no snmp-server location

no snmp-server contact

snmp-server enable traps snmp authentication linkup linkdown coldstart

crypto ipsec transform-set FirstSet esp-3des esp-md5-hmac

crypto ipsec security-association lifetime seconds 28800

crypto ipsec security-association lifetime kilobytes 4608000

crypto map abcmap 1 match address l2l_list

crypto map abcmap 1 set peer STATIC-IP-ADDRESS

crypto map abcmap 1 set transform-set FirstSet

crypto map abcmap interface outside

crypto isakmp enable outside

crypto isakmp policy 1

authentication pre-share

encryption 3des

hash sha

group 2

lifetime 43200

telnet timeout 5

ssh timeout 5

console timeout 0

threat-detection basic-threat

threat-detection statistics access-list

no threat-detection statistics tcp-intercept


enable outside

svc image disk0:/anyconnect-win-2.4.1012-k9.pkg 1

svc enable

group-policy DfltGrpPolicy attributes

vpn-tunnel-protocol IPSec svc webvpn

address-pools value vpnpool


tunnel-group STATIC-IP-ADDRESS type ipsec-l2l

tunnel-group STATIC-IP-ADDRESS ipsec-attributes

pre-shared-key ...


class-map inspection_default

match default-inspection-traffic



policy-map type inspect dns preset_dns_map


  message-length maximum 512

policy-map global_policy

class inspection_default

  inspect dns preset_dns_map

  inspect ftp

  inspect h323 h225

  inspect h323 ras

  inspect netbios

  inspect rsh

  inspect rtsp

  inspect skinny 

  inspect esmtp

  inspect sqlnet

  inspect sunrpc

  inspect tftp

  inspect sip 

  inspect xdmcp


service-policy global_policy global

prompt hostname context


: end

Best Regards