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Jack G

Site to Site VPN with dynamic IP issues

I have to ASA 5505 at each location. Using the VPN wizard, I can get a site to site working fine with existing addresses, but how do I modifiy the configuration since the remote office has a dynamic public IP address?  I tried to delete the cypto map and make an dynamic crypto map but it's just not working.  If there a configuration guide for this using the ASDM?  Any help would be great.


Hi Jack,

Configure below commands on 1st ASA as static ip.

crypto map outside_map 1 set peer 192.168.x.x

and where you have dynamic IP confgure this commands

crypto map outside_map 1 set peer asa5505 dynamic default

or else which commands are applying that its not working.

Let me know if you need any further information.



Isn't this reversed? Wouldn't I want the ASA with the static to have the dynamic crypto map: crypto map outside_map 1 set peer asa5505 dynamic default ?

Here's my broken configuration of the staticly assigned ASA:

Result of the command: "show run"

: Saved
ASA Version 8.2(5)
hostname asa1
enable password 8Ry2YjIyt7RRXU24 encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
interface Ethernet0/0
switchport access vlan 2
interface Ethernet0/1
interface Ethernet0/2
interface Ethernet0/3
interface Ethernet0/4
interface Ethernet0/5
interface Ethernet0/6
interface Ethernet0/7
interface Vlan1
nameif inside
security-level 100
ip address
interface Vlan2
nameif outside
security-level 0
ip address
interface Vlan5
no nameif
security-level 50
ip address dhcp
ftp mode passive
access-list outside_cryptomap_65535.1 extended permit ip
access-list inside_nat0_outbound extended permit ip
pager lines 24
logging enable
logging asdm informational
mtu inside 1500
mtu outside 1500
icmp unreachable rate-limit 1 burst-size 1
no asdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 0 access-list inside_nat0_outbound
nat (inside) 1
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
timeout floating-conn 0:00:00
dynamic-access-policy-record DfltAccessPolicy
http server enable
http inside
http inside
http outside
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
crypto ipsec transform-set ESP-AES-128-SHA esp-aes esp-sha-hmac
crypto ipsec transform-set ESP-AES-128-MD5 esp-aes esp-md5-hmac
crypto ipsec transform-set ESP-AES-192-SHA esp-aes-192 esp-sha-hmac
crypto ipsec transform-set ESP-AES-192-MD5 esp-aes-192 esp-md5-hmac
crypto ipsec transform-set ESP-AES-256-SHA esp-aes-256 esp-sha-hmac
crypto ipsec transform-set ESP-AES-256-MD5 esp-aes-256 esp-md5-hmac
crypto ipsec transform-set ESP-3DES-MD5 esp-3des esp-md5-hmac
crypto ipsec transform-set ESP-DES-SHA esp-des esp-sha-hmac
crypto ipsec transform-set ESP-DES-MD5 esp-des esp-md5-hmac
crypto ipsec transform-set ESP-3DES-SHA esp-3des esp-sha-hmac
crypto ipsec security-association lifetime seconds 28800
crypto ipsec security-association lifetime kilobytes 4608000
crypto dynamic-map outside_dyn_map 1 match address outside_cryptomap_65535.1
crypto dynamic-map outside_dyn_map 1 set pfs
crypto dynamic-map outside_dyn_map 1 set transform-set ESP-3DES-SHA
crypto map outside_map 65535 ipsec-isakmp dynamic outside_dyn_map
crypto map outside_map interface outside
crypto isakmp enable outside
crypto isakmp policy 10
authentication pre-share
encryption 3des
hash sha
group 2
lifetime 86400
telnet timeout 5
ssh timeout 5
console timeout 0
dhcpd auto_config outside
dhcpd address inside
dhcpd enable inside

threat-detection basic-threat
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
tunnel-group type ipsec-l2l
tunnel-group ipsec-attributes
pre-shared-key *****
prompt hostname context
call-home reporting anonymous prompt 2
: end

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