ASA5505 - VPN does not
Hello everyone,
I have problems to make IPsec VPN remote access work.
The goal is to be able to connect to our internal network from home or elsewhere.
When I try to connect to my home virtual private network, I will no further than Phase 1.
My architecture is a Cisco ASA5505 behind a router-modem router from ISP. The IP address of the modem is 192.168.1.1 for outside.
The IP address of the ASA is 192.168.1.254 for outdoor and 10.0.0.1 for indoors. I put the ASA in a demilitarized zone of the ISP modem to be able to reach it through the Internet (I wanted to use the ISP modem-router-bridge just as a simple gateway and handle other things with the ASA).
So my problem is that I can't seem to connect to the VPN through the public IP address.
Here is my config:
: Saved
:
ASA Version 8.2(5)
!
hostname Cisco-ASA-5505
enable password 8Ry2YjIyt7RRXU24 encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
names
!
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 10.0.0.1 255.255.255.0
!
interface Vlan2
nameif outside
security-level 0
ip address 192.168.1.254 255.255.255.0
!
ftp mode passive
clock timezone GMT 1
access-list NONAT extended permit ip 10.0.0.0 255.255.255.0 10.0.1.0 255.255.255.0
pager lines 24
logging asdm informational
mtu inside 1500
mtu outside 1500
ip local pool VPNpool 10.0.1.1-10.0.1.50
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 0.0.0.0 0.0.0.0
route outside 0.0.0.0 0.0.0.0 192.168.1.1 1
route inside 192.168.2.0 255.255.255.0 10.0.0.42 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
aaa authentication ssh console LOCAL
http server enable
http 192.168.1.0 255.255.255.0 inside
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
crypto ipsec transform-set RA-TS esp-aes-256 esp-sha-hmac
crypto ipsec security-association lifetime seconds 28800
crypto ipsec security-association lifetime kilobytes 4608000
crypto dynamic-map DYN-MAP 10 set transform-set RA-TS
crypto map VPN-MAP 30 ipsec-isakmp dynamic DYN-MAP
crypto map VPN-MAP interface outside
crypto isakmp enable outside
crypto isakmp policy 20
authentication pre-share
encryption aes-256
hash sha
group 2
lifetime 3600
telnet timeout 5
ssh 192.168.1.0 255.255.255.0 inside
ssh 10.0.0.0 255.255.255.0 inside
ssh timeout 5
console timeout 0
dhcpd address 10.0.0.10-10.0.0.40 inside
dhcpd dns 81.253.149.9 80.10.246.1 interface inside
dhcpd update dns both override interface inside
dhcpd enable inside
!
threat-detection basic-threat
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
tftp-server inside 10.0.0.42 /srv/tftp/cisco-rtr-01-config
webvpn
username admin password 4RdDnLO1w2ilihWc encrypted
username test password zGOnThs6HPdiZhqs encrypted
tunnel-group testvpn type remote-access
tunnel-group testvpn general-attributes
address-pool VPNpool
tunnel-group testvpn ipsec-attributes
pre-shared-key *****
!
!
prompt hostname context
no call-home reporting anonymous
Cryptochecksum:c3d233f44e742110aa0ce1f81173d47c
: end
My config to the client is attached.
When I look at what happened during the connectin with Wireshark, I see 'Port Unreachable '. I have to do something on my ISP router? Because I read that it is not necessary to use NAT if the device is in the demilitarized zone.
Can you help me please?
Because you have the address on your external interface, you will need to tell your router to forward traffic to ASA. So you can do NAT or port forward to ASA.
I guess you don't have a single address public IP assigned by your ISP.
Kind regards
Jan
Tags: Cisco Security
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7-restart the machine.
(8) to disable any firewall if not installed.
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