01-30-2014 09:25 AM - edited 02-21-2020 07:28 PM
I have a customer that has a remote office with 2 PCs that VPN in to their HQ location. Previously both PCs where at different locations now they are at the same location. Both PCs are able to successfully establish a VPN connection to HQ using the Cisco VPN Client Version 5.0.07.0290, but only 1 system is actually passing traffic and is able to access resources at HQ.
I asked another engineer and they said "you have to configure IPSEC over TCP or use Anyconnect to have multiple clients behind the same remote PAT'ed public ip address...". I'd like to go with the IPSEC over TCP route so I won't have to uninstall the old client and go through the process of installing the AnyConnect client. Below is the configuration of the ASA 5505 thanks in advance for any help.
CLIENTASA# sh run
: Saved
:
ASA Version 7.2(4)
!
hostname CLIENTASA
domain-name client.local
enable password 72LucMgVuxp5I3Ox encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
names
!
interface Vlan1
nameif inside
security-level 100
ip address 192.168.1.1 255.255.255.0
!
interface Vlan2
nameif outside
security-level 0
ip address x.x.x.x x.x.x.x
!
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
!
ftp mode passive
dns server-group DefaultDNS
domain-name client.local
access-list SPLIT-TUNNEL standard permit 192.168.1.0 255.255.255.0
access-list outside_in extended permit tcp any any eq smtp
access-list outside_in extended permit tcp any any eq www
access-list outside_in extended permit tcp any any eq https
access-list nonat extended permit ip 192.168.1.0 255.255.255.0 10.99.99.0 255.255.255.0
pager lines 24
logging enable
logging console debugging
logging buffered debugging
logging asdm informational
mtu inside 1500
mtu outside 1500
ip local pool VPN-POOL 10.99.99.100-10.99.99.200
icmp unreachable rate-limit 1 burst-size 1
asdm image disk0:/asdm-523.bin
no asdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 0 access-list nonat
nat (inside) 1 192.168.1.0 255.255.255.0
nat (inside) 1 0.0.0.0 0.0.0.0
static (inside,outside) tcp interface www 192.168.1.2 www netmask 255.255.255.255
static (inside,outside) tcp interface https 192.168.1.2 https netmask 255.255.255.255
static (inside,outside) tcp interface smtp 192.168.1.2 smtp netmask 255.255.255.255
access-group outside_in in interface outside
route outside 0.0.0.0 0.0.0.0 x.x.x.x 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
aaa authentication enable console LOCAL
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 esp-3des esp-des esp-md5-hmac
crypto dynamic-map VPNDYN 1 set transform-set esp-3des
crypto map vpn 65535 ipsec-isakmp dynamic VPNDYN
crypto map vpn interface outside
crypto isakmp enable outside
crypto isakmp policy 100
authentication pre-share
encryption des
hash md5
group 2
lifetime 86400
crypto isakmp policy 65535
authentication pre-share
encryption des
hash sha
group 2
lifetime 86400
telnet 0.0.0.0 0.0.0.0 inside
telnet timeout 5
ssh 0.0.0.0 0.0.0.0 inside
ssh 0.0.0.0 0.0.0.0 outside
ssh timeout 5
console timeout 0
dhcpd dns 192.168.1.2
dhcpd auto_config outside
!
ssl encryption des-sha1 rc4-md5
group-policy VPN-POLICY internal
group-policy VPN-POLICY attributes
dns-server value 192.16.1.2
split-tunnel-policy tunnelspecified
split-tunnel-network-list value SPLIT-TUNNEL
username admin password PWpqnmc2BqJP9Qrb encrypted privilege 15
username vpn2 password ZBNuNQsIyyMGbOB2 encrypted
username vpn3 password 15c4LrPNccaj1Ufr encrypted
username vpn1 password fsQgwXwSLokX6hEU encrypted
tunnel-group CLIENTVPN type ipsec-ra
tunnel-group CLIENTVPN general-attributes
address-pool VPN-POOL
default-group-policy VPN-POLICY
tunnel-group CLIENTVPN ipsec-attributes
pre-shared-key *
!
class-map inspection_default
match default-inspection-traffic
!
!
policy-map type inspect dns preset_dns_map
parameters
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 rsh
inspect rtsp
inspect esmtp
inspect sqlnet
inspect skinny
inspect sunrpc
inspect xdmcp
inspect sip
inspect netbios
inspect tftp
!
service-policy global_policy global
prompt hostname context
Cryptochecksum:41bd95c164a63bb26b01c109ab1bd68a
: end
CLIENTASA#
Solved! Go to Solution.
01-30-2014 09:35 AM
Hi,
You could try adding
crypto isakmp nat-traversal 30
And testing the connections
To use TCP I think you only need to add
crypto isakmp ipsec-over-tcp 10000
You will also have to change the Transparent tunneling setting on the VPN Client software profile to use TCP instead of the NAT/PAT option.
- Jouni
01-30-2014 09:35 AM
Hi,
You could try adding
crypto isakmp nat-traversal 30
And testing the connections
To use TCP I think you only need to add
crypto isakmp ipsec-over-tcp 10000
You will also have to change the Transparent tunneling setting on the VPN Client software profile to use TCP instead of the NAT/PAT option.
- Jouni
01-30-2014 11:11 AM
Thanks for the help JouniForss. The command crypto isakmp nat-traversal 30 was all that I needed to enter.
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