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Guest · Posted: Mon Dec 05, 2005 9:21 am Post subject: NAT question for Cisco 851 router

I am attempting to configure a Cisco 851 router in a small office
environment.

I've configured an Easy VPN Server, to which I can connect with Cisco
VPN client w/ no problem. Once connected with the client, I can SSH to
the router without problems.

What I have not been able to do is connect to an internal server
running terminal services (TCP port 3389) from a connected VPN client.
The internal server address is 192.168.1.2.

I don't understand the NAT route map, since it seems to prohibit
traffic from the local subnet to the clients that are assigned
addresses from the VPN pool.

Please help!!!

Following is my startup configuration:

!This is the running config of the router: 192.168.1.1
!----------------------------------------------------------------------------
!version 12.3
no service pad
service tcp-keepalives-in
service tcp-keepalives-out
service timestamps debug datetime msec localtime show-timezone
service timestamps log datetime msec localtime show-timezone
service password-encryption
service sequence-numbers
!
hostname esirouter
!
boot-start-marker
boot-end-marker
!
logging buffered 51200 debugging
logging console critical
enable secret 5 $1$wk71$tHaNxneJDZrhuFHvLgb8Q0
!
username administrator privilege 15 secret 5
$1$qB7W$USua9BNt7dmgSp0iZBEL//
username dmasters privilege 15 secret 5 $1$rEkL$W5VSbsT5Lg.30m1GWjyvN/
clock timezone PCTime -5
clock summer-time PCTime date Apr 6 2003 2:00 Oct 26 2003 2:00
aaa new-model
!
!
aaa authentication login default local
aaa authentication login sdm_vpn_xauth_ml_1 local
aaa authorization exec default local
aaa authorization network sdm_vpn_group_ml_1 local
aaa session-id common
ip subnet-zero
no ip source-route
ip dhcp excluded-address 192.168.1.1 192.168.1.99
!
ip dhcp pool sdm-pool1
import all
network 192.168.1.0 255.255.255.0
default-router 192.168.1.1
!
!
ip cef
ip inspect name DEFAULT100 cuseeme
ip inspect name DEFAULT100 ftp
ip inspect name DEFAULT100 h323
ip inspect name DEFAULT100 icmp
ip inspect name DEFAULT100 rcmd
ip inspect name DEFAULT100 realaudio
ip inspect name DEFAULT100 rtsp
ip inspect name DEFAULT100 esmtp
ip inspect name DEFAULT100 sqlnet
ip inspect name DEFAULT100 streamworks
ip inspect name DEFAULT100 tftp
ip inspect name DEFAULT100 tcp
ip inspect name DEFAULT100 udp
ip inspect name DEFAULT100 vdolive
ip tcp synwait-time 10
no ip bootp server
no ip domain lookup
ip domain name easternscientificinc.com
ip ssh time-out 60
ip ssh authentication-retries 2
no ftp-server write-enable
!
!
!
!
!
crypto isakmp policy 1
encr 3des
authentication pre-share
group 2
!
crypto isakmp policy 3
encr 3des
group 2
!
crypto isakmp client configuration group esivpnmain
key erlight822!
dns 192.168.1.2
pool VPNPOOL
acl 102
save-password
max-logins 5
!
!
crypto ipsec transform-set ESP-3DES-SHA esp-3des esp-sha-hmac
!
crypto dynamic-map SDM_DYNMAP_1 1
set transform-set ESP-3DES-SHA
reverse-route
!
!
crypto map SDM_CMAP_1 client authentication list sdm_vpn_xauth_ml_1
crypto map SDM_CMAP_1 isakmp authorization list sdm_vpn_group_ml_1
crypto map SDM_CMAP_1 client configuration address respond
crypto map SDM_CMAP_1 65535 ipsec-isakmp dynamic SDM_DYNMAP_1
!
!
!
interface FastEthernet0
no ip address
no cdp enable
!
interface FastEthernet1
no ip address
no cdp enable
!
interface FastEthernet2
no ip address
no cdp enable
!
interface FastEthernet3
no ip address
no cdp enable
!
interface FastEthernet4
description $ES_WAN$$FW_OUTSIDE$$ETH-WAN$
ip address dhcp client-id FastEthernet4
ip access-group 101 in
no ip redirects
no ip unreachables
no ip proxy-arp
ip inspect DEFAULT100 out
ip nat outside
ip virtual-reassembly
ip route-cache flow
duplex auto
speed auto
no cdp enable
crypto map SDM_CMAP_1
!
interface Vlan1
description $ETH-SW-LAUNCH$$INTF-INFO-HWIC 4ESW$$ES_LAN$$FW_INSIDE$
ip address 192.168.1.1 255.255.255.0
ip access-group 100 in
no ip redirects
no ip unreachables
no ip proxy-arp
ip nat inside
ip virtual-reassembly
ip route-cache flow
ip tcp adjust-mss 1452
!
router rip
network 192.168.1.0
no auto-summary
!
ip local pool VPNPOOL 192.168.1.50 192.168.1.99
ip classless
!
ip http server
ip http authentication local
ip http secure-server
ip http timeout-policy idle 600 life 86400 requests 10000
ip nat inside source route-map SDM_RMAP_1 interface FastEthernet4
overload
!
logging trap debugging
access-list 1 remark INSIDE_IF=Vlan1
access-list 1 remark SDM_ACL Category=2
access-list 1 permit 192.168.1.0 0.0.0.255
access-list 100 remark auto generated by Cisco SDM Express firewall
configuration
access-list 100 remark SDM_ACL Category=1
access-list 100 deny ip host 255.255.255.255 any
access-list 100 deny ip 127.0.0.0 0.255.255.255 any
access-list 100 permit ip any any
access-list 101 remark auto generated by Cisco SDM Express firewall
configuration
access-list 101 remark SDM_ACL Category=1
access-list 101 permit ip host 192.168.1.50 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.51 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.52 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.53 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.54 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.55 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.56 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.57 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.58 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.59 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.60 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.61 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.62 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.63 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.64 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.65 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.66 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.67 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.68 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.69 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.70 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.71 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.72 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.73 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.74 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.75 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.76 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.77 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.78 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.79 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.80 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.81 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.82 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.83 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.84 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.85 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.86 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.87 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.88 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.89 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.90 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.91 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.92 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.93 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.94 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.95 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.96 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.97 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.98 192.168.1.0 0.0.0.255
access-list 101 permit ip host 192.168.1.99 192.168.1.0 0.0.0.255
access-list 101 permit udp any any eq non500-isakmp
access-list 101 permit udp any any eq isakmp
access-list 101 permit esp any any
access-list 101 permit ahp any any
access-list 101 permit udp any eq bootps any eq bootpc
access-list 101 deny ip 192.168.1.0 0.0.0.255 any
access-list 101 permit icmp any any echo-reply
access-list 101 permit icmp any any time-exceeded
access-list 101 permit icmp any any unreachable
access-list 101 deny ip 10.0.0.0 0.255.255.255 any
access-list 101 deny ip 172.16.0.0 0.15.255.255 any
access-list 101 deny ip 192.168.0.0 0.0.255.255 any
access-list 101 deny ip 127.0.0.0 0.255.255.255 any
access-list 101 deny ip host 255.255.255.255 any
access-list 101 deny ip any any
access-list 102 remark SDM_ACL Category=4
access-list 102 permit ip 192.168.1.0 0.0.0.255 any
access-list 103 remark SDM_ACL Category=2
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.50
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.51
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.52
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.53
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.54
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.55
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.56
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.57
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.58
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.59
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.60
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.61
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.62
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.63
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.64
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.65
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.66
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.67
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.68
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.69
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.70
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.71
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.72
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.73
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.74
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.75
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.76
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.77
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.78
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.79
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.80
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.81
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.82
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.83
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.84
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.85
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.86
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.87
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.88
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.89
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.90
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.91
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.92
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.93
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.94
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.95
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.96
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.97
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.98
access-list 103 deny ip 192.168.1.0 0.0.0.255 host 192.168.1.99
access-list 103 permit ip 192.168.1.0 0.0.0.255 any
no cdp run
route-map SDM_RMAP_1 permit 1
match ip address 103
!
!
control-plane
!
banner login ^CAuthorized access only!
Disconnect IMMEDIATELY if you are not an authorized user!^C
!
line con 0
no modem enable
transport preferred all
transport output telnet
line aux 0
transport preferred all
transport output telnet
line vty 0 4
transport preferred all
transport input telnet ssh
transport output all
!
scheduler max-task-time 5000
scheduler allocate 4000 1000
scheduler interval 500
end

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