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test internet connection failed to mail server in cisco 800 series

test internet connection failed to mail server in cisco 800 series

test internet connection failed to mail server in cisco 800 series

Im sorry for more post this topic
but really from 3 week i cannot found answer in internet
I have mail server using to send and receive emails in server only mode

and i use router cisco 800 series as gateway to mail server

inside my network

mail server take ip

router cisco

public ip for mail server is and port 25 is open in it

i do nat from outside public ip to inside local netork mail server

but no access for internet to mail server

I check every thing in my network every thing is ok

but remaining i not check cisco router 800 series config file

config file as following :


xxxx#sh run
Building configuration...

Current configuration : 4660 bytes

version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption

hostname xxxxx


aaa new-model

aaa authentication login default local
aaa authentication login sdm_vpn_xauth_ml_1 local
aaa authentication login sdm_vpn_xauth_ml_2 local
aaa authorization exec default local
aaa authorization network sdm_vpn_group_ml_1 local

aaa session-id common
clock timezone KSA 3

crypto pki trustpoint TP-self-signed-xxxxx
enrollment selfsigned
subject-name cn=IOS-Self-Signed-Certificate-164429193
revocation-check none
rsakeypair TP-self-signed-xxxx

dot11 syslog

dot11 ssid xxxx
vlan 1
authentication open
authentication key-management wpa
wpa-psk ascii 0 xxxx

ip cef
no ip dhcp use vrf connected
ip dhcp excluded-address
ip dhcp excluded-address

ip dhcp pool wireless
import all
lease 0 2

ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
ip domain name awalnet.net.sa
ip name-server
ip name-server


crypto isakmp policy 1
encr 3des
authentication pre-share
group 2

crypto isakmp client configuration group xxx
key xxx
dhcp server
max-users 10
crypto xxx profile sdm-ike-profile-1223
match identity group xxx
client authentication list sdm_vpn_xauth_ml_2
isakmp authorization list sdm_vpn_group_ml_1
client configuration address respond
virtual-template 1

crypto ipsec transform-set ESP-3DES-SHA esp-3des esp-sha-hmac

crypto ipsec profile SDM_Profile1
set security-association idle-time 60
set transform-set xxxxx
set isakmp-profile sdm-ike-profile-1

log config


bridge irb

interface ATM0
no ip address
no atm ilmi-keepalive
dsl operating-mode auto

interface ATM0.1 point-to-point
pvc 0/35
pppoe-client dial-pool-number 1

interface FastEthernet0

interface FastEthernet1

interface FastEthernet2

interface FastEthernet3

interface Virtual-Template1 type tunnel
ip unnumbered Dialer0
tunnel mode ipsec ipv4
tunnel protection ipsec profile SDM_Profile1

interface Dot11Radio0
no ip address
encryption vlan 1 mode ciphers tkip
ssid xxxx
speed basic-1.0 basic-2.0 basic-5.5 6.0 9.0 basic-11.0 12.0 18.0 24.0 36.0 48.0 54.0
station-role root

interface Dot11Radio0.1
encapsulation dot1Q 1 native
no cdp enable
bridge-group 1
bridge-group 1 subscriber-loop-control
bridge-group 1 spanning-disabled
bridge-group 1 block-unknown-source
no bridge-group 1 source-learning
no bridge-group 1 unicast-flooding

interface Vlan1
description $xxxxxx$
ip address secondary
ip address
ip nat inside
ip virtual-reassembly
ip tcp adjust-mss 1452

interface Dialer0
ip address negotiated
ip mtu 1452
ip nat outside
ip virtual-reassembly
encapsulation ppp
dialer pool 1
dialer-group 1
no cdp enable
ppp authentication chap pap callin
ppp chap hostname xxxx
ppp chap password xxxx
ppp pap sent-username xxxx.xx password xxxxx

interface BVI1
ip address
ip nat inside
ip virtual-reassembly

ip forward-protocol nd
ip route Dialer0

ip http server
ip http access-class 23
ip http authentication local
ip http secure-server
ip http timeout-policy idle 60 life 86400 requests 10000
ip nat inside source list 1 interface Dialer0 overload
ip nat inside source static tcp 25 25 extendable

access-list 1 remark SDM_ACL Category=2
access-list 1 permit
access-list 1 permit
access-list 1 permit
access-list 23 permit
access-list 23 permit
access-list 23 permit
access-list 23 permit
access-list 23 permit
dialer-list 1 protocol ip permit
snmp-server community private RW
snmp-server community public RO



bridge 1 protocol ieee
bridge 1 route ip

line con 0
no modem enable
line aux 0
line vty 0 4

scheduler max-task-time 5000


Are there are any thing wrong in config file delay or stop internet connection to mail server

please help me

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