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Cannot access SMTP port 25

mhixservice
Level 1
Level 1

Hi,

Below you will find the running-config. For some reason I am not able to access the mail server SMTP 25 through the router. Any input would be greatly appreciated.

Thank You,

Bobby

Authorized access only!

Disconnect IMMEDIATELY if you are not an authorized user!

User Access Verification

Username: xxxxx

Password:

mhirouter1#sh ru

Building configuration...

Current configuration : 2804 bytes

!

! Last configuration change at 11:53:10 America Wed Jul 14 2004

! NVRAM config last updated at 11:53:11 America Wed Jul 14 2004

!

version 12.2

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 mhirouter1

!

security authentication failure rate 3 log

security passwords min-length 6

logging queue-limit 100

logging buffered 51200 debugging

logging console critical

enable secret xxxxx

!

username xxxx privilege 15 password xxxxxx

clock timezone America/New_York -5

clock summer-time America/New_York date Apr 6 2003 2:00 Oct 26 2003 2:00

ip subnet-zero

no ip source-route

!

!

ip tcp synwait-time 10

ip domain name yourdomain.com

ip dhcp excluded-address 10.10.10.1 10.10.10.10

!

ip dhcp pool sdm-pool1

network 10.10.10.0 255.255.255.0

default-router 10.10.10.1

dns-server xxx.xxx.0.85 xxx.xxx.0.85

!

!

no ip bootp server

ip cef

ip audit notify log

ip audit po max-events 100

ip ssh time-out 60

ip ssh authentication-retries 2

no ftp-server write-enable

!

!

!

!

!

!

!

!

interface FastEthernet0

description $ETH-WAN$OUTSIDE

ip address xx.xxx.170.27 255.255.255.0

no ip redirects

no ip unreachables

no ip proxy-arp

ip nat outside

ip route-cache flow

duplex auto

speed auto

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

no ip address

no cdp enable

!

interface Async1

no ip address

no ip redirects

no ip unreachables

no ip proxy-arp

ip route-cache flow

!

interface Vlan1

description $FW_INSIDE$INSIDE

ip address 10.10.10.1 255.255.255.0

no ip redirects

no ip unreachables

no ip proxy-arp

ip nat inside

ip route-cache flow

!

ip nat inside source list 10 interface FastEthernet0 overload

ip nat inside source static tcp 10.10.10.3 25 xx.xxx.170.27 25 extendable

ip classless

ip route 0.0.0.0 0.0.0.0 68.236.170.1

ip http server

ip http authentication local

ip http secure-server

!

!

logging trap debugging

access-list 10 permit 10.10.10.0 0.0.0.255

no cdp run

!

banner login ^CAuthorized access only!

Disconnect IMMEDIATELY if you are not an authorized user!^C

!

line con 0

login local

transport output telnet

line 1

flush-at-activation

stopbits 1

speed 115200

flowcontrol hardware

line aux 0

login local

transport output telnet

line vty 0 4

privilege level 15

login local

transport input telnet ssh

line vty 5 15

privilege level 15

login local

transport input telnet ssh

!

scheduler allocate 4000 1000

scheduler interval 500

!

end

mhirouter1#

mhirouter1#

3 Replies 3

steve.busby
Level 5
Level 5

Is SMTP the only protocol not working? Are you trying to access SMTP via the device IP address or by name? Is the server up? What port/interface is it on?

I also don't see "ip routing" enabled.

Below are the answers to your questions.

Steve

Is SMTP the only protocol not working?

Every other protocol is working.

Are you trying to access SMTP via the device IP address or by name?

I am trying to access the mail server via the IP address. Example: telnet 63.115.9.204 25.

Is the server up?

The server is up and running. I am able to connect to port 25 from the internal network, but I am not able to connect to the port via the internet.

What port/interface is it on?

The static internal address of the mail server is 10.10.10.3.

I hope I answered your questions throughly.

Just check show ip nat translation , whether you can see the port 25 is mapped .Try to access mail server from outside after clearing translations once.Are you able to browse Internet from your private network ?