Hi I have mail server his ip is 192.168.1.4 internally my network and public ip is 78.93.244.61
when i test internet access to mail server it give test internet connection failed
i call my isp i told them test internet connection failed please open port 25
it make as following
#sh run | include ip nat
ip nat inside
ip nat outside
ip nat inside
ip nat inside source list 1 interface Dialer0 overload
ip nat inside source static tcp 192.168.1.4 25 78.93.244.61 25 extendable
Protocol Address Age (min) Hardware Addr Type Interface
Internet 10.10.11.1 - 001d.70db.74e0 ARPA BVI1
Internet 78.93.244.61 - 0021.d814.3c21 ARPA Vlan1
Internet 192.168.1.4 0 000d.9d95.5fca ARPA Vlan1
Internet 192.168.1.7 2 a0f3.c179.0414 ARPA Vlan1
Internet 192.168.1.217 10 5c95.ae0c.080e ARPA Vlan1
Internet 192.168.1.254 - 0021.d814.3c21 ARPA Vlan1
#ping 192.168.1.4
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.4, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms
after doing that port 25 opened in public ip 78.93.244.61 and
it working for two days after this internet connection failed
I can send email from sme mail server locally in port 25
without any problem
but when i send or recieve to outside no sending or recieving
i work in server only mode
i use cisco router 800 series as gateway with ip 192.168.1.254
from 5 years it is working without problem
before two week this problem happen test internet connection failed
although
1- port 25 is open in public ip for mail server 78.93.244.61
2-i can send locally inside my network
when i make ping to 78.93.244.61 from mail server meaning from 192.168.1.4
it give me hosting unreachable
ping to 192.168.1.254
it give me reply without problem
ping to 8.8.8.8
hosted unreachable
How to solve this problem
before two week i search for solution
after i write commands above working for two days
after this again test internet connection failed
although ppp light fixed light
cd light is fixed
dsl light flushing
when i put configuration as following:
192.168.1.90
255.255.255.0
192.168.1.254(gateway as cisco)
i can access internet over cisco
suppose i connected router with windows 7 or xp
i can see google
open any internet web page
Can please tell me what i do
