12-27-2012 11:11 PM - edited 03-04-2019 06:31 PM
Dear Friends,
i have an issue, i got Cisco 1700 Router with IOS: c1700-advsecurityk9-mz.124-15.T11.bin
The issue i am facing is :
Suddenly , all the Clients using ONLY Outlook can send mails but can't receive mail.
in the outlook, if u do TEST account, the Send/Receive (Pop3 110) state : completed but if u try to Send/Receive, Send Completed while Receive: Failed reason: check your ISP
in the Wireshark: nothing is receiving from outside
the same 3 laptops we are having issue, if we connect them directly to the Internet , they can send/receive mails normal
Please advice what shall i do to fix this issue!!
Cisco Router was working fine !!
Thanks in advance
12-27-2012 11:19 PM
Hi,
Show output of command:
sh run
And remove sesitive info like public IP addresses. Is there anything between router and clients? Check might be some ACL blocking. Are you able to access to Internet from Mail server?
Abzal
12-28-2012 05:50 AM
Thanks for ur reply
there's no ACL
i removed all the config and did basic config as the following:
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
!
boot-start-marker
boot system tftp c1700-advsecurityk9-mz.124-15.T14.bin 192.168.2.60
boot-end-marker
!
!
aaa new-model
!
!
aaa authentication login vty local
!
!
ip dhcp pool LAN
network 192.168.2.0 255.255.255.0
default-router 192.168.2.1
dns-server 8.8.8.8
ip name-server 8.8.8.8
interface Ethernet0/0
description " WAN"
no ip address
full-duplex
pppoe enable group global
pppoe-client dial-pool-number 1
!
interface FastEthernet0/0
description "To LAN"
ip address 192.168.2.1 255.255.255.0
ip nat inside
ip virtual-reassembly
speed auto
!
interface Dialer0
ip address negotiated
ip mtu 1492
ip nat outside
ip virtual-reassembly
encapsulation ppp
dialer pool 1
dialer-group 1
ppp chap hostname xxxxx
ppp chap password xxxx
ip route 0.0.0.0 0.0.0.0 Dialer0
ip nat inside source list INTERNET_NAT interface Dialer0 overload
ip access-list extended INTERNET_NAT
permit ip 192.168.2.0 0.0.0.255 any
!
!
control-plane
!
!
line con 0
logging synchronous
login authentication vty
line aux 0
line vty 0 4
login authentication vty
transport input all
!
end
12-28-2012 05:52 AM
show ip int fa0/0 | in access list
Outgoing access list is not set
Inbound access list is not set
#show ip int dialer 0 | in access list
Outgoing access list is not set
Inbound access list is not set
12-28-2012 07:43 AM
SMTP is used for outgoing and POP3 is used for incoming mail. If you're able to send, but not receive, have you checked the pop account on the client? Can you telnet to port 110 from one of the clients that's having the issue into the server that they're checking? For example, if they're using pop.gmail.com, can you open a command prompt and type:
telnet pop.gmail.com 110
You should come back with something. If it times out, check the url and try again. Also, run nslookup against the domain name to see if it resolves, or simply ping the name from the client. If that doesn't work, then you likely have a dns issue for the domain name that's attached to the pop server.
HTH,
John
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12-28-2012 09:38 AM
I tried to telnet
Every result is positive this thing drive me crazy
Been that 3 weeks back
Even in the account settings i used: ip instead of hostname same result
We are 10 clients , n facing same issue
I installed thunderbird, the same result !!!
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12-28-2012 09:41 AM
What's changed in your environment? I don't see anything on the router that would keep you from being able to connect....
HTH,
John
*** Please rate all useful posts ***
12-28-2012 11:33 AM
Nothing!!! The cisco router suddenly act like that!!
If i connect them directly to the internet, it'll work fine
I dont have firewall
Strange issue :(
Sent from Cisco Technical Support iPhone App
12-28-2012 12:14 PM
If you can get some downtime, try rebooting the router.
HTH,
John
*** Please rate all useful posts ***
12-29-2012 10:12 PM
Dear John,
i did reboot and removed the configuration and did basic one as you can see
the issue till the same!!!
in debug, it shows packets are forwarding normal weird!!
12-30-2012 08:12 AM
Try adding
ip tcp adjust-mss 1460
to interface Dialer0
12-30-2012 07:40 PM
You could probably remove your default route statement as your dialer interface will get its default route from DHCP. Maybe this is causing some issues.
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