Why is this happening?(cisco)

BarryprBarrypr Member Posts: 71 ■■□□□□□□□□
A cisco router that I have set up at a customer site is not holding a nat setting, this was not an issue until recently, say past few weeks:

"ip nat inside source static tcp <ip address> 25 <ip address> 25 extendable"

I have several nat lines like this, but this is the only one that somehow deletes itself from time to time, in order to re-add the line I must reboot the router then add it, if I enter the command without rebooting it does not save.

We have had a recent issue woth someone trying to gain access to this router via a dictionary attack not sure if that has anything to do with it as of recent there has been no attacks, does anybody have any idea why this is happening to just port 25!


  • networker050184networker050184 Mod Posts: 11,962 Mod
    Have you checked for any kind of bugs in your version of IOS? Are you issuing a copy run start or simillar after putting in the command? Maybe its not saving and the router reboots and the config is gone. Also check the config register.

    Might want to change the password to be on the safe side also.
    An expert is a man who has made all the mistakes which can be made.
  • BarryprBarrypr Member Posts: 71 ■■□□□□□□□□
    Ya I changed all the passwords, do a copy run start, the router doesnt reboot from what I am aware of, the one line just deletes itself and just that one line thats used for mail, its been in place for almost one year no problems really until now, strange!
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