How do I open a port on a Cisco 2801 router?

How do I open a port on a cisco 2801 router?  Or how do I tell if a port is open?

Thank you
cas_threeAsked:
Who is Participating?

Improve company productivity with a Business Account.Sign Up

x
 
damalanoCommented:
asuming you are using nat.
you need for example to recieve mail from outside ?  (port 25)

ip nat inside source static tcp <inside address server>  25 <interface outside> 25

and ad this to access-list
access-list XXX permit tcp any any eq smtp   or
access-list XXX permit tcp any (outside ip) eq smtp
remember to replace the whole access-list XXX

if you want to see if the port is open from the outside ( internet )
www.grc.com and use shields up !

If this is not what you mean post your config and explane more

0
 
SouljaCommented:
If you don't have any access lists on any of your interfaces then the router is wide open.
0
Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

 
cas_threeAuthor Commented:
I do have access lists, all I need to know is if SNMP is enabled.
0
 
SouljaCommented:
You want to allow snmp through the router or you want to know if it is enabled on the router ?

If you want to allow it through I believe damalano answered your question.




0
 
cas_threeAuthor Commented:
I would lilke to know if it's enabled.
0
 
amprantiConnect With a Mentor Commented:
If ytou want to find if snmp is enable when you are in enable mode:

sh run | i snmp

If you find any community names or traps snmp is enable
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.