03-30-2007 09:30 AM - edited 03-03-2019 04:21 PM
I am looking for some configuration help. I will be configuraing a stand alone 3725 router to access internet DS3. I have a public IP from the provider and looking for a basic config template. I would also like to access the router remotely from outside.
03-30-2007 10:14 AM
Hello,
Please find the link below for configuring the NAT on the router:
http://www.cisco.com/en/US/tech/tk648/tk361/technologies_tech_note09186a0080094e77.shtml
You can enable telnet on the router to access it from outside.Please configure the valid IP to access the router from outside
Conf t
username ABC password 123
enable secret 12345
access-list 1 permit host
Line vty 0 4
login local
access-class 1 in
transport input telnet
The link below will help you creating the telnet access-list to allow access from outside
http://www.cisco.com/warp/public/105/ACLsamples.html
HTH,
-amit singh
03-30-2007 11:02 AM
Though the configuration mentioned by amit on the vty lines would be good from a security point of view, the access-list could be a problem if you get dynamic ip assignment from the ISP
I would suggest using SSH though
Narayan
03-30-2007 03:21 PM
thanks for the reply.
04-02-2007 06:45 AM
If you are accessing your router from a single ISP outside, you can try to WHOIS your ISP netblock from one of the following (depends on your geographic location);
ARIN http://www.arin.net
APNIC http://www.apnic.net
LACNIC http://lacnic.net/en/
RIPE NCC http://www.ripe.net/
AFRINIC http://www.afrinic.net/
And put your ISP prefix in ACL 1. Some ISP have multiple prefixes for different use, ADSL, Office Connect, IDC, etc.. At least this way you have implemented some level of security which allows only "few" networks to be able to access your router. If in case your router is hacked, you know that the hacker is someone connected to your ISP and you can ask your ISP for the hacker details :)
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