How to change the ip and port forwarding on a cisco router ***newbie***

what is the model of the Cisco router that you have?

This is very generic, there may be multiple routes setup, I was just giving example of command.  

Without seeing your config I wouldn't know exactly what to change for your specific configuration to verify that your remote login would work.  You can type:  sho run  and scan for entries that have your old IP address in it.  I am sure there may be telnet entries, SSH access entries, etc.

It is a PIX 506E

what you will want to do is telnet into it and do a "show run" to review the configuration.

you will want to look at where the old IP is in the config and replace it with the new information. if you have absolute ZERO experience, posting snippets of the config will assist in helping you. but over all you will want to make the changes to the serial interface and default route which is real simple if it a point-to-point circuit.

then for the IP forwarding if you are using NAT, this will work

ip nat inside source static tcp 192.168.1.200 22 209.247.228.201 22
extendable

or you can do it by interface

ip nat inside source static tcp 192.168.1.200 22 interface serial0 22
extendable



forwards SSH (tcp port 22) traffic to the inside address 192.168.1.200
from the outside address 209.247.228.201

the PIX is a little different than a router. there will still be the default route, however there is named interfaces such as inside and outside. also port forwarding on the PIX if you are natting is as follows

static (inside,outside) tcp interface 3389 192.168.1.99 3389 netmask 255.255.255.255

that forwards traffic from the outside interface to 192.168.1.99 on port 3389 (microsoft RDP)

Here is the info from the ISP: (not actual)
Default Gateway: 6.2.17.9 NEW
Netmask: 255.255.255.248
Usable IPs Low: 6.2.17.10
Usable IPs High: 6.2.17.15
Primary DNS: 216.68.1.100
Secondary DNS: 216.68.2.100
Serial Interface (Fuse): 6.2.16.7 NEW Serial Interface (Customer): 6.2.16.8
Netmask: 255.255.255.252

So I would change to: ????
ip address outside 6.2.17.9 255.255.255.248
and
route outside 0.0.0.0 0.0.0.0 255.255.255.248

Thanks on the port forwarding, I understand that.  So that won't change at all, once I configure the outside/inside interfaces correctly.

As smahankali put it, his "route outside" statement is correct.  The one you entered is the subnet and not the IP address used for the gateway.  I would probably backup your existing config before making all these changes so you will have a reference point.

So, to confirm base on the info above:
ip address outside 6.2.16.8 255.255.255.248
and
route outside 0.0.0.0 0.0.0.0 6.2.17.9

Default Gateway: 6.2.17.9 NEW
Netmask: 255.255.255.248
Serial Interface (Fuse): 6.2.16.7 NEW Serial Interface (Customer): 6.2.16.8
Netmask: 255.255.255.252

From your previous.  There are 2 subnets, what interface does the .248 subnet belong to?

I will check, I assumed the 252 was the Subnet for the T1/Phone System and the 248 was my Subnet.

Since you said your using a 506e I assume your interface for outside access is an ethernet jack?  Or does all your traffic go via serial to another device?

Yes, an ethernet jack.

do a show configuration on your 506e and look for any nameif statements (should be within the first few lines).  See what the Port0 is named, most likely it is "outside".  If this is the case then your statements from earlier should work.

ip address outside 6.2.16.8 255.255.255.248
and
route outside 0.0.0.0 0.0.0.0 6.2.17.9

However, from another earlier post of yours it seems that the 6.2.16.8 is already assigned to a serial port.  You can't have 2 ports with the same IP.  Just make sure the IP address given to you by your ISP for the ethernet port0 (since that is usually the one that 506e uses for public access) is the one you use with the subnet you have listed.  I am curious if it works.  If you have issues, we can help resolve them

OK, I am onsite, I have connection via my laptop to the Adtran device, but I am still having issues connecting via the Cisco PIX.

Here is the config that works on the laptop:
IP: 6.2.17.10
SubNet: 255.255.255.248
Gateway: 6.2.17.9
Primary DNS: 216.68.1.100
Secondary DNS: 216.68.2.100

This is how I Configured the router: (remember I am a novice at this)
Enter pass
enable
configure terminal
ip address outside 6.2.17.10 255.255.255.248
(this works)

route outside 0.0.0.0 0.0.0.0 6.2.17.9 1
(when I do this I get:
cannot add route entry. possible conflict with existing routes.

The route that is currently in the cisco from the previous configuration is:
route outside 0.0.0.0 0.0.0.0 6.11.147.121 1

Also, after this I did
write terminal
write memory
and
reload

I tried the route outside command again and received the same error message.

once it works for you, just an advanced FYI...you will need to type "write mem"  or the configuration you changed will be lost the next time it is power cycled.

Thank you very much.