Cisco forwarding port does not

Dear experts, I got a production Firewall (Cisco Pix 515e 6.3 (1)) and I have set up to allow access to the outside on a server (SSH only).

The server is 10.0.5.200.

External IP is a.b.c.d. (should I use the FW outside the IP address of the interface?)

Here's the sanitized output:

6.3 (1) version PIX

interface ethernet0 100full

interface ethernet1 100full

Auto interface ethernet2

interface ethernet3 100full

Automatic stop of interface ethernet4

Automatic stop of interface ethernet5

ethernet0 nameif outside security0

nameif ethernet1 inside the security100

nameif ethernet2 provider interieure4

nameif dmz security99 ethernet3

nameif ethernet4 intf4 security8

ethernet5 intf5 security10 nameif

activate the encrypted password of XXXXXXXXXXXXXXXX

passwd encrypted XXXXXXXXXXXXXXXXXX

IP address outside a.b.c.d 255.255.255.240

IP address inside 10.0.1.254 255.255.255.0

provider address IP X.X.X.X 255.255.255.0

dmz X.X.X.X 255.255.255.0 IP address

ARP timeout 14400

Global 1 interface (outside)

NAT (inside) 0 access-list sheep

NAT (inside) 1 10.0.1.0 255.255.255.0 0 0

Timeout xlate 03:00

Timeout conn 01:00 half-closed 0:10:00 udp 0: CPP 02:00 0:10:00 01:00 h225

H323 timeout 0:05:00 mgcp 0: sip from 05:00 0:30:00 sip_media 0:02:00

Timeout, uauth 0:05:00 absolute

GANYMEDE + Protocol Ganymede + AAA-server

RADIUS Protocol RADIUS AAA server

AAA-server local LOCAL Protocol

the ssh LOCAL console AAA authentication

NTP server 192.43.244.18 prefer external source

NTP server 128.102.16.2 source outdoors

Enable http server

6.3 (1) version PIX

interface ethernet0 100full

interface ethernet1 100full

Auto interface ethernet2

interface ethernet3 100full

Automatic stop of interface ethernet4

Automatic stop of interface ethernet5

ethernet0 nameif outside security0

nameif ethernet1 inside the security100

nameif ethernet2 provider interieure4

nameif dmz security99 ethernet3

nameif ethernet4 intf4 security8

ethernet5 intf5 security10 nameif

activate pnxJXWf9kU.x7YfY encrypted password

WL6KtWnsAjAQS2yI encrypted passwd

outside_access_in ip access list allow a whole

access list outside-access enable icmp a whole

access-list DMZ_access_in allow icmp a whole

IP address outside a.b.c.d 255.255.255.240
IP address inside 10.0.1.254 255.255.255.0
provider address IP X.X.X.X 255.255.255.0
dmz X.X.X.X 255.255.255.0 IP address

ARP timeout 14400
Global 1 interface (outside)
NAT (inside) 0 access-list sheep
NAT (inside) 1 10.0.1.0 255.255.255.0 0 0

Timeout xlate 03:00
Timeout conn 01:00 half-closed 0:10:00 udp 0: CPP 02:00 0:10:00 01:00 h225
H323 timeout 0:05:00 mgcp 0: sip from 05:00 0:30:00 sip_media 0:02:00
Timeout, uauth 0:05:00 absolute
GANYMEDE + Protocol Ganymede + AAA-server
RADIUS Protocol RADIUS AAA server
AAA-server local LOCAL Protocol
the ssh LOCAL console AAA authentication
NTP server 192.43.244.18 prefer external source
NTP server 128.102.16.2 source outdoors
Enable http server

Those in bold are the commands that I added:

static (inside, outside) tcp a.b.c.d 2022 10.0.5.200 ssh netmask 255.255.255.255 0.0

access-list 100 permit tcp any host a.b.c.d eq 2022

Allow Access - list 101 tcp 10.0.5.200 eq 22 a

Access-group 100 in external interface

Access-group 101 in the interface inside

When you access from the Wan, I used putty SSH port 2022 a.b.c.d IP in and he gave me of waiting times. I used the:

Capture interface capo outside access-group 100

The results were (that I can remember that I am not on site):

My WAN IP-> a.b.c.d (R)

My WAN IP-> a.b.c.d (S)

The server on the internal LAN access is great and I can access port 22 on the server on the local network (Note: there is a L3 switch in the environment and inside the IP segments are 10.0.1.0/24 and 10.0.5.0/24 routable both.)

This is what I did so far and would like more ideas on this subject that I am currently facing to. thanks!

Hello

Configuring static PAT (Port Forward) seemed correct to me.

If you use the IP address of ' outside ' interface you would generally configure the parameter "interface" , and not the IP address.

public static interface 2022 22 netmask 255.255.255.255 tcp (indoor, outdoor) 10.0.5.200

Of course if you can/want to save a public IP address for this server only you could configure static NAT

public static 10.0.5.200 (inside, outside) subnet mask 255.255.255.255

That would bind essentially those 2 IP addresses, and you can allow services that are needed for the current server. Naturally, you will also need to allow traffic in the external ACL to the new public IP address.

But it should also work with your configurations. If you want to use the IP address or a separate public IP's to you.

If you are missing the 'road' to the 10.0.5.0/24 subnet in your PIX configuration so it is an obvious problem in why the server is inaccessible from the Internet. So, I would start by adding the "itinerary" necessary and retest. If it does not then would be good to verify that the routing between the server and the PIX is fine. For example, there is a route to the PIX server, and the server has a default route takes traffic to the PIX.

Hope this helps

-Jouni

Tags: Cisco Security

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