Cisco Firewall :: Port Forward Telnet On ASA 5520?
Sep 26, 2012
I have a cisco asa 5520. i need to forward telnet to a router on the inside interface. Here is what i have done so far but it doesnt seem to be working.
I have created an access-list that looks like this:
access-list 102 extended permit tcp any host 10.10.60.2 eq telnet
But when do this it still doesnt forward my request to the router at 10.10.60.2 . So just to explain what im trying to do. I use Putty, i am putting the outside interface IP into putty, selecting telnet and opening the session. i need the outside interface to see this request and know to forward port 23 to the router on the inside interface with IP 10.10.60.2. The ASA is running version: asa842-k8.bin
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Jun 2, 2010
When users are VPN connected their telnet sessions timeout after an hour of inactivity. Looking at the connections on the firewall they are showing as idle. Is there a configuration change or something else that has to be modified?
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Dec 8, 2009
I got 2 x 5520 ASAs configured in active/standby mode and they are connected to 2 x 4500 switches in which too configured for failover.Telnet to ASAs is allowed only via subnet 172.18.0.0./24
I can only ping and telnet to the active ASA from subnet 172.18.0.0./24 but not the standby But i can ping and telnet to both the active and standby ASAs within the 4500 switches.
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Nov 7, 2011
I have one server 172.16.0.100 and i nat this server to a public ip X.X.X.5 and i open RDP for this public ip.Now when i access Remote desktop on this public ip x.x.x.5 it open perfectly.Now my senario is that i want to open a http url on port 5555,server ADMIN open port 80 for this URL on LOCAL lan(http://172.16.0.100:80)So how can i map port 5555 to port 80 on ASA 5520.so when i hit URL [URL]
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Sep 20, 2011
I always seem to have problems when trying to configure port forwarding on cisco routers. I've even tried the instructions I have for a cisco 1811, but no luck. I have a cisco 871 and a computer that has VNC installed on it. I want to be able to access that computer from out side the network using the external ip address and port 5950. People outside the network will be able to open vnc viewer and type in *external ip address*:5950 and it will be directed to the computer with a static internal ip address of 10.12.0.10. What commands do I use to do this?
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Nov 20, 2012
My internet works. However port forwarding does not work. I want to port forward from the outside to inside obviously. I get an error in my log file which Ill show you and then I will share the running-config I have tried using this method found elsewhere.
========================================================================================================
ATTEMPTED CONFIG
object network inside-host
host 192.168.100.4
nat (inside,outside) static interface service tcp 3389 3389
access-list Outside-2-Inside line 1 extended permit tcp any host 192.168.100.4 eq 3389 log informational interval 300
access-group Outside-2-Inside in interface outside
[code]....
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Jan 19, 2013
I'm trying to do a normal port forward on a ASA 5505 with 9.1(1) and it is not working as it should.There are two ports that I want to forward, TCP 32000 and TCP 32001, from the outside interface.I tried a Auto NAT that gave rpf-check drop. [code]
I have tried diffrent configurations on this for several hours now and I cant get it to work.Could this be asymetric NAT with the dynamic rule? How can I troubleshoot this in a smart way?
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Oct 11, 2011
i´m trying to make a traditional port forward (http to http) on our new asa5510. Previous releases off 5505 and software prior 8.3 was no problem. Could someone tell me how do it in new 8.4 version? I ám a rookie on the new ASA series!
If nothing makes sense in this configuration please give example on how to do it correct. The object on the inside is SRV02 wich is running a webserver on port 80. So i want to open upp for http on outside interface and forward that traffic to srv02 (inside webserver)
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Jan 1, 2012
I consider the NAT mechanism to be quite straight forward, but although the firewall ACLs allow the traffic, it is being denied. The ASDM log and packet-tracer indicate the problem being an ACL.
# the internal resource
object network mabe-mbp
host 10.0.0.36
!
# these are ALL of the rules on the outside/inside interfaces
access-list outside_access_in extended permit tcp host 1.2.3.90 any eq 12380 log disabled
access-list outside_access_out extended permit ip any any log
access-list inside_access_in extended permit ip any any log
access-list inside_access_out extended permit ip any any log (code)
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Sep 8, 2010
Successfully creating a port-forward in ASA5510, ASA version 8.3(1) ASDM6.3(1)?I have spend hours now trying, but I'm still unsuccessful.What I want is a simple: "if this particular ip-adress hits the wan interface on this tcp-port redirect to this inside ip-address on this tcp-port.I have never had any trouble on any other firewall creating something like this, but the ASA is killing me.
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May 7, 2013
i can't do it with ASDM and try to use command but still fail
nat (inside,outside) source static inside-10.18.20.162 4F-1.1.1.2
it is working fine for the above command if there is more than one public ip, in case 1.1.1.1 is for firewall interface public ip?if i have only one public ip and i would like to forward http traffic to my internal network? how can i use command to do that?
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Dec 30, 2012
I am a total Cisco novice who has just had a ASA5505 installed to replace a linux freeware firewall (smoothwall).I'm told that the 5505 can't port forward traffic (e.g. ssh) from two external IP addresses to two internal destination machines via the same port # (22 in this example).
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Dec 27, 2011
I have one public IP address but multiple local servers that run on the same port. I cannot change the port the clients use to connect to this server, so I can't do a port map in my NAT router. The solution I had in mind, is to filter on source address. If a client from public IP X.X.X.X connects to port Z, I want it to go to internal server 10.10.10.10 and if a client from public IP Y.Y.Y.Y connects to port Z, I want it to go to internal server 10.20.20.20. Is this possible? I'm using an ASA5510 but I could also switch to a 5505 for this.
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Jul 25, 2011
I'm having a problem forwarding port 1723. What i'm trying to do is to use VPN to access my server pc and I don't want to use the VPN software that is in the router. When I telnet the port it goes through but when i try to access it outside of the office I can't get through. I've been using [URL] to check port 1723 and I get this:
Error: I could not see your service on XX.XX.XX.XX on port (1723)
Reason: Connection refused
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May 4, 2011
I have a couple of ASA 5505's which work fine for what they are doing VPN and all that - we have 1 DLINK DFR-700 Firewall left and I need to get a new ASA to replace this since it is old.
All this box really does is port forward external clients to 1 address on the internal lan for client software updates. Any example configs?
So lets say we have client a with IP 1.1.1.1 and client b has 2.2.2.2 - at the moment this is what happens client a and b come in through http and get mapped to the internal http server 10.10.1.2
So I need to setup about 100 clients which can come in through http only - get mapped to the internal IP and also keeping the internal server to be able to access anything outside.
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Jun 11, 2012
We have an ASA 5520 and it's inside interface is currently plugged into a fast ethernet port on a 3750. I have just bought a 1gig SFP module and have copied the fast ethernet port config to the gigabit port, but the port seems to be flapping
The port conf gi is this:
interface GigabitEthernet1/0/4
description Link to Inside ASA
switchport access vlan 2
switchport trunk encapsulation dot1q
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Jan 2, 2012
I have got ASA 5520. How to use the management port as a normal port on ASA. What are the basic reqirements for that.
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Nov 29, 2011
we are having a firewall asa 5520 .we have connected the management port and inside port to internal network and dmz port to dmz network.now we need to configure tacacs and other management tool on dmz devices through management port. The problem is the management devices tacacs and other are placed in internal network.
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Jul 12, 2011
On an ASA5520 v7.2 I can only seem to authenticate to the console when using telnet and not ssh. I can connect using both methods, but just have trouble authenticating with ssh. Here are relevent lines related to the issue:
username user1 password ***** encrypted privilege 15username user2 password ***** encrypted privilege 15
aaa authentication telnet console LOCAL
aaa authentication ssh console LOCAL
telnet <my subnet> 255.255.255.0 Inside
ssh <my subnet> 255.255.255.0 Inside
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Jan 13, 2012
In a cisco firewall 5520 how could you take a public wan connection and pass it to another firewall behind the 5520 without using nat. How could you put a single port on the 5520 into transparent or passthrough much like you can on a broadband modem?
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Oct 3, 2012
I have an ASA 5520 Cisco Adaptive Security Appliance Software Version 8.4(2)8 Device Manager Version 6.4(5)206. I am trying to add a nat for outside x.x.x.77 port going inside x.x.x.22 port 80 . the wan interface is .74 with subnet of 255.255.255.248 the rule will add but traffic wont pass in.
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Oct 3, 2012
I am trying to forward all the traffic of a particular port number to my outside interface forwarded to an internal IP address.
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Jun 11, 2013
So everything I've read on Cisco's documentation here: URL says that I can create a port-channel on two physical interfaces that will uplink to a VSS pair. However, the command is not recognized. What am I missing? I've tried executing "channel-group #" on the physical interface and tried creating the port-channel 1st and neither commands exist. I haven't seen it listed anywhere if it is only available after a specific piece of ASA software. If it is the software what version at a minimum I need to upgrade to? Below is an output from a show version
Cisco Adaptive Security Appliance Software Version 8.0(4)
Device Manager Version 6.1(3)
Compiled on Thu 07-Aug-08 20:53 by builders
System image file is "disk0:/asa804-k8.bin"
Config file at boot was "startup-(code)
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Nov 18, 2012
Region : Italy
Model : TD-W8968
Hardware Version : V1
Firmwae Version : latest
ISP : telecom italia business on ipatm
How to Forward an external wan port like 49150 to lan ip on port 22?In the control pannel I can set only one port , and this port will be the same where the connection will be router to the lan ip ,therefore If I set the port 22 , the connection will be natted to the 22, but how to set a different external port to a specified different lan ip port?
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Oct 12, 2012
Is it possible to create a service which will forward public port 9010 to an internal IP address with port 23?First of all, I do not like to open the public Telnet port to the inside so I would use another public port and second my ISP does not allow some public ports beneath port 80?
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Oct 31, 2011
I am trying to correctly configure our ASA 5520 and our Mitel Border Gateway in our DMZ. In the documentation for the Mitel border gateway it wants me to set up 2 external IP's on my ASA one to allow 443 traffice into the MBG, and another for 443 traffic that needs to be forwarded to port 4443 for the MGB in the DMZ. My problem is I don't know how to do this. the MBG only has one IP, and I need to have 2 different URL's mapped to two different external IP's both externally using port 443, and one of them forwarding to 4443 on the DMZ interface.
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May 26, 2012
I am having cisco asa 5520 with internet having public ip and cisco 2911 with mpls link in my office. the mpls link is between my HO and my branchmi am putting my webserver in the branch side i want to port forward one of my publicip in my office to be forwarded to branch we, server.is it poosible on the firewall ouside the local network.
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Jun 5, 2012
I need to allow traffic between webserver in dmz and mssql (Microsoft SQL Server 2008).MSSQL use dynamic port (now it is 63796) and this cannot be changed.
Basically, I can allow such traffic using next configuration:access-list dmz extended permit tcp host 1.2.3.4 host 5.6.7.8 eq 1433access-list dmz extended permit udp host 1.2.3.4 host 5.6.7.8 eq 1434 access-list dmz extended permit tcp host 1.2.3.4 host 5.6.7.8 eq 63796
But, I would like to add mssql inspection and I did the next:
class-map class_sqlnetmatch port tcp eq 1433policy-map global_policyclass inspection_default inspect dns preset_dns_map inspect ftp inspect h323 h225 inspect h323 ras inspect ip-options inspect netbios inspect rsh inspect rtsp inspect skinny inspect esmtp inspect sqlnet inspect sunrpc inspect tftp inspect sip inspect xdmcp class class_sqlnet inspect sqlnet service-policy global_policy global
[Code] ..........
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Sep 18, 2012
I have only recently noticed a HUGE decrease in my Utorrent speeds, so i thought i would have a gander and lo and behold.apparently the port Utorrent uses wasn't open. Now, i have tried about 10 different port numbers, made sure Utorrent is being accepted by Norton 360 Firewall,followed complicated directions to (i think) foward ports, and also follow directions to open a specific port.Nothing has worked so far, Utorrent still comes back with a port closed error.
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Jul 6, 2012
I have an ASA 5520 and I'm using Solar winds real time interface tool to monitor the through put of the port. It seems I can never get it to use more than 100mb, where should I check?
I have run a sh int giga 0/1 and it shows the port is 1000mb full duplex and the I have also checked the other end where it plugs into the LAN and this also says the port is running at 1000mb full duplex.
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Mar 8, 2011
I was unable to telnet in to a SQL server on port 1433 to test the connection from the client PC.the application could connect and this alone verifies it is working on port 1433 for sql.My question is how can a telnet command on a specific port be blocked ?
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Jul 11, 2011
My cisco 837 is connected to a ADSL Router by Ethernet Cable. I have forwarded the telnet port from my ADSL Router to the LAN IP of the Cisco Router so that i can connect to it Remotely but it is not working. I am able to telnet internally but from Internet it is not working. I am not using Cisco Router for ADSL Connectivity.
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Jan 2, 2011
I have just purchased a nas drive. I want to be able to access my files from anywhere. I believe if i setup FTP i can view the files over the web. from what i have been told i need to forward port 21 to the ip address of the nas drive.
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