Cisco Firewall :: Unable To Telnet / SSH / RDP From Inside DMZ / ASA 5505
Oct 31, 2011
I am unable to Telnet/SSH/RDP from my inside network to my DMZ. I am not sure where the problem lies, I am able to use VNC from the inside to the DMZ (ports 5800, 5900), and also establish connection on Ports (26700-26899). I have a computer connected directly to the DMZ and those services work to all networks on the DMZ.I have attached Logs of successful VNC connections, unsuccessful RDP and Telnet sessions, and the running config.
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Sep 9, 2011
I setup a site-to-site VPN tunnel at the remote ASA5505. I am able to asdm to the outside interface but not ssh. I switch to telnet and still not allow me to access. I added an ACL to allow telnet any to the outside interface but still not working. In ASDM I see the log Here is the second issue. When I want to change the telnet back to ssh using ASDM I got the following error.
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Feb 19, 2012
I have a Cisco ASA 5505 in our office. We are currently using Interface 0 for outside and 1 for inside. We only have 1 Vlan in our environment. We have two three switches behind the firewall. Today the uplink to Interface 1, to the firewall, on the switch went bad. I want to setup a second inside interface on the firewall and configure it as failover incase this happens again. I want to attach it to the other switch. Can I do this? If so, what do I need to do? would it only be a passive/standby interface?
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Feb 26, 2011
I am trying to configure our ASA 5505 so that our users can access our ftp site using [URL] while inside the firewall. Our ftp site is setup so that you can reach it by either browsing to the above url or by browsing to ftp://99.23.119.78 but we are unable to access our ftp site from either route while inside the firewall. We can access our ftp site using the internal ip address of 192.168.1.3.
Here is our current confguration:
Result of the command: "show running-config"
: Saved:ASA Version 8.2(1) !hostname ciscoasaenable password qVQaNBP31RadYDLM encryptedpasswd 2KFQnbNIdI.2KYOU encryptednames!interface Vlan1nameif insidesecurity-level 100ip address 192.168.1.1 255.255.255.0 !interface Vlan2nameif ATTsecurity-level 0pppoe client vpdn group ATTip address pppoe setroute !interface Ethernet0/0switchport access vlan 2!interface Ethernet0/1!interface Ethernet0/2!interface Ethernet0/3!interface Ethernet0/4!interface Ethernet0/5!interface Ethernet0/6!interface Ethernet0/7!ftp mode passiveobject-group service DM_INLINE_TCP_1 tcpport-object eq ftpport-object eq ftp-dataport-object eq wwwaccess-list ATT_access_in extended permit tcp any host 99.23.119.78 object-group DM_INLINE_TCP_1 access-list ATT_access_in extended permit tcp any interface ATT eq ftp access-list ATT_access_in extended permit tcp any interface ATT eq ftp-data access-list ATT_access_in extended permit tcp any interface ATT eq www access-list 100 extended permit tcp any interface ATT eq ftp
[code]....
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Jun 11, 2012
I am able to ping from Switch to firewall inside ip and user desktop ip but unable to ping from user desktop to FW Inside ip.. config is below for both switch and FW Cisco ASA5510....
TechCore-SW#ping 172.22.15.10
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.22.15.10, timeout is 2 seconds:
[Code].....
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Jan 26, 2012
I have a 891 router I have been testing some things on. I have been able to successfully telnet to it in the past with no problems. Just yesterday I was trying to set an interface to have an IP of 10.10.10.2 which I realized was an IP I had forgot to exlcude from DHCP and it was handed out to the computer I was using to telnet in. So I wrote in the exlcude commands and did an ipconfig -release ipconfig -renew on my PC that had the 10.10.10.2 IP. After the renew I was given 10.10.10.7 (put in a few more excludes).However the release dropped my telnet connection and afterwards I was completely unable to telnet in, getting the error that says I cannot open the connection on port 23. I had made some changes to my entire config beforehand which had it switch to use a new public IP. I never saved the changes and did a hard reset by unplugging the router to get my old config back and see if I could telnet after that. Still could not get in, same error. Well I went through and remade my entire config to use the new public IP. My 10.10.10.7 PC can access the internet, DNS, ping the router, all just fine. Still can't telnet. I remade my line/vty config and made sure it matched up with a config I had on another router. Still can't telnet. Last thing I did was go in and manually clear all open line connections. All that is left is an idle 0 con 0 line that it wont let me close. Still can't telnet.What the **** is going on with this thing? I am completely at a loss to explain why I cant telnet. It must be something in my ACLs that I am missing?
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May 14, 2012
I have a 5505 that currently has inside/outside interfaces and everything is working just fine. I am trying to create a DMZ that will essentially be just for vendors/guests. the DMZ will have full access to the outside (Internet) but no access to the inside. I am using the FW for DHCP, and 8.8.8.8 and 4.2.2.2 for DNS. I currently have 1 laptop in the DMZ vlan, and it is getting a correct IP, and it is showing 8.8.8.8 and 4.2.2.2 in ipconfig. I can ping/tracert 8.8.8.8/ 4.2. 2.2/74.125.137.147(what url... resolved to on a laptop connected to the inside vlan), but I cannot ping nor browse to url.... [code]
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May 14, 2012
We recently purchases the Cisco ASA 5505 to get familiar with it, possibly buying more appliances for our branch offices. However, since the appliance is installed, our SIP telephones no longer register with our SIP service provider.
The SIP phones are all on 10.0.1.0/24 while the SIP provider is external via the outside network. I copied our configuration below. how to enable SIP for all 10.0.1.0/24 hosts and ports 5060, 5160, 5260, 5360?
gcxfw# show running-config
: Saved
:
ASA Version 8.4(3)
[Code].....
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May 21, 2012
I have a standard ASA 5505 with inside, dmz and outside with the default security levels, 100/50/0. we have an email server inside which has been NATed and is working fine. However users accessing the wireless on the dmz are unable to access their emails on https (443). How do I allow SSL access ONLY to users on the dmz using ASA 8.4 commands or ADSM 6.4?
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Sep 29, 2012
I have 2 ASA and would like to build a Side-to-Side VPN between these ASA. So I can learn something about configure a ASA for different thinks. But now I don`t can Ping from a Client to the Internet-Router.My Configuration is:
Client IP 192.168.1.100 <===> ASA Inside 192.168.1.1 /Outside 192.168.178.254 <===> Router 192.168.178.1
Is there something wrong at my config? or do I need inside private Adresses and at the Outside Global IP`s.
At the Router I have a Static Route that the 192.168.1.0 / 24 ist to find over Gateway 192.168.178.254
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May 20, 2011
I have a ASA 5505 Sec Plus. I would like to allow outside hosts to our mail server and also our FTP server. So i would like to allow only SMTP, HTTP (for Outlook Web Access) and FTP.
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Sep 16, 2012
I have a 5505 with Base license running ASA software v8.4(2) that has been working happily for a while with an inside and an outside VLAN.
The outside has a single statically configured public IP, and I have a number of static NAT rules to expose a few internal servers as well as Dynamic-NAT for all devices on inside to gain access to the Internet... the main bits of the config are below:
interface Vlan1
nameif inside
security-level 100
ip address 192.168.1.1 255.255.255.0
!
interface Vlan2
[code]....
I now have a requirement to add a "dmz" VLAN for guests to have access to the Internet using a dedicated wireless AP, but not to any of the inside resources. As the ASA has a base license I have configured "no forward interface" to the inside vlan, which suits the purpose fine
interface Vlan12
description Used only for guests access to the Internet - no access to the corporate resources
no forward interface Vlan1
nameif guests
security-level 20
ip address 192.168.2.1 255.255.255.0
My problem is that when I try to add NATing from the dmz to the outside I get a:
ERROR: Address a.b.c.d overlaps with outside interface address.
ERROR: NAT Policy is not downloaded
with either:
object network guests_subnet
subnet 192.168.2.0 255.255.255.0
nat (guests,outside) dynamic interface
[code]....
Having had a look at the ASA Configuration guides, all the examples I can see with several "internal" VLAN's being NAT'ed use one external IP per VLAN - is this a feature/restriction of the ASA software? Are there any workarounds? Or is the overlap in the error message really about the current NATing to the inside VLAN which is done on the "any" 0.0.0.0 subnet - would the following then work:
object network obj_any
subnet 192.168.1.0 255.255.255.0
nat (inside,outside) dynamic a.b.c.d
object network guests_subnet
subnet 192.168.2.0 255.255.255.0
nat (guests,outside) dynamic a.b.c.d
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Apr 2, 2013
I have a test ASA 5505 with the setting below:
How can I connect to the internet (Vlan 1 to VLan 11)
[code]....
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Jul 19, 2011
I have an ASA 5505 with the typical inside/outside interfaces. I also have a DMZ that I've named remote for all of my ISP VLAN'd remote offices to connect. I've set the security levels on both the inside and remote interfaces to 100. From remote 192.168.71.0 network I can ping to the remote interface on my ASA, 12.230.129.66/8, but can't ping anything on the inside network, 192.168.1.0, or the web. From my ASA I can ping the router directly attached to the remote interface, 12.233.136.162/8. From my inside 192.168.1.0 network I can hit the web fine, but cant ping the remote router 12.233.136.162 or the remote network..
I dont' know if I missing something with routing, or with the two interfaces w/ same security...or what?
Here's my config. I've also attached an awesomely bad network map.
Result of the command: "wr t"
: Saved:ASA Version 8.2(5) !hostname ciscoasadomain-name wec.wnetenable password 8Ry2YjIyt7RRXU24 encryptedpasswd 2KFQnbNIdI.2KYOU encryptednames!interface Ethernet0/0switchport access vlan 2!interface Ethernet0/1!interface Ethernet0/2switchport access vlan 3!interface Ethernet0/3!interface Ethernet0/4!interface Ethernet0/5!interface Ethernet0/6!interface Ethernet0/7!interface Vlan1nameif insidesecurity-level 100ip [Code]...
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May 10, 2011
I have a new ASA 5505 and all is working fine, I can CLI and ASDM into it, but just can't ping the inside interface, do I need to enable a feature to make this work somehow?
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Apr 23, 2012
I am connecting the inside interface to an upstream switch and therefore will need to assign a static IP address to the inside address as I did below:
#sho int ip brief
Vlan1 123.123.123.123 YES manual up up
I will also use this to manage the ASA. I am having a problem with the network configuration of the inside interface as I can't ping the gateway and/or the in IP of the inside interface.Do I need to add any routes?
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Dec 20, 2012
For some reason there are some sites that I cannot access websites from inside interface.One such example is lxer.com where I am receiving this message in the browser:The connection has timed out The server at www.lxer.com is taking too long to respond.This has "suddenly" happened, and so I am wondering what others have done when such things has happened. My outside has a dhcp-IP, and I have noticed that this address had changed, so I corrected this in my router settings.ASA version is 5505
These are my settings:
: Saved
:
ASA Version 8.4(2)
!
hostname ciscoasa
domain-name example.no
enable password 123412321 encrypted
passwd 1231231 encrypted
names
[code]....
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Nov 9, 2011
I trying to allow traffic between 2 inside interfaces with the same security level. VLAN1 and VLAN15. The are on different physical ports on the ASA. I tried to configure this through the GUI Web interface and checked ' enable traffic between two or more interfaces with the same security levels'. With this ASA version, I do not need NAT to allow this, correct?
ASA Version 8.2(1)
!
hostname ciscoasa
[Code].....
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Jan 5, 2012
We have an ASA5505 UL bundel, updated with this license "L-ASA5505-SEC-PL=" to enable traffic from DMZ to Inside. No NAT or rules deployed for that yet.
On the Inside we have Exchange 2007 in a single server installation. The public url for smtp, ActiveSync, OWA and Outlook Anywhere is mail.company.se. There is a static NAT for outside traffic to access above mentioned services on inside. Now, on DMZ there is the WLAN for guests to access the Internet. How ever, our Smart Phones with WLAN turned on, cannot sync to the Exchange Server on the Inside! The DMZ gets IP-addressen from ASA on DMZ Interface with external DNS configured. How can I configure the ASA to achieve the function of ActiveSync from DMZ to Inside with the public URL from the phones?
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Feb 27, 2011
I have a cisco asa 5505 and i need a public ip address on the inside of my network without NAT. for example: I can create a static nat translation rule, but this is not what i need.
isp -> x.x.x.1 /29 (outside asa) (inside network) x.x.x.2 /29
Is this possible?
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Dec 12, 2011
I have an ASA 5505 that I'm trying to set up a guest network on. I've configured an interface as a trunk and allowed the 2 vlans but I'm not getting any layer 3 to it. The switch connected to it is a 3560 and port is configured as a trunk with the same vlans.
I can't ping the ASA inside interface but I see its MAC address in the swtich's table.
[code]....
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Sep 23, 2011
I have an ASA 5505 running 8.2(1), that is configured with three interfaces as follows:
Inside (security 100) 10.0.0.0 /24
Inside 2 (security 100) 192.168.0.0 /24
Outside (security 0) internet
Inside is connected to my internal network, inside 2 is connected to the network of a sister organization, outside is outside.
I'd like to be able to route between from inside to inside 2, and have NAT translate me to inside2's address.
I have inter-interface traffic configured, and when I use a NAT exemption, I can route fine. But the resources on network 2 must see my request as coming from the inside2 interface IP.
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Mar 6, 2011
My customer is running an ASA5505 with 8.3 code.
The have a somewhat flaky proxy between their inside LAN and the firewall. I'd like to have a configuration as follows:
LAN > Proxy > VLAN 1 (eth0/2) on ASA
and
LAN > VLAN 1 (eth0/3) on ASA
So that in the event of Proxy failure (let's just say it loses power) the eth0/3 interface will kick in.
This appears to be easily configured according to the documentation:
"The following example creates two redundant interfaces:
hostname(config)# interface redundant 1
hostname(config-if)# member-interface gigabitethernet 0/0
hostname(config-if)# member-interface gigabitethernet 0/1
hostname(config-if)# interface redundant 2
hostname(config-if)# member-interface gigabitethernet 0/2
hostname(config-if)# member-interface gigabitethernet 0/3"
But these commands don't seem to be available on a 5505.
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Jul 6, 2011
i have an asa 5505 firewall with asa version 8.2(1). my asa connected on wan port over isp router on internet.inside users connected over dlink switch and the allied telesis 24 ports switch on this asa. the inside users are blocked and they can't communicate. all inside ports of asa 5505 are in one vlan and all ports are switch ports. the configuration of my firewall is
: Saved : Written by xxxxxx at 11:26:22.109 CEDT Thu Jul 7 2011 ! ASA Version 8.2(1) ! hostname asa5505 domain-name dri.local enable password 8Ry2YjIyt7RRXU24 encrypted passwd 2KFQnbNIdI.2KYOU encrypted names ! interface Vlan1 no
[Code].....
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Jul 21, 2012
We have a Cisco ASA 5505 (v7.2(3)) with a "fairly" normal configuration yet we have a problem where it appears UDP/53 traffic is denied on our inside network.
here is output from our sys log:
SyslogID Source IP Dest IP Description
305006 172.18.22.3 portmap translation creation failed for udp src inside:172.18.22.156/42013 dst inside:172.18.22.3/53
To give some clarification:
172.18.22.3 is one of our DNS servers
172.18.22.156 is a device we're experimenting with.
We've bypassed the Cisco by using a 4G wireless router with this same device - and it works flawlessly.Here is a [scrubbed] copy of our config. It is what I inherited from the previous admin - I'm not sure of all its finer points (I'm not Cisco certified -- perhaps I'm just certifiable.)
: Saved
:
ASA Version 7.2(3)
!
hostname [redacted]
[code].....
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Feb 12, 2013
Trying to add inside routes on an ASA 5505 to point traffic to another gateway for other connected networks is resulting in the following error 6Sep 16200 819:13:5810601510.184.236.1265003810.170.54.1823389Deny TCP (no connection) from 10.184.236.126/50038 to 10.170.54.182/3389 flags RST on interface insideI believe the problem is due to the Asymetric tcp connection and the ASA is dropping the connection because it only see one half of the traffic.Is there a way we can stop the firewall dropping the TCP connections on the inside interface? i've tried removing the threat managment which didnt work.Annoying thing is were putting the ASA 5505's in to replace old Watchguard soho firewalls only the watchguards forwarded the traffic no problem at all.
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Apr 6, 2011
I have a pair of 5505's in transparent mode and connected them to C2960S. The inside interface (which is VLAN5 on the switchport) keeps dropping, going in to error state. There is no log reference in the switch and the interface shows as UP. The standby ASA has no problem, both interfaces on the switch is up. As soon as I failover the units over, the active node inside interfaces drops.
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Apr 15, 2012
I have been asked to set up remote access VPN on an ASA 5505 that I previously had no invlovement with. I have set it up the VPN using the wizard, they way I normally do, but the clients have no access to anything in the inside subnet, not even the inside interface IP address of the ASA. Thay can ping each other. The remote access policy below that I am working on is labeled VPNPHONE, address pool 172.16.20.1-10. I do not need split tunneling to be enabled. The active WAN interface is the one labeled outside_cable. [code]
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Nov 30, 2011
ASA 5505 and DMZ, I have a Base License.
What do I need to do for access inside network to DMZ?
I successfully configure, internet Access for DZM and inside network, web server can be accessed from internet, but I have problem to configure communication from inside network to DMZ.
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Jan 7, 2012
Previous attempts to set up these NAT rules has been met with minimal success. We have been able to get the NAT rules created, and able to ping our inside servers and receivers from a different outside network, but every time we get that far our internal network crashes. Running the Packet Trace utility via the ASDM shows that internal traffic from the servers to the workstations is being blocked by the default implicit rule under the access rule heading that states "any to any, service being ip, action= deny". Reverse traffic from the workstations to the servers is being allowed though. In an effort to start over again, the Cisco ASA has been Factory Defaulted via the CLI, and has had it's Inside network, and Outside IP address set back up. DHCP pool has been setup for a minimal amount of addresses on the inside network, since most of our equipment will always be assigned statics. We reset our static NAT policies, and seem to be having the same problem. My partner and I have been working on this for some time now, and have ourselves so frustrated that I know we are missing something simple. [code]
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May 19, 2011
I just installed a new ASA 5505 for an office with three internal subnets. The three networks can each get online fine and ping eachother, but cannot browse to shares on the two internal networks other than their own. How do I configure the ASA to allow all traffic between these three inside networks?
192.168.152.0
192.168.152.0
192.168.154.0
[code]....
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Jul 26, 2011
I am having a problem configuring my ASA 5505 for NAT.
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Oct 25, 2012
I'm having trouble setting up the correct rules on an ASA 5505 I'm using in my home office. I have a couple of IP Cams I need to access remotely.
I've tried setting up simple NAT(PAT) and/or Access Rules, but it hasn't worked. I have a single dynamic IP for the Outside interface. Call it 77.76.88.10 and I am using PAT. The CAM is setup to connect on port 80, but could be configured if necessary. I've tried setting up NAT Rules using ASDM as follows:
Match Criteria: Original Packet
Source Intf = outside
Dest Intf = inside
[Code]....
I'm afraid to use CLI only because I am not confident I'll know how to remove changes if I make a mistake.
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