Cisco Firewall :: ASA 5505 - How To Configure DMZ Access For Ftp / Https Without NAT
Nov 18, 2012
I have a closed network that is not connnected to the internet, just other sites that we want to communicate with. We have a cisco router connected to the outside interface on an ASA5505 and a cisco router connected to the inside interface on the same ASA5505. I have an inside interface that connects our management LAN, five separate DMZ interfaces with a separate LAN (VLAN) on each DMZ interface and the outside interface that connects to the other sites. Data is not allowed to mingle between the five DMZ's.Â
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Alll connections to the other separate nodes are handled with the router on the external interface. IPSEC GRE tunnels have been established between all sites and BGP routing has been verified. Pings are good between inside, dmz and external interfaces and between the DMZ's and the other sites, to include hosts on our local networks and hosts at the remote sites. Inter and intra traffic is enabled.
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When a remote site attempts an https connection, the initial ACK handshake makes it through the ASA5505, but the return SYN/ACK is being knocked down and I don't understand why (it is not because of ACL's, they are any any at this point).
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Why the return SYN/ACK to the remote site isn't getting through the ASA5505 outbound. Will probably have the same issue with FTP, but right now, just trying to solve one problem at a time.
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ASA5505 is in routed mode, not looking to NAT since the IP addresses in the DMZ need to be reached by their real IP address.
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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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May 28, 2012
I have a cisco asa 5505 firewall. Is it possible to block secure websites in it like [URL]? I have already tried regular expression filtering but it filters only http traffic.
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Jan 6, 2011
I'm trying to access my ASA 5505 by https://192.168.1.1 but I can't. I'm using Windows 7. I already have installed ASDM and I can enter in the box by ASDM. I am preparing to reformat my PC and I'm afraid that I won't be able to access my ASA if I do.
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The Mozilla show the message:Â An error occurred during a connection to 192.168.1.1.Cannot communicate securely with peer: no common encryption algorithm(s).(Error code: ssl_error_no_cypher_overlap)
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Sep 14, 2012
I have an ASA 5505 running 8.4.4.1. I've configured three WAN interfaces and have assigned failover on one of them (we have two ISP's, and a total of 3 static IP's in 3 different subnets). I've noticed that all the traffic is flowing through only one of the three interfaces, but I need to allow incoming https traffic on the second WAN port so I can access our Exchange server (we already use https on the first WAN port to access another server).
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[code] WAN1 is the default outgoing route and we've configured several incoming services on it (smtp and https for example) and appears to be working properly as mail is coming and going and users can access the RDS gateway.I need to configure WAN2 to accept https traffic and send it to our Exchange server to enable OWA (webmail) access.I've configured the same Access and NAT rules on all three WAN interfaces for smtp (but I suspect only the first one is currently functioning at this point, I'll test it next chance I get). I thought all I'd have to do is configure an access and NAT entry on WAN2 (same as on WAN1), but direct the traffic to the OWA server instead of the rds gateway server, but it is not working.
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In the realtime log I can see that it appears to be receiving the traffic on the WAN2 IP, but seems to be passing this through to the inside via the WAN1 interface.
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Jan 14, 2013
I have an ancient Alteon load balancer which only supports HTTP and telnet access. Our management people only allow HTTPS through the management firewall farm, and don't want to change this policy. So I need a low cost HTTPS to HTTP conversion, ideally on Cisco hardware like an ASA5505. It only needs one concurrent user. Is there a way to configure an ASA 5505 to terminate the inbound HTTPS seession and re-originate a HTTP management session to the Alteon? It looks to me as if the Clientless SSL VPN might do the job.Is there a way to do a SSH to telnet conversion on the ASA, or on a router?
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Nov 21, 2010
Does my device not support enough encryption to get ASDM/SSL/HTTP working?
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First time I've ever seen this...:Â
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%ASA-7-609001: Built local-host inside:192.168.1.10 %ASA-7-609001: Built local-host identity:192.168.1.1 %ASA-6-302013: Built inbound TCP connection 13 for inside:192.168.1.10/61194 (192.168.1.10/61194) to identity:192.168.1.1/443 (192.168.1.1/443) %ASA-6-725001: Starting SSL handshake with client inside:192.168.1.10/61194 for TLSv1 session. %ASA-7-725010: Device supports the following 1 cipher(s). %ASA-7-725011: Cipher[1] : DES-CBC-SHA %ASA-7-725008: SSL client inside:192.168.1.10/61194 proposes the following 11 cipher(s). %ASA-7-725011: Cipher[1] : DHE-DSS-AES256-SHA %ASA-7-725011: Cipher[2] : AES256-SHA %ASA-7-725011: Cipher[3] : DHE-RSA-AES256-SHA %ASA-7-725011: Cipher[4] : DHE-RSA-AES128-SHA %ASA-7-725011: Cipher[5] : DHE-DSS-AES128-SHA %ASA-7-725011: Cipher[6] : RC4-MD5 %ASA-7-725011: Cipher[7] : RC4-SHA %ASA-7-725011: Cipher[8] : AES128-SHA %ASA-7-725011: Cipher[9] : EDH-RSA-DES-CBC3-SHA %ASA-7-725011: Cipher[10] : EDH-DSS-DES-CBC3-SHA %ASA-7-725011: Cipher[11] : DES-CBC3-SHA %ASA-7-725014: SSL lib error. Function: SSL3_GET_CLIENT_HELLO Reason: no shared cipher %ASA-6-302014: Teardown TCP connection 13 for inside:192.168.1.10/61194 to identity:192.168.1.1/443 duration 0:00:00 bytes 7 TCP Reset by appliance %ASA-7-609002: Teardown local-host inside:192.168.1.10 duration 0:00:00 %ASA-7-609002: Teardown local-host identity:192.168.1.1 duration 0:00:00
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Apr 23, 2012
I have an ASA 5505 with the base license,When I setup the DMZ interface I had to add the deny access to the inside VLAN. The DMZ works fine with WiFi on it, but user's iPhones can't get email unless they turn WiFi off.Is there a simple way to allow HTTPS traffic through the DMZ interface to our internal Exchange server which is NAT'd on the 5505's external IP?
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Aug 5, 2008
I have an ASA 5505 that I am using to connect my contractors to via an inside interface, the outside interface is my private LAN. I have setup on our corporate Proxy server to allow traffic from my outside interface of my ASA to go to the internet without credentials BUT log internet activity. The question is I want to know if the ASA can send that http & https traffic to my proxy server and all other traffic to my default route? I want to be able to send all internet traffic to my proxy server. This will avoid me asking the contractors to place proxy credentials in their browsers.
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Nov 24, 2011
Configuring an asa 5505 with 8.42 software.I need to access an https server on the inside via the outside interface. have moved the http server enable to port 10443.Tried to make a "network object nat rule"
object network Vejrstation nat (any,outside) static interface service tcp https https object network Vejrstationnat (any,outside) static interface service tcp https https.
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Jan 20, 2013
I have installed a new ASA5510 with CSC, and everything is working properly except the access to websites using https. All sites/access to them seem to be blocked by the ASA. I have read that this access is by default enabled and I have tried to add configuration to allow https access to the firewall but without success. [code]
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Jan 17, 2013
i am unable to launch ASDM, and access https:// to run Asdm..everything worked find yesterday but now for some reason it wont work?When i am trying to log in with the asdm it just hangs on the connecting to device... please wait...When i am tryng access the https://... i get the ssl do you want to trust.. and i press proceed anyway and i get an error
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Asa 5510
Device manager version 6.1
System image file is "disk0:/asa804-k8.bin
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Also i am accessing the asa with ssh without any issues
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Mar 27, 2013
I am attempting to set up failover dual ISP on a 5505 running 8.4(4) with the Sec Plus license. Everything i have been able to reference so far, points to old commands not available or relevant in 8.4
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For instance:
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global (backup) 1 interface
global (outside) 1 interface
nat (inside) 1 0.0.0.0 0.0.0.0
route outside 0.0.0.0 0.0.0.0 20.20.20.1 1
route backup 0.0.0.0 0.0.0.0 30.30.30.1 10
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What is the new syntax that should be used to mimic these commands? I have the sla and trach reachability configuration already set up.
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Mar 19, 2013
I am trying to configure an IPSEC vpn on an ASA5505 I setup an SSL vpn and it works fine, I can browse to the https: address log in and connnect to servers However when I try to setup the ipsec client access vpn it will not connect and I am getting the errors below I used the wizard for the initial configuration Looks like the inital IKE is being blocked or dropped?
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%ASA-7-710005: UDP request discarded from my external IP/35781 to external:ASA-external/500
%ASA-7-710005: UDP request discarded from my external IP/35781 to external:ASA-external/137
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Sep 14, 2011
I have a firewall Cisco ASA 5505, and currently it is a command line firewall. I want to configure ASDM so that i can use it as a GUI Web Base interface.I really don't know what to do. How can I configure ASDM on my firewall.
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Nov 15, 2011
I want to configure my Cisco asa 5505 as a dns server, so that when i configure any of my network systems ip address and use my firewall as a default gateway and dns ip, the system should be able to browse internet.
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Mar 20, 2012
Got new ASA5550, code 8.2.2 in flash, can't configure "nameif" or "ip address" on the interfaces: [code] These are all the options that I get! Another weird thing I noticed is "<system>" string in "show ver" top line: [code]
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Mar 18, 2012
I am absolutely new in the enterprise firewall world but I would like to start learning how to configure ASA 5505 and 5510. I did some research myself and I found that the material or the topic itself is a huge adventure (lots to read and understand). My company uses IOS versions until 8.2 due to the differences in the NAT-ting rules with 8.3 and 8.4.
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Mar 25, 2013
I have a test ASA 5505 at home. The DHCP IP address in my real home firewall is 192.168.1.x and as you are aware the default ip address in ASA is the same. how to configure the ASA.
In the link below there is an instruction, it seems it is working for everybody except me. I followed the instruction up and the only change was assigning the IP address, which I chose something other than 192.168.1.x But after the step of creating NAT, I do not have access to the internet. [URL] Also I followed the link below, but the revision of the ASDM in the instruction does not match with mine, so I was not lucky to figure the device.[URL]
1- How can I configure the ASA 5505 with an IP address different than 192.168.1.x (at home = no incoming static IP address = DHCP on subnet 192.168.1.x for the incoming internet) I have installed ASDM 6.3 on my laptop (From work) but when I connect to the ASA it wants to install ASDM 5.7.I tried to connect to the device through ASDM 6.3 and input the IP address 192.168.1.1It takes for ever and it does not connect to the device
2- How can I connect to the device by ASDM 6.3 or any ASDM with higher version than the original of the device?
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Dec 23, 2011
I want to configure multiple DHCP pool on ASA. that I create like
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int e0/2
no shut
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interface Ethernet0/2.10vlan 10nameif inside10security-level 100ip address 192.168.10.1 255.255.255.0
interface Ethernet0/2.20vlan 20Â Â Â Â Â Â nameif inside20 security-level 100ip address 192.168.20.1 255.255.255.0
dhcpd address 192.168.10.10-192.168.10.254 inside10dhcpd dns x.x.x.x y.y.y.y interface inside10dhcpd enable inside10
dhcpd address 192.168.20.10-192.168.20.254 inside20dhcpd dns h.h.h.h z.z.z.z interface inside20dhcpd enable inside20
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I have following query...
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1. int e0/2 work as trunk port, is it? any special confiduration require other than dot1Q?
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2. How can I configure inside interface? is it like,
   access-group inside_access_in_1 in interface inside10
   access-group inside_access_in_1 in interface inside10
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3. How can I configure static NAT ?
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4. How can i configured inside route?
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5. How can I configured default NATing?
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6. On which interface I access ASA? currently using inside interface.
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May 20, 2012
I have ASA 5505 with 8.4(2)8 software for one of my branch offices and I can't configure port forwarding.It seems to be very simple, but it's not working. I use my ASA as a gateway to the internet for users in office and for site-to-site IPSec VPN to HQ. I have pppoe-enabled outside interface, but ISP gives me static routable ip address. I have server behind my firewall and I should "publish" to the WAN some of its' tcp and udp ports, but I see that no packets forwarded through ASA. I tried to configure PAT as stated in official "Cisco Security Appliance Configuration Guide" through CLI and ASDM.[code]
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Nov 1, 2012
I am trying to configure an ASA 5505 with a username and password. I set all the pass words: [code]
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When I reload the device it prompts me for the username, then the password and it fails and just asks for the username again. I have even tried to delete the username / password combo but it still prompts me for it. When I do password recovery the confreg is 0x00000001.
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Sep 16, 2012
[URL] I am not savy configuring ASAs at all and I can't get it to work. We are switching to a SIP trunk phone system and I am in charge of setting up the ASA to not only make it work but also make sure that there's packet priority or QoS.I've never configured something like this and I was giving another set of instructions to make sure that this is working:
[URL]
Configuration:
My configuration is very basic:
3 interfaces - Outside/Inside/Guest
ASA Version: 7.2(3)
ASDM Version 5.2(3)
Firewall Mode: Routed
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Solution: When I tried following the instructions on brian-kayser's blog I get an error when I'm sending the following command:
shape average
^Â Invalid marker
service-policy PRIORITY-POLICY
^ Incomplete commandÂ
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I think it's because my version of ASA doesn't have this functionality but I don't know.
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Jun 10, 2011
I am setting up a Cisco ASA 5505 first time for My organisation, I usually setup Cisco Router, I have 10 Static IP, & Have 6 Server (S-1, S-2, S-3, S-4, S-5, S-6), Traffic Should be pass through the ASA and is distributed to the destination server that is specified in the packet. LAN servers can be separated into discrete networks for security. For example, a private LAN for internal traffic accessed only via remote dial-in VPN sessions and Want to Configure DMZ for Server (S-4, S-5, S-6) that allows public web traffic.
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I have Attached My Network Diagram I have some question,
1:- Can we Configure Multiple Static IP On ASA 5505 ?
2:- If Diagram is wrong what change need to be done ?
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Nov 20, 2011
I am now going to configure IPSec VPN connection for Cisco ASA 5505 (Version 8.4)
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Nov 30, 2011
ASA 5505 and DMZ, I have a Base License.
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What do I need to do for access inside network to DMZ?
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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 31, 2011
How can I configure an ASA 5505 NEM client to allow access to the Internet when the tunnel to the headend is down? I am planning on deploying back to back ASA 5505s in network extension mode but I do not want to block Internet access on the client side if the tunnel to the server should go down.
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Apr 30, 2013
I'm trying to support a friend. They just switched to TWC Business Class from Megapath. They have a Cisco 5505 ASA and are trying to configure it to work with the new TimeWarner cable modem. But we can't get PCs behind the firewall out to the Internet.
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We think it should be a pretty simple config. They have the ASA connected directly to the modem. The modem is running DHCP, and we''ve configured the ASA to get its address via DHCP. We have a Windows server behind the firewall; it can't get out the Internet either. It's set up to be a DHCP server and is giving IP addresses to the PCs on the network.
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Laptops connected via wifi to a wireless router attached to the modem are able to connect to the internet, thus we know the modem is up and running fine.
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Here's our running config:
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ASA Version 8.4(1)!hostname ciscoasadomain-name opanslab.comenable password yYME2neTGgA0S1./ encryptedpasswd yYME2neTGgA0S1./ encryptednames!interface Vlan1nameif insidesecurity-level 100ip address
[Code].....
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Dec 23, 2011
Currently I have an ASA setup as a Firewall with 1 outside interface and 2 inside interfaces. Initially, the Guest interface was setup to receive DHCP from the ASA and everything was working. I'm adding router and a server for the guest interface and what I'm trying to accomplish now is the following: ASA 5505 > Airport Extreme with a public static IP (69.xx.xx.6), handling DHCP and NAT > Mac Server as DNS Server.Right now, when I connect to my Airport Extreme with any computer, I don't have internet. I don't understand what's wrong. My DNS Server has a reserved IP address: 192.168.226.2 and it's pointing to itself and forwarding the ISP DNS servers, the Airport Extreme is handling the DNS Server IP and the ISP DNS Server IP but I can't connect to the internet from the server. [code]
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May 9, 2012
We've just started with the ASA 5505. We do run a DHCP server on the inside interface, so it is in the same VLAN 1 as all of the clients. However, we cannot get it to work.We can't use DHCP Relay, as the ASA 5505 only allows to relay to DHCP servers in a different subnet.Or do we have to move the DHCP server to a different subnet. If so, how would we configure that scenario?
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Aug 30, 2011
I'm trying to learn Cisco ASA IOS commands, I have bought myself a 5505 ASA for my home network and plan to implement it. How best to configure it.
I have attached a diagram of how I want my network to look. The internet connection is via the Virgin Media cable modem.
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Jul 3, 2011
I have upgraded gss to version 3.2(0) because I need to track a server that uses only https.I configured a https head KA VIP answer type but the answer never goes on-line.I tried using url... as the VIP address but not go online too.The gss is behind a firewall.I suspected of the firewall but from the gss CLI it seems that the firewall is open for the https traffic: [code]
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Nov 4, 2012
This is my first time to use the Cisco ASA 5500 family. I have a request from a user to create an access rule, to allow all LAN traffic to Destination IP address 165.241.29.17, 165.241.31.254 with Destination TCP port 5060,5061,5070 and UDP port 50000-52399.
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