Cisco Firewall :: ASA 5510 - Dual Internet Connections / Routing DMZ Traffic
May 29, 2012
I am having an issue when implementing an additional internet connection on our ASA 5510. The new connection is "TWCOutside". I was my understanding that static NAT would force our externally hosted servers (Email, PPTP VPN, and FTP) to continue to utilize the "ATTOutside" connection. Our remote site-to-site VPN traffic has two static routes configured to force it to continue to use the ATTOutside connection.When I switch the metric on the 0.0.0.0 0.0.0.0 98.103.148.145 route to 1, and change out default dynamic xlate to use "TWCOutside", it "mostly" works as expected. Email, the PPTP VPN server, and our remote site-to-site VPN server continue to use the ATTOutside connection as designed. Our end users begin using the new connection for thier internet browsing.
However, our FTP server, in the DMZ, completley loses outside access. It cannot ping to 8.8.8.8, or resolve DNS queries. The is a static NAT statement for this server, as it is using one of our dedicated public IP addresses. I need it to continue to do so for the next few weeks.Effectivley, we just want to give our end users internet browsing on the new TWC link, but leave everything else on the old ATT link for the time being. The only problem I am having is the DMZ connection. I am currently "rolled back", so no one is using the new connection until I figure this out. I can easily switch the metric and dynamic PAT back to using the TWC connection, but I need to have some things to try with the DMZ before doing so. [code]
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Jul 1, 2011
I need to know how to setup my ASA with dual wan links. 1 is 10/10 fiber, other will be a 50/5 Cable Wideband link. The 10/10 fiber is currnetly being used for VPN's and Internet, (about 20 point to point IPSEC vpn's currently).
I want to add the Wideband link and use the "Tunneled (Default gateway for VPN traffic)", feature for the current fiber link and the new Wideband link for any other internet traffice. I tried this however as soon as I set my fiber link to "Tunneled (Default gateway for VPN traffic), I lost all connectivity.
I also setup my "VPN" link with the "tunneled" option and my "INTERNET" link with a default route to the internet. This would only let me ping internet sites from the ASA device but not from client computers, also the VPN's would not come backup.
I have tried the sla setting with a DSL line for failover and that works good, i've since got rid of the DSL and want to utilize 2 wan links for different purposes/traffic.
ASA 5510, SSM-10 1GB RAM
ASA version 8.4(1)
ASDM Version 6.4(3)
Context Mode Single
FW Mode Routed
License Security Plus
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May 22, 2011
We have an ASA5510 and we're currently using 1 internet connection to handle our site-to-site VPN connection and our internet traffic. We have a second internet connection on hand. What we would like to do it use BOTH internet connections: (1) will be dedicated to our VPN connection, (1) will be handling all our internet traffic. How can we get this setup? We're running Software Version 8.4(1)
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Nov 29, 2011
Context:1- My company has one ASA 5510 configured with Site-to-site VPN, Ip sec Cisco VPN and Any Connect VPN.2- We use ASA to connect to the single ISP (ISP 1) for internet access. ASA does all the Na Ting for internal users to go out.3- A second link is coming in and we will be using ISP 2 to load balance traffic to internet (i.e. business traffic will go via ISP1 and “other” traffic will go via ISP2).4- A router will be deployed in front of the ASA to terminate internet links.5- No BGP should be used to implement policy (traffic X goes via ISP1, traffic Y goes via ISP2). Questions:How do I get this done, particularly, how do I tell the router, for traffic X use ISP1 and for traffic Y use ISP2? PBR is my friend?Since I will be having 2 public Ip Addresses from the 2 ISPs, how do I NAT internal users to the 2 public Ip addresses ?. Finally, which device should be doing the Na Ting? The ASA just like now or move Na Ting to the Router?
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Apr 5, 2013
Is it possible to have a Cisco ASA5510 with two internet connections performing as follows.
Internet A---------All traffic except LAN to LAN vpn
Internet B---------LAN to LAN vpn
I cant find anything definitive on google to say it will or wont, i know it cant do policy based routing.
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Aug 1, 2011
We are in the process of getting two new connections pulled in that I would like to utilize in the following configuration.
DS3 - 45/45 I would like to use this circuit for all of our servers to NAT out of as well as our VPN tunnel to our remote site. It will be much more reliable than our cable line.
Cable Internet - 50/10 I would like to use this for all internet traffic that users generate. I would like to be able to fail over to the DS3 if this line goes down.
To get all traffic go out the cable line would take a dynamic NAT rule and a default route. How would I automate a failover to the DS3 with a backup route and dynamic NAT rule?
I understand that if the DS3 goes down it will take manual intervention to bring the tunnel back up and servers with static NAT will need reconfiguration.
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Aug 4, 2012
I have a 5510 with me. I want to terminate two Internet links on that. The primary Internet Leased Line to access my DC network using Site-to-Site VPN, and the secondary ADSL connection to access my other location network via VPN and and for web browsing. How can I achieve these goals.
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Apr 11, 2013
I am in the process of configuring a ASA 5510 to replace an older PIX. This change is part of migrating to a new ISP, so the process is complicated by the existence of two outside interfaces. I have virtually everything working, but there is a requirement to be able to access hosts from the internal networks using both their private IPs and their public IPs. The older PIX took care of this silently with little configuration, but the ASA has me twisted on the details. Some of the hosts with public IPs are on the internal network and some are on a DMZ (not my design, inherited). For the internal ones I implemented hairpinning to take care of the requirement, but I am having trouble with the DMZ based hosts.. Since there are two external interfaces each internal host has two IPs and two static NAT rules to handle incoming traffic from each external interface.
The routins and dynamic NAT entries we have in place take care of accessing the hosts using their private IPs on the DMZ, but I cannot figure out how to get the public IPs to work from the internal network. It seems like a simple Static D-Nat shoudl do it, but when I add a Static D-Nat on the DMZ the public IP works, but the private IP breaks.. Is there a way to get them both to operate ?
Network layout looks like this (IP ranges altered):
DMZ 172.10.0.0.0 Class C
INTERNAL 10.0.0.0 Class C
Outside 1.2.3.0 Class C
Outside2 2.3.4.0 Class C
[code]....
After applying it I could access the public IP (1.2.3.50) from the internal network, but I could no longer access the DMZ IP (172.10.0.2) from the internal network. Is there any way to get this configuration to allow access to both IPs from the internal network ?
The problem here is that there are website links based on the public IP and the DNS is split so DNS returns the internal IP to users. As a result both need to be accessible from the internal network.. Not my favorite design, but the client (or in this case the boss) is always right so I need to get it working somehow.
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May 19, 2012
We have a site with two inbound circuits, one for internet and one for our MPLS. Each circuit is being terminated by a 2921 Router and matching ASA 5510 Firewall. For the internal network, the Internet ASA's inside interface (172.16.0.1) is the default gateway for all hosts. OSPF is the routing protocol between all the routers and ASA's and routing is working. In fact, ICMP is working as well. From an inside host (172.16.0.81), we can ping anything on the MPLS network. But when I try to use telnet (for example), the connection fails. If I add a route to 10.10.10.0 to the host, or re-configure the host to point to the MPLS ASA (172.16.0.254) as it's default gateway, connections will establish.
Both ASAs are running 8.4(3), and have the following commands:
same-security-traffic permit intra-interface
interface Ethernet0/0
nameif outside
[Code]....
And from the MPLS nodes, I can see a tcp request is made.
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Nov 30, 2012
I have been at this for the past few hours now. I just cannot get this device to pass through traffic to the internet. Here is the basic topology:
Default Gateway (ISP): 208.118.125.129/29
IP of outside int (e0/0): 208.118.125.130/29
ip of inside int (e0/1): 10.1.1.1/24
igniteCSGfw(config)# sho run
: Saved
:
ASA Version 8.0(4)
[Code].....
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Apr 20, 2011
We are using an ASA 5510 as our gateway to our ISP. All of our VOIP traffic is sent to an Internet SIP provider for our outbound calls. Our pipe to the Internet is 100Mbps metro ethernet. I am trying to find a way to provide QoS for this traffic so that I can reserve 20Mbps of the available 100Mbps pipe for VOIP traffic.From what I've been able to figure out so far I would use a combination of priority queues and traffic policing. However, it seems that this is nearly impossible to accomplish because I cannot control the remote device that my ASA connects to because it is the ISP device. I could police traffic on the inside interface of the ASA. However, lets say that a client on our network starts downloading from an Internet host and the downloaded traffic saturates my Internet connection. I could police this incoming (from the Internet) traffic on my outside interface of the firewall. This would drop the packets but the bandwidth would have already been used by the time it reaches my firewall.Would the fact that I'm policing incoming traffic on my outside interface cause the sender to throttle down their transmit rate because packets are being dropped? Would this achieve my goal of guaranteeing available bandwidth for my VOIP traffic by not allowing other traffic to saturate the link?Most documents I find regarding this topic describe providing QoS for VOIP traffic traversing a VPN connection in which case you could configure both end devices.
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May 17, 2011
We have Cisco ASA 5510 256RAM running 8.2.4 with CSC 6.3.1172.4, it slows down internet traffics drastically when we do speed test, we get something like this, It the computer is bypassing the CSC, it gets This was done when there's very low traffic on the LAN and CPU is low usage on the CSC. The CSC has been re-imaged also but still doesn't solve the problem.
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Jan 15, 2013
I need to route to sub nets form 2 different ASA interfaces. The ASA also has an outside interface works like gateway for internet access. Here is my configuration:
ASA Version 8.2(1)
host name ICE3
names
interface Ethernet0/0
name if outside
security-level 0
ip address 201.199.xxx.xx 255.255.255.248
[Code]....
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Aug 25, 2011
What we are trying to accomplish here use two ISP's (one cable and one T1), use the Cable line for site-to-site VPN and use T1 line for all internet traffic. We currently use the following configuration: Cisco 2820 routers terminating the T1 -> HP switch -> Cisco AS 5510 port 0 -> port 1 to LAN switch (Nortel 5510)We want to force all VPN traffic (using 10.0.0.0/24 subnets - 10.0.1.0, 10.0.2.0, etc) through a cable connection, perhaps on port 2 of the ASA, then all non VPN traffic goes to the T1.
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Jun 28, 2011
We are now using a ASA 5510 firewall and we would like to configure a internet load balance traffic in our environment.For example, some IP addresses go through local gateway for internet routing but some address go through VPN tunnel gateway.
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Jan 27, 2013
I am wondering if this is possible. We have multiple internet connections with fixed IP's coming into the office. We'd like to use one for FTP backup and another to service our websites. From what i have read a 5510 doesn't do policy based routing, but we'd like to configure our ftp server to use one of the internet pipes and our webserver to use another internet pipe. Is that possible?
We'd have two outside fixed IP interfaces and two internal interfaces. I could then use one of the internal interfaces for the web server and the other for the FTP server. consequently if the internal web server and FTP server use the fixed IP"s corresponding DNS server wouldn't that effectively route all FTP traffic out one interface and all web traffic out the other?
Then the FTP traffic would be NAT'ed to an internal interface and the HTTP & HTTPS traffic would be NAT'ed to a separate internal interface.
Then if each of the internal servers used the corresponding internal NIC on the ASA as it's gateway and the fixed IP's that correspond to the external DNS server, then it would affectively only use that gatway out for traffic? Would that work? Does it should route traffic out those pipes correct? Will the asa support two different next hop routers for the two different interfaces?
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Mar 20, 2011
One of my remote sites acquires Internet connectivity via a cable modem service. This goes down intermittently, of course. I would like to purchase DSL service from the local telco and configure the edge ASA (currently a 5505) to use the cable modem path normally ... and fall back to the DSL path if necessary.
These seems hard to do. The edge box would need to evaluate the viability of a WAN path using some set of tests ... perhaps pings to a handful of major Internet sites. If all those pings start failing, it would stall for a minute, to give the WAN service provider time to recover ... then cut over to the second path. Cutting to the second path might mean pushing new DNS server addresses to clients (or perhaps the edge box would hand out both sets of DNS servers all the time and rely on the clients to try them all.) Once the cable modem provider restored service, the edge box would stall for a while (ten minutes? an hour?) and then cut back.
I'm willing to replace the edge box with something fancier (a bigger ASA or something sold as a router or whatever), although I'd like to stay under 10K (list) for such a replacement.
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Feb 11, 2012
i have come across this solution to dual internet connections, c2950-i6k2l2q4-mz.121-22.EA14.bin is the IOS and the router is a 2950 Dual Wan model. I don't know alot about this stuff I'll admit, but it is on the default configuration with IP 192.168.27.7 255.255.255.0, gateway at 192.168.27.8. The hostname below is something I don't know exactly what it means but my guess is its the line at the command prompt with the name.
It has VLAN1 with fa0/1-24, gi0/1 - 2.
This is the script but I don't know why its not taking the commands as at ip sla monitor 1 I get invalid command error. What do the ! mean are they comments and not entered?
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Dec 25, 2012
I just upgraded from RV-042 to RV-042G on 24.Dec.
My previous connections are : (1st) 100Mbps ISP connection, (2nd) 200Mbps ISP connection (fibre to home)
Before upgrade, my RV-042 worked very stable.
After using Migration Tools by exporting RV-042 current config and converted to V3 configuration, the converted configuration was imported to RV-042G.
In beginning, RV-042G woks fine after imported converted configuration file. Unfortunately, after around 1 hour of use, my iPad (through an Apple Airport Extreme Station) and wired PC could not browse internet.
But, port-forward to 3 IP-cam still be able to access by my iPhon4 through Carrier 3G connections.
After a reboot of RV-042G, internet connection comes back. But, after an hour of use, the same issue happened again.
RV-042G makes me fluctuated. I will fallback to RV-042 from now on and wait for any further firmware improvement from Cisco/Linksys.
My previous RV-042 and current RV-042G config:-
* WAN1 : 100Mbps ISP connection
* WAN2 : 1Gbips ISP connection ( 200Mbps max throughput)
* LAN1 : connected to Apple Airport Extreme
* LAN2 : connected to Linksys 16-port FastEthernet switch
* LAN3 : idle
* LAN4 : connected to an Intel i7 PC
* Dual WAN link mode with bandwidth management, all internet connection from PC will stick on WAN2
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Jun 7, 2011
I'm trying to set up a S2S VPN between two ASA5505 SP units running ASA Version 8.2(1). I've ordered additional ADSL2 lines to handle this traffic and I'm having troubles with the configuration for the additional PPPoE connection. Here is are extracts from my current config; First the interface vlans
!
interface Vlan1
nameif inside
security-level 100
ip address 192.168.1.1 255.255.255.0
[code]....
The result being that I can ping the OUTSIDE interface, but get no reply from the VPN interface. I've checked ADSL lines, they are up. The two PPPoE sessions are logged in and active. I can even see the ICMP packets hit the VPN interface, but there is no reply.
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Jan 5, 2012
I have 2 Isp's connected to my Asa 5510 running 8.4.4 Ios. Can I route Dmz traffic out one Isp and my regualr traffic out the other Isp?
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Jul 31, 2012
I have an ASA 5505 current f/w & the security plus license (to get the 3 nameif interfaces). Can I split traffic between two ISPs, (VPN traffic to one destination on a T-1 on one VLAN, and all other traffic using DSL to another VLAN) and using a different nat policy on both? I know load balacing isn't supported, only failover. I was just wondering if there was a way to make this work.
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Jun 13, 2011
My remote office staff are stating it takes "forever" to open simple work/excel files.I think forever really means more than 5 seconds.My main office has a 5510. I have a brand new server in place here that my remote offices vpn into.
Those remote offices have 5505.
Each office has a dsl connection. Their download speeds range from 7mb to 10 mb and their upload speed are 0.5 mb to 0.8 mb.My first thought was to add a second dsl line to my main office. Then have dsl line #1 serve my main office and office 2.Then have dsl line #2 serve offices 3, 4 and 5.
Would this speed up the opening speeds of my remote offices?If so how challenging is adding the second dsl line into my 5510?
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Jul 13, 2011
I have existing Sonic FW in my company we are moving from sonic FW to ASA 5510 Security plus lice. I have two ISP currently connected to sonic Firewall I am planning to implement Dual ISP configuration on ASA5510.
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Apr 2, 2013
I have a dual ISP, 1 primary and 1 secondary terminated on fa0 and fa2 on our ASA respectively. ASA was configured so that, when the primary fails, the secondary kicks in. [code]
It was until yesterday that we experienced downtime on the primary ISP that the secondary doesn't do the fail-over. I have to manually configure the device to use the secondary ISP. Currently, I'm looking at maybe this has something to do with the licensing.We are currently using a Base License, should we be upgrading to Security Plus?
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Sep 2, 2012
I have just set up a Cisco ASA 5510. It basically only contains the settings provided in the startup wizard. It however does not let through traffic from the internal interface to wan 2 (wan 1 is not connected yet but traffic should also be able to go there).
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Sep 12, 2011
normaly the agents has a persistent connection with the kaseya server (monitoring server),The connection re-established afther the next check-in of the agent, instead of a persistent connection. Now we need to wait to the next check-in before we can connect to the agent. This is a big performance issue, the check-in time of the agents are 3 minutes.I see a lot of the following messages in de syslog:
6Sep 12 201120:27:48302013customer site527985721Built inbound TCP connection 5418112 for outside:(customer site)/52798 (customer site/52798) to inside:kaseya server/5721 (outsideIP/5721)
6Sep 12 201120:29:09302014customer site527985721Teardown TCP connection 5418112 for outside:(customer site)/52798 to inside:kaseya server/5721 duration 0:01:21 bytes 45 TCP FINs
I create a normal static nat rule from the kaseya server to a public ip address, and i define the protocols in de secutiry policy.ICMP has been allowed.cisco asa details:System image file is "disk0:/asa824-k8.bin" This platform has an ASA 5510 Security Plus license.It's look like a connection time-out between the agents and our cisco asa.
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Dec 5, 2012
Our Cisco ASA 5510 running 8.4(4)1 just started dropping packets and our AnyConnect clients are seeing horrible performance. The system is extremely slow compared to just a couple days ago.Nothing has changed on the system. I can post the configs if needed.
firewall# sho int
Interface Ethernet0/0 "outside", is up, line protocol is up
Hardware is i82546GB rev03, BW 1000 Mbps, DLY 10 usec
Full-Duplex(Full-duplex), 1000 Mbps(1000 Mbps)
Input flow control is unsupported, output flow control is off
Description: == WAN Interface ==
[code]....
I have done a "sho vpn-sessiondb detail svc" and I can see the dropped packets of the individual users, but cannot see why the packets are still dropping.how I can correct this and restore speeds?
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Nov 28, 2011
I have a classical "inside + DMZ + outside" configuration.I also have a mail server in DMZ which have to be allowed to reach any destination on the outside (internet) at least on the SMTP port, of course.If I make an access rule that allows traffic from that server to "any", everything works fine, but doing so the server is allowed to reach any destination, including what is behind the inside interface (internal network).I didn't find any other option to tell the ASA machine to allow any destination, but on the outside interface only.I do believe is possibile to have the ASA to allow any kind of traffic from a host on the DMZ to the outside interface only, but I didn't figure out how.
P.S.: I'm using a 5510 machine running version 8.2
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May 20, 2011
Just wondering if there are any methods or commands, natively, in the asa5510 for determining all traffic in to and from a certain server passing through the asa. This would be without a syslog server or something similar.
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Mar 11, 2013
Core Internal Network -> Cisco ASA 5510 -> DMZ Switch.If i send a ping reguest from internal network to servers in DMZ Switch over the ASA 5510, i can see a delay in response, some times this delay can be more than 80ms, this is a problem for the web applications in http traffic.How i can find what's happening on my ASA? I disable the inspect traffic over the IPS, disable the policy maps below, reload the two boxes, but doesn't works, the problem still persists. [code]
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Mar 27, 2011
I'm currently using ASA 5510 with software 8.4.1 and I have an issue with nat configuration. I used the following config line:nat (inside, dmz) source dynamic LAN Pat1 destination Server1 Server1
The traffic is not flowing and when I use Packet Tracer, packets are dropped at the NAT rule with the following error: Drop-reason: (acl-drop) Flow is denied by configured rule.The only ACE I have is permit ip any any.
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Jun 11, 2013
I have an ASA with an outside ACL that is configured to allow 208.84.248.95 SIP/5060 to 1x.x.x.46. I show no hits. I added an ACL to do a packet capture, it sees the packet coming into the ASA but not going to the Serv Prov interface. I see hits on the vuong ACL but not the production acl_out ACL.. What is up?
NOTE:ACL_out is the ACL we use to allow outside traffic to enter our network.
FW1(config)# sh access-list | i 1.x.x.46
access-list acl_out line 1 extended permit ip host 63.x.x.140 host 1x.x.x.46 (hitcnt=0) 0xc09a9387 (*NO HITS)
access-list acl_out line 658 extended permit udp host 208.84.248.95 host 1x.x.x.46 eq sip (hitcnt=0) 0x0f327179 (NO HITS)
[code]...
It was tested and verified from the inside network to make sure the server is listening on that port. Below we created an ACL to allow all IP from another test PC to the Server IP 1x.x.x.46. We did a telnet to port 5060 and it showed hits but not on the acl_out ACL.
ccess-list vuong line 1 extended permit ip host 63.x.x.140 host 1x.x.x.46 (hitcnt=0) 0x2759fa92
FW1(config)# q
FW1# capture capture1 access-list vuong interface outside
[code]...
Below we applied the same ACL to the ServProv interface to see if traffic was going where it was supposed to . By trying to telnet to the 1x.x.x46 IP from 63.x.x.140 IP. Looking below, no traffic appeared on the capture2.
FW1# capture capture2 access-list vuong interface ServProv
FW1# sh capture capture2
0 packet captured
0 packet shown
[code]...
Capture 1 above shows the last 3 incoming messages initiated from 63.x.x.140 to the 1x.x.x.46! Vuong ACL belows shows 3 more hits.....nothing on the acl_out ACL???
FW1# sh access-list vuong
access-list vuong; 1 elements; name hash: 0x29df3e90
access-list vuong line 1 extended permit ip host 63.x.x.140 host 1x.x.x.46 (hitcnt=6) 0x2759fa92
[code]...
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