Cisco Switching/Routing :: ASA 5510 Routing Specific Traffic To Inside Router
Nov 7, 2012
I have an ASA 5510, with Ethernet0 connected to Internet via a T1 line, Ethernet1 connected to LAN1, and Ethernet2 connected to LAN2. LAN1 & LAN2 are independant, but share the Internet connection, via the T1 line. On LAN2, I have another router that connects to the Internet, via a Comcast line. I wish to route some of the traffic on LAN2 (10.38.77.0) to the other Router, on LAN2 (10.38.77.12) (connected to the Comcast line). I have entered the following lines:
route inside2 10.11.0.0 255.255.0.0 10.38.77.12 1
route inside2 10.252.0.0 255.255.0.0 10.38.77.12 1
route inside2 172.22.6.0 255.255.255.0 10.38.77.12 1
I can trace the routes from the ASA 5510 (1st hop is to 10.38.77.12), but not from anything else on LAN2.
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Oct 10, 2012
Have a quick question regarding inter-vlan routing on a 3750. Overview of network is ISP --> ASA --> 3750 (acting as my core and default gw). I have 5 vlan interfaces on my 3750, all w/ 192.192.x.x subnets, a 6th w/ 192.168.100.x, and a 7th w/ 192.168.200.x. I have enabled "ip routing" on the switch and can successfully ping from subnet A to subnet B as long as both devices are using the correct DG for their vlan, which is the switch. I have a few ports that are trunked as well that go to ESX hosts which break out the vlans according to the subnet the vm should be attached to. The ASA is set to nat internal traffic for all the vlans.
Now my question: short of applying an ACL to each vlan interface to block traffic from other 192.192.x.x subnets is there a better way to accomplish this? I want my 192.168.10.x subnet to be able to reach all the subnets, but don't want 192.192.10.x to be able to talk to 192.192.20.x for example. I was thinking to create an acl like this:
access-list 120 permit ip 192.192.10.0 0.0.0.255 access-list 120 deny ip 192.192.0.0 0.0.255.255 192.192.10.0 0.0.0.255access-list 120 permit ip any 192.168.100.0 0.0.0.255 192.192.10.0 0.0.0.255
and then applying this to the interface for the appropriate vlan.
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Sep 24, 2012
I inherited a Cisco ASA 5505 and am trying to piggy back the device off of an established Network. Here is the basic layout:
192.168.10.1 (Core Router - Handles DHCP/DNS)
192.168.10.9 (ASA 5505 - Piggy backing off of Network)
192.168.40.x (ASA 5505 - VLAN)
I'm able to get onto the Internet without any problems. Devices from the 192.168.10x Network can not ping the inside VLAN1 (192.168.40.x). However, I would like traffic going from the inside VLAN to the Outside VLAN to be blocked, except for 192.168.10.1 and 192.168.10.9. I've tried using ACL's but end up killing my Internet connection. 192.168.10.1 is the default route and is how I get out to the Internet. Is this possible? Essentially, I'm trying to set up a small Network that guests can connect to. The idea is that they can get to the Internet, but that is it. They can't get to internal resources on the 192.168.10.x Network
Here is the config:
ASA Version 8.2(1)
!
hostname ciscoasa
enable password EeCsulrpu.9LalEE encrypted
[Code].....
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Nov 27, 2012
I want to know what is the best way to black traffic inside the same VLAN, this VLAN is a user VLAN, it means that I am talking about access layer.I wanted to use private vlan, but C2960S doesn't support this feature. Any other way to prevent any to any traffic in the user vlan, this vlan only have to speak at the Layer 3.
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Nov 2, 2011
Is it possible to configure the span(switch port analyzer) port and restrict it to only listen to ingress and egress of TCP/1433 from the source port?
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Jul 7, 2012
How to configure traffic flow between computers inside VLANs and a routed port? Here is the setup details:
1. Switch 3750-X
2. VLAN 100 - ( SVI IP address 192.168.100.1 /24)
3. VLAN 200 - ( SVI IP address 192.168.200.1 /24)
4. routed port gi1/0/48 (IP address 192.168.150.1 /24). Note: this port is directly connected to a firewall ASA 5520 port IP 192.168.150.100 /24
Ip routing is enabled on the switch and inter vlan traffic is flowing ok. I can ping the routed port gi1/0/48 from any computer connected in the VLAN 100 or 200. For example computer with IP 192.168.100.25 can ping the routed port 192.168.150.1. Switch can ping firewall port 192.168.150.100 and the 'sh ip route' command shows the network 192.168.150.0 /24 as directly connected network.
any computer in the two VLANs CANNOT ping firewall ASA port 192.168.150.100 Is it because inter VLAN routing does not work with a routed port on L3 switch? I looked up fallback bridging, but it is meant for non IP traffic.The goal is I am trying to set the ASA port as an internet gateway for VLANs.
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Nov 1, 2012
I have a VPN on my ASA 5510 between (A)192.168.255.0/24 and (B)172.20.2.0./24. The purpose of the tunnel is to send kerberos tickets from our domian controller on the A side, across to a server at B, and receive a respose. I want to lock down inbound traffic to the A network, but not sure of best method.
I initially tried using an ACL filtering on ports, but soon realised the incoming traffic uses a wide range of ports so this is not really possible.Seeing as the A side will always be initiating the conversation, I was wondering if I could use the 'established' option on the inbound ACL for the ASA at A side, so that it would block any flows that are not initiated by the A side.
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Jul 7, 2011
I have two ethernet adaptors on my windows machine. OS is Win-XP.I am running ADSL broadband on LAN1 and on LAN2 I am accessing applications on our company's WAN. LAN1 is on 192.168.1.0/24 subnet and LAN2 is on 10.68.104.0/22 subnet.Accessing application through LAN2 involves DNS that is located distantly, therefore routers are also in picture.Problem is that while accessing the application that run on the network of LAN2, I have to disable LAN1. Otherwise the traffic goes on LAN1.
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Nov 18, 2011
One Host on inside network needs to access customized application hosted on Internet. Its a customized application run on port 80, 443, 5000-to-50020
How do I allow this host access for this specific application. I got ASA 5510 and host is in the inside network, we also got an ACL on inside interface to have control.
-Host IP on inside network - 172.16.30.15
-Application to access - 74.219.x.x
-Inside ACL name - inside-acl
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Mar 16, 2013
I have ASA 5510 8.4 Firewall where more than 20 Site to Site VPN Clients are configured on it. how to see the traffic for one Specific Site to Site VPN.Actually this site to site vpn is always keep dropping for every minute. I'm sure its a problem at the other end.The remaining 19 VPNS are UP and working without any problem. How to see the traffic for specific vlan.More over we dont have any syslog server in our network. Is their any chance we can check the traffic on the firewall?
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Mar 6, 2012
How to force traffic back out the same interface from whence it entered. Review the following topology.
Internet ---> ASA 5510 ---> Static IP1 ---> F3.1 ---> 1811 F0
|-------> Static IP2 ---> F3.2 ---> 1811 F5 ---> VLAN Int
ASA F3.1 10.1.254.9/30
ASA F3.2 10.1.254.13/30
1811 F0 10.1.254.10/30
1811 F5 10.254.1.14/30
When pinging the public IP of ASA F3.2 from the internet a reply is never received because the default route on the 1811 points to ASA F3.1.
How do I get the replies from the 1811 to go back out the same interface from whence it entered ? I am sure the answer is policy-based routing, but not sure how to write the config.
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May 22, 2013
I am attempting to filter a specific host(s) from my OSPF routiing table on a ASA 5550 (ABR) using LSA prefix lists. However, when I look at the other routers in that area, I notice that ALL LSA type-3's are being removed (10 hosts are now missing from the routing table). I have verified the filter is working on the ABR, but I can't figure why ALL hosts/routes that were coming into the area are now being filtered instead of the specific one that I want to filter out.
Here is the config on the ABR:
prefix-list pdm_pl_000 seq 10 permit 206.253.180.137/32
!
!
router ospf 1
network 10.0.0.0 255.255.255.0 area 0
network 10.150.10.0 255.255.255.0 area 10
network 10.150.252.0 255.255.255.224 area 10
[code]....
The 206.253.180.137 host is actually coming from Area '3'. Am I doing something that is removing all type-3 LSA's?
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Feb 22, 2013
I have a cisco 2821 router where as a cisco 2960 switch with connect on router as a trunk & one user vlan . this is my WAN router all traffic are internal . i have 2MB data connectivity on my WAN side. i have to Give a specific Bandwith on my SAP traffice . like when SAP traffice will come they all time get around 50 % bandwidth of my channel. If SAP resuest are not comming then other traffice will get full bandwith .
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Jan 24, 2013
configuring a switch or a router to limit the bandwidth for a specific user/IP when need it. Most of my remote offices are configured like this:
Users ------ 3560 switch ------- 2801 router -------- T1 to NOC -------- 7204 router with channelized DS3
I use Netflow Analyzer for high bandwidth usage alerts and can see the user's IP right away when someone is clogging our T1s. My goal is to be able to temporarily limit the bandwidth of the user taking over the T1. Whatever is best switch config or on the router.
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Apr 20, 2013
open specific ports on 1941w Integrated Services Router.This specific router is a wireless VPN router that has a wired module and a wireless module and VPN so I'm getting 3 subnets on my network - 192.168.1.. for the wired connections, 10.100.1.... for wireless LAN connections and 10.100.2... for VPN remote connections.I know that by default all connected computers can access my Linux server data through telnet so the telnet port is open by default, the problem is that I have some other software licensing system on my Linux box that needs to be accessed through port 27000 and most of my users are using wireless connections and can't access that license because post 27000 is closed.what is the comand to open this post or any other port that I need to be open on the wired module, wireless module and VPN or at least poit me to somewhere where I can find all the commands that I can use for this router?
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Mar 6, 2013
Headquarters has an ASA 5510 (8.2.5) and each of the branch offices has an ASA 5505 (8.2.5).
Currently, internet traffic from the branch offices is routed straight out to the internet, while traffic destined for HQ is encrypted over the the VPN tunnel.
We use a Websense v10000 G2 to filter web traffic for our HQ site and the branch offices use Websense Hybrid filtering (a pac file in their browser - cloud based filtering).
One change we are considering making is to route ALL traffic from the branch offices through our Headquarters to they can also be filtered by the v10000 G2, rather than using the Hybrid Filtering. The Branch Offices typically have 6Mbps/768Kbps DSL connections.
What are there negative consequences of routing all traffic through our HQ? HQ has enough bandwidth to accommodate the increased traffic from the branch offices but I was wondering how the branch offices would be affected? Originally I was thinking that the Branch Office download speeds would essentially be limited to the speeds of their upload speeds because all traffic would be getting sent up to the Branch Office. After thinking about his more though, I don't think this would actually be the case. You would lose a little bit of speed due to the encryption, but it shouldn't be that drastic, correct?
Also, what configuration changes would be neccesary to achieve this? Here is the NAT/Route configuration of one of my branch offices:
crypto map CDEOVPN 35 match address CDEO
crypto map CDEOVPN 35 set peer 24.XX.XX.251
crypto map CDEOVPN 35 set transform-set Main
crypto map CDEOVPN interface outside
access-list CDEO extended permit ip 10.124.0.0 255.255.0.0 10.0.0.0 255.0.0.0access-list NoNAT extended permit ip 10.124.0.0 255.255.0.0 10.0.0.0 255.0.0.0
global (outside) 1 interfacenat (inside) 0 access-list NoNATnat (inside) 1 0.0.0.0 0.0.0.0
route outside 0.0.0.0 0.0.0.0 71.X.X.51 1
I considered changing the the CDEO access-list to access-list CDEO extended permit ip 10.124.0.0 255.255.0.0 0.0.0.0 0.0.0.0 but I was afraid that maybe the VPN tunnel wouldn't be able to be established without first adding a deny statement so that traffic destined for the Public IP of our HQ ASA wouldn't try to go over the tunnel? Would any changes be neccessary to my NAT rules?
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Apr 2, 2012
We're in the process of swapping in a new pair of ASA5520s and Catalyst 3750s to support two separate business units. We want Firewall A and Switch A to handle traffic for Org A (VLAN 100). Similarly, firewall B and Switch B should handle traffic for Org B (VLAN200). But we want to be able to fail traffic over in case of firewall or switch failure. Traffic between the two Orgs is being routed at the switch level. [code]
The uplink interface on each switch is currently a routed port with a static address on the uplink subnet. This works fine in a normal state. However, when we fail over one of the firewall contexts to the other chassis, this results in the inability to route internal traffic because the internal interface is now physically connected to a different switch with a different IP port address (obvious in hindsight). The question is, rather than a routed port, what would be the proper way to handle traffic between the switches and firewalls in a failover scenario? If I make the uplink ports into trunks, won't this cause all packets destined for either firewall to hit both both? Seems like that's not the way to go either? [code]
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Oct 3, 2010
We've got a cisco 2821 router which periodically stops routing all traffic. It seems to happen about once every 2 weeks, and I can't find anything that could be causing it. There are no entries in the log and the router stays up and running but requires a restart to begin processing traffic again. We're running 12.4(13r)T11.Any thoughts, or troubleshooting steps to track this down?
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May 29, 2012
We have a Catalyst 6509 switch, and we hope to use policy based routing to redirect http traffic to my proxy server, where I can find the configuration example?
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Feb 21, 2013
I have an 891w as my edge device for my home office. I have a VLAN for family use (wired and wireless) that routes out to the internet just fine. I have a second VLAN assigned to a VPN tunnel that backhauls traffic to my corporate network (wired and wireless) and all of the traffic gets to the corporate network fine when I am on that VLAN.
However, while I am on the VPN VLAN, no traffic gets to the internet. I believe it is because I have the gateway of last resort (0.0.0.0) set to the WAN IP address provided by my ISP, so DNS is resolving against corporate, but because there is no specific route, it is trying to dump the traffic back out the WAN without traversing the VPN tunnel.
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Apr 19, 2012
I got ASA 5510 with base license, can I block all Peer-2-Peer traffic from inside to outside.
ASA Giga 0/0 connected to ISP Router 2811
ASA Giga 0/1 connected to LAN switch 3560
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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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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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Aug 9, 2012
I’m looking for some specific parameters of Cisco 1941 and not able to find them .
1. Maximum number of DHCP clients2. Maximum number of DHCP pools3. Maximum number of V LANs on trunk port.
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Oct 6, 2012
I have mobile users using air cards that connect to the network with a VPN product called Net Motion. Our firewall is a ASA 5510. Once connected to the Net Motion VPN server the user will get a DHCP address from our network. In the past we could not get the VPN tunnel to complete since our layer 3 switch (3750G IP services) has 3 egress points and the egress point that we needed the VPN traffic to go out of is not the default gateway. To solve this we had the air card carrier set switch our air cards to static IP addresses and using route statements for the public IP addresses and access lists we got it to work.
The problem with this is that every new air card we provision needs a static IP address. My question is would policy based routing work in this scenario? The problem has been that the VPN tunnel was not able to complete the negotitaion phase as the traffic came into the switch and was trying to go out the default gateway. The VPN client wont get an internal IP address until the VPN tunnel is created.
I would like to get away from using static IP addresses.
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Mar 18, 2013
when plugging a Cisco 7060 to the specific switch port it does not power on. The inline power consumption is abnormally high compared to the other phones that are plugged in, maybe double the amount.
non Poe devices work on the same port.
I used multiple cables and phones.
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Feb 9, 2012
I have Catalyst C3750G switch
with configured route to subnet 192.168.201.0/24
ip routing
ip route 192.168.201.0 255.255.255.0 192.168.160.13
192.168.160.13 is accessible
[Code].....
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May 20, 2013
I have arequirement where in I need to allow only specific vendor made desktops/laptops to be connected to the switch and block the rest. Say I want only the HP made Laptops to be connected on the Network. and block all other vendors. such as dell, ibm etc.
I am having Catalyst 4500 switches in My network. i tried using the mac access list using the permit and deny statement and then mapping the access list to the vlan access map and then filter using the vlan id. But this doesnt work on cat 4500....the same I tested for 2950 switch and it works perfectly. are there any restrictions on 4500 or any extra configuration has to be done.
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Oct 7, 2012
I have a network with 3 segments and a 2921 router.v172.16.5.0/24, 172.16.0.0/27 and 172.16.2.0/23 .
I want to block all 135 TCP traffic from/to IP 172.16.5.5 to any host in other segment, but only TCP port 135 and only to the specified IP.
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Mar 25, 2012
I have an environment where i have two nexus 7010 switches, along with 2 nexus 5510's. I need to run OSPF as a layer 3 routing protocol between the vpc peer links. I have 1 link being used as a keep alive link, and 3 other links being used as a VpC link.
1) Is it best to configure a separate Vpc VLAN i.e 1010
2) Is it best to configure a vrf context keep-alive
3) just have the management address as the peer ip's.
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Mar 12, 2012
I work at a small company and have very limited experience with networking We have an ASA 5510 that connects out to our ISP. The inside interface is connected to a port on a Trendnet Switch (where all of our clients are connected as well)using 192.168.0.0/24 We also have a Linksys wireless router connected to one of the ports on the Trendnet in which it (wireless router) receives an IP via DHCP from the ASA. I know this isn't the best setup so I would like to connect the wireless router to one of the interfaces on the back of the ASA and have it able to communicate with the 192.168.0 network without any restrictions. Is this possible to setup? If so can it be done using the ASDM?
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Nov 20, 2011
Is there a way to use the "no switchport command to enable routing on a port and yet sequester it from traffic on other vlans within the switch?
The switch in question is a 3750E
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May 23, 2013
we are using 7609 router. it forwarding traffic to wards my firewall which was not allowd in my router. when ever im checking for routes in router using show ip route x.x.x.x its showing SUBNET IS NOT IN TABLE, but in workmy firewall dropped connection i can able to see that networks.
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