The Cisco ASA (Adaptive Security Appliance) series of products provide Firewall and VPN functionality.

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Multiple Computers Running IIS with a Singular Public IP how to handle incoming communications?

At our company, we have three separate servers that house IIS currently. Each of these three servers have the same public IP address and essentially reside on the same network under different subnets. ...
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25 views

Cisco ASA firewall blocking requests to internally hosted DNS server

I have a DNS server behind a Cisco ASA firewall. The Cisco firewall is performing NAT. When inside the network, I can NSLOOKUP directly to the server. When the client is external, requests time out. ...
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2answers
40 views

Cisco Easy VPN - Port forwarding needed at remote end?

I was in the process of setting up a site-to-site ipsec vpn tunnel behind a mobile broadband router when i found out that i wasnt able to port forward on that network so i wont be able to use the ...
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43 views

WatchGuard Authentication equivalent with Cisco ASA X series

I am in the process of implementing Cisco ASA 5512-X devices with FirePOWER to replace WatchGuard firewalls. The WatchGuard devices in use are currently wrapping access to various services with a ...
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3answers
53 views

Cisco ASA NAT - internal host see its public ip

I have a server hosted by a provider which uses Cisco ASA to do nat. The problem I have is that the internal server that is nat-ed with a public ip will see its public ip as source ip. This basically ...
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49 views

Cisco vpn access to another router

I am using a Cisco ASA 5505 to VPN into my network (which is working great), and I want to connect to a different network that is on a Asus RT-N66v. For example: network 10.1.1.1 is my VPN and ...
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1answer
39 views

Cisco asa 5505 w/ seperate subnets and seperate isps

I am trying to join two networks together thru the asa. I have a 192.168.0.1 network that is the main domain and has its own isp and is administered by windows server 2008 for DNS and DHCP i also ...
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1answer
71 views

Cisco ASA - difference between inside_access_in and inside_access_out?

So a minor problem we have is any internal servers have no (non-icmp) access to the outside is being blocked. Our current config is: inside_access_in any ---> any ---> icmp inside_access_out ...
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80 views

Route Email to external IP Cisco ASA 5515

I have a cisco ASA 5515X with two WAN connections and one LAN connection. As far as I understand, I hace the firewall configured to allow SMTP traffic through WAN2 interface, but not through WAN1. ...
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1answer
65 views

Can I use ASA5505 to spoof the reply to a heartbeat request?

I have a CISCO ASA 5505 in a home office. It has two subnet, public and private. There is a wifi belkin router on the private net, which provides wifi for some users. That belkin router sends out ...
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1answer
110 views

NAT Rule changes from ASA software 8.0 to 8.4

I have an Access Rule and a NAT rule that works fine with on the Security Appliance Software Version 8.0 The rule is as follows: However, I am having trouble making the same rule work on an ASA ...
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75 views

Include multiple sub-interfaces in Cisco ASA for VPN tunnel

I am trying to create a VPN tunnel between two Cisco ASAs where one ASA has multiple sub-interfaces. Say, In Cisco ASA 5550, I created multiple subinterfaces with VLAN ID as below: Inside, int0/1 : ...
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2answers
65 views

ASA is not forwarding packets to egress interface

We are seeing some very strange behaviour from our Cisco ASA 5505 running 9.1(2) We have a SIP PBX inside our network. It's got a bit of an odd configuration, it listens for inbound SIP requests for ...
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2answers
190 views

High number connections coming from an IP

On our corporate network we're detecting workstations opening too many connections to the IP address 75.126.196.159 (port 3478) causing the Cisco ASA Firewall 5550 to detect a "SYN Attack" and reach ...
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1answer
155 views

Cisco ASA 5510 needs “clear arp <Interface>” periodically to reach a single host

ASA 9.0(3) The symptom is that I can ping from the ASA to any other host in that interface's subnet, save one particular host (that host can ping the interface on the ASA however). If I do "clear arp ...
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1answer
58 views

Secondary IPs on DMZ machines not working

I am moving some virtual machines from my DMZ in a bladecenter over to my new cisco UCS. We are using Hyper-V, and are running Server 2012 on the old bladecenter, and Server 2012r2 on the new UCS. ...
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54 views

ASA 5515-X: Policy based NAT for dedicated uplink

We have bought a Cisco ASA 5515-X and we have the following scenario. Current situation: GigabitInterface 0/0, IP via DHCP, ISP1, Coax, 100M up / 12M down, medium latency GigabitInterface 0/1, ...
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98 views

Amazon AWS Site-to-Site VPN doesn't allow concurrent pings

I have some strange behaviour with an AWS VPC site-to-site set up and would like some help to understand where my problem might be. Set Up I have a VPC with a private and public subnet, there is a ...
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1answer
61 views

vpn connection is OK but can't route some IPs

Our Network is laid out as in the diagram below PC1 can successfully connect to server 2 (with 10.120.20.x/24), and PC4 can successfully connect to server 1 (with 10.120.30.x/24). Our problem is ...
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108 views

Cisco ASA 5505 - IPSec remote VPN accessing secondary subnet

Layout: modem (pass through) -> Cisco ASA 5505 (Lan 192.168.10.1) -> (Wan 192.168.10.2) Netgear N600 Router (Lan 10.1.10.1) -> workstations (server=10.1.10.34) VPN connection to ASA no problem. I ...
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3answers
53 views

How to see traffic traversing a Cisco ASA by inside host?

I have a Cisco ASA 5515 running 9.1 and am interested in learning how I can see bandwidth usage by individual hosts. For instance, using MRTG I can see that my average bandwidth utilization is approx ...
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1answer
762 views

Cisco ASA VPN: Drop-reason: (acl-drop) Flow is denied by configured rule

During VPN reconfiguration we have met quite big issue with VPN traffic not passing to peer. Using packet-tracer we have have got following debug: Phase 1 to Phase 9 passed successfully. [...] ...
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1answer
83 views

Force Cisco ASA to change source port NAT

I have a 2 devices, a Cisco ASA and sitting behind it another device. Both the Cisco and the other device have IPsec tunnels but to different locations. I need to ensure that the source port of the ...
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1answer
202 views

cisco ASA 5505 l2tp vpn

I have a problem with cisco asa 5505 vpn configuration. I set l2tp for windows clients. I can connect to vpn but: when i have "use default gateway on remote network" on NIC enabled i have access to ...
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258 views

Configuring ASA 5510 for multiple port-forwarding using TCP-UDP service group

I'm currently trying to configure two different ASA 5510s to properly forward all ports used in h323 video conferencing to the proper video conferencing equipment setup on the internal network on each ...
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2answers
76 views

Routing between 2 networks and 2 routers

I have a WatchGuard XTM33 and a Cisco ASA 5505, current network is running off of the Cisco and I want to eventually migrate over to the WatchGuard using new IP scheme. ASA 192.168.111.1/24 WG ...
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2answers
216 views

Static public IP issue on Cisco ASA 5512x

This is our scenario: We have an Cisco ASA 5512x and we have 2 different Internet connections from different ISPs connected with it. ISP A is being used for the users browsing traffic(normal ...
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36 views

Lync Server 2010 remte users can not use audio or sharing features

Lync Server 2010 - no sip phones, but audio within the application Inside Audio/Video/Conferencing works Recently we were asked to turn on Remote Access (not federation) since users have leared ...
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2answers
147 views

How can I connect to a Cisco ASA5540 from Windows Server 2012 over IPSEC?

Given a windows server 2012 client (which I have under full administrator control), and an external Cisco ASA5540 router (which I don't), I'd like to connect to the router to access their internal ...
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41 views

Route AAA LDAP traffic from ASA through IPSEC-tunnel to Windows DCs

We have one Cisco ASA 5505 in our HQ responsible for connect our remote office with a IPSEC-tunnel and one ASA 5505 at the remote office. The Cisco ASA 5505 in our HQ is also responsible for VPN users ...
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1answer
195 views

How to set up Cisco AnyConnect VPN Client to only tunnel traffic for specific destinations?

I have an Ubuntu server that needs to be able to connect via Cisco AnyConnect VPN to another server for one of our applications. However, because we're using this server for multiple applications, we ...
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222 views

Cisco ASA not allowing DNS traffic to pass?

I have an ASA 5515 as my internet firewall. It is not allowing me to do NS Lookups from any internal DNS Servers, or clients. If I set my nslookup server to 8.8.8.8 (google DNS), I can resolve public ...
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1answer
40 views

Input traffic spikes on outside interface at same time every day

For the last two days I've had this issue where our internet connection SLOWS to a crawl and is almost unusable. I logged into our Cisco ASA 5500 (not very well versed with it) but I was able to see ...
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49 views

ASA/AnyConnect will only allow 53/udp to the DNS servers listed in the profile

I found a "bug/feature" in Cisco AnyConnect/ASA 5510: if a VPN client makes a query to udp/53 (DNS query) to any IP address that isn't listed as a DNS server in the VPN profile, then ASA drops this ...
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112 views

Broadcom NICs, Cisco ASA and ARP request collisions

First of all I am sorry for my english mistakes. Help me please to solve the problem with ARP request collision incidents. I have IBM BladeCenter E chasis with blade servers are installed in this ...
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130 views

Cisco ASA 5525 and multiple internet interfaces

I'm replacing a firewall this weekend with a pair of ASA 5525's. The network configuration is as follows :- Inside LAN - 192.168.1.x Internet 1 - 62.0.0.x Internet 2 - 52.0.0.x The currently ...
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1answer
44 views

How do I allow data to span from port to port on a Cisco ASA [closed]

I'm running a Cisco ASA5520. I could have sworn I had this set up when I installed the system and checked the right boxes in the "Wizard" in Cisco's ASDM, but data only goes from port to port if it ...
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31 views

Tracking connection route with POST data

I have PHP running on client machines. They connect to a webserver using fopen and upload information stored in local databases. Everything works great, except for one group who uses AT&T cell ...
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1answer
91 views

TightVNC over VPN encrypted? [closed]

I'm using tightvnc to connect to my servers over a IPSEC VPN connection with split tunneling enabled. Is my communication with my servers via VNC encrypted or unencrypted?
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32 views

Is setting an access rule any to any permit the same as the implicit rule?

I have the default setup of outside=0, dmz=50, inside=100. I'm trying to allow the machines on the inside network to talk to each other over a certain port, but a packet trace shows that the acl is ...
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62 views

How To Stop Cisco ASA Spoof Attack

I have thousands of "Deny TCP reverse path check from 10.60.60.X to 10.60.6X.X on interface outside" The IP addresses for the source and destination hosts are all over the board, and the interface is ...
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157 views

Cisco ASA 5500 8.4-9.0 Port forwarding SIP

My setup is with an ASA using software version 9: PhoneServer - at IP 10.111.9.2 ASA firewall IP 10.111.9.1 and second interfaceIP 192.168.9.2 which connects to a Telco router having IP ...
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1answer
438 views

Cannot RDP from inside to dmz

I'm running an ASA 5505 with security plus I have internet access from the inside and dmz vlans I can Remote Desktop from inside to another machine on the inside I can ping inside machines and ...
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3answers
374 views

VLAN planning and questions

I currently manage an environment with IP addressing of 10.10.10.x/23. We have 3 VLANS set up, and I use that term very loosely. The reason I say I use the term loosely is, the 3 VLANS have full ...
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1answer
469 views

Cisco ASA 5500 - SIP ports other than 5060

Is it correct that the SIP inspection in the ASA 5500 firewalls only kicks in for traffic on port 5060? There is some hint at this, while not 100% definitive, on Cisco Docs - ...
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131 views

ASA failover mode switching from Active/Active to Active/Standby

We have two ASAs with failover set to Active/Active. This seems to work fine for everything we do except using VPN connections. It seems whenever the primary ASA fails over that all VPN connections ...
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35 views

Cisco ASA5505 Public IP Address

I am trying to configure a Cisco ASA5505. I am using the GUI start up wizard. When I assign the outside IP address to be a public IP address the configuration will work but after about 30 seconds the ...
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30 views

Firewall Ports for Toshiba CIX server

Other then SIP ports: 5060 and 5061 what other ports need to be opened to have a phone set up in a satellite office with via external IP address. Phone Server CIX100 Firewall ASA 5510
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1answer
387 views

Cisco ASA Outside to Outside NAT (forward from one public ip to another public IP)

I have an ASA (A) with a set of public IPs (A1..A6). And I have another server S with a public IP (S1) . I want all traffic to A2:22 NATed (forwarded) to S1:22. (SSH is just an example here) If ...
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118 views

Cisco ASA 5505 Access Rules/NAT

I need to allow traffic from any IP to a specific port in an ASA 5505 using ASDM 7.1. I've already created an Access Rule to do this but I ran a Packet Tracer and it gets dropped due to an "implicit ...