Questions tagged [cisco-asa]

Cisco's Adaptive Security Appliance (ASA) which combines functionality from the PIX, VPN 3000 series and Intrusion Prevention Systems (IPS) product lines

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25 views

Ikev2 ipsec issue between Asa and sonicwall (issue resolved) but need understanding

Really need your help Need help in understanding an issue faced when creating a tunnel between Asa and Sonicwall (Issue got resolved) still need help to understand. SonicWall: Phase 1 Ikev2 Encryption ...
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483 views

How can I generate a self-signed certificate with a hash other than SHA-1 on cisco ASA?

I have a Cisco ASA 5508-X with IOS 9.6(1), and I have Apex licenses for AnyConnect which support Suite B, NGE. How can I generate a self-signed certificate with a hash other than default SHA-1. For ...
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12 views

DATA & VOICE VLAN ROUTING BETWEEN 2 ROUTERS [closed]

Good Afternoon All- I would appreciate a little help with a current issue I am facing... I can ping all Network Segments, all Routers, all Switches, and all Servers on the network. PROBLEM IS: I CAN'T ...
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2answers
18 views

Concurrent site-to-site VPN tunnels through dual ISPs (with 2 couples of Cisco ASA) between same devices

I currently have a simple site-to-site VPN setup, connecting machines from site 1 to site 2 through 1 ISP, using a set of ASA 5506X. All is good. I'd like to "double" that setup for ...
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20 views

Cisco ASA drops packets which match crypto acl. What the reason? [closed]

I've some problem with IPSEC tunnel between Cisco ASA and Fortigate. For some reason, packet 10.12.4.0/12 to 192.168.0.0/16 drops by ASA, despite the fact 192.168.0.0/16 is present in crypto ACL. Can ...
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61 views

Cisco site-to-site VPN tunnel Failed to find a matching policy [closed]

I have PaloAlto (PA) and Cisco ASA 5585-X located on two different sites, trying to configure IPsec VPN tunnel. [PA]-----------(internet)-----------[Cisco ASA] If i ping from Cisco ASA side lan to PA ...
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1answer
223 views

Arpping responding with Cisco ASA interface mac address and mac address of machine

For some reason our Cisco is responding to arp requests between machines on the same switch. It's not breaking anything but it is slowing initial connections. I've been making a lot of changes on the ...
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1answer
49 views

VPN with Cisco virtual ASA on Azure not routing correctly

I've deployed a Cisco virtual ASA in Azure to use as a VPN server. For simplicity, I'm using just the management interface as the lan for the time being (10.2.0.4 is the interface). I want to use the ...
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25 views

Does modifying a ASA tunnel create a downtime?

I inherited a cisco ASA, I never really had to manage one before. But, I need to modify an existing tunnel to add IP addresses to both the local and remote traffic selector, specifically there are ...
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1answer
103 views

Can a server on the other end of a site-to-site vpn be exposed (NATd) to a public IP on an ASA

AWS DataCenter ----------- site-to-site VPN ------------ http server <=======================> Cisco ASA public address 10.0.1.59:443 ...
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Cisco FTD DHCP option codes

I have a Cisco ASA 5515-X that is currently running ASA with the FirePOWER module, which cannot sent option code 60 in the DHCP request. My ISP requires me to send this. Does anyone have FTD 6.4 (or ...
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1answer
43 views

Setup NAT Rule for service group

We have a Cisco ASA 5515 and I am having trouble setting up the proper NAT rule to route a group of services from a public ip (which is already routing some single ports) to an internal ip. I am ...
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19 views

How to configure ZPF with Tunnel?

I am trying to configure ZPF in a Cisco 4331 router in Packet Tracer. I have a tunnel interface for GRE tunnel in this router. But I am not being able to assign this tunnel interface to any zone due ...
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3answers
945 views

can a cisco ASA be configured as a DHCP server for a VLAN on a subinterface? and route packets between VLANs?

We are in the process of planning to phase out a Sonicwall tz205 in our office. i am hoping to replace it with a CISCO ASA 5516 specifically. We have three networks in house the main production ...
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1answer
79 views

Cisco ASA 5516-X Wont communicate on inside interface at all. No packets

I'm configuring a brand new ASA and the Firewall refuses to communicate on my inside interface. No matter the traffic type, its denied by implicit deny every time. I was hoping to get some feedback/...
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2answers
135 views

connecting two ISPs to my network

Hi My network has the following resources: 3 ASA-5505 w/site-to-site VPN's newly acquired c801F-K9 router Exchange Server 3 ISP's (soon to be 2) A t-1, DSL, Satellite. VOIP Cisco Cme My goal is to ...
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3answers
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How can I find which natted private IP address is communicating on Cisco ASA 5508

Normally we are facing abnormal traffic targeting specific servers. My question is How can I know which private IP address is targeted since we are using Dynamic NAT on Cisco ASA 5508 Firewall? ...
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33 views

Single public IP routed to multiple internal IPs by port [closed]

We have a network setup with a Cisco ASA 5515,IPS firewall running ASA 9.8(4)29 and ASDM 7.12(2). I have several rules setup to route public ip addresses and specific ports to specific internal hosts....
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2answers
230 views

Cisco ASA and a Router?

I'm trying to understand networking and when looking at the different routers, firewalls and switches, I came across Cisco ASA which many use for firewall and routing abilities, so if you use an ASA ...
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4answers
6k views

Subinterfaces on ASA5506-X doesn't communicate with the switch or computer

We are upgrading from ASA5505 to ASA5506-X, but unlike the ASA5505, the new firewall ASA5506-X doesn't have switch ports and does not support vlans on physical interfaces. So, I'm creating vlans on ...
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2answers
568 views

Options for setting up a DMZ and internal network with an ASA 5505 and a single switch

This is an attempt to clarify my original post which was too long. My task is to add a DMZ to our network. Currently, the internal network is connected to one ASA interface. I have been able to set ...
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24 views

ASA ping outside to inside private ip's?

i am new asa and cisco as well , what i am trying to do to perform this lab , only 1 issue is there , i need help in it, i can ping from pc0 to router0 in other way I can ping inside to outside , but ...
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2answers
2k views

Keep Cisco site-to-site tunnel up permanently

I have Cisco ASA site-to-site tunnel with remote and which i don't have control. I have following config: crypto ikev1 policy 10 authentication pre-share encryption aes hash sha group 2 ...
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2answers
2k views

How to keep an ASA tunnel up for lifetime?

We have a Cisco ASA and at the remote end I have no idea what the device is. This is what happening: When I send a packet or generate interesting traffic, it brings up the tunnel and everything ...
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60 views

Users after login are redirected to the ASA AnyConnect download page rather than connecting to the VPN

Several users after logging in are redirected to the ASA AnyConnect download section instead of connecting to the VPN. We try to log in via Web or AnyConnect application by using SAML Identity ...
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1answer
36 views

Cisco ASA 5506-X: clients periodically lose Internet access

Clients periodically lose Internet access, but I can connect to Cisco ASA and manage it. If i am ping sites, it works: Minsk# ping yandex.ru Type escape sequence to abort. Sending 5, 100-byte ICMP ...
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4answers
12k views

How do you block bit torrent traffic with a Cisco ASA?

I have referenced an old external Cisco article on how to block Bit torrent traffic referenced on-line Here This procedure I have found only works 50% of the time. I find blocking bit torrent ...
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2answers
1k views

IKEv2 tunnel between ASA and Mikrotik

Trying to move from pfSense to Mikrotik for an office router, and the only stumbling block is maintaining a site-to-site IPSEC tunnel between it and our Cisco ASA. The settings all look correct to me, ...
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1answer
39 views

Site to site ASA Routing question

I am doing a lab about DMVPN and Site to Site ASA integration. There is no problem in the DMVPN. However I have problem in establishing route from Site to Site ASA to DMVPN. The router on the left is ...
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2answers
8k views

Why do I get a timeout when I connect via ssh to a Cisco ASA, even though management and ACLs are configured?

I set up a Cisco ASA 5505 8.4(3), and specified ssh version 2 enabled ssh access to the WAN interface via ssh <my network> <mask> <WAN interface> allowed ssh from my network via an ...
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122 views

Cisco ASA 5585-x Failover Virtual MAC address

I have configured Cisco ASA 5585-x with Active/Standby mode, cisco best practice saying you should use Virtual MAC address on interface to avoid traffic disruption when you do failover. now question ...
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24 views

Windows L2TP VPN issues when accessing Site to Site VPN on Cisco 5506

We have two Site to Site VPNs and Remote Access VPN configured. Using the builtin IPsec client on OSX all subnets are accessible however when using L2TP built in client on Windows 10 ICMP traffic ...
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Cisco ASA NSEL Template IDs 256-271: Is there a list of names and functions? [closed]

I am trying to interpret Cisco ASA NSEL data, which I understand is similar to Netflow v9 but uses biflow records along with static data templates. I see data templates 256-271 in template frames, and ...
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2answers
85 views

Connecting an ASA behind an AT&T router/gateway

I am attempting to setup a temporary network for a company in transition that is moving into a new building. They just bought and had installed an AT&T business internet connection. They have a ...
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3answers
500 views

What is the difference between an ASA firewall and UTM firewall?

How do ASA firewalls and UTM perimeter firewalls differ?
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1answer
38 views

What is method to switch group-policy on a tunnel-group upon user login?

We have ASA units that have tunnel-groups that have a particular group-policy defined via default-group-policy statement. This initial group-policy ("NOACCESS") is one that prevents any ...
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1answer
43 views

Much ARP requests from Cisco ASA 5510

An employee of the ISP writes to me that a lot of ARP requests from us go to them. ISP equipment log: 07:47:27.732242 ARP, Request who-has AAA.BBB.CCC.213 tell AAA.BBB.CCC.53, length 46 07:47:27....
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30 views

Site to Site VPN between Cisco ASA and Aruba Virtual Gateway

We have hosted an Aruba Virtual Gateway on AWS. All the configurations are done as per the documentation of Aruba VPNC. Through AWS security policies, UDP 4500 is open on AWS side. We want to ...
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4answers
12k views

TCP Handshake fails on Cisco ASA

I am using a Traffic Generator for setting up a TCP connection that should pass a Cisco ASA firewall. My topology looks like this: +------------------+ ...
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2answers
19k views

Cisco ASA: Unable to establish IPSec tunnel with IKEv2: Auth exchange failed

This is a Cisco ASA 5515-X with software 9.6(3)20. The remote side didn't tell me what they use, must be Strongswan or something. Using the following debug commands debug crypto ipsec 255 debug ...
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150 views

Cisco ASA 5506: Adding two public IP's that are on the same subnet for the primary and backup interface

Im programming a Cisco ASA 5506. I need to add a primary (public) IP that is x.x.x.82/24 and a backup IP that is x.x.x.81/24. The ASA wont allow me to do this as it gives me an error: "the IP ...
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3answers
97 views

Static NAT and PAT

I have two private IP addresses, want to make them NAT to 203.0.113.0/2 public IP address. WAY 1 : Static NAT (2 ip addresses NATted to one by manually) WAY 2 : PAT (Router gives port number ...
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1answer
2k views

2-stacked switches with 2 uplinks to each ASA

My current single uplink from 2-stacked switches to ASA is not enough to cater the link utilization (upload traffic from the 2-stacked switches to ASA). So, I have thought of using 2 uplinks. If I use ...
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1answer
2k views

Ping LAN via Anyconnect VPN

I'm trying to configure the VPN on a Cisco ASA 5510. I can connect to it without any problem and I can ping my switch (172.16.1.2/24) but I can't ping the gateway (172.16.1.1/24) nor the Google public ...
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2answers
3k views

Manage Cisco ASA Firepower ASDM

Cisco recently made available Firepower management via ASDM along with Firesight VM. I am using ASDM to manage and I am unable to see "Create new policy" under Configuration->Asa Firepower ...
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1answer
32 views

Cisco ASA: What is the best way to restrict access of nodes in the same network to each other? [closed]

There is a network with five nodes on one interface. These nodes should not be accessible to each other. An option is to use an ACL, but is there another way?
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1k views

Cisco ASA IPsec tunnel QM FSM error

I am setting up Cisco 5585 ASA for IPsec tunnel with one of cloud company. we already have lots of tunnel for various cloud provider and life if good but recently this tunnel giving me hard time to ...
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3answers
2k views

Block usage of proxy server

I am network administrator in a small company. Until recently i used the Cisco ASA to prevent the employees from surfing facebook, youtube... But now they are using proxy server to overcome this. Any ...
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3answers
68 views

Cisco ASA Port Forwarding

I am trying to set up port forwarding on my Cisco ASA security appliance. I have tried several tutorials and can not seem to get it to work. The ASA is set up behind my internet providers gateway. ...
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1answer
686 views

Cisco anyconnect VPN router specific public IP via tunnel

I have fully functional cisco Anyconnect VPN running on Cisco ASA5585-X and today i got requirement that there are some remote public sites we need to whitelist our VPN public IP to access them over ...

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