Monitoring of VPN traffic
If a user connects using the AnyConnect client, and then connects via RDP to an internal Windows machine, I'd be able to see all traffic via syslog from the RDP session? I can see the client login, auth, DHCP, then the port 3389 in order to connect to the internal area of Windows, but only once the connection on port 3389 traffic (and subsequent termination of the VPN session at the request of the user). It seems that there is a kind of traffic through the ASA to the VPN client, at least at the level of the presentation layer. Asked me to look at this to determine if a person was actually connected and work or if they have just connected to make it look like they were doing their job.
Also, in the same sense - is there a difference shown when a session ends for max of the session and a user actually disconnection? The reason why I ask this question is the above user has been connected for exactly 12 hours, which is the Max connection time (720 minutes), but the newspaper it says was by the request of the user. My guess is that it was a max session timeout but I have to be positive about that.
Thanks in advance...
If the RDP user in a device, the activity that takes place during the RDP session would be from this device to other applications. When you're talking about syslog, I guess you see syslog messages when the RDP box creates an outgoing link or other subnet that goes through the ASA and ASA sends syslog messages?
If you want to see activity in the RDP session, you need check the outbound RDP host connection, and for the SAA trigger and send syslog, traffic from the host RDP must pass through the ASA.
Connect to it via RDP 192.168.1.5 and AnyConnect.
If you want to check the activities, you will need to check if 192.168.1.5 launches all connections.
In regards to the max session disconnects, can you please share the syslog message which specifies that.
Hope that helps.
Tags: Cisco Security
I would like to know how can I filter out VPN traffic with a list of access, by using the source address and port of destination as filters.
I tried with "no sysopt permit vpn connection" but it is to filter the traffic through the VPN tunnel and I want to filter the host which can establish the VPN tunnel.
I did it in a router with this access list:
Note access-list 101 VPN
access-list 101 permit ahp host x.x.x.x everything
access-list 101 permit esp host x.x.x.x any newspaper
access-list 101 permit host x.x.x.x esp all
access-list 101 permit udp host x.x.x.x any eq isakmp
access-list 101 permit udp host x.x.x.x any eq non500-isakmp
But I tried the same thing in the ASA and does not work, I think it's because the ASA does not apply the access list for VPN traffic.
You can disable it with "no crypto isakmp are outside", but then even if you apply an acl to the outside which allows all IP, ESP, AH it still does not allow an IPSEC connection.
So for the moment I see no way to do this without using an acl on your router upstream.
I'll do a reading just in case I missed something.
Please help me to set the ACL and capture for remote access VPN traffic.
To see the amount of traffic flows from this IP Source address.
Source: Remote VPN IP (syringe) 10.10.10.10 access
That's what I've done does not
extended VPN permit tcp host 10.10.10.10 access list all
interface captures CAP_VPN VPN access to OUTSIDE gross-list data type
If you have configured capture with this access list, you filter all TCP traffic, so you will not be able to see the UDP or ICMP traffic too, I would recommend using the ACL, although only with intellectual property:
list of allowed extended VPN ip host 10.10.10.10 access everything
Capture interface outside access, VPN CAP_VPN-list
See the capture of CAP_VPN
You will be able to see the packet capture on the SAA, you can export the capture of a sniffer of packages as follows:
Hello everyone, I need help in a vpn configuration, this is the problem that I need nat all vpn traffic because I net to put into place a vpn but I already have another vpn with the same network, so that overlap with the new one, then how I can nat overlaps all traffic to another network in order to avoid the network?.
Please I really need help
You say that the 192.168.1.100 is able to go through the tunnel and the internet now?
Try to add another...
IP nat inside source static 192.168.1.101 10.10.44.101 map route VPN
Hello everybody out there using ASA.
I had a few IPSEC VPN tunnels between the company's central site and remote sites.
Two dsl lines were connected to the ASA, one for VPN traffic and the other for the internet.
The default gateway has been configured online internet, some static while insured roads as traffic to the sites of the company was sent through the other line.
A few days ago we changed the configuration of ASA to use only a single dsl connection, then the line serving the internet has been cut, while the other will become the gateway default and static routes have been removed.
The VPN connections instant stopped working and trying to send packets to the remote lan, it seems that ASA will not recognize that the traffic is encrypted. Obviousely we checked cryptomap, acl, ecc, but we find no problem... do you have any suggestions?
Thanks in advance,
XNetwork object network
10.10.0.0 subnet 255.255.255.0
network of the YNetwork object
184.108.40.206 subnet 255.255.255.0
card crypto RB1ITSHDSL001_map2 1 corresponds to the address RB1ITSHDSL001_1_cryptomap
card crypto RB1ITSHDSL001_map2 1 set peer a.b.c.186
RB1ITSHDSL001_map2 1 transform-set ESP-3DES-SHA crypto card game
RB1ITSHDSL001_1_cryptomap list extended access permitted ip XNetwork object YNetwork
Your exit the ASA must be encrypting the traffic between XNetwork and YNetwork.
If the ASA does not encrypt this traffic, it could be because there is a problem with the NAT configuration.
When the ASA receives a packet, it must first check if there are ACLs that allows traffic, passes through the inspection engine and check that the associated NAT. For example, if the package is coordinated, then the private IP encryption will never take place.
Could ensure you that packets from the XNetwork are really reach the ASA, the NAT rule is correct and you may be looking for "debugging cry isa 127" and "scream ips 127" debug to check for errors of incompatibility.
In addition, what is the condition of the tunnel trying to communicate: "sh cry isa his"
I would like to ask for assistance with a specific configuration to allow VPN traffic through a router from 1721.
The network configuration is the following:
Internet - Cisco 1721 - Cisco PIX 506th - LAN
Remote clients connect from the internet by using the Cisco VPN client. The 1721 should just pass the packets through to the PIX, which is 192.168.0.2. Inside of the interface of the router is 192.168.0.1.
The pix was originally configured with a public ip address and has been tested to work well to authenticate VPN connections and passing traffic in the local network. Then, the external ip address was changed to 192.168.0.2 and the router behind.
The 1721 is configured with an ADSL connection, with fall-over automatic for an asynchronous connection. This configuration does not work well, and in the local network, users have normal internet access. I added lists of access for udp, esp and the traffic of the ahp.
Cisco VPN clients receive an error indicating that the remote control is not responding.
I have attached the router for reference, and any help would be greatly apreciated.
For VPN clients reach the PIX to complete their VPN the PIX needs to an address that is accessible from the outside where the customers are. When the PIX was a public address was obviously easy for guests to reach the PIX. When you give the PIX one address private, then he must make a translation. And this becomes a problem if the translation is dynamic.
You have provided a static translation that is what is needed. But you have restricted the TCP 3389. I don't know why you restricted it in this way. What is supposed to happen for ISAKMP and ESP, AHP traffic? How is it to be translated?
If there is not a static translation for ISAKMP traffic, ESP and AHP so clients don't know how to reach the server. Which brings me to the question of what the address is configured in the client to the server?
Could someone help me find the problem?
I am ASA configuration as firewall + vpn server, essentially outside of the device's access T1 (there are two VLANS in inside via an iptables, outside of iptables is on the same vlan as insdie of ASA (192.168.5.1 and 192.168.5.2).) VPN users are authenticated via authentication 2 factors (SDI, ip is 192.168.5.5) and get the ACL by local database. pool of VPN is 192.168.6.1 - 192.168.6.15. pool of VPN is coordinated to the external IP address
trying to access a remote host A from the host a is open for the IP and one specific Protocol. all vpn traffic are in the tunnel. the VPN user can connected and ACL vpnuser1_ONLY not working does not as expected.
Here is the part of configuration:
ASA Version 8.2 (2)
Route outside 0.0.0.0 0.0.0.0 xx.10.194.193 1
Route inside companynet1 255.255.255.0 192.168.5.2 1
Route inside companynet2 255.255.255.0 192.168.5.2 1
Route inside companynet3 255.255.255.0 192.168.5.2 1
Route inside companynet4 255.255.255.0 192.168.5.2 1
Route inside companynetn 255.255.255.0 192.168.5.2 1
NAT (inside) 4 vpnpool 255.255.255.0 outside <--------- is="" this="">--------->
Global (outside) 4 xx.10.194.238 netmask 255.255.255.255
vpnuser1_ONLY list extended access permitted tcp vpnpool 255.255.255.0 192.168.1.28 host 255.255.255.255 eq ssh connect
vpnuser1_ONLY list extended access permitted tcp vpnpool 255.255.255.0 220.127.116.11 host 255.255.255.255 eq ssh connect
attributes of Group Policy DfltGrpPolicy
VPN - connections 8
Protocol-tunnel-VPN l2tp ipsec
SVC Dungeon - install any
time to generate a new key of SVC 8
SVC generate a new method ssl key
SVC request no svc default
internal GroupPolicy1 group strategy
attributes of Group Policy GroupPolicy1
VPN - connections 1
SVC Dungeon - install any
time to generate a new key of SVC 15
SVC generate a new method ssl key
client of dpd-interval SVC 30
dpd-interval SVC 30 bridge
value of deny message connection succeeded, but because some criteria have not been met, or because of a specific group policy, you are not allowed to use the VPN features. For more information, contact your COMPUTER administrator.
disable the SVC routing-filtering-ignore
username vpnuser1 encrypted password xxxxxxx
username vpnuser1 attributes
VPN-filter value vpnuser1_ONLY
value of group-lock COMAVPN
type of remote access service
tunnel-group DefaultRAGroup webvpn-attributes
Disable group companyvpn aliases
type tunnel-group COMAVPN remote access
attributes global-tunnel-group COMAVPN
address (inside) vpnpool pool
address vpnpool pool
SDI Group-authentication server
authentication-server-group (inside) SDI
Group Policy - by default-GroupPolicy1
tunnel-group COMAVPN webvpn-attributes
activation of the Group companyremote alias
I did anything wrong / missing?
First of all, you can set "no nat-control" because once you have relieved of NAT, 'no nat-control' becomes disable anyway. 'No nat-control' is useful if you have no statement of NAT at all on the interface.
Second, if you can't access the outside inside which is because you must configure the NAT exemption. Not sure if you have configured it.
Here's the command:
access-list allowed sheep ip 192.168.1.0 255.255.255.0 192.168.6.0 255.255.255.0
NAT (inside) 0 access-list sheep
You can then add all other subnets that are internal to the ACL sheep if you need VPN access.
Finally, for the error message deny on access-group "OUTSIDE", you would need check if you have configured "sysopt connection VPN-enabled'. If it is disabled, it will also check the "OUTSIDE" interface for VPN traffic.
I have been asked by a client to implement this topology:
ISP 1 is used as primary internet connection.
2 ISP will be used to connect remote users by IPsec VPN.
Currently, I'm not looking for the Active/Backup feature, I need to know if I can use both ISP connections (as I've written before) an ISP for the Internet company and the other for the user remote access VPN.
I read some post where, said, it's possible, but I want to be sure.
ASA must add the static route in the routing table automatically when the VPN client is connected. So, in general, you don't need to do anything. But if not, you can just manually configure who will forward a VPN client IP packet to ISP2.
With respect to NAT, in general, VPN traffic must ignore the NAT. You can use "nat (inside_interface_name) 0-list of access ' with an ACL that define the vpn traffic to do so.
I created a computer virtual Windows 8.1 on October 1, 2013 with the current, at that time version of VMWare Fusion (not Pro, who has the tab network preferences and the check box associated to whether to display it's fast) on my Mac.
Since then, I upgraded the version of OS X to Yosemite and the version of VMWare Fusion to 7.1.1.
At one time, months or years, I started having the prompt below:
A virtual machine tries to monitor all network traffic, which requires administrator access. Type your password for this purpose.
I don't want to allow this, I never asked for this virtual machine to use the "Promiscuous" mode, I don't want to do, and I can't find anyway to turn this off!
I always leave the command prompt and everything works fine. Discussions only I can find this in the forums are all related to people using ESX to vSphere, neither of which I have no knowledge where all used.
I had an another VM Windows 8.1 on another Mac during the same time, which has crossed all the same updates, and it never shows this prompt.
Please help make this stupid, quickly go and stop this virtual machine to try to use the "Promiscuous" mode!
Thank you - Harold
You have the Hyper-V role installed in the virtual machine?
I bought the Nighthawk R7000 router for my parents and they love it. However, I am disappointed by its rather simplistic traffic monitoring tools. The only info. I can read the stock browser GUI is a few basic IP traffic counting such as daily, weekly and monthly totals through the router.
For the last 6 months, I kept a monthly Diary of their Internet usage (they have service of Comcast 50 Mbps) and noticed an ever-growing increase in the use of about 60 GB of total traffic in June 2014 to now approximately 200 GB in November 2014. I asked them if they use more band bandwidth-heavy apps like YouTube videos, but they both say their general use is about the same as the return in the summer. Something strange is happening. They have some devices that I suspect may use a lot of this traffic - such as MagicJacks (2) for their VoIP home phone, but also a receiver of satellite w/Sling Apple use TV and DISH hopper.
Y at - it to DD - WRT firmware I can use on the R7000 for IP traffic detailed stats for each device connected to the router (both wired and wireless)? If so, what is it? I've heard of Kong builds are the most stable, but they have this detailed logging of IP traffic feature I'm looking for?
Here's a screenshot of the sample of a router ASUS using tomato firmware to show the kind of detailed report of IP traffic by device I'm looking for:
is easy to create the network to any host Wan monitor policy.
But if I want to monitor VPN host, how can I do...?
Monitor VPN host? Control if the VPN work? I use the Zabbix software to monitor my hosts.
I am facing a problem where
1. my users are able to access their mail from the web page, but ms-outlook is not able to synchronize e-mail.
2. our internal user to an external site via VPN, the user is able to establish the VPN connection, but the web page user tries to gain access to via VPN is not available. I can see traffic from the user to WSA in the firewall, but the traffic of WSA is not forward traffic after that.
Please suggest. As it is new, I needmore helps everyone.
Run the command grep in WSA CLI to get the corresponding access logs to see the behavior of the ASO at demand management.
Grep, access connects for a starter, SSH to the ASO and run the following command from the CLI:
2. Enter the number of the journal you want to grep: 1 (for accesslogs)
3. Enter the regular expression to grep:
4. do you want the search to be case insensitive? : Y
5. do you want to tail the logs? : Y
6. you want to paginate output? : N
Please keep in mind WSA is passively receiving the traffic and please ensure those kind of traffic will be sent to ASO before confirm us that it of a WSA question or not.
I want to follow any type of HTTP traffic on the BlackBerry device programmatically. With the help of HttpFilterRegistry we can monitor specific area, but my requirement is to monitor any kind of traffic regardless of field.
Any idea or suggestion wqould be great.
Short answer is that you can not monitor other application data traffic. I'm sorry.
Site2Ste VPN are configured at the branch offices. Traffic Internet goes through the VPN and the main office. Can the module CSC analysis this traffic?
If the traffic is decrypted before/on the ASA, then Yes.
We set up a site to ipsec with the seller.
For security reasons we do not want to allow all traffic through the tunnel.
ASA has 2 interfaces both inside and outside.
We refuse any one on the external interface ip.
I have config vpn run ACL to allow traffic on port ssh, icmp through the tunnel.
Then I applied it under the group policy.
name of VPN-filter value.
Need to confirm that I must also allow ipec protocols as esp etc under VPN filter ACL?
The vpn-filter is applied to the traffic flowing through the tunnel. You don't need to allow all traffic that 'built' like IKE and IPsec VPN.
On the SAA, you must also add this traffic to your external ACL is it necessary on IOS routers.
For the vpn-filter, be aware that the syntax is not
permit/deny PROTOCOL SOURCE DESTINATIONIt's
permit/deny PROTOCOL REMOTE LOCALThis is relevant when you want to filter traffic from your network to the network of peers.
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