Internet Protocol Security




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Internet Protocol Security (IPsec) is a protocol suite for secure Internet Protocol (IP) communications by authenticating and encrypting each IP packet of a communication session. IPsec includes protocols for establishing mutual authentication between agents at the beginning of the session and negotiation of cryptographic keys to be used during the session. IPsec can be used in protecting data flows between a pair of hosts (host-to-host), between a pair of security gateways (network-to-network), or between a security gateway and a host (network-to-host). IPsec is an end-to-end security scheme operating in the Internet Layer of the Internet Protocol Suite.

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It happens I need to keep my laptop (Windows 10 Home) powered on during night to save time for a lot of opened websites and documents I don't want to open anew each morning. But often when I resume work in the morning, the laptop is very slow when switching between the website tabs in the browser, and probably I get virus or other problems during night.

Is there any way I can protect it during nighttime, for example by turning off all ports? Otherwise, I only put it in sleep mode as it is now, but still it seems to get infected during nighttime.
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I feel like this is a simple fix but I'm kind of tearing my hair out here.

Client has 2 sites A & B

Site A: remote office, no AD server on site but existing ASA 5505 with anyconnect  licenses
Site B: cloud hosted servers including AD with ASA 5585 with anyconnect licenses.

The users can connect to either, depending on what resources they need and the availability of licenses, and they both authenticate with LDAP.

Site B network:
ldap server

LDAP auth works fine here. No worries.

Site A network:
ldap server

LDAP is not working. Traffic works between these 2 networks just fine, everything is up and running, all devices can see the ldap server (windows, btw) BUT the ASA cannot connect to the server when testing.

[-2147483634] New request Session, context 0x00007fff2a7fdfe8, reqType = Authentication
[-2147483634] Fiber started
[-2147483634] Creating LDAP context with uri=ldap://
[-2147483634] Connect to LDAP server: ldap://, status = Failed
[-2147483634] Unable to read rootDSE. Can't contact LDAP server.
[-2147483634] Fiber exit Tx=0 bytes Rx=0 bytes, status=-2
[-2147483634] Session End

I just can't seem to figure out why? ASA ping tests and packet trackers work fine from to and visa versa unless I use the source ip as the inside interface ip of the ASA itself. This seems like normal behavior?

I'm more of a …
Is it possible if any one knows my social security number and date of birth can pull my credit history?
As this is a proprietary app developed some time ago, it does not come with
an audit logging & it became an audit finding.

I'm proposing a 'video-recording' of users session to be implemented as
compensating controls.

Anyone can suggest any tool to do such video recording such that when
the thick client is executed, it will start video capturing the screen &
upon exiting the app, the recording stops & gets saved.

2 tools below was found while browsing the Net but our applications
developer retorted they're not the right products:

Apps guy: VSTS below seems to be only applicable to web applications? True or False?

Apps guy: JMeter works by pushing thick client traffic through JMeter proxy which detect traffic
and record it into JMeter HTTP Requests & this JMeter proxy is located out there in the Internet
& using this solution means pushing sensitive data out there into Internet.   True or false?
I need to do a site to site IPSec VPN with an outside vendor so they can access a server on my network. On my end I am using a Cisco RV320 Small Business VPN Router. RV320 Manual.

The vendor and I both use the same subnet Neither of us can change our subnet.

My office is pretty small so all network devices were on the default VLAN. No other VLANS were defined.

To try to work around the subnet problem:
  • I created a second VLAN -

  • I setup the VPN to connect to that VLAN
  • I wired the server to LAN3 on the Cisco.

  • I used Port Management > VLAN Membership and set Inter VLAN Routing to Disabled for both VLANS.
  • For VLAN1 ( I set LAN1 and LAN2 to untagged / LAN3 and LAN4 to excluded
  • For VLAN2 ( I set LAN1 and LAN2 to excluded / LAN3 and LAN4 to untagged
  • For VLAN2 ( I set Device Management to disabled

The outside vendor can connect, access the GUI for router (which they shouldn't be able to) but not access the server on port 80.

The way it is setup, it should connect the vendor to my network, and they should just be accessing the subnet. The server they need to access is (static address, the only …
Any simple and good reference to explain the difference between time-based one time password and traditional OTP?  

Besides,  what are the risks and concerns of using freeware token app, e.g. FreeOTP?
I open up Internet Explorer or Edge on a WIN10 computer but I am not able to go to any website.

However, I am able to ping the default gateway of my home router,  ping the public DNS IP and get the DHCP address.  

What could be the reason?
Hi experts
 I bought UNV ip cam without NVR
I used the EZstation management software instead of the NVR but I found that application useless and very difficult to use
I need help to find another ip cam server and client application i can use for these cameras model
I ran a PCI test on our server and found two small issues, perhaps someone here knows how to resolve.

1. Windows specific file path was detected in the response.
WAS Result:  E:\web\favicon.ico
WAS Result:  C:\Web
Proposed solution:  The content should be reviewed to determine whether it could be masked or removed.   (I don't know how to do this)

2. The Web server can be triggered to reveal the absolute path for the Web root directory and/or other software installed on the host.
WAS Result: Some HTML code  (BlueDot Azure Server port 80/tcp)
Proposed solution: Contact the vendor of the Web server for a possible patch for this issue.  (Server is up to date)

3. SQL Error message: The scan observed an SQL-based error message while performing injection tests. However, the message only appears to indicate that a SQL statement in the web application may be corrupted; it may not be exploitable.

SQL injection enables an attacker to modify the syntax of a SQL query in order to retrieve, corrupt or delete data. This is accomplished by manipulating query criteria in a manner that affects the query's logic. The typical causes of this vulnerability are lack of input validation and insecure construction of the SQL query.

Queries created by concatenating strings with SQL syntax and user-supplied data are prone to this vulnerability. If any part of the string concatenation can be modified, then the meaning of the query can be changed.

I recall a few years ago that I used a program similar to Skype which allowed me to have private conversations via this tool.

There was some sort of key that I generated on my PC and emailed to the other person, which that person added to this tool. We then have "private" conversations.

Does this sound familiar to anyone? That does tool, or another, offer this today?

Is your NGFW recommended by NSS Labs?
Is your NGFW recommended by NSS Labs?

Ours is! NSS Labs Next Generation Firewall Test gives the WatchGuard Firebox M4600 a "Recommended" rating! Curious where your NGFW landed on the  Security Value Map? See the map and download the full report today!

Hi there!
I have another strange issue, let me explain what is going on.

I have two machines (server1 and server2) with Windows Hyper-V server 2016 (the free one). Both connected in really simple Active Directory. Aditionally I have a management server with GUI server OS.
Both servers was connected to the same switch in my office, so I can establish replication of one VM located on server2 to the server1. Everything is going smoothly for couple of days.

Then I take the server2 and bring it to the remote site where already was Mikrotik router with IPSec VPN tunnel to my Office site. Just after that, replication stops working - so I let it running for some days to let settings settle down. After that days I removed the replication and try to make new one.

There Im getting error:

Hyper-V failed to enable replication.
Hyper-V failed to enable replication for virtual machine 'XXX': The connection with the server was terminated abnormally (0x00002EFE).

On the server1 - in my office - the secondary one, there is event:
ID: 29212
Source: Hyper-V-VMMS
Text:Hyper-V failed to authenticate the primary server using Kerberos authentication. Error: The I/O operation has been aborted because of either a thread exit or an application request. (0x800703E3)

On the server2 - the remote site, there is also only one event:
ID: 32000
Source: Hyper-V-VMMS
Text:Hyper-V failed to enable replication for virtual machine 'XXX': The connection with the server was terminated …
"The certificate presented by this website was issued for a different website's address."

The cert I installed on the load balancer was * But the address put into
the browser for this vip would be like Would having the
addition of the stage to the domain name cause the certificate error noted at the
What is the importance of this message.
What should I be concerned about? Or When should I be concerned about this?
We recently converted our site to be a secure site and it works--for the most part. But many visitors are getting messages about installing certifcates or being denied access. From a Mac Chrome user:

"403 - Forbidden: Access is denied. You do not have permission to view this directory or page using the credentials that you supplied."

From an Android Chrome user:

"No certificates found. Chrome has requested a certificate. Agreeing to this request will allow the application to use this certificate with servers from now on. The requested server has been recognized as Only agree to this request if you trust the application. You can install certificates from a ..."

I thought making a site secure (HTTPS) was supposed to just affect the communication between the browser and the server, and that the browser hid all this security stuff from the user and only indicated to the user that the site was secure. What are we doing/not doing that is putting these prompts and issues in the user's face?

The site is


A client has an IPSec VPN that uses UDP ports 500, 1701 and 4500

Is it possible to capture the packets that are sent in response, are they sent to the same port numbers by any chance ?

I have a remote situation where we have 65 small retail stores and 4 regional offices all connected via IPSec tunnel back to the corporate data center.  Everything is working great.  What I am looking to do is re-configure the Corporate ASA just to make the code easier to manage and even read.

However, the Cisco ASA IOS is not doing what I want to do in handling objects, and it may be that it just will not work.  What I want to do is use objects to create a single VPN "match address" in the crypto map definition and then just have it search through the IPsec "peers" listed in the crypto map set peer command to find the correct peer and establish the tunnel.

Here is a small code example of what is WORKING, and below that is what I want to which is not working.
object network GKY-CORP-LAN
  description This is the Corporate Data Center
object network GKY-BGRO-LAN
 description This is the Regional Office
object network GKY-TVILLERD
object network GKY-NORTHFIELD
object-group network GKY-STORES
 network-object object GKY-TVILLERD
 network-object object GKY-NORTHFIELD
object-group network IPSec-Sites
 network-object object GKY-BGRO-LAN
 group-object GKY-STORES

access-list VPN_GKY-BGRO-LAN extended permit ip object GKY-CORP-LAN object GKY-BGRO-LAN
access-list VPN_GKY-TVILLERD extended permit ip object GKY-CORP-LAN object-group …
I use Mac Safari but could switch to Chrome.

what is Incognito mode? What browsers support that?

Are there other search engines I can use?

Any downsides to browsing in the dark?


Looking for recommendations on web content/filtering/security solution, either hardware or in the cloud with minimal management required on it

Thanks in advance
We have a remote site, which is currently using pfSense as it's firewall.  There is one static IP, the ISP isn't able to add additional IP's with out changing the IP range, no surprise there.  This site is owned and operated by a vendor and they are not willing to move IP's since it will require a reconfiguration of their network.  The owner is already using IPSec to connect that office back to it's main office.

We have some computer equipment in the remote office and would like to upgrade our network equipment and ideally would like to use IPSec.  While I could move IPSec to another port, the issue is with GRE, as there isn't any real port used.

Are there ways to configure multiple GRE/IPSec tunnels over the same Static IP with different physical hardware?
If so, how?
If not, what are my options?

For our equipment I'm using a MikroTik CCR1016-12G

Thanks in Advance.
Free Tool: Subnet Calculator
Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

I am seeing a large increase in failed password authentication via radius. It's unlikely that a large number of users suddenly forgot their password. How can I troubleshoot which active directory server was in play during a failed radius authentication?
I have VPN between WRVS4400 and RV220W. I had to change WAN IP address at RV220. So after that i cant establish VPN. (chenge VPN IP in WRVS).And:

From WRVS computers i can go to admin RV220 with local IP, can ping to RV220, but cant ping to computer which are after RV220;

From RV220W - from computers cant go to admin WRVS with local IP, cant ping to router, cant ping to computers, when i use router administration diagnostic can ping to WRVS router, can ping to printer (connected to router), cant ping to computers.

At WRVS i change remote IP at VPN tunnel and at RV220W i change WAN is log from RV220W:

79 it is WRVS4400 IP, 83 it is RV

2017-04-11 07:09:51: [rv220w][IKE] INFO: Configuration found for
2017-04-11 07:09:51: [rv220w][IKE] INFO: Initiating new phase 2 negotiation:[500]<=>[0]
2017-04-11 07:09:52: [rv220w][IKE] ERROR: Unknown notify message from[500].No phase2 handle found.
2017-04-11 07:10:00: [rv220w][IKE] ERROR: Unknown notify message from[500].No phase2 handle found.
2017-04-11 07:10:02: [rv220w][IKE] ERROR: Unknown notify message from[500].No phase2 handle found.
2017-04-11 07:10:10: [rv220w][IKE] ERROR: Unknown notify message from[500].No phase2 handle found.
2017-04-11 07:10:12: [rv220w][IKE] ERROR: Unknown notify message from[500].No phase2 handle found.
2017-04-11 07:10:20: [rv220w][IKE] ERROR: …
I need a site(s) that can check a shortened URL to see where it takes me.
I have a vendor which operates a web service that we subscribe to. They have told us they will begin to refuse connections which are established using TLS 1.0 protocols for encryption. I agree with this and I was fairly certain we had taken all of the necessary steps to disallow TLS 1.0 nearly 2 years ago. This vendor is doing it a little differently in that they are going to keep TLS 1.0 enabled on their server and reject and lock out any connections which attempt to connect using it. This part, I do not agree with but who am I.

This vendor has done a packet capture on their side and I have also done one on the client side and both clearly indicate a TLS 1.0 handshake and establishment of an encrypted connection. This is the heart of the problem.

My question is simple, or so I thought... How do I go about disabling TLS 1.0 on a Windows 7 client such that it will no longer respond to TLS 1.0 offerings from a server which still has TLS 1.0 enabled. The client application I use is basically an embedded Internet Explorer client and as such can use any setting which effects Internet Explorer.

I am not perplexed for long on most issues but I must admit that this one has me totally stumped.

Thanks in advance for your insight...
Hi there!

After some difficulties (of course...), I was able to create ONE MyDlink account and put two cameras properly installed "inside" this account.

Then I have downloaded the "MyDlink Lite" app for the Android and at this moment I can see, remotely, through my cellular phone, the images from both cameras at real time. Great!

My problem: I would like to download the "MyDlink Lite" app for the Android in ANOTHER cellular phone, so that two people will be able to see the images of the same two cameras. Let´s say that I have two cellular phones, and I would like to see the images in both of them.

(I don´t have problem to share my login and password to the person on the other cellular phone, it´s my father, in fact.)

All that put, the question:

Should I create another account or another registration (as a "new user") in "MyDlink site" or in "MyDlink Lite" and "share" the cameras or can I simply install "MyDlink Lite" in my father´s cellular phone as if he is myself (same login and password) ?

I ask this question this because I am afraid I can get some "conflict" when using the same login and password from two different "places" and, what would be terrible, miss (mess up) the configurations and the perfect funcionallity that I have at this moment, with only one cellular phone "connected" to the cameras...

Thanks a lot!

For the past couple of months, an attacker has been sending my company emails trying to get us to install a RAT. Somehow, he knows the services we use (VoIP providers, etc) and sends emails as them. I've traced his originating IP using the email header data and he traces back to a server rental farm in Japan. I've reported him to them 3 times, but to no avail. Any ideas on how to stop this guy? We cant block the domains, as they are legitimate domains we receive emails from.

Internet Protocol Security




Articles & Videos



Internet Protocol Security (IPsec) is a protocol suite for secure Internet Protocol (IP) communications by authenticating and encrypting each IP packet of a communication session. IPsec includes protocols for establishing mutual authentication between agents at the beginning of the session and negotiation of cryptographic keys to be used during the session. IPsec can be used in protecting data flows between a pair of hosts (host-to-host), between a pair of security gateways (network-to-network), or between a security gateway and a host (network-to-host). IPsec is an end-to-end security scheme operating in the Internet Layer of the Internet Protocol Suite.