vpn – Specify outgoing network interface in ipsec.conf for one IPSec tunnel?

I’d like one of my tunnels to go out a particular interface. Is there a way to specify it?


conn remotehost.example.org

Both the left and right hosts have dynamic IP addresses, so it is not trivial to do this with routing.

vpn – What are reasonable level of security for a interal-use organization application hosted on the cloud?

I’m working on an small web application (Flask). The application is only for distributed internal usage, e.g. only users with credentials created by the organization will have access to the services beyond the Login page and the organization creates the users. It needs to be distributed because some of the user base is traveling. The data hosted on the application is day to day operation stuff, inventories, invoices, clients contacts & similar. It is organization-sensitive in the sense that you wouldn’t want competitors or third parties sniffing it out. No financial transaction, or bank accounts data are stored there.

From a security perspective, my thinking is that proper user management system with a solid implementation is a sufficient level of security for this, or more specifically:

  • CSRF protection for anything getting user inputs (which Flask provides if using Flask Forms, or pluggins exists otherwise)
  • XSS protection (Jinja templating goes a long way to protect from that). At any rate, all user inputs are sanitized and no html (or css) is served based on raw user inputs.
  • And basically everything outlined in Flask’s Security Considerations is followed & properly implemented, as relevant in the use case.
  • An ORM is used, so that anything that goes in the DB is properly parametrized to prevent SQL injections.
  • At any rate, only trusted users can connect to this beyond the login page (therefore the above protection would get into play only if, say, a malicious user managed to gain control of a user account, and use it to try to inject code)
  • The application is containerized on Docker. No container runs with root, meaning that any attacker who would infiltrate a container would not be able to break out of that container, and all Docker recommendations are followed. In addition, the only container that is actually open to the web (e.g. the only port opened on the host) is the nginx one.
  • App runs on https
  • Nginx for reverse proxy, to provide a layer of abstraction between the server itself and any user, as well to add protection against DDOS (though unlikely in our use case), serve static files etc.
  • As users are also a weakling in any security system, it will be recommended to connect to the application only thru trusted wifi or data from their own simcard/ISP. Humans being humans, this may or not be followed in all cases.
  • There will be different user profiles, each having access only to the parts of the data that are actually relevant for their job.

Seems to me this results in a robust enough application from a safety standpoint. Do I have obvious blind spots here? In which case would a security specialist start to consider “no, that’s not enough, we really need to add a VPN connection on top of this”?

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VPN is working or not? Help with signing up to a website


I am trying to sign up to work for Niteflirt from a non-supported country. A friend signed up for me and put his american debit card for age verification, my email address and his billing address from USA (he’s got an LLC there). He lives in Asia and he connected to Niteflirt through purevpn.
I got a confirmation email saying Welcome to Niteflirt and a link to access the site.
I connected to Hotsposhield and tried to sign in and surprise…. The account is not responding in any way, does not recognize the email; nor the password my friend set for me.
After that, my friend tried to connect himself to the new account he created and the same thing happened. Like ban but with no message or something to say why is this happening.
He used purevpn to connect and to sign up.
Could you please help with an idea what kind of system Niteflirt has to block us even through VPN?
Also, what is interesting is that there are accounts made from other countries and used by people from non supported countries without any vpn.
A suggestion of what may work, please?



Configure the default route that the Azure VPN Gateway provides to P2S clients (to allow for multiple connections)

I have two completely independent Azure environments that I control. One virtual network uses the address space, the other uses the address space. I need my users to be able to connect to both vnets simultaneously via point-to-site (P2S) VPN connections.

I have much of this working. I’m using plain-old, built-in rasphone for this- no special extra VPN client software, I set up the connection directly in rasphone with no downloads or installs. Either one of the connections work perfectly alone, the problem comes when I try to use them together.

Apparently, when I connect to either of them, a route gets added for So when I connect to both of them, two conflicting routes get added. The one with precedence wins, so in practice one connection of the two will work, while the other fails. In case that isn’t clear, here’s the output from route print:

Network Destination        Netmask          Gateway       Interface  Metric     36     36

In the above case a tracert for shows that it’s trying to resolve the IP address via the gateway (the one with precedence), which is the wrong one, so it finds nothing. I need to route traffic through, and through

Now, I could try to modify the route explicitly on every client PC, but that adds a whole extra step to the process of setting up each and every PC. The Azure VPN Gateway is obviously capable of telling the client what routes to add, since the route gets added automatically every time I connect, so I’m hoping there’s a way to configure that default route and limit it to only the IP range I want. And if there isn’t a way to explicitly alter it, is there at least some way I can rearrange my address spaces so that the gateway realizes I don’t want to route all of

What Is Use Of Vpn ?


vpn – OpenVPN: UDP broadcast in tap environment

Background: I am currently trying to create a VPN for playing old computer games via LAN (Empire Earth / Warcraft III) and to bypass geo-blocks.

I am using the docker image by kylemanna and my openvpn.conf is the following:

verb 3
key /etc/openvpn/pki/private/<censored>.key
ca /etc/openvpn/pki/ca.crt
cert /etc/openvpn/pki/issued/<censored>.crt
dh /etc/openvpn/pki/dh.pem
tls-auth /etc/openvpn/pki/ta.key
key-direction 0
keepalive 10 60

proto udp
# Rely on Docker to do port mapping, internally always 1194
port 1194
dev tap0
status /tmp/openvpn-status.log

user nobody
group nogroup
comp-lzo no

### Route Configurations Below

### Push Configurations Below
push "block-outside-dns"
push "dhcp-option DNS"
push "dhcp-option DNS"
push "comp-lzo no"

### Extra Configurations Below
topology subnet

For accessing the internet using the VPN, everything works fine. Also the direct connections between the clients work. But neither Warcraft III nor Empire Earth is displaying any game hosted on the LAN. For Emprie Earth, I can bypass this with a direct connection to a IP address in Warcraft III direct connections via Lancraft work like a charme.

I already found the related topics here on serverfault, with this one stating that you need bridging to get the UDP broadcasts to work.

From sniffing packages I know that Empire Earth sends a UDP package to (broadcast) – these broadcasts also show up on another PC using Wireshark (both are using a different internet connection) – but I really don’t get why the games aren’t heeding these broadcasts. I might missing something obvious. Pings via the Windows cmd also work.

Here’s an example from the wireshark session:

Wireshark sesssion

How to streamline connections to my Google Cloud VPN to approved Ip addresses

Please I need assistance on streamlining connections to my cloud VPN as I am a developer with little networking knowledge.
After back and forth with I was able to setup VPN connection from a vendor location to my company’s server on Google Cloud Compute. However, I am extremely worried about incurred cost. I saw 154548 and 10570 hits on the firewall from unknown sources.
Please what configurations do I need to setup to only allow traffic from approved Ip addresses
Thank you for the Support in advance and I would appreciate a timely feedback.

What are the threat models that using a VPN for mobile data can mitigate?

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Does GSA support rotating VPN ?

I used set my VPN change IP every 10-15 minutes and
GSA set no use proxy.
BUT, got complained said I am hacking, am I wrongly set GSA ?
Or any tips about this matter ?