Questions tagged [tunneling]

tunneling refers to a mechanism in which one network protocol encapsulates a different payload protocol.

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Azure VPN through Wireguard VPN - 'Name Not Resolved'

I have setup a wireguard (WG) vpn server on a raspberry pi that connects to my home internet and I connect to this with my work laptop through a VPN router. On my work laptop, I get access to several ...
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55 views

Can I use a VPN to access services only available to a specific network? [closed]

I am a member of a library which has access to online databases that I use for work. The databases can only be accessed when you are on library's WIFI network. If I try to use the same databases from ...
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101 views

Could someone the real IP address when using tunnel protocols like ngrok, localtunnel or serveo?

Could someone get the real IP address that is hidden behind the URL generated by tools like ngrok, localtunnel or serveo?
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Sending traffic to cloud proxy with GRE vs. IPSec

Taking a look at several cloud proxy/CASB vendors, they all seem to have the same recommendation of primarily using a tunnel to deliver internal traffic to them -- either GRE, or IPSec. IPSec ...
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1answer
58 views

How can you attack or redirect the client from the server over an RDP or SSH conneciton? [closed]

I have a penetration testing scenario where I am on the network with two machines, Machine A and Machine B. I have complete control over Machine B and am trying to leverage that to get access to ...
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SQL Server connections with TLS vs. through an encrypted tunnel?

I'm developing an application that will connect to Microsoft SQL Server in a local network: I'm considering whether these connections need to use TLS Or whether to leave it to the customer's ...
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1answer
547 views

SSH reverse tunnels: can the intermediate server eavesdrop on an SSH session?

Suppose there are three computers: (1) my laptop, (2) a server that has a public static IP address, and (3) a Raspberry Pi behind a NAT. I connect from (1) to (3) via (2) as explained below. On the ...
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1answer
470 views

pivoting without metasploit to get reverse shell

I have an exam next week. I need help. This is my lab: attacker machine (kali) : 192.168.1.81 1st hacked machine (Windows 10) : 10.10.10.130 target (Windows 7) : 10.10.10.135 (...
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2answers
586 views

Is HTTPS over LAN effective?

From my understanding, while HTTPS does not stop a mitm, it makes it so the mitm cannot read the plaintext requests. But, the mitm could still tamper with the public/private keys anyways, so in came ...
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66 views

Security practices with ngrok?

I know many developers use a tunnelling software called ngrok, yet many don't know how it works or what it's doing. An example of its use is in testing webhooks on a development server I found this ...
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1answer
62 views

Tunnel between two applications, one of them is a 3rd party app

I have written an application, that calls a 3rd party application with process.Start(). Inside the Arguments I pass needed credentials. like so: proc.StartInfo.Arguments = $"-c: -h: -x: -m:{...
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1answer
335 views

Attack scenario when using split tunnel VPN

Background As many others I am working from home and we use a VPN to access services from the company intranet (SMB fileshares, git repo, project management etc). To improve things like video calls I ...
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2answers
370 views

Is accessing Cockpit through SSH tunnel secure?

I can't find a definite answer on accessing cockpit from outside machines securely. Just allowing it through the firewall like that doesn't seem safe. It only uses basic user and password ...
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1answer
2k views

WireGuard / CVE-2019-14899: How secure the protocol really is?

I've been using OpenVPN and SSH tunnels for a multitude of scenarios over the years and recently I've been earning a lot of buzz around the simplicity and security of WireGuard. Now I've found some ...
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1k views

Managing SSH private keys on a public host

I have a web server which is running on a private subnet in AWS VPC, let us call it worker. I can access the worker VM through a Bastion VM which is in the same VPC but in a public subnet. Then, I ...
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281 views

StrongSwan, IPsec remote certs and cert_policy

I'm looking for a way to limit the certs that my IPsec can accept. I'm using StrongSwan (swanctl version 5.7), I want to accept only certs coming from a remote with a name of yoji.*.example.com I ...
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4answers
139 views

Disable Encrypted Protocols Through Firewall

In my company, we have two internal domains with a firewall between them. When requesting firewall rules for an application with components on domain A and domain B, I was told that encrypted ...
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213 views

Custom IPv6 network and security risks

I draw a custom network (I would use that for developing and testing, my ISP does not support IPv6), there IPv4 and IPv6 are present. 'A' device has firewall: incoming blocked, only accept access (SSH)...
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769 views

Automatically change connection of VPN when accessing certain websites

So I am quite new to VPNs, just downloaded and installed NORDVPN despite the latest admission of security breach for a trial period. I am also running BitDefender TS on my computer. I wanted to know ...
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2answers
820 views

Is it possible to tunnel my whole linux machine through http proxy? [closed]

For some reason i access my internet through a HTTP proxy. Is there a way to tunnel my whole Linux machine (currently am using ubuntu 18.04) through http proxy. If i change proxy setting in the ...
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145 views

Split tunneling to speed up Windows update

We have almost 10 years worth of Win7 updates that need to be done and the amount of bandwith can't be handled by our VPN. Are the security risks of enabling split-tunnel a lot smaller when its just ...
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1answer
281 views

Why is GRE tunneling is needed when having a BGP based solution against DDoS?

I understand that GRE tunneling is very handy when sending the data back to the client after scrubbing because it's designed to ensure that the data is sent reliably by initiating a private point-to-...
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1answer
3k views

how to force openvpn client to use TLS instead of SSL connection [duplicate]

i'm trying to use openvpn client to connect TLS VPN server here is my .ovpn file client tls-client dev tun proto tcp remote example.com 443 resolv-retry infinite auth-user-pass persist-key ...
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1answer
94 views

What's the difference between SSH tunneling and login into the same SSH server and executing commands?

Consider these 2 scenarios. (1) Let's say I login into an SSH server named A normally using ssh [username] @ [IP address of A]. And now I connected to another server named B which is accepting ...
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1answer
952 views

What's the security concern of browsers using the HTTP CONNECT method?

The XMLHttpRequest spec says that attempted usage of the CONNECT method should throw a security error. Is there a security issue with client-side JavaScript sending CONNECT requests to servers? It ...
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1answer
387 views

Deanonimizing VPN/tor traffic [duplicate]

What a VPN does is take the encrypted traffic from the client, decrypt it and forward it to the server, while tor bounces the traffic in multiple nodes decrypting a layer at each node. I have some ...
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370 views

Problems with getting reverse shell

I got a badUsb, my current solution is: it downloads netcat.exe and establishes a netcat connection between test-box and me with the help of localxpose tunneling (when I'm not in the same network). ...
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1answer
433 views

VPN vs SSH tunnelling for hotel wifi

I know it's recommended to use a VPN with a hotel WiFi but if I'm in a hurry and don't have time to setup my own VPN server would an SSH tunnel (invoked with ssh -D) work just as well to secure my web ...
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2answers
5k views

Is telnet secure through SSH tunneling

Firstly sorry, maybe dumb question, but I have one service running on my server which can be operated only by telnet (port 23), but I know that telnet is insecure, so I blocked port 23 in iptables ...
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1answer
221 views

Is the same key used for Authorization and Encryption? (SSH Tunnel)

I am a bit confused on how SSH encryption works. From reading this question, I see you can use a private key to authenticate with the -i flag. I also know think that SSH encrypts data using ...
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1answer
2k views

Tunnel ssh over http with custom headers

I'm trying to set up corkscrew to make an SSH tunnel over HTTP, but I need to add custom headers after the "CONNECT" statement and before the ssh tunnel. Does corkscrew support it? If yes, how can I ...
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1answer
809 views

How to obfuscate SSH tunnel Mac?

I am looking to test a DPI (deep packet inspector). I currently have it set up to block SSH connections (which it does successfully). I have learned that DPI can be bypassed by obfuscating/encrypting ...
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3k views

Are there any feasible ways to block the stunnel utility at the network level?

The stunnel utility written by Michał Trojnara allows, if I understand correctly, to "wrap" non-SSL protocols (such as ssh) in an SSL connection. For example, imagine that all network ports on a ...
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2k views

Tunneling SSH over Shadowsocks

This post on unix.se explains how to tunnel SSH over shadowsocks. This post on sec.se discusses some of the vulnerabilities of shadowsocks (namely its vulnerability to brute force). After reading ...
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2answers
596 views

tunnelling HTTP request through DMZ from a secured area

In my topology I have a secured area where all the servers are. There is also a DMZ with a few reverse proxy servers. I now need to make one of the servers in the secure area open to make HTTP calls ...
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1answer
62 views

Negative consequences of forced encryption of unencrypted secvices

Are there any negative consequences to encrypting an unencrypted service/protocol like FTP, VNC, telnet, and so on by using forced encryption like ssh tunneling or OpenVPN tunnels?
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796 views

In DNS Tunneling, What's the DNS Response packet size?

In DNS Tunneling server use RR (CNAME, TXT, NULL) to send back data to the client. My question is what's the size of response packet and how much data can be sent using DNS response in DNS Tunnel ?
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1k views

Trying to tunnel a reverse shell out of an internal network

I am practicing performing a pentest and getting stuck trying to get an interactive reverse shell from an internal machine to my attacker machine. This is what I have done so far: Me(attacker): 67....
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1answer
1k views

Pivoting with Metasploit

I am trying to exploit a Windows VM on a different subnet behind a dual home Linux VM where I already have a shell. To keep it simple, I have a meterpreter reverse_tcp shell on the Linux VM (192.168....
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2answers
1k views

VPN tunneling, routing and sniffing

I did not understand some things regarding the VPN. How is the VPN tunnel established? My computer and the end VPN server need to exchange some info to establish a tunnel? (some kind of handshake or ...
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1answer
1k views

DNS Tunneling - Mitigation

I believe the root cause for DNS tunneling is because the internal hosts are allowed to do recursive queries of external domains. For DNS tunneling to work, an internal host should be able to send ...
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1answer
2k views

Is it sensible to tunnel TLS traffic over another TLS?

I'd like to secure my application's traffic using TLS with pre-distributed self-signed certificates (as a drop-in replacement of plain TCP). In some cases, two clients won't be able to talk to each ...
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1answer
251 views

VPN and SSH overseas

I stopped penetration testing and studying network security, for the most part, when the "NSA Playset" was released years ago. Thus, I have an IT question to impose upon you. I will be traveling ...
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2answers
942 views

Can a Government block a specific app traffic, even with a VPN running?

A few minutes ago, there was a terror attack on a nightclub in Istanbul/Turkey(Thoughts and prayers to the victims and families), usually, the Government limits most of the communications apps traffic ...
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1answer
371 views

How to ensure if an SSH tunnling failed (if I haven't really tunneled)

I tunneled data transition as 22-22 and 2222-80, between my PC and VPS: ssh user@1.1.1.1 -L 22:localhost:22 -L 2222:localhost:80 -i ~/.ssh/key To make sure both tunnels were created, I executed lsof ...
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1answer
79 views

How to make sure the data is indeed tunneled?

I am not of the IS field so sorry if anything I write here seems pathetic. Background for this question: I login to my server with the following command. The second -L porition is to encrypt data ...
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4answers
406 views

How could I tunnel all actions I do in my VPS from my browser (like PHPmyadmin actions)?

I am not of the field of information security so sorry if something I wrote below seems pathetic to you. I am to defend my server's DB and for that I filtered port 3306 with CSF-LFD and now control ...
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2answers
435 views

Why can hackers get in network using tunneling? [closed]

I can't hack but I like to read about it. From my readings (securityfocus, exploit-db, owasp, etc...) it appears that hackers can actually get in a network using tunneling ; I'm not from a network ...
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1answer
3k views

Does a Server connecting to port 3544 pose an increased risk

I had look at the firewall logs and i can see my production server connects to microsoft (13.92.90.48) on UDP port 3544. A quick reading suggests this is to do with Teredo tunneling (IPV6 translation ...
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1answer
834 views

Does AH in tunneling mode provide encryption?

I've been reading on IP sec for a few days, and i have some confusion on the differences between AH and ESP in tunnel/transport mode. I understand that AH only provides authentication and integrity ...