Questions tagged [tunneling]
tunneling refers to a mechanism in which one network protocol encapsulates a different payload protocol.
113
questions
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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 ...
-1
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1answer
46 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 ...
1
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2answers
87 views
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 ...
5
votes
1answer
528 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 ...
0
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1answer
233 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
266 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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0answers
51 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 ...
2
votes
1answer
48 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:{...
2
votes
1answer
253 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 ...
0
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0answers
113 views
How do I connect using ssh tunnel to heroku's cleardb mysql database from some gui tools like mysql workbench or beekeeper studio, when run on ubuntu
Im currently trying to connect to the Heroku's mysql cleardb database from beekeeper studio. My connection works when done normally. But when I use the ssh tunnel Im facing some issue.
Their ...
0
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2answers
258 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 ...
2
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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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2answers
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 ...
0
votes
1answer
243 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
114 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 ...
1
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0answers
193 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)...
3
votes
2answers
642 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 ...
1
vote
2answers
746 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 ...
2
votes
0answers
134 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 ...
1
vote
1answer
248 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-...
2
votes
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
...
2
votes
1answer
83 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 ...
0
votes
1answer
874 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 ...
0
votes
1answer
364 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 ...
0
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1answer
341 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
411 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 ...
24
votes
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 ...
2
votes
1answer
195 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 ...
3
votes
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 ...
2
votes
1answer
748 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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3answers
2k 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 ...
2
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0answers
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 ...
2
votes
2answers
562 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 ...
0
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1answer
54 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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votes
1answer
728 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 ?
4
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1answer
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....
6
votes
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 ...
6
votes
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 ...
4
votes
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 ...
1
vote
1answer
240 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 ...
4
votes
2answers
918 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 ...
0
votes
1answer
360 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 ...
1
vote
1answer
70 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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vote
4answers
395 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 ...
0
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2answers
406 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 ...
3
votes
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 ...
2
votes
1answer
819 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 ...
3
votes
2answers
125 views
Security concerns with external MySQL access using tunnelling
I have gotten my personal vServer with a standard installation of Ubuntu Server 16.04 and I wanted to install and configure a MySQL server on it. I was considering to disable direct external access, ...
2
votes
2answers
525 views
Authentication helpers for tunneling through an HTTP proxy?
corkscrew is quite good for tunning SSH through an HTTP proxy. However, it only supports basic authentication. Have other people developed similar software supporting other types of authentications? ...
