Tag: network

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network – Can an infected device within the LAN still be a threat if turned off?

Scenario

An attacker successfully infiltrates the LAN and infects a device that acts as a future bridge. Once inside, the infected device can communicate with a malicious source outside of the local area network. We assume that only one device is infected and that the malware is located anywhere in the computer but it’s unable to migrate to other devices in the same LAN. I’d imagine that the tools available today are much more sophisticated and can probably spread across devices by itself, in this case you can provide an answer with this alternative scenario described.

Security Measures

The scenario should be realistically simulated which means that there are some security measures put in place, like there are in most homes today. In this case, the scenario described that the attacker was already inside and had successfully infected a device, which means that the security measures were penetrated.

Question

The infected device is turned off and the power input is active. Can the infected device still function as an access-point from the outside of the LAN?

If so, what measures are needed to completely cut off the malicious communication?

what provides OSI layer 2 access in a wireless network

If anyone can please explain in detail what provides layer 2 access within a wireless network?

network – Find hidding IP from traceroute

I’m trying to find a hidden IP adress with the traceroute, but I can’t.

I’ve tried with tcptraceroute and with hping3

Can all the port be blocked on the device I try to find the IP?

Here’s the output of a traceroute:

**the destionation (facebook.com) is an exemple

traceroute to facebook.com (157.240.241.35), 30 hops max, 60 byte packets

 1  _gateway (10.10.6.1)  1.405 ms  1.915 ms  2.312 ms
 2  10.11.18.105 (10.11.3.50)  7.228 ms  7.376 ms  7.045 ms
 3  * * *
 4 (other dns and IP)..

As we can see, the third one is “hidden”. Is there a way to find it?

mount – Sharing (sshfs) a folder with another Linux machine on the same home network via fstab? UBUNTU 20.04

First and foremost let me thank zx81roadkill for his excellent description of how to share a folder with another Linux machine on the same home network using sshfs. Everything has worked great for me except the last step “10. Enable reconnect after reboot” which involves modifying the fstab file.

While I can mount (and un-mount) the remote folder manually,

sudo sshfs vanmetter@192.168.2.4:/home/vanmetter /mnt/HP-2014-home -o allow_other,default_permissions -o identityfile=/home/vanmetter/.ssh/id_rsa

Mounting via the fstab file results in an error when I try to open the remote folder on my local machine.

vanmetter@192.168.2.4:/home/vanmetter/ /mnt/HP-2014-home fuse.sshfs default_permissions,user,delay_connect,reconnect,ServerAliveInterval=15,ServerAliveCountmax=3,allow_other,identityfile=/home/vanmetter/.ssh/id_rsa,idmap=user,uid=1000,gid=1000 0 0

I have even retyped the entire line to insure no ‘special’ characters were accidentally copied.

Clicking on the mount point for the remote folder results in a reproducible error as followings:

in Nautilus:

**Oops! Something went wrong.**
Unhandled error message: Error when getting information for file "mnt/HP-2014-home": Input/Output error

in Nemo:

Could not display “/mnt/HP-2014-home”.

Error: Error when getting information for file “/mnt/HP-2014-home”: Input/Output error
Please select another viewer and try again.

Finally, if the folder is un-mounted, then mounted manually as shown above, everything is working fine (i.e. remote folder opens and all content are accessible).

Any help would be greatly appreciated as I now have a 99% solution to my connectivity needs.

Thanks,

Richard

lightning network – How can I increase the routing my ‘small’ lighting node performs?

I know this question has been asked a lot. However I am not able to grasp the correct approach to address this.

Let me give you the context: I spun up an LND node to start experimenting and understanding the capabilities of this spectacular technology. Put $100 worth of sats in the node and spread it across 4 channels and I was also lucky to have another 5 channels open with me – so I have some outgoing capacity from the channels I have opened and also some inbound capacity from the channels others opened to me. The channels are unbalanced meaning that, for the channels I opened remote balance is 0 and for the channels others opened to me local balance is 0. I know that channels should be balanced to be able to perform routing in both directions in every channel but thought since others have also opened channels to me, I could still route some transactions. Is this a valid assumption?

Base fee is set to 0 and my fee rate is 0.000001 which I believe is cheap to incentivize some routing. For 4 months now fwdinghistory returns nothing. I thought that with this setup I could easily route just a cup of coffee but it seems we are not there yet.

What can I do to reach the point where I actually perform some routing? I don’t want to commit more capital to the node until I am confident of what I am doing and how things work. Again the rational behind is that 100$ should suffice to route some coffee buys. I understand that the first thing to do is to try to provide liquidity where liquidity is needed but I simply don’t understand how to identify where liquidity is needed.

networking – Unable to connect to any wifi network detected in Xubuntu

I have a HP 620 laptop with Xubuntu 20.04.2 LTS installed. I can see all the Wi-Fi networks available, but unable to connect to any of them. It tries to connect, but I get this error message. Disconnected - you are now offline

The passwords are all correct.

This is my network controller.

Network controller [0280]: Ralink corp. RT3090 Wireless 802.11n 1T/1R PCIe [1814:3090]
Subsystem: Hewlett-Packard Company RT3090 Wireless 802.11n 1T/1R PCIe [103c:1453]
Kernel driver in use: rt2800pci
Kernel modules: rt2800pci

How can I fix this? Any help is appreciated.

After mining rewards go down to 0, can someone clog the Bitcoin network by creating millions of transactions with no fees?

After mining rewards go down to 0, it is possible miners will not pick up transactions with 0 fees. In that case, could someone create millions of transactions with no fees, to congest the mempool and slow down the network?

Any legitimate reason for notepad.exe to make network connections

Is there any known legitimate reason that notepad.exe would make network connections to a domain controller?

lightning network – Why are multi hop virtual payment channels desirable?

There are papers about multi hop virtual payment channels emerging like the Perun paper or more recently the Donner Paper.

The idea seems to be to reserve some liquidity on a path (or potentially flow) of channels between two peers for a longer time to effectively give them a virtual channel in which they can transact as if they had a direct channel.

Why is that better then just using the available liquidity every time one wishes to transact?