Questions tagged [network-security]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
1
vote
0answers
40 views

Is there a way to modify specific IP options through iptables?

In IP header there is a option 130 - specified in RFC 1108, it adds some security options for IP packet, like mandatory access control levels and categories. My task is to try to modify at least level ...
0
votes
0answers
16 views

Send command to another machine in a secure credential way

I have a question to ask you: I am creating a script to use with certbot for the renewal of certificates via DNS, everything works correctly on the same machine where BIND is also running (this ...
0
votes
1answer
33 views

Network Mapped Drives sensitive information leakage when changing LAN networks on Windows

Assuming the following or similar setup of network drives/locations on a Windows 7+ system originally connected to a TrustedLAN: TrustedLAN Gateway: 192.168.1.1 /24 TrustedLAN Windows System IP: 192....
0
votes
0answers
38 views

Reset MTU with forged ICMP Type 3, Code 4 packet

I have four Virtual machines in this configuration configuration Router A and Router B are communicating each other beetween an IPsec implementation. So beetween them there is a tunnel up, and when A ...
0
votes
2answers
86 views

Security implications of directly connecting a Windows PC to ISP via Network Adapter with Ethernet cable bypassing the Router

When diagnosing Internet connection issues (slow speed for example), an ISP technician may ask a user to connect their ISP-provided Ethernet cable directly to a device (typically a Windows PC) to run ...
0
votes
0answers
19 views

GLOBAL lockout of ALL external incoming access attempts

I have stripped down my /etc/services file to bare minimum (according to my awareness of what is needed) for a Linux DESKTOP configuration accessing remote services and offering no services to remote ...
1
vote
0answers
44 views

Location of authpriv.notice logs on Bitnami

I have a Bitnami server, Ubuntu Xenial, on AWS LightSail. I followed this tutorial to restrict SSH connections by country. This script ipfilter.sh filters IP addresses: #!/bin/bash # License: WTFPL # ...
0
votes
1answer
170 views

Does GCP Cloud Armor support TCP load balancer? I am unable to add TCP load balancers as a Targets in Cloud Armor?

In the GCP cloud armor documentation, it is mentioned here, that it supports HTTP(S) and TCP load balancers to be configured. But I am unable to add TCP load balancer as a Target in Cloud Armor as it ...
0
votes
2answers
839 views

netsystemsresearch.com on my internal network

It first started happening with the local network enabled printer. It printed out that netsystemsresearch.com was doing a search of all public networks. I stopped that by disabling outside connections ...
-5
votes
1answer
37 views

Which mobile VPN type, of IPSec, SSL/TLS, and SSH, would be better for travelling workers? [closed]

Not too sure on the specifics of each that would make one better for travelling.
0
votes
0answers
7 views

Secure Local Windows Web Server within Corporate Network

We have a local web server setup on a conference room computer that will allow people with smart phones to control the conference room (start video meeting, run preset programs, etc). The local web ...
1
vote
0answers
200 views

Do we need Fail2ban for VPN server?

we are using Ubuntu 20.04 LTS vps and running OpenVPN on it. We use certificate key to login to SSHD and the vps is not using any other program(eg. webserver etc). Would you recommend installing and ...
0
votes
1answer
115 views

AWS - VPC traffic being dropped - how to debug Network ACL and security group?

I have an AWS VPC with two subnets: Public and Private. I can access the internet (via a NAT Gateway) from the public subnet, but not from the private subnet, and I can't work out what's wrong. Both ...
0
votes
1answer
162 views

NACLs and NAT Gateways for public and private subnets

I have a VPC with 3 subnets: Public (FE layer, inbound internet access only) Protected (app layer, outbound internet access only) Private (DB layer, no internet access at all) The public subnet NACL ...
0
votes
0answers
94 views

Isolate Docker containers from processes running on the host

By default, a Docker host drops network packets targeted at its container, unless those packets are responses to connections initiated from within the container. Initiating a connection to a container ...
0
votes
1answer
121 views

AWS: VPN between VPC and an external resource with IKEv2 and ESP

I need to set up a VPN tunnel between the VPC in AWS and an external server with content that I want to access securely. The idea is to use the Site-to-site VPN Connection with Virtual Private Gateway ...
0
votes
0answers
23 views

Policy — Network isolation for known-vulnerable systems

My client has some systems that can't be patched for a variety of reasons. We have a remediation program underway, but we need to isolate those vulnerable servers until the replacement systems come ...
2
votes
1answer
363 views

Apartment-wide single SSID / multiple password Wi-Fi network security concerns?

My apartment building is changing internet providers, and the new provider plans to install a network that will have a single SSID for the entire building. Each tenant will be given a unique password ...
0
votes
1answer
32 views

Would proxying ssh be insecure

If I would use something for remote port forwarding like ngrok, or Serveo: ssh -R 80:localhost:22 serveo.net Would this pose a treat to my security since there is a man in the middle? How would I ...
1
vote
0answers
94 views

Install SMBv1 client on win10 without admin or compromising security? [closed]

This relates to Sending files from win10 to SMBv1 server? but it is broader. Feel free to edit/move/remove. Windows 10 update 1803 removes all functionality of SMBv1 unless explicitly set so by admin,...
3
votes
1answer
558 views

Security Considerations of AWS Private Subnet vs Private Security Group

AWS Virtual Private Cloud allows several ways of restricting access to devices on the VPC network from the Internet. 1) Place devices into a private subnet (no Internet Gateway). Each device can ...
0
votes
0answers
65 views

Get information about MAC address

My router (FritzBox 7330) shows tons of errors about a device that continuously try to connect to my network: 23.12.19 10:17:07 Registrazione del dispositivo wireless fallita: chiave wireless ...
1
vote
1answer
52 views

Can user credentials from HTTP session be seen through Wireshark? [duplicate]

Can we get that info the same way we do for FTP since HTTP is a plain text protocol?
0
votes
2answers
364 views

Prevent Unjoined-to-domain computers from connecting to my network

How to prevent any computer that is not joined to the domain from requesting any service from my network? Considering that the computer is on another network.
1
vote
1answer
63 views

What to do with log entries indicating intended attacks at my server

Since last week I am running a web server (Apache2 on Ubuntu, accessible by IP only) and I reckon that I am most vulnerable now that I don't know well what to pay attention to, so I'll ask the experts ...
0
votes
1answer
488 views

Multiple internet connections and single firewall appliance

The company that I work for has three internet connections. We're planning to install a single firewall appliance that covers all of the three connections. I can theoretically imagine it being done ...
-2
votes
2answers
43 views

Can admin monitor what websites has be accessed? [closed]

I am using my company laptop, where is being monitored by company admin. They have install Windows 7 OS on all laptops and some other security packages. Currently I am usnig laptop outside my ...
11
votes
3answers
1k views

If public IPs are pinned to a single AS, how does BGP anycast work?

It is my understanding that public IP blocks are assigned from IANA, which assigns sub-blocks to RIRs, which assigns sub-blocks to ISPs, which assigns sub-blocks to individual ASs as outlined in this ...
0
votes
1answer
1k views

Tool to manage windows shared folders and their permissions

I remember there was a tool to easily manage shares for Windows. But I don't remember anything about it. My case is mostly used configuration but in windows is very hard to manage user permissions ...
1
vote
2answers
734 views

encrypting network traffic passing over 'untrusted' segment of Ethernet cable

let's say i have two office spaces in a multi-tenant building. landlord was kind enough to provide me with copper cat 6 cable connecting both of the disjoint spaces. i could just attach network ...