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Questions tagged [firewalls]

Concerned with software or hardware firewalls

0
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0answers
27 views

router/modem bridge mode security [closed]

I thinking about using my TP-Link TD-W8950ND as a modem, by enabling bridge mode and disable the firewall and the DHCP. There is any risk my router/modem will be vulnerable to WAN attacks by doing ...
0
votes
1answer
62 views

Country Blocking

I use a Meraki firewall and want to block outside attack attempts. Is there a list of countries that are known to be malicious? I want to load them into the system and GEO block them. I know that some ...
0
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0answers
20 views

PHP socks proxy with no port opening

let's say i have file apache file access on a webserver, but due to firewall rules etc, i can't connect to ssh and can't open a port. Is there a way to do this exactly this : create a socks proxy on ...
1
vote
1answer
60 views

Fortigate Creating Millions of DNS events to standard domains

I am trying to tune our SIEM and noticed that we are receiving millions of DNS records every day from the same domains. These are: update.microsoft.com swscan.apple.com softwareupdate.vmware.com ...
0
votes
1answer
64 views

Secure onion router setup [closed]

I would like to setup a Raspberry Pi as an onion router, but I have some questions about it. At home I am using a Fritz!Box to connect to the outer world (to the net of my ISP). Would it make any ...
0
votes
0answers
11 views

Why Does Windows Server Block ICMP By Default? [duplicate]

I am conducting a OpenVAS vulnerability scan on a Windows Server 2012 box and it came back empty. It turns out that the scanner checks to see if the host is alive by sending it a ping request--if it ...
0
votes
0answers
33 views

Diffie-Hellman Group 25, and 26? [migrated]

Looking here: https://www.sonicwall.com/en-us/support/knowledge-base/180427163815045 It appears that our firewall supports DH group 25, and 26. Almost everywhere I've seen, they've recommended DH ...
0
votes
0answers
25 views

Distributed network with one host behind dmz and the other without

Context: This a question from my homework assignment. There is a company with two sites A and B. B is behind DMZ (firewall - proxy mail server - firewall) and A is just behind a firewall Network A ...
0
votes
1answer
32 views

IPsec down with unusual SNMP traffic [closed]

Time to time IPSec tunnel status become down, with unusual SNMP Traffic. when I disable and enable port manually, it become normal. I am using 200E fortigate firewall. Have you any idea or previous ...
0
votes
0answers
72 views

Meaning of Internet Hub Firewall IN/OUT traffic? [closed]

I understand that... IN: BLOCK [16] Remote admin... (TCP [185.152.190.46]:1747-​>[3v.vv.vvv.vvv]:8080 on ppp3) ...refers to the HUB's (ISP) Firewall blocking an attempt from the Outside In-to the ...
0
votes
1answer
59 views

Types of firewalls to implement to reduce DoS attacks in POS systems

Would you need an internal, external and a host-resident firewall for each POS client?
-1
votes
1answer
98 views

How to safely expose a computer to the Internet with a public IP

Our LAN is configured behind a load balancing router, in turn connected to a modem assigning public IPs to connected devices. I am required to randomly test the connection effective throughput, ...
0
votes
1answer
57 views

How do I configure a home router to block traffic to and from specific geographic regions? [closed]

My mom keeps typing in wrong URLs with typos and getting sent to Chinese typosquatting malware or fraud sites, so I want to configure my home router to block all traffic to and from China as much as ...
1
vote
1answer
102 views

Do I need two firewalls or is one enough?

We have a bunch of company devices (servers, desktops, laptops, company-issue phones, etc). All of these devices are company devices, every employee uses them just for business. All devices should ...
1
vote
1answer
68 views

Understanding port scanning with firewall enabled

My objective is to do a port scanner in windows and find the ports which are open. Suppose, I run an application which opens up a port 8000. Now I create a new inbound rule to block all incoming ...
0
votes
2answers
113 views

Do I have to block UDP ports when I launch my own server with a public IP?

I am trying to give better security to my Raspberry sever. When I installed UFW, I allowed just port 80/tcp and my own high port for SSH communication, and by default are all others ports "deny". ...
3
votes
1answer
107 views

Firewall Showing 1,000's Of Strange GET Parameters Being Sent To Login Page?

So I woke up today, and checked my Firewall Events on CloudFlare for my website like I do normally. Most of the time I'll just see thousands of failed SQL injection attempts, but this morning I was ...
1
vote
0answers
33 views

health check to test haproxy — request deny with 200. good idea?

I have been working on a multi-provider redundant load balancing solution using HAProxy, AWS, and Cloudflare. I have a solution, and I believe it will be secure, but I am looking for further ...
0
votes
2answers
92 views

What is the thought process behind, Endpoint protection is better than firewalls?

I keep reading about, and seeing people post and recommend in the oddest places, that strong endpoint protection is better than having a in-service/supported/receiving security updates firewall. What ...
3
votes
0answers
118 views

How can Nmap bypass Windows Server firewall rules?

I need to block all communication (inbound/outbound) from server A to server B (all ports/all protocols). Server A should communicate with every machine except server B. I can't place firewall rules ...
-1
votes
1answer
42 views

Infection of malware

Lets say, My firewall is configured to block any incoming connections My browser doesnt allow any traces and scripts I have vpn on My browser always asks before downloading files My browser doesn't ...
1
vote
0answers
45 views

UFW (Uncomplicated Firewall) Question

I was wondering if there's any benefit of adding following rules to a Raspberry-Pi directly exposed to the internet: sudo ufw deny to 0.0.0.0/8 && sudo ufw deny to 169.254.0.0/16 && ...
0
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0answers
50 views

Anonymous configuration for racoon

My firewall alerted me of a connection attempt via racoon, the IKE key management daemon to set up an IPSec tunnel. It was clear that when I looked up the IP address 122.228.10.51 this was suspicious. ...
0
votes
1answer
151 views

IDS and IPS placement in network? [duplicate]

What is the good practice for the placement of IDS (NIDS) and IPS? Before the firewall or after the firewall? and why?
2
votes
2answers
116 views

How are stateless firewalls useful in public cloud platforms?

I'm trying to understand the value of stateless firewalls in public cloud platforms like Network Access Control Lists (NACL) in Amazon Web Services (AWS). I think I know a few ways I can use them, but ...
3
votes
2answers
163 views

How IDS and Firewall Logs are aggregated and feed aggregated log to SIEM?

I am studying SIEM tools. Firewall logs will be different from IDS logs and even from Antivirus logs. How can log aggregation take place?
1
vote
2answers
108 views

Can an ISP limit what security software (firewall) that will work?

My ISP (JCOM) says that McAfee is the only security software that will work with them. Is that true? The system is running Windows 7 Home Premium Japanese Version. The McAfee system is provided by ...
1
vote
1answer
94 views

Being connected to a trusted VPN, do I still need personal firewall, and if so, why?

Background Hardware: Dell Inspiron 15 Gaming 7577-92774 with recent BIOS (16-Aug-2018) Operating System: Windows 10 Pro, version 1803 (Build 17134.285) Antivirus / Firewall: ESET Smart Security ...
0
votes
2answers
104 views

Have firewall and VPN already, should I buy a mini router to protect my laptop?

I often travel for business and use hotel wifi. I have installed Little Snitch and VPN-Outline for internet security. Should I buy a mini router? Will it keep my computer safer? Otherwise,with or ...
68
votes
5answers
10k views

Advised to block all traffic to/from specific IP addresses

My CFO received an email from a director at a financial institution advising that all traffic (inbound and outbound) from certain IP addresses should be blocked at the firewall. The director at the ...
-1
votes
1answer
181 views

What are the Pros & Cons of VPN server behind or in front of firewall? [closed]

What are the pros and cons of a VPN server behind or in front of the firewall? There seems to be no right or wrong in either option. An example of the VPN server in front of the firewall:
0
votes
1answer
174 views

Is it advisable to accept STUN server connections?

My firewall reports outgoing connection attempts via com.apple.WebKit.Networking to a number of STUN servers (namely, stun.nas.net, stun.node4.co.uk, stun.voxox.com and stun.wwdl.net). This is ...
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0answers
72 views

Azure SQL Database and corporate networks

I have question around DLP from a corporate network. I have a Virtual Machine on a corporate network. The VM can access an Azure SQL DB in the cloud: aaa.database.windows.net However, I don't want ...
-2
votes
2answers
224 views

Why is DDOS is one of the most common Cyber-Attack? [closed]

Based on some articles and some research DDOS is one of the most common cyber-attack. There are tonnes of articles out there about the DDOS subject, including describing, mitigating, the question "...
1
vote
2answers
50 views

Do I need Gateway Firewall for IoT network? [closed]

Do I need a gateway firewall to prevent attacks like DoS, if my IoT network can only talk to cloud using IPsec? Even if there is need that can be implemented at cloud. Is there any need for it to ...
1
vote
2answers
121 views

Am I being Hacked? So many defferent ip's in router firewall logs [duplicate]

My router dsl light was not stable; It keept disconnecting and connecting..So I logged into Router Homepage to check whats wrong and found there were so many different ip's in Router firewall logs I ...
0
votes
3answers
212 views

Is It More Secure to Use Firewalls from Two Different Vendors?

The topic is "Is It More Secure to Use Firewalls from Two Different Vendors " Is not much safer using a multi-vendor firewall because "More than 95% of firewall breaches are caused by firewall ...
1
vote
1answer
170 views

The role of Machine Learning In Cybersecurity Defense [closed]

Hackers and malware are one step ahead of cybersecurity experts, and every time technology is released to the market, vulnerabilities will be quickly discovered and exploited. How effective can ...
0
votes
1answer
105 views

Root CA or Intermediate CA in firewall trust store

I am implementing a PKI for a test environment and have everything just about configured. The architecture consists of a Root CA, two issuing (intermediate CAs), and clients. Client certificates and ...
2
votes
2answers
56 views

Network provider blocking URL, even though connection made to IP

I came across an interesting case today, which with my limited knowledge I'm unable to understand the working of. I was trying to access a bit.ly link, but it is blocked by my University. Knowing ...
0
votes
1answer
39 views

Telling the difference between firewall block or external problem with Page Cannot be Displayed (IE) [closed]

In our organization, when users run up against the firewall in Internet Explorer, this is what they see: The classic IE "Page Cannot Be Displayed". Of course, this is also what you see when it's ...
1
vote
0answers
36 views

Are parts of my system susceptible to IP based malicious attack even with effective IPtables rules?

Yesterday I installed Cent OS 6 and had to flush the default IPtables rules (IPtables -F) in order to access a web app via my browser. Having very little experience with Linux/Network security this ...
0
votes
1answer
129 views

Differentiating between IKEv2 and OpenVPN Traffic

There is a WiFi network that I regularly use, and it seems to be blocking all VPN traffic other than IKEv2. I tested this by downloading many of the free/freemium VPN apps from the Google Play Store ...
0
votes
1answer
65 views

Would it be possible for a malicious user to change the LAN IP address of an uncompromised device?

I have a local network and an IPCam (with its own storage) in it. Due to some practical limitations, I cannot use technologies such as AP isolation or VLAN to isolate low-integrity and high-integrity ...
1
vote
1answer
157 views

Could an attacker spoof a whitelisted IP to access the network?

There is a network that is protected with a firewall and only one IP is whitelisted. Assuming the attacker knows the whitelisted IP, what would prevent an attacker from sending traffic via a spoofed ...
0
votes
2answers
173 views

Is an ACL Sufficient for business firewall?

I am a relatively new IT specialist for a small company (about 30 employees, 100 more seasonal.) Most of our systems have been outsourced to an IT company long ago, that handles licensing, VDI, PBX, ...
1
vote
1answer
81 views

Refusal to 'open' up corporate network?

I am working a project which requires access to a service running on a remote server, over a single TCP port (>1024). This service runs on a machine located within an existing network, and the project ...
2
votes
3answers
89 views

Whitelisting DNS vs. Packet filtering Firewall

I am an information security intern for a MSP. The company is set up to work remotely a few days a week. As I was gathering information for the assessment, I found out that one of the employees does ...
1
vote
2answers
3k views

Can a hacker hack into port 80?

We normally say port 80 is firewall friendly. But can a hacker just hack into port 80 via TCP or UDP? Or is Port 80 by default not always open? It waits for the host to initiate a connection via ...
1
vote
2answers
2k views

Should I allow communication on public networks?

I apologize if this is a newb question. Reading this prompt, it appears that I should check Private Networks and uncheck Public Networks. However, Windows defaults to the opposite being checked. Am I ...