Can i access remote SQL server via VPN without firewall?

I’m totally new in SQL Server.But I’m going to work hard on it in this periode. There are two remote SQL server: Server A and Server B. I want to access data of Server B from Server A. Server B does not have firewall and its is a simple router/modem for particular. Can i access Server B via VPN without firewall?
Normally, in order to connect remote SQL server,default port 1433 and TCP/UDP should be enable. But without firewall, is the connection still possible/available? Any tutorial about this topic will be thankful!
If my question does not formulated correctly, please let me know.
I appreciate your time and help.

domain name system – What is impact of Azure Firewall update from default to custom DNS on AKS and VM deployed in other VNets which route to Firewall?

I have 4 Azure Vnets, One Prod(VMs and AKS), 2nd Dev(VMs and AKS), 3rd(Domain Controllers), 4th Azure Firewall and Application gateway. External traffic is only come from 4th Vnet resources.
Vnets peering is set from 1to4, 2to4, 3to4,

Route table from 1st, 2nd, 3rd vnets are set to Azure Firewall private IP.

All Vnets have DNS server added of Domain controller private IPs.

Azure firewall has DSN setting disabled.

I am going to enable Firewall DNS settings and add the Domain Controllers DNS their and enable DNS proxy.

For testing I am going to add Firewall private IP in DNS of Dev Vnet and restart VMs.

What will be the impact on Prod Apps if they are trying to resolve IPs from domain controller?
What will be the impact of Prod apps if they are trying to access azure resources(SQL, storage account)?

can i use wsl,ufw specifically in my windows 10 as a firewall?

i recently found out linux is shipped with ufw that helps with firewall, so i thought if i can a wsl which will be constantly running as a firewall.
I know windows already has a firewall but having two wont be so bad. it might be a dumb thing but i just wanna know if its possible

is there any Best Firewall for website to protect DDos attacks ? apart from cloudflare

is there any Best Firewall for website to protect DDos attacks ? apart from cloudflare

audit – Is there a tool or project to test firewall vendors claims?

I’ve researching different firewall vendors and they have claims like being able to detect and stop exfiltration via tunneling, malware embedded within attachments with passwords and more.

Is there some sort of tool or VM that runs a series of tests/checks (like those found in the NSS Labs reports) so security teams inside organizations can test those claims quickly and in a methodic manner?

networking – What is the purpose of having 2 Cisco ASA 5500-X Series Firewall in a Network?

I just came across a technical proposal for having a control room & server in new york and another control room & server room in Singapore. There will be 2x Cisco ASA 5500-X Series Firewall in a Network (in Singapore server room) with a DMZ. I am not an expert in networking and I couldn’t get the idea of having 2x firewall in the same network. Is there any idea about this?

Also, I have seen a proposal where a network has 1x Cisco has a 5500-X series firewall and also a software subscription firewall in the same network. How does this work?

Whereas most of the network that I came across only has 1x Cisco firewall.

I appreciate if I could understand more about the setup that I mentioned above.

firewall – Ubuntu ufw active but still can connect to my web app

I have server with activated ufw. However I can still use my web app, which is open on port 3041 (through web browser) – how is it possible, what should I change? When I installed nginx the default page was not available until I open the http (80) port. Thanks for advices!

> ufw status verbose
Status: active
Logging: on (low)
Default: deny (incoming), allow (outgoing), allow (routed)
New profiles: skip

To                         Action      From
--                         ------      ----
22/tcp                     LIMIT IN    Anywhere                  
2375/tcp                   ALLOW IN    Anywhere                  
2376/tcp                   ALLOW IN    Anywhere                  
80/tcp                     ALLOW IN    Anywhere                  
443/tcp                    ALLOW IN    Anywhere                  
22/tcp (v6)                LIMIT IN    Anywhere (v6)             
2375/tcp (v6)              ALLOW IN    Anywhere (v6)             
2376/tcp (v6)              ALLOW IN    Anywhere (v6)             
80/tcp (v6)                ALLOW IN    Anywhere (v6)             
443/tcp (v6)               ALLOW IN    Anywhere (v6)  

ids – Replaying PCAPs to test firewall

I am working on a personal project using a custom IDS together with PfSense firewall. There are a few online datasets containing pcap files of benign and attack traffic, my goal would be to replay these pcaps to the firewall so that I can then analyze its response.

I have tried replaying using tcpreplay as it is but it did not work, I have the feeling some addresses need to be changed in order to replay within my network.

Could someone advise me on how I can do this?

network – OpenWrt firewall mystery

I have my home network divided in multiple VLANs, with a main router running OpenWrt forwarding between VLANs, where each VLAN equals a firewall zone. Zone wan hosts the Internet router.

Firewall zone settings in Luci are:

  • default input=ACCEPT output=ACCEPT forward=REJECT
  • private->guest,nas,offsite,wan input=ACCEPT output=ACCEPT forward=REJECT
  • nas->offsite input=ACCEPT output=ACCEPT forward=REJECT
  • offsite->NIL input=ACCEPT output=ACCEPT forward=REJECT
  • guest->wan input=ACCEPT output=ACCEPT forward=REJECT
  • wan->NIL input=REJECT output=ACCEPT forward=REJECT MASQUERADING

Now, I have configured Luci’s uhttpd to ONLY listen to the router’s external IP address ( in the private zone (uci delete uhttpd.main.listen_https; uci set uhttpd.main.listen_http=; uci commit; /etc/init.d/uhttpd restart).

Why can I still access, and thereby Luci, from a computer (e.g. located for instance in the guest zone? I was expecting there to be no forwarding from guest->private, but it seems the input=ACCEPT of the guest zone makes the router accept the package addressed to him even the detination IP address is in the private zone.

Is that really intentional?

Kind regards, Sebastian

How can I find out what this Windows Firewall message is coming from?

I get this Windows Firewall notification asking for firewall permission from time to time:

enter image description here

I am not sure what is asking for this firewall permission. Is there any way to find out what program is causing this? I don’t have a 24836000… file in c:. I have different kinds of programs installed on this computer including webservers, but I don’t have them running in the background all the time.

OS: Windows 10 Home build: 19041.746