TLS auth issue: ‘CompanyA@exmple.com “via” SendGrid.me’ email is dropped by Exchange [closed]

Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it’s on-topic for Server Fault. Closed 5 years ago. Improve this question Looking for clarification about what this Exchange 2007 Management Shell (Powershell) command does and how it affects TLS at the Receive Connector: ms-exch-smtp-accept-authoritative-domain-sender … Read more

Is it possible to make me send an email by opening a malicious email? [closed]

Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it’s on-topic for Server Fault. Closed 6 years ago. Improve this question I know I don’t have much info on this problem/question so I will delete if everyone downvotes or votes to close/delete. Is it … Read more

How to check my network for IP spoofing availability?

I want to test if my network or even my ISP blocks spoofed IP packets. I am running a Debian Linux OS. I found this nice tool, but it’s not working on my system .. https://www.caida.org/projects/spoofer/ Does somebody know another way how to check this? Answer You can’t always completely stop IP spoofing IP networks … Read more

Can an attacker exploit the vulnerability of the firewall to access the www server?

What happens if an attacker has found a technique for sending packets through the firewall to the DMZ without the packets being checked? Suppose the attacker doesn’t know the internal addresses of hosts in the DMZ. Can the attacker arrange for a packet to be sent to the www server in the DMZ without the … Read more

DNS Spoofing in Bind9 DNS Server

I configured Ubuntu Server 18.04 as a master DNS server. zone ==> google.com ; ; BIND data file for local loopback interface ; $TTL 12h @ IN SOA ns1.google.com. root.google.com. ( 2 ; Serial 604800 ; Refresh 86400 ; Retry 2419200 ; Expire 604800 ) ; Negative Cache TTL ; @ IN NS ns1.google.com. ns1 … Read more

How to prevent an openly recursive DNS server from being abused for DNS amplification [closed]

Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it’s on-topic for Server Fault. Closed 5 years ago. Improve this question I have a business need to provide an open and recursive DNS. This DNS has of course been heavily abused by DNS amplification … Read more

Make program think that it’s connecting to one IP, but spoof it with another [closed]

Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it’s on-topic for Server Fault. Closed 2 years ago. Improve this question There’s program that can connect to servers, but it’s limited to 6 predefined IPs (although it has ability to connect to other IPs, … Read more