-1
votes
1answer
30 views

statistics on port 22 blocking [closed]

What are the statistics on port 22 blocking by firewalls in small and medium sized enterprises? We have a product that a customer installs on a PC, which communicates via ssh to our cloud server. It ...
0
votes
1answer
333 views

Block SSH access from specific countries

I found this handy script online, and would like to modify it to only block SSH access but I don't know anything about iptables and Im afraid Ill kill my system as i have no physical access to it. ...
0
votes
1answer
54 views

Port periodically blocked

I'm wondering what are the possible ways to block some port while it is in use by some other process? Short story long: I've got an app(1) that communicates with another app(2) on one host/local ...
1
vote
2answers
169 views

Where is traffic destined for a specific TCP port being blocked?

I have a server that is set up to listen to a specific port (1433), and normally there is no problem accessing that port from anywhere. From one of the locations I work, however, I can't connect to ...
4
votes
3answers
334 views

Can i safely block all ports on my sever

I have a web server running pleks and get attacked a lot every day. I configured a firewall, and there are some predefined services such as www, and ftp, etc. I am planning to block all the ports ...
26
votes
16answers
26k views

Why Block Port 22 Outbound?

I'm a programmer, and I have worked for a few clients whose networks block outgoing connections on port 22. Considering that programmers often need to use port 22 for ssh, this seems like a ...