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-1
votes
2answers
71 views

how to prevent non-admin user to gain admin access using overflow [closed]

There are all sort of coding best practices to prevent stack overflow attack but that is not what this question is about. What I want to know is how to prevent a legit non-admin user running a piece ...
0
votes
1answer
303 views

Kernel: dst cache overflow

I'm under continuous floods at time that are generally of lower magnitudes. I've observed my system often to become totally unresponsive on its network while I observed this in the logs, kernel: ...
0
votes
0answers
32 views

How to reset CPU counters? [duplicate]

I have a Linux server (Debian 2.6.32-46-amd64) which has been online for 117 days. The server is basically an Apache + MySQL, and MySQL was usually at 100~200% CPU usage (using top) being the server ...
1
vote
2answers
69 views

How can I boot Linux with too many logical volumes?

I've created 45 logical volumes (and one extended) with fdisk on a non-boot HDD. Now the system refuses to boot, as well as any Linux live CD, that I've tried. Computer always turns off just after ...
2
votes
1answer
111 views

Need Tips for Expanding My Organisation's Guest Network

I work for a Conference Center and we are rebuilding the network for our guests to use. I am functionally a high school intern with relatively little networking experience but I have so far put in a ...
1
vote
1answer
515 views

Failed PCI Compliance - Port: 21 Protocol: tcp | Summary : attempts some buffer overflows

We have had PCI compliance for about 4 months straight then all of a sudden this comes up: Fail Serious Port: 21 Protocol: tcp Summary : attempts some buffer overflows CVSS Base Score : 10.0 ...
1
vote
2answers
730 views

“Relay access denied” overflowing postfix mail.log

My mail.log is overflowing with random spammers attempting to send spam through my server. Is this typical or have I misconfigured something? Is there a way to ban an IP after several attempts of ...
0
votes
3answers
65 views

Does apache/PHP has overflow problem if the developer doesn't tweak it at all?

Is apache/PHP self secured so that developers don't need to care about it?
0
votes
2answers
892 views

TCP sequence counter overflow

I have got the following question from a course: "Assume a TCP connection over the internet with a useable bandwith of 300Mbps. Assume that some packets are transported with a very high delay. At ...