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66 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 ...
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1answer
107 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 ...
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1answer
376 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 ...
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2answers
560 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 ...
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3answers
64 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?
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2answers
697 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 ...