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Nov
24
comment What does the following UDP connection mean?
It's not really a UDP connection. It's an SNMP connection, over UDP.
Nov
23
revised Why are connections in FIN_WAIT2 state not closed by the Linux kernel?
added 7 characters in body
Nov
23
answered What does take all the cpu here?
Nov
23
comment What does take all the cpu here?
There's no problem that needs to be fixed. He's not using his CPUs, so they're being given to someone else. Why is that a problem?
Nov
23
comment When a socket switch to TIME_WAIT state, why I can't see its inode number?
Sockets don't change to TIME_WAIT state, connections (or endpoints) do.
Nov
23
answered Why are connections in FIN_WAIT2 state not closed by the Linux kernel?
Nov
20
comment Our server is launching brute force attacks on other websites, please advise
Nuke it from orbit.
Nov
16
comment Drawbacks of setting a high I/O timeout?
"The way I see it, the risk is that the delayed I/O accumulate and fill up the I/O queue, crashing the system." That makes no sense. What I/O queue are you talking about? How could reads accumulate? And if this was a problem with writes at all, what would stop writes from accumulating regardless of the timeout?
Nov
12
comment Why wont my server start
You forgot to ask a question. What's your question exactly? And why did you stop in the middle of describing the problem? (Does the file referred to in the error message exist? What are its permissions? Etcetera.)
Nov
10
comment Can a RAID card be used just to connect an optical drive?
@xtian Unfortunately, it can be pretty hard to tell. Most "real" RAID cards that do actual hardware RAID cannot support non-RAIDable devices. Most "fake" RAID cards that are basically just regular controllers can.
Nov
8
answered Can a RAID card be used just to connect an optical drive?
Nov
2
comment allow only one ip and block others by using cmd in windows firewall
Allow only one IP address as what or to do what?
Oct
29
comment Is a 64 or 32-bit VirtualBox guest better on a 64-bit host?
Nothing about this answer is right. If it's talking about 64-bit systems in general, there's not even a guarantee that it will let you use more memory. If he's talking about these specific systems, there are many differences other than being able to use more memory. For example, more registers. There are lots of benefits to a 64-bit system beyond accessing more physical memory. For example, you can memory map large files.
Oct
28
comment Connection refused on port 4000
Is Jekyll running? Is it listening on port 4000?
Oct
27
comment Routing to a secondary IP address on the same network interface
Which of the router's IP addresses can you ping from 192.168.1.2? And did you do any troubleshooting? (Does an ARP request go out? Do you get an ARP reply? Does the ping go out? Etctetera)
Oct
26
comment Drop first packet for every IP with iptables
How is the flood harming you? Is it overwhelming the CPU? Congesting a link? Or what? Where is the firewall relative to the server that is under attack? You're asking how to implement something that you think will solve the problem without explaining to us what the problem is, and that's likely to get you answers that won't solve the actual problem.
Oct
19
revised MySQL using more memory than it can?
added 1 character in body
Oct
19
answered MySQL using more memory than it can?
Oct
14
comment why is my ping to 10.8.0.1 going through the public internet
You should configure your router not to send packets with private destination addresses to your Internet service provider. You can do this either with a packet filter or with a null route. This will also protect your privacy -- you don't want "leftover" packets following your default route if the VPN closes.
Oct
14
comment why is my ping to 10.8.0.1 going through the public internet
@coffeekid Correct. You should be polite (and protect your privacy) by adding either a null route or a firewall rule to prevent such packets from following your router's default route.