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  • 0 posts edited
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  • 28 votes cast
Mar
28
comment Seeing traffic destined for other people's servers in wireshark
@Publiccert Firewalling won't help much if someone else sees your network traffic.
Mar
28
comment Seeing traffic destined for other people's servers in wireshark
Another thing to note about switches is that they can "act like" hubs if they are overloaded with traffic. One malicious hacking technique is to overload a switch so that you can see all traffic on the subnet. I used to work at a large enterprise that foolishly used one large 10.0.0.0/8 subnet and the enterprise class switches would get overloaded all the time and start spewing traffic everywhere. 40-60% of the network was arp traffic. YIKES!
Mar
4
awarded  Yearling
Feb
6
awarded  Nice Answer
Jun
23
revised High CPU utilization but low load average
Should really say load average and not just load.
Feb
13
answered Cron job ignores part of trigger url
Feb
13
comment High CPU utilization but low load average
I mean if you have a non-multithreading process (ie, one that just uses a single CPU at a time). For instance if you just write a simple C program that runs a busy loop, its just a single thread running and uses only 1 CPU at a time.
Feb
12
awarded  Yearling
Feb
12
answered High CPU utilization but low load average
Feb
12
revised Why is this China IP hitting my web site?
Wanted to expand upon my response.
Feb
8
comment Access files located on the underlying filesystem of an NFS mountpoint
Actually this is very useful in a specific case and I wish I had know about this option a long time ago. I just ran into this situation again. Basically I had a /usr directory that was tied to the root filesystem and wanted to move it to its own filesystem to recover space on root. So after making usr and migrating the data there and rebooting to mount the new usr, how do you easily remove the old /usr data? One way is to use single user mode and hope nothing is using files there. Another way is to use this bind trick and remove the data directory from an alternate path.
Nov
20
answered Redhat doesn't set my desired hostname on reboot
Sep
24
awarded  Autobiographer
Jul
2
awarded  Popular Question
Oct
16
awarded  Critic
Aug
18
awarded  Scholar
Aug
18
accepted lvm physical volume set not allocatable after server move to virtual machine. Can I change it?
Aug
18
answered lvm physical volume set not allocatable after server move to virtual machine. Can I change it?
Jul
27
awarded  Student
Sep
4
comment Bandwidth monitoring on KVM
Thanks for posting this. Given the general lack of information like this on the net (or just the difficulty finding it), you'd think that 99% of the people using KVM don't have customers. :-P