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location Tennessee
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Nov
21
comment Cannot load grub4dos through kexec
Can you boot grub4dos without going through kexec?
Nov
21
comment What is kernel ip forwarding?
@Sree: Yes, but it won't do NAT - you need iptables for that. If you don't want to route/forward packets, don't enable forwarding. It's unlikely a single IP/NIC system needs it enabled unless you are doing something weird with VPNs.
Oct
26
awarded  Famous Question
Oct
19
answered Debian init runlevels
Oct
18
comment Why is dd not protected against writing on the active disk ?
If you are using Debian, or dervied like Ubuntu, work from /dev/disk/by-id instead of the device names in /dev.
Oct
7
comment Can TCP provide more than 65535 ports?
More than 64K ports on a single system is impossible. More than 64K listeners is probably possible, but you have to have proxy or frontend listeners that would "split" incoming connections to the right real "backend" listeners. You could do something insane like an internal NAT to multiple internal IP addresses, for example.
Sep
24
awarded  Autobiographer
Sep
15
awarded  Nice Answer
Aug
28
comment What is the difference between building from source and using an install package?
For the hyperparanoid, one advantage of installing from source is security and the ability to review the code if you are able to and or want to: when you install from source, you know for a fact you have a binary from that source code and not a binary with unknown modifications (assuming you trust the source in the first place).
Aug
18
comment Why doesn't the sudo command need the root password?
sudo has the "setuid" bit set. So it runs as the user who owns it (which is root on all standard systems if I'm not mistaken), not the user who launches it. sudo then loads the /etc/sudoers file and checks what is allowed based upon who launched it.
Aug
9
awarded  Revival
Aug
8
awarded  Custodian
Aug
8
reviewed Approve suggested edit on How to understand the command awk '{for(x=1;$x;++x)print $x}'?
Jul
21
awarded  Necromancer
Jul
16
comment What is kernel ip forwarding?
Typically NAT will work from the LAN to the WAN, so if NIC 2 has a private IP, and NIC 1 has a public 1, you do need NAT; specifically, the internet-facing interface (NIC 1 per above) needs a MASQUERADE rule in iptables's POSTROUTING on a chain to do that. See revsys.com/writings/quicktips/nat.html and i.stack.imgur.com/rzz83.png.
Jul
13
comment What is kernel ip forwarding?
Right, you'll want to do NAT if NIC 2 is a private IP. Linux can do NAT as well and iptables is the way to set it up.
Jul
13
awarded  Enlightened
Jul
13
awarded  Nice Answer
Jun
19
revised What's the difference of the Userland vs the Kernel?
some clarification
Jun
19
answered What's the difference of the Userland vs the Kernel?