02-22-2011
Also,
Please refrain from calling it "Linux 5." The Linux kernel is on version 2.6.3x. Red Hat puts out a distribution called "Red Hat Enterprise Linux" and you are likely on version 5 of that software. Calling it "Linux 5" can cause confusion, even if it is under the Red Hat forums.
That being said,
You may want to look into hosts.deny and perhaps iptables. Hosts.deny will disallow logins from certain areas and iptables can simply drop packets from a particular rule base, which can contain an IP address or range.
10 More Discussions You Might Find Interesting
1. IP Networking
I've got a legit DHCP server on my network. I've got a 3550 as my VTP server providing 4 vlans to 4 2950 switches. If somebody were to plug into one of those vlans with a DHCP server configured then it would throw off my whole network. How could i block the DHCP server that could plug into the... (2 Replies)
Discussion started by: byblyk
2 Replies
2. IP Networking
Hi sir,
i want to make such programe which takes MAC(Ethernet) address of any host & give me its IP address.......
but i'm nt getting that how i can pass the MAC address to Frame........
Please give me an idea for making such program...
Thanks & regards
Krishna (3 Replies)
Discussion started by: krishnacins
3 Replies
3. UNIX for Dummies Questions & Answers
:) Firstly Hi all!!, im NEW!! and on here hoping that someone might be able to offer me some help... i have a server that keeps crashing every few days with the error message:
PANIC KERNAL-MODE ADDRESS FAULT ON USER ADDRESS 0X14
KERNAL PAGE FAULT FROM (CS:EIP)=(100:EF71B5BD)
EAX=EF822000... (10 Replies)
Discussion started by: Twix
10 Replies
4. UNIX for Advanced & Expert Users
Hi Folks
I have been debugging a script that is called every thirty seconds. Basically it is doing a ps, well two actually, one to file (read by the getline below) and the other into a pipe. The one into the pipe is: -
V_SYSVPS=/usr/sysv/bin/ps
$V_SYSVPS -p$PIDLIST -o$PSARGS... (0 Replies)
Discussion started by: steadyonabix
0 Replies
5. IP Networking
Hi there
I lost connectivity to one of our remote systems and when I checked the messages log I found the following:
Aug 10 23:42:34 host xntpd: time reset (step) 1.681729 s
Aug 16 13:20:51 host ip: WARNING: node "mac address" is using our IP address x.x.x.x on aggr1
Aug 16 13:20:51 host... (9 Replies)
Discussion started by: notreallyhere
9 Replies
6. Programming
OS : solaris 10 X86
I created stream socket, tries to connect to port 7 on the remote machine.
After doing the non blocking connect call I did select with time out value is 3 secs. I am always getting timed out though I am writing prior to select.
code:
x=fcntl(S,F_GETFL,0);... (1 Reply)
Discussion started by: satish@123
1 Replies
7. UNIX for Dummies Questions & Answers
I know how to add signal to a set. But what if I want to add 2 or 3 signals to the set.
I know I can use sigaddset (&set,SIGBUS)....but what if I want to add SIGBUS and SIGALRM at once. Do i have to do it like this..
sigaddset (&set,SIGBUS);
sigaddset (&set,SIGALRM);
Is there another way to... (0 Replies)
Discussion started by: joker40
0 Replies
8. IP Networking
Hi
I am starting to practice nmap for my own education.
Now I created two host in virtual box.
Bot are scientific linux, one in installed as web server and the other as developing station.
I tried to run nmap on so I did nmap on their IP address, I got an answer that ip is down or that... (8 Replies)
Discussion started by: programAngel
8 Replies
9. Programming
among the below socket programming api's, please let me know which are blocking and non-blocking.
socket
accept
bind
listen
write
read
close (2 Replies)
Discussion started by: VSSajjan
2 Replies
10. UNIX for Advanced & Expert Users
Hi ,
Could someone let me know how to detect duplicate ip address after assigning ip address to ethernet interface using c program (3 Replies)
Discussion started by: Gopi Krishna P
3 Replies
LEARN ABOUT CENTOS
spacewalk-channel
SPACEWALK-CHANNEL(8) Red Hat, Inc. SPACEWALK-CHANNEL(8)
NAME
spacewalk-channel - Subscribe to or unsubscribe system from channel.
SYNOPSIS
spacewalk-channel [options]
DESCRIPTION
spacewalk-channel allows you to subscribe to and unsubscribe from specified channels via the command line. A visit to the "Spacewalk
Server", "Red Hat Satellite" or "Red Hat Network Classic" website isn't required.
OPTIONS
-l, --list
Print a list of channel(s) that you are currently subscribed to.
-b, --base
Print a base channel that you are currently subscribed to.
-L, --available-channels
Print a list of all available child channels.
-a, --add
You are subscribing system to given channel(s). You have to specify --user and --password.
-r, --remove
You are unsubscribing system to given channel(s). You have to specify --user and --password.
-u, --user
Your username used to register the system with and for Red Hat Network Classic, Red Hat Satellite or Spacewalk. If you do not enter
this option and it is required, you will be prompted.
-p, --password
The password associated with the username specified with the --user option. This is an unencrypted password. If you do not enter
this option and it is required, you will be prompted.
-c, --channel
Label of channel you want to subscribe to or unsubscribe from. Can be specified multiple times.
-v, --verbose
Print out successfull action.
-h, --help
Show a help message and exit.
NOTE
The addition and removal of channels is mutually exclusive, please use the command twice.
EXAMPLES
Subscribe to two channels:
spacewalk-channel --add -c rhn-tools-rhel-i386-server-5 -c rhel-i386-server-vt-5 --user username --password password
Unsubscribe from channel:
spacewalk-channel --remove -c rhn-tools-rhel-i386-server-5 -c rhel-i386-server-vt-5 --user username --password password
List subscribed channels:
spacewalk-channel --list
SEE ALSO
rhnplugin(8), rhn_register(8), up2date(5).
AUTHORS
Miroslav Suchy <msuchy@redhat.com>
BUGS
Report bugs to <http://bugzilla.redhat.com>.
COPYRIGHT
Copyright (C) 2009-2010 Red Hat, Inc.
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
LAR PURPOSE.
Linux 2010 August 30 SPACEWALK-CHANNEL(8)