iptables -I INPUT -s <IP_ADDRESS_TO_BLOCK> -j DROP
service iptables reload
Sorry but this is not going to work as you have stated here. Once you have given the first line there is no reason to execute the second as it will only reload the saved rules and thus remove the rule you just added. The command to save the running rules is:
Code:
service iptables save
You need to save the running rules first so that you will have them when you reboot.
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)
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)
:) 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)
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)
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)
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)
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)
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)
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)
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 HPUX
xremovehosb
XRemoveHosts() XRemoveHosts()
Name
XRemoveHosts - remove multiple hosts from the access control list.
Synopsis
XRemoveHosts(display, hosts, num_hosts)
Display *display;
XHostAddress *hosts;
int num_hosts;
Arguments
display Specifies a connection to an X server; returned from XOpenDisplay().
hosts Specifies the list of hosts that are to be removed.
num_hosts Specifies the number of hosts that are to be removed.
Description
XRemoveHosts() removes each specified host from the access control list of the connected server. The server must be on the same host as
the process that call XRemoveHosts(), in order to change the access control list.
If you remove your machine from the access control list, you can no longer connect to that server, and there is no way back from this call
except to log out, edit the access control file, and reset the server.
The address data must be a valid address for the type of network in which the server operates, as specified in the family member.
For TCP/IP, the address should be in network byte order. For the DECnet family, the server performs no automatic swapping on the address
bytes. A Phase IV address is two bytes long. The first byte contains the least significant eight bits of the node number. The second
byte contains the most significant two bits of the node number in the least significant two bits of the byte, and the area in the most sig-
nificant six bits of the byte.
For more information on access control lists, see Volume One, Chapter 15, Other Programming Techniques.
Structures
typedef struct {
int family; /* for example Family Internet */
int length; /* length of address, in bytes */
char *address; /* pointer to where to find the bytes */
} XHostAddress;
/* constants used for family member of XHostAddress */
#define FamilyInternet 0
#define FamilyDECnet 1
#define FamilyChaos 2
Errors
BadAccess
BadValue
See Also
XAddHost(), XAddHosts(), XDisableAccessControl(), XEnableAccessControl(), XListHosts(), XRemoveHost(), XSetAccessControl().
Xlib - Host Access XRemoveHosts()