10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Below is what i did to open the firewall port on
# sudo firewall-cmd --zone=public --add-port=27012/tcp --permanent
Warning: ALREADY_ENABLED: 27012:tcp
success
# sudo firewall-cmd --reload
success
# firewall-cmd --list-all
public
target: default
icmp-block-inversion: no
... (10 Replies)
Discussion started by: mohtashims
10 Replies
2. IP Networking
My son does homework on a school laptop. I was thinking about setting up a gateway on my home network, so that I can monitor web traffic and know if he is doing his homework without standing over his shoulder. Ideally I would like to use the Raspberry Pi Model b that I already have. However, I... (15 Replies)
Discussion started by: gandolf989
15 Replies
3. AIX
Hi Friends,
How to do port forwarding in AIX? We would like to re route traffic from port A to port B on AIX LPAR.
for example: my application is using 8080 port on LPAR and would like to use the 8081 instead of 8080. By default application was configured with 8080. But instead of changing... (2 Replies)
Discussion started by: System Admin 77
2 Replies
4. UNIX for Advanced & Expert Users
Hi All
I am resilience testing an application that is spread across multiple servers.
One thing I will need to do soon is throttle the network traffic for specific interfaces within the test cluster. Specifically, maybe make a connection take twice or three times as long to respond....
I... (3 Replies)
Discussion started by: bbq
3 Replies
5. IP Networking
I am trying to block ALL traffic except when from ports 9100,22,23 to destination network 192.0.0.0 (my WAN): 2 networks 192.0.3.0 with static route to 192.0.0.0
Shouldn't this work?:
iptables -A INPUT -p tcp -d 192.0.0.0/24 --dport 22 -j ACCEPT
iptables -A INPUT -p tcp -d 192.0.0.0/24... (3 Replies)
Discussion started by: herot
3 Replies
6. Solaris
Hi Everyone,
In my environment, I have few T5220. On the iLOM Management Card, I have both Network and Serial port are cabled, I don't have any issues while I try to connect using Network Management port, but when I try to connect the serial port for the same server which is actually connected... (3 Replies)
Discussion started by: bobby320
3 Replies
7. HP-UX
I Colleagues,
Somebody can say me how to monitoring traffic in the network. also I am interested in monitoring memory. if somebody to know a guide with command advanced in unix welcome for me.
Thank you for adcanced. (0 Replies)
Discussion started by: systemoper
0 Replies
8. Infrastructure Monitoring
Hi all,
Got a strange one here, well not so much strange, different :-)
I need to work out if a server is particulary chatty, whether its talking / communicating heavily to a particular server, as Im planning to physically move the server to a different server, over a link. Hence the... (6 Replies)
Discussion started by: sbk1972
6 Replies
9. Cybersecurity
Hi,
Can someone give me the clue on how to capture network traffic at gateway.
Thanx (2 Replies)
Discussion started by: kayode
2 Replies
10. UNIX for Dummies Questions & Answers
there are commands to monitor the memory, paging, io... how about network traffic. i mean commands to see whether the network traffic (LAN) is congested? the closest i got is netstat
thanks (6 Replies)
Discussion started by: yls177
6 Replies
udp(4p) udp(4p)
Name
udp - Internet User Datagram Protocol
Syntax
#include <sys/socket.h>
#include <netinet/in.h>
s = socket(AF_INET, SOCK_DGRAM, 0);
Description
UDP is a simple, unreliable datagram protocol that is used to support the SOCK_DGRAM abstraction for the Internet protocol family. UDP
sockets are connectionless and are normally used with the and calls, though the call can also be used to fix the destination for future
packets (in which case the or and or system calls may be used).
UDP address formats are identical to those used by TCP. In particular, UDP provides a port identifier in addition to the normal Internet
address format. Note that the UDP port space is separate from the TCP port space (for example, a UDP port may not be ``connected'' to a
TCP port). In addition broadcast packets can be sent (assuming the underlying network supports this) by using a reserved ``broadcast
address''; this address is network interface dependent. The SO_BROADCAST option must be set on the socket for broadcasting to succeed.
Diagnostics
A socket operation may fail with one of the following errors returned:
[EISCONN] Try to establish a connection on a socket which already has one, or when trying to send a datagram with the destination
address specified and the socket already connected.
[ENOTCONN] Try to send a datagram, but no destination address is specified, and the socket has not been connected.
[ENOBUFS] The system runs out of memory for an internal data structure.
[EADDRINUSE] An attempt is made to create a socket with a port that has already been allocated.
[EADDRNOTAVAIL]
An attempt is made to create a socket with a network address for which no network interface exists.
See Also
getsockopt(2), send(2), socket(2) recv(2), intro(4n), inet(4f)
udp(4p)