04-22-2014
8 More Discussions You Might Find Interesting
1. IP Networking
Hi,
My small network consists of a mail server(postfix) and 2 clients.
I want to configure the clients so that all the mail they send is sent through the mailserver. I want to forward all outgoing mail to the mail server.
How should I configure the clients to achieve this?
Thanks for... (1 Reply)
Discussion started by: hjallebk
1 Replies
2. Cybersecurity
Hi,
from my workplace we use a proxy to connect to the outside world, including external ssh servers.
The problem is that the server is seeing the connection coming from the proxy and knows nothing about the client behind it. The ssh connection itself works fine, but x-forwarding does not work as... (1 Reply)
Discussion started by: vampirodolce
1 Replies
3. HP-UX
how to get network packet size
I would like get network output rate(kb/sec)
I type command "netstat -i"
Ipkts Ierrs Opkts Oerrs 653387 0 678202 0
but i didn't know what is it packet size ,
how could i get it? (1 Reply)
Discussion started by: alert0919
1 Replies
4. IP Networking
Hi all,
I am working on TUN/TAP for tunnelling IP packets from the application to the network.
I am able to open the tun device and assign the IP address to tun0. The steps I followed are given,
1. Opened the tun device /dev/net/tun
2. Assigned a IP address to the tun0 using ifconfig... (5 Replies)
Discussion started by: johnniealan
5 Replies
5. HP-UX
Hello,
I'm writing to you because I encountered the following problem. My program displayes all network interfaces that are available in the system, but I would like to add a functionality in which a user can enter a destination address IP (ex. the IP address of the Google search engine) and will... (1 Reply)
Discussion started by: foxrafi
1 Replies
6. SCO
Hi everybody
My SCO 5.0.2 OpenServer got its kernel corruptions and network stack was accicentially deleted. I would like to know if we have any chance to rebuild its kernel and network stack.
Any help will be great thankfully appreciate
TN (1 Reply)
Discussion started by: TinhNhi
1 Replies
7. UNIX for Dummies Questions & Answers
Hi,
I am new to the linux kernel development area. I want to know what is the difference between kernel mode stack and user mode stack? Does each process has a user mode stack and a kernel mode stack?? Or Each process has a user mode stack and there is only one kernel mode stack that is shared by... (4 Replies)
Discussion started by: saurabhkoar
4 Replies
8. AIX
(5 Replies)
Discussion started by: Vishal_dba
5 Replies
LO(4) BSD Kernel Interfaces Manual LO(4)
NAME
lo -- software loopback network interface
SYNOPSIS
device loop
DESCRIPTION
The loop interface is a software loopback mechanism which may be used for performance analysis, software testing, and/or local communication.
As with other network interfaces, the loopback interface must have network addresses assigned for each address family with which it is to be
used. These addresses may be set or changed with the SIOCSIFADDR ioctl(2). The loopback interface should be the last interface configured,
as protocols may use the order of configuration as an indication of priority. The loopback should never be configured first unless no hard-
ware interfaces exist.
If the transmit checksum offload capability flag is enabled on a loopback interface, checksums will not be generated by IP, UDP, or TCP for
packets sent on the interface.
If the receive checksum offload capability flag is enabled on a loopback interface, checksums will not be validated by IP, UDP, or TCP for
packets received on the interface.
By default, both receive and transmit checksum flags will be enabled, in order to avoid the overhead of checksumming for local communication
where data corruption is unlikely. If transmit checksum generation is disabled, then validation should also be disabled in order to avoid
packets being dropped due to invalid checksums.
DIAGNOSTICS
lo%d: can't handle af%d. The interface was handed a message with addresses formatted in an unsuitable address family; the packet was
dropped.
SEE ALSO
inet(4), intro(4)
HISTORY
The lo device appeared in 4.2BSD. The current checksum generation and validation avoidance policy appeared in FreeBSD 8.0.
BSD
March 15, 2009 BSD