You should leave all entries for the DHCP IP out of the hosts file unless you can statically assign an IP/hostname to the same host by MAC address. To find out what IP is attached to an interface, use:
The output will look something like this:
Ignore the lo interface with the 127.0.0.1 IP, look at the other.
Hi to all,
A real virgin to unix, so sorry for such a basic question.
Have a older unix terminal with crashed server. Software resides to terminal. Don't have network printing capabilities. I removed network printer and gone local, but don't know how to redirect the device for local... (3 Replies)
Dear Guys ,
Please again , i could not find a solution for my server linux red hat 9 .
when i leave it about more than 5 min ideal it goes to something like sleep mode and all services stop and even TCP/IP .. what shall i do ???
another thing please , when i installed the server , i gave... (3 Replies)
Hi all,
i am copying .gz files from production server to development server using
"scp" command.my requirement is after copying .gz files i want to delete old
.gz files(two days back) in development server from production server.
like this way i need to delelte .log ,.z and .dmp files... (3 Replies)
Hello. I am really new to Unix and am trying to set up a local printer on a FreeBSD 6.2 machine. I was able to get some kind of garbage by going lptest > /dev/lpt0, but after I set up the spooler I get nothing but page after page of nothing. I checked the kernel configuration and it had the correct... (1 Reply)
I do a ssh to remote host(A1) from local host(L1). I then ssh to another remote(A2) from A1.
When I do a who -m from A2, I see the "connected from" as "A1".
=> who -m
userid pts/2 2010-03-27 08:47 (A1)
I want to identify who is the local host who initiated the connection to... (3 Replies)
Hello everyone,
I have question how i can setup local ipv6 network ? Here is my network:
I have main ipv6 gw and server X for example that is connected with my main ipv6 gw and all ping6, traceroute6 is working. My local network is connected to one switch and main ipv4 gateway is that server X... (2 Replies)
Hi All,
I am trying setup a remote printer on a solaris 10 server. The printer is online and working fine is solaris 8. I have added the pritner to /etc/hosts file and /etc/printers.conf ... I need to know followings:
1. How do I find the default pritner port on the old solaris machine... (0 Replies)
Hello,
Greetings!!
I have a server with 3 TB of disk space and 12 GB RAM and a i7 processor.
What I did thus far is to install Oracle Enterprise Linux (OEL 5.7)as the host system and install Oracle Virtual box and created 3 VM's. Installed OEL 5.7 on one of the VM, working on installing... (1 Reply)
Hello guys,
I would like to develop a script which takes a host name as argument and displays a message whether the host is on the local network or not. How can I accomplish that? Is there a file or command that I can use to list all host on the local network? :confused: (4 Replies)
Discussion started by: Learn4Life
4 Replies
LEARN ABOUT FREEBSD
gre
GRE(4) BSD Kernel Interfaces Manual GRE(4)NAME
gre -- encapsulating network device
SYNOPSIS
To compile the driver into the kernel, place the following line in the kernel configuration file:
device gre
Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):
if_gre_load="YES"
DESCRIPTION
The gre network interface pseudo device encapsulates datagrams into IP. These encapsulated datagrams are routed to a destination host, where
they are decapsulated and further routed to their final destination. The ``tunnel'' appears to the inner datagrams as one hop.
gre interfaces are dynamically created and destroyed with the ifconfig(8) create and destroy subcommands.
This driver corresponds to RFC 2784. Encapsulated datagrams are prepended an outer datagram and a GRE header. The GRE header specifies the
type of the encapsulated datagram and thus allows for tunneling other protocols than IP. GRE mode is also the default tunnel mode on Cisco
routers. gre also supports Cisco WCCP protocol, both version 1 and version 2.
The gre interfaces support a number of additional parameters to the ifconfig(8):
grekey Set the GRE key used for outgoing packets. A value of 0 disables the key option.
enable_csum Enables checksum calculation for outgoing packets.
enable_seq Enables use of sequence number field in the GRE header for outgoing packets.
EXAMPLES
192.168.1.* --- Router A -------tunnel-------- Router B --- 192.168.2.*
/
/
+------ the Internet ------+
Assuming router A has the (external) IP address A and the internal address 192.168.1.1, while router B has external address B and internal
address 192.168.2.1, the following commands will configure the tunnel:
On router A:
ifconfig greN create
ifconfig greN inet 192.168.1.1 192.168.2.1
ifconfig greN inet tunnel A B
route add -net 192.168.2 -netmask 255.255.255.0 192.168.2.1
On router B:
ifconfig greN create
ifconfig greN inet 192.168.2.1 192.168.1.1
ifconfig greN inet tunnel B A
route add -net 192.168.1 -netmask 255.255.255.0 192.168.1.1
NOTES
The MTU of gre interfaces is set to 1476 by default, to match the value used by Cisco routers. This may not be an optimal value, depending
on the link between the two tunnel endpoints. It can be adjusted via ifconfig(8).
For correct operation, the gre device needs a route to the decapsulating host that does not run over the tunnel, as this would be a loop.
The kernel must be set to forward datagrams by setting the net.inet.ip.forwarding sysctl(8) variable to non-zero.
SEE ALSO gif(4), inet(4), ip(4), me(4), netintro(4), protocols(5), ifconfig(8), sysctl(8)
A description of GRE encapsulation can be found in RFC 2784 and RFC 2890.
AUTHORS
Andrey V. Elsukov <ae@FreeBSD.org>
Heiko W.Rupp <hwr@pilhuhn.de>
BUGS
The current implementation uses the key only for outgoing packets. Incoming packets with a different key or without a key will be treated as
if they would belong to this interface.
The sequence number field also used only for outgoing packets.
BSD November 7, 2014 BSD