Sponsored Content
Full Discussion: Subnetting
Special Forums IP Networking Subnetting Post 302993549 by Scrutinizer on Saturday 11th of March 2017 03:36:20 AM
Old 03-11-2017
Say you have a class C network of 192.168.1.0/24 which has 254 usable host addresses, because 192.168.1.0 and 192.168.1.255 are not usable (2^8-2).

By changing the CIDR suffix to 25 , you create two networks:
Code:
192.168.1.0/25

and
Code:
192.168.1.128/25

The first has 126 usable host addresses (192.168.1.{1..126}, 2^7-2)
The second has 126 usable host addresses (192.168.1.{129..254}), 2^7-2)


--
The subnet mask of the /24 network is 255.255.255.0
The subnet mask of the two /25 networks is 255.255.255.128
This User Gave Thanks to Scrutinizer For This Post:
 

3 More Discussions You Might Find Interesting

1. IP Networking

Subnetting

We have subnetted our Internal Network. We used an I.P. range of 172.16.16.0-254, 172.16.17.0-254, 172.16.18.0-254, 172.16.19.0-254 and mask 255.255.252.0. We created a subnet range of 172.16.10.0-254 and maske 255.255.255.0. Our routers are configure to route to approprate network. We are able... (2 Replies)
Discussion started by: cassy
2 Replies

2. IP Networking

Subnetting in 11 steps

As seen on Digg.com, here is my ip addressing article in full... Original Subnetting in 11 Steps article Subnetting in 11 Steps There are a few things that you will need to know first. I personally use 11 rules that I learned from Mike Vana. Below you will find the 11 rules as well as... (1 Reply)
Discussion started by: jking2100
1 Replies

3. IP Networking

Subnetting

Guys, Anyone could help me understand subnetting. I know a bit in networking but there are things that I don't get them easily. Thank You in advance. (1 Reply)
Discussion started by: etcpasswd
1 Replies
oidentd_masq.conf(5)						File Formats Manual					      oidentd_masq.conf(5)

NAME
oidentd_masq.conf - oidentd IP masquerading/NAT configuration file. DESCRIPTION
If you are using IP masquerading or NAT, oidentd can optionally return a username for connections from other machines. Support for this is specified by calling oidentd with the -m (or --masq) flag and by creating an /etc/oidentd_masq.conf file. oidentd can also forward requests for an IP masqueraded connection to the machine from which connection originates by way of the -f option. This will only work if the host to which the connection is forwarded is running oidentd with the -P (proxy) flag, or if the host's ident daemon will return a valid reply regardless of the input supplied by and the address of the host requesting the info (some ident daemons for windows do this, maybe others). FORMAT
<IP Address|Hostname>[/<Mask>] <Ident Response> <System Type> The first field contains the IP address or the hostname of a machine that IP masquerades through the machine on which oidentd runs. The mask parameter can be either a network mask or a mask in CIDR notation. A mask of 24 is equivalent to 255.255.255.0, a mask of 16 is equivalent to 255.255.0.0, etc. The second field specifies the reply that oidentd will return for lookups to the host matching the IP address specified in the first param- eter. The third field specifies the operating system the machine matching the first parameter is running. EXAMPLES
<Host>[/<Mask>] <Ident Response> <System Type> 192.168.1.1 someone UNIX 192.168.1.2 noone WINDOWS 192.168.1.1/32 user1 UNIX 192.168.1.0/24 user3 UNIX 192.168.0.0/16 user4 UNIX somehost user5 UNIX 192.168.1.0/255.255.255.0 user6 UNIX AUTHOR
Ryan McCabe <ryan@numb.org> http://dev.ojnk.net SEE ALSO
oidentd(8) oidentd.conf(5) version 2.0.8 13 Jul 2003 oidentd_masq.conf(5)
All times are GMT -4. The time now is 03:26 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy