Networking :: Find Unused IP Address In Subnet?
Jul 25, 2011I need to find myselfe unused IP address in some subnet.
How to determine that particular IP is ununsed in that subnet without asking network admin ?
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Fedora Networking :: Find The IP-ADRESS Of A Machine Using The MAC-ADDRESS Within A Subnet?
May 20, 2009Is there any tool or command where I can track down the IP-ADDRESS of a machine within the subnet using its MAC-ADDRESS .
View 11 Replies View RelatedNetworking :: ARP Does Not Resolve MAC Address Of Hosts On The Same Subnet?
Jul 26, 2011I just changed my CentOS server from DHCP to static IP address. After the change, I cannot ping other hosts on the same subnet. (I can ping the CentOS itself).The IP address of CentOS is 192.168.0.202.After pinging 192.168.0.106 (106 is on and other host can ping it), arp -a shows? (192.168.0.106) at <incomplete> on eth0 It looks ARP cannot resolve MAC address of hosts 192.168.0.106.
View 1 Replies View RelatedNetworking :: VLAN With 2 Router And 2 Subnet - Is Device In Different Subnet Works
Jul 22, 2011I have TWO L3 + router switch (say switch1 and switch2). I created VLAN100 with VLAN ID 100 in both the switches. I created router 192.168.1.1/24 in Switch1. I created router 192.168.2.1/24 in Switch2. Switch1 is connected with 1.x/24 PCs. PCs are configured with 1.1 gateway. Switch2 is connected with 2.x/24 PCs. PCs are configured with 2.1 gateway. Both Switch1 and switch2 are connected by a trunk to carry VLAN100 data.
1)I have few PCs of 1.x connected to say Switch1 Is it possible for PC with IP 192.168.1.100(x) to ping PC with IP 192.168.2.100(y)?What are the configuration required in both switches to make them communicate ? All the device in both the subnets should ping/communicate with each other.
2)Move PC (192.168.1.100) to switch2. Move PC (192.168.2.100)to switch1.What will happen when PC(1.100) ping (2.100) and vice versa?What will happen when PC(say 1.80 in switch1) pings PC (say 1.100 in switch2) and vice versa? What will happen when PC(say 1.80 in switch1) pings PC (say 2.100 in switch1) and vice versa?
Networking :: Can't Browse Computer Of One Subnet From Another Subnet
Jul 4, 2011I installed Redhat Enterprise linux server5. it has two LAN card and two subnet connected to these two LAN card. i can browse network from these two network easily. But i created VLAN on one network card.Now i cant browse network from these VLAN subnet.
View 3 Replies View RelatedProgramming :: Shell Script And Administration Of A System - Change Or Set The IP Address And Subnet Mask
Aug 26, 2010tasks of an administrative level that we can use Shell Script to automate them. It's a kind of homework for me to figure out how to automate those tasks. Using PHP and Shell Script design and develop a Web Interface to change or set the IP Address and Subnet Mask of the UNIX / Linux System. The related services must be restarted automatically for the new IP Address and Subnet Mask to take effect. No user name and password should be asked for when using that Web Interface. How would you do it?
View 10 Replies View RelatedRed Hat / Fedora :: How To Find Unused Disks On RHEL
Aug 26, 2010Does any body have a script handy to detect unused disks on a Linux Server? I have a bunch of RHEL 4 and 5 Servers with a number of unused EMC disks hanging in there. I just want to make use of these disks or return these disks to the SAN Pool after confirming that they are unused.
View 2 Replies View RelatedProgramming :: Script With Will Ping A Network To Find Out Unused IP?
Jun 29, 2010Is it possible to create threads in BASH? I need a script with will ping a network to find out unused IP. in a for or while loop the pinging process is taking a very long time. I was wondering if it is possible to send multiple ping on the same time so this will speed up the scanning process.
View 5 Replies View RelatedUbuntu :: How To Find / Delete Unused Hidden Config Folders
Oct 12, 2010I recently moved to a new machine, and I copied my entire home folder across. This included lots of hidden (starting with '.') folders, and in many cases they are config folders for packages which I have not installed on the new machine. They are taking up space, so I would like to delete them, but to go through manually and figure out which ones I need would be very laborious. Is there a way to find, and perhaps delete, config folders for packages that are not installed?
View 2 Replies View RelatedFedora Networking :: Find Mac Address From IP ?
Jul 18, 2011I need to find mac address when i know the ip of one client ( for example ). How can I do this ? ( Command )
View 9 Replies View RelatedUbuntu :: Find IP Addy / Subnet Mask / Gateway?
Jan 18, 2010How do i find my internet address, subnet mask, gateway,etc in Ubuntu?
View 1 Replies View RelatedFedora Networking :: Find MAC Address Of A Networked PC?
Feb 21, 2009I want to find the MAC address of another pc connected to my pc through LAN. That PC is showing GRUB load error so i cant boot it.
Can i find its MAC address through my PC? Both PC's are connected in LAN.
Networking :: Find And Change Mac Address In Fedora 14
Jul 5, 2011How to find and change mac address ?
View 5 Replies View RelatedUbuntu Networking :: Find Out More About A MAC Address In My DHCP Clients
Mar 8, 2011I don't really have a reason for this currently. I recognize all the MAC address on my DHCP client list and keep it rather well locked down. I was just wondering if there was something I could run on the terminal to get more information on a given MAC address on my network. Something kind of like whois for websites.
View 1 Replies View RelatedNetworking :: Find The IP Address Of Connected Network Drive?
Mar 31, 2011I desire to access a WD Netcenter network drive from Ubuntu 10.10 using NFS mounts.Several on line helps show how if you know the IP address of the drive. How can I discover the IP address of the drive. My Windows network is using DHCP, though I understand that the drive uses a static address. I know the MAC address of the drive. As a user (but not an administrator), I have much Unix experience.
View 3 Replies View RelatedNetworking :: Windows Cannot Find IP Address Of Samba Server
Jan 26, 2011We are running samba on a Fedora release 8 (werewolf). The samba server is located on a dmz subnet off of my Cisco ASA 5510 firewall. From my inside network I have no problems connecting to the samba shares. However when someone uses a VPN connection they cannot connect to the samba share. VPN users are assigned an address from a pool which has no problems getting to the dmz based samba server. All ports required are open on both firewalls (Samba server and PC with VPN connection.) I consistently get an error saying Windows cannot find the ip address of the samba server. I have looked at the samba logs in varlogssamba and found a complete list of connection attempts listed by ip address. These addresses match the pool addresses that are being assigned by the firewall when someone tries to connect using the vpn.
Each entry has this:
lib/access.c:check_access(327)
connection denied from (ip address that is assigned by firewall)
smdb/process.crocess_smb(1062)
connection denied from (ip address that is assigned by firewall)
I checked the smb.conf to make sure the subnet the pool addreses is listed in the global section. It is.
CentOS 5 Networking :: Find Remote Machine Ip Address Used By JDBC
Mar 1, 2010I am accessing a remote DB using JDBC from inside a java program. is there any terminal command with which I can see the remote machine's ip/mac address?
View 1 Replies View RelatedServer :: IP Address In Ubuntu \ Dont Find Inet Address?
Aug 4, 2011If I give "ifconfig" in my laptop I get eth0,lo,wlan0.In that where do I find my Ip address in Ubuntu in 10.04. In eth0 I dont find inet address.Where can I find it?
View 2 Replies View RelatedUbuntu Networking :: Find IP Address Of Computers In LAN Served By Simple DHCPd?
Feb 8, 2011How to find IP address of computers in LAN served by simple DHCPd (in ADSL modem - without IP reservations/MAC address).
So is in Ubuntu something like on-fly name resolution in Windows ? Without running DNS server with some kind of DynDNS ?
e.g.
My comp has hostname "GoGo" but I get random IP address from DHCP.
How can other PC on same LAN resolve my changing IP address ?
Programming :: Find The Mac Address For A Given Ip Address?
Feb 16, 2010I am trying to find out the mac address of the eth0 port on linux probe. This port is controlled by kernal and hence I don't have control over it. How do I find out the mac address of this port ? Is there any system call which will take the ip address and will do the lookup on the linux's ip table to get the mac address ?
View 6 Replies View RelatedNetworking :: 2 Nics In Same Subnet?
Jan 8, 2010I have 2 x PCs and a NAS. Both PCs have 2x NICS. PC connectivity to Internet is via an ADSL router. Current config: Thus far (by choice) I've used static IPs in the 192.168.168.x range for my internal network, connecting all PCs and NAS via a jumbo frame enabled gigabit switch. This has facilitated moving data between the PCs and the NAS at high-speed. As both PCs also required Internet access from time to time, both are also connected to the ADSL router using the 2nd NIC and using subnet 192.168.1.x. I'm sure some of you are shaking your heads by now, but it works well and has been entirely hassle free.
However, I've an app running on the NAS that I'm keen to get Internet connected also. As my existing network devices are not using DHCP I figured the simplest method would be to change my ADSL router configuration such that it is in the same 192.168.168.x subnet, change its DHCP server settings to serve IPs in the same subnet (but in a restricted range I know won't cause any conflicts with the static IPs) and problem solved. On changing the ADSL router confiruration with all machines already booted up and configured as described above, everything worked. All devices could see one another, and access the Internet. On later rebooting the system this no longer works
- Internet access is fine but PCs don't see one another or the NAS. If I disconnect the ADSL Router from the PCs then all devices see one another again.
- Does having 2x NICS on a single device each assigned unique IPs in the same subnet create an issue and can it be overcome? I'd like to overcome it because making one of my PCs the gateway forces me to have it on anytime another device needs access.
- If I'm forced to use Internet connection sharing with one PC on the network connected to the router, how do I best configure this?
- One of the things I need to retain is gigabit connectivity between the PCs and PCs and the NAS (currently achieved by 192.168.168.x subnet being linked via gigabit switch).
Networking :: Access IP From Outside Subnet
Dec 26, 2010I am trying to make Apache web server, it's work but cannot be browsed outside my subnet.I am on huge LAN network, not sure how it works, know it have TL-SL2428WEB Smart Switches and probably some kind of DHCP, every user have maximum 64KB, just plug UTP cable, and I have static address on that subnet like: "my.sub.net.ip" witch I know from Java NetworkInteface class or when I try to update IP on my www.dyndns.com Dynamic DNS account with ez-ipupdate, but my subnet is connected to Web with another IP like "my.isp.provider.ip" witch I get from whatismyipaddress.com and I check that is my Cable ISP provider web IP. It is possible that there is more subnet layers between these two IP.Problem occurs when I try to access to my web site from another computer. When I set dyndns host name to be my.sub.net.ip or use localhost everything works fine from my computer, I can access my web site, Apache work, I can use ssh. To illustrate you it work like this: Go to DNS server, find my host name, get my "my.sub.net.ip" and say "This is actually my localhost IP, no need to go on Web, lets loopback". But when I try from another computer even from my college's computer on same subnet it don't succeed. When host name is set on "my.isp.provider.ip" of course nothing works.
We, users of LAN, don't have access to our LAN nor we have admin. For example sometimes we stuck without net and we cannot even press reset button on switches or something like that, we have to wait for day to they, owner of LAN, order some professional to do that. It seems they are just user of Cable TV and IP, and they bay and install LAN without any kind of admin. Also, I use Fedora 13, with httpd, ssh and others packages that comes with Fedora 13 DVD. I know to write bash scripts, use yum, very good in C++ and Java, great programmer, but newbie in networking, , a very little Perl, html, web servers, I heard for DHCP, DNS, NAT, IP forwarding. How you see it is problem in my lack of knowledge about networking. I hope that I succeed to describe by problem with enough details. Please, try to help me. I be very graceful for any kind of help. Don't afraid to bomb my head with any kind of information hard to understand.
Networking :: Gateway In Other Subnet
Jan 1, 2011I've rent a server from a Germany data center,They use a single IP as their gateway that is not in range of my servers IP,Strangly server is working well and when I use 'route -n' command the gateway which is in other subnet appears properly./etc/sysconfig/network contains no gateway IP and I don't know how they set the default gateway while after reboot the gateway is the same, also the IP is static and there's now DHCP.I need to know how they did it so I can do the same on my VPSes.
View 1 Replies View RelatedFedora Networking :: Two NIC's Can Be Bridge Together Even Though They Are The SAME Subnet?
Aug 9, 2009I have 2 NIC's in a box. One of them is external and doesn't matter for this question I don't think.
The other NIC is 192.168.100.3. It hosts an iSCSI Target and SMB Share on my LAN. It's works great.
I have another PC that has NIC at 192.168.100.101 and it hosts my DHCP (Scope: 192.168.100.5-25) server for my LAN.
I have a hardware firewall at 192.168.100.1 and it serves inet to the LAN on a different external connection.
So...
I currently have a WAP (cheap p.o.s. netgear router in WAP mode that keeps overheating). I want to eliminate the WAP device and add a WiFi NIC to the Top PC above.
So, on the first system I would have:
NIC 1: External IP and External Gateway
NIC 2: Static IP 192.168.100.3
Proposed WiFi NIC 3: Static 192.168.100.4
Question:
If I bridge NIC 2 and NIC 3 like this:
# brctl addbr br0
# brctl addif br0 eth0
# brctl addif br0 eth1
Then I simply put the WiFi in Ad Hoc, will another WiFi in Ad Hoc (for example my laptop) be able to "see" 192.168.100.101 (DHCP) & 192.168.100.1 (Gateway) (via WiFI 192.168.100.4 through the bridge to 192.168.100.3 and on to the LAN)?
Also, can the two NIC's be bridge together even though they are the SAME subnet?
Networking :: How Subnet Masking Works
Nov 15, 2010I have read NUMEROUS tutorials and explanations on the net about this, but they all seem to assume an informed understanding of IP networking. I have limited knowledge (basically I know how to set up my own home network and use the normal commands for troubleshooting.).I am doing a project at work which requires networking our new store with our original store (throughA VPN).I am just trying to understand in the most basic way how sub netting and subnet masks work. I don't believe this is necessary knowledge for setting up the network via VPN, but I would just like to understand it and I feel like I will be prepared to study further. basically:
1. How does a network mask isolate a particular host on a network?
2. How does changing the mask allow for more addresses to be used?
For example, if my address is, say, 192.168.1.36, how does 255.255.255.0 isolate my machine to receive traffic? I suppose what I am really not understanding is how it does this with more than one host on the network with the same mask.
Networking :: Cannot Ping To Machine From Another Subnet?
Apr 23, 2010I installed apache2 on my Ubuntu machine and I am trying to access the server from another subnet. The server is connected using ethernet and has a static ip address. I can ping from the server to any machine in the other subnet but non of the machine on that subnet can ping the server. iptables does not seem to be running
Code:
# service iptables status
iptables: unrecognized service
and its rules are
Code:
# iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy ACCEPT)
target prot opt source destination
[code]....
What is preventing my machine from being accessed from the other subnet?
Networking :: Can't Set Default Gateway To Different Subnet / Do That?
Feb 3, 2011This is slackware 12. I'm trying to share my internet connection (on eth0) with a computer connected to eth1.
eth0 is 192.168.0.101, eth1 is 192.168.1.100 (different subnets).
But when I try to make eth1's default gateway the same as eth0's, see the error I get code...
Networking :: Connecting To A Printer On Another Subnet
Aug 19, 2010I have some trouble setting up a printer on my network. My network is divided so that all wired connections are in one subnet, while all wireless devices are in another. My printer is Canon MP640 and is connected via wireless. When I use the network printer scanner utility from Canon, it will only scan my wired subnet, and is thus unable to see the printer. I can ping the printer, so there is no problem with subnet segregation.
On my router, I have Debian and iptables. My initial thought was that I could somehow set iptables to just forward all packets to an address to my printer. This address, of course, wouldn't exist "physically". But I have no idea whether or not this is the right approach. A suggestion I received from a colleague was to set up forwarding of broadcast packets. However, I am unsure whether this will have an impact on the wired subnet. If any of you could conjure a magical iptables rule for this or have suggestions other than plugging the printer into the wired net
Networking :: Default Gateway On Different Subnet?
Jan 8, 2010I am in a big confusion and searching an answer to calm down my mind.I have my eth0 has following configuration
` ` `
IP 192.168.1.100
mask 255.255.255.0
[code]....
Networking :: Forward Reverse Dns Subnet?
Mar 25, 2010I have the zone record 0.16.271.in-addr.arpa which is working fine.
The NS for that zone is setup for my own name server.
I however would like to forward requests for 172.16.0.224/28 to another name server. How would I do this?