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  • get all ip address from subnet mask

    - by Guntis
    I have this IP list shown below. How i can calculate all ip addresses from that in Linux? Is there some tools that can calculate that for me ? I need that to check if i have not banned some cloudflare IP's. As firewall i am using shorewall and i am banning with fail2ban single IP. As i know, then i cannot detect subent mask from IP adress, right? 204.93.240.0/24 204.93.177.0/24 199.27.128.0/21 173.245.48.0/20 103.22.200.0/22 141.101.64.0/18 108.162.192.0/18 190.93.240.0/20 188.114.96.0/20

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  • Why just splitting an Ethernet cable does not work?

    - by Sin Jeong-hun
    I thought the Ethernet is logically one-line communication bus (for argument's sake, I am excluding hubs). All machines attached in the bus hears the same signals and the machines themselves try to avoid collisions by randomly backing off. http://computer.howstuffworks.com/ethernet6.htm If so, why splitting one Ethernet line from my home router into two and connecting two computers would not work? Why do I have to add a switch to it? *What the Internet said would not work. [4 port home router] ------[one Ethernet cable]-----[simple splitter]======[two computers] *What the Internet said I should do [4 port home router] ------[one Ethernet cable]-----[switch]======[two computers] Is this because of the signal degradation (reduced electric current)? Thank you for all the answers! The reason why I did not just use the two ports of my home router is... The 4-port gigabit router is in my room and I had put a computer in another room (also my room, though). Since wired network is far more reliable and secure, I had bought a long Ethernet cable and and connected the computer to the router. Now I was thinking about adding another computer to that room. I could buy another long Ethernet cable, but then there will be two cables between the rooms. The one line already is a minor annoyance, so I thought if I could share the one line between the two computers in that room. A switch would work, but it requires power and is a little bit pricey. That is why I wondered why it would not work to simply split the physical Ethernet cable. Apparently I do not completely understand how Ethernet and a switch work. I just have some bit of knowledge I heard in my college class.

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  • Are neighbors formed in EIGRP and OSPF always directly connectly?

    - by xczzhh
    I always thought that neighbors formed in EIGRP were not necessarily directly connected because the only requirement for two routers to be neighbors is that they share the same Autonomous System and K-values, but it seems that I was wrong. I have looked up several books, they do not seem to give a clear answer. And I am even more confused with OSPF... Please, give me some light here. Thank you.

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  • How to use a D-Link usb network adapter on debian

    - by Barranka
    I have a Debian (squeeze) desktop, and I need to use a D-Link 150 USB Wireless Network Adapter. So far I've done this: $ lsusb ... Bus 001 Device 006: ID 2001:3c18 D-Link Corp. ... After looking for a solution in google, I found that I needed to install the following package: firmware-ralink_0.28+squeeze1_all.deb I've installed it, but Debian doesn't want to find the adapter. When I run lsmod, I can't find what I'm supposed to find: rt2870sta Can you point me in the right direction?

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  • Tomcat and HTTPS connect timeout (local Proxy resolves it)

    - by smas
    I have web application on the Tomcat with webservices. I've noticed that all web services connected to https get timeout. I run this app on my localhost in my company. When I redirect all my connections through Fiddler (local proxy) everything works correctly. I don't want to execute fiddler all the time. my computer -> [FIDDLER local proxy] -> [remote proxy] // WORKS my computer -> [remote proxy] // timeout How to increase tomcat logging to get more technical logs than only "timeout". Is there any other way to get more information what blocks the https URL?

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  • What is the network address (x.x.x.0) used for?

    - by Shtééf
    It appears to be common practice to not use the first address in a subnet, that is the IP 192.168.0.0/24, or a more exotic example would be 172.20.20.64/29. The ipcalc tool I frequently use follows the same practice: $ ipcalc -n -b 172.20.20.64/29 Address: 172.20.20.64 Netmask: 255.255.255.248 = 29 Wildcard: 0.0.0.7 => Network: 172.20.20.64/29 HostMin: 172.20.20.65 HostMax: 172.20.20.70 Broadcast: 172.20.20.71 Hosts/Net: 6 Class B, Private Internet But why is that HostMin is not simply 64 in this case? The 64 address is a valid address, right? And whatever the answer, does the same apply to IPv6? Perhaps slightly related: it also appears possible to use a TCP port 0 and an UDP port 0. Are these valid or used anywhere?

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  • Public Wi-Fi and software updates

    - by coding4fun
    According to Microsoft, "Never update your software on a public Internet connection." So I have some questions. 1. What if a public Wi-Fi hotspot is the only Internet available, ever? Never update anything? 2. What happens if Windows or some other program is set to update automatically and attempts to do so while you are using a public Wi-Fi? Disable all automatic updates on all software? 3. Will VPN help to secure software updates? If so, how to go about it? Thanks.

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  • Dealing with employees that use Hotspots? [closed]

    - by javasocute
    Recently a consultant revealed to me and my superiors that a particular department in my company had a tremendous decline in productivity over the past year. This department happened to mostly work with laptops and tablets and thus had wireless. Our barracuda did not display any vast amounts of internet entertainment and so I was initially puzzled by his statement. However he explained that more and more employees are using "hotspots" that when not broadcasted, become invisible to our network. So basically these people could connect to hotspots and watch youtube all day and we would never know it. The consultant also said that this was becoming an issue for many companies. So my question is, how can I detect invisible hotspots? I was browsing google and there are several different programs that can scan for such access points. But I am hoping to get a recommendation from the serverfault community. Thank you.

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  • How can I restrict my mates to stop downloading?

    - by user239295
    We are sharing an internet broadband connection with 6 users at a place we live. We get 20 gb fup ( Fair usage policy) with 2 mbps speed from the ISP after the 20 gb is consumed the speed comes down to 512 kbps very difficult to browse any page. The problem is we cannot track which user/mate is downloading and ending the FUP. it is very difficult to track so is there something that we can allot per user some amount of space like 2 gb of downloading or restrict all from downloading so that we can utilize all the fup till the end of the month. We are using this connection as wifi configured. A adsl router is configured as wifi and we all using all 6 laptops. No PC. Any help would be appreciated. I apologize if i am not clear with my question.

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  • Extend university wifi network

    - by asfasdoiuh ouhouhouh
    i live in a university campus and i can get wifi signal on the outside of my window but not in the house. The solution i use at the moment is a usb wifi dongle outside connected to my laptop but the lack of an internal antenna make the connection quite unreliable at times. So i was trying to find another solution to improve the reception of my network. One idea is to setup a router on the outside (in a place with stronger signal) and redirect the connection inside the house with an ethernet cable but the problem is that our Uni Wifi is managed by a capitve portal (BlueSocket with DNS redirection to login page) and the authentication has to happen on the mac address that connect to the net (so the client appliance in this case). If I use a router with Mac-Clone capability i will be able to be redirected trough the captive portal on my laptop computer and login from there or i need to setup my router to fill in the login page by itself? There are other hardware/software solutions i can use to get what i want?

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  • Making an outside machine visible to private network

    - by William
    Hi, I'm trying to make a server visible to a every computer on a separate network without doing anything to the server but I'm not sure what would be the best way to do this. I really just need to access one folder but my attempting at NFS mounting failed since I can't NFS mount a mounted folder. Any advice? Thanks.

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  • No access to Windows 2003 admin shares

    - by ARomo
    This is the environment: Several Win 2003 SP 2 servers and several Win XP SP2 & SP3 clients. All in the same LAN. Firewall is disabled everywhere. No recent Windows updates or configuration changes. This is the problem: Since last Thursday, I log on to any other server or workstation as any regular (non-admin) user and I fail to be able to open ADMIN SHARES ONLY (namely \\server1\c$, \\server1\e$ and \\server1\admin$). The error message is: "\server1\c$ is not accessible. You might not have permission to use this network resource. Contact the administrator of this server to find out if you have access permissions. Multiple connections to a server or shared resource by the same user, using more than one user name, are not allowed. Disconnect all previous connections to the server or shared resource and try again." I can, however, open the same shares if I use FQDN or IP address: \\server1.domain.local\c$ \\172.0.0.1\c$ Other shares do not have this issue and I can open them without any issue. Any ideas or suggestion would be truly appreciated. Thank you in advance.

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  • Sharing a printer on Windows home network

    - by Jeff
    I have a home network, and I'm trying to share a printer connected to one of the PCs. The wireless modem through which the internet comes through doesn't reach the entire house, so we have another router set up as well. The modem is 192.168.1.1 (let's call this A) and the router is set up as 192.168.1.100 (let's call this B). Subnet masks 255.255.255.0. The printer is hooked up to a PC on B. If my laptop is connected wirelessly to B, it can see the printer. However, if it's connected to A, it doesn't show up in My Network Places. How can I get it so that I can print to the printer regardless of whether the

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  • Sharing a printer on Windows home network

    - by Jeff
    I have a home network, and I'm trying to share a printer connected to one of the PCs. The wireless modem through which the internet comes through doesn't reach the entire house, so we have another router set up as well. The modem is 192.168.1.1 (let's call this A) and the router is set up as 192.168.1.100 (let's call this B). Subnet masks 255.255.255.0. The printer is hooked up to a PC on B. If my laptop is connected wirelessly to B, it can see the printer. However, if it's connected to A, it doesn't show up in My Network Places. How can I get it so that I can print to the printer regardless of whether the

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  • How to connect to internet 2 or more pcs with an usb wifi adapter

    - by bhaoahd
    In one pc I have an USB Wifi adapter (Realtek RTL8187L Chipset), from there a 10 meters cable to an outdoor antenna. With that I connect to a public Access Point. Now I want to be able to connect more computers to internet using that same connection that comes from the outdoor antenna, what options do I have to do this? I do have another usb wifi adapter with a small omni antenna, and a router encore ENHWI-G/A. This router can be used as a Wifi AP, but it needs a modem that works with the RJ45 connector. Is there a way I could take internet from the outdoor antenna, and create another AP indoor using that router to "repeat" that wifi that comes from the outdoor antenna? If creating this second AP is not possible, should I use some sort of local network between computers, connect my main PC with the outdoor antenna, and share the connection through the lan? (I would really prefer to have a second AP indoor so I can connect other devices like a Palm, but I am not sure how could this be possible with this router and the usb wifi adapter)

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  • Losing WLAN connections but maintaining internet connections on WIndows 7 Workgroup

    - by Di
    I have 4 computers all running Windows 7 networked in a Work group through Billion 7404vgp-m wireless router. All drivers and firmware for wireless adapters and router are up to date. Windows Firewall and Defender disabled. Disconnected ipv6. Running Nod 32 anti virus software. All have own static IP address 192.XXX.X.XXX. When I Reset the router all computers have Internet and LAN access for about 1 hour and then they will lose the LAN connection but maintain Internet connection. Resetting wireless adapters or restarting computers does nothing to fix this but resetting router will. What is causing this? How do I fix it?

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  • Can't access to access to my web server inside a network with Firewall on

    - by ianenri
    I set up a Web server with the following: There is the Internet Router, configured to Port Foward port 80 to my computer assigned to my PC's IP: 192.168.1.128 My PC is connected to that wireless router from wlan0 Then, my PC is also connected to my device (which is the webserver) with a crossover-cable usign eth0 having this anohter IP: 10.42.43.1 Finally, my device (the webserver) is connected with eth0 with this IP: 10.42.43.55 As you can see, I need to install a reverse-proxy to be able to resolve to my device's webserver. I installed pound (proxy server) in my PC and configured properly to make 192.168.1.128 resolve to 10.42.43.55 So, I just typing my ISP provided IP 200.x.x.x resolves to my device webserver. But there's a problem: I HAD TO STOP MY FIREWALL. I don't know how I need exactly configure the firewall in SUSE YAST2, or at least iptables. Stopping it is not an option, not for security reasons, just because there's port fowarding rule that is needed to give Internet access to my device too. I'm using openSUSE 12.1

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  • If the WiFi switched on, should it disable the ethernet? [closed]

    - by Peter Stuart
    My friend having problems with her laptop and I am trying to help her via SMS. She can't get her laptop connected to the internet via the Ethernet connection and there is no WiFi in the area. Could it be because her WiFi is switch on, she is using an acer aspire. If she manually switches it off could that allow the ethernet connecttion to work? Or is it a missing driver? The cable works fine as her someone else tried it. Thanks Peter

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  • Subnet address in apache access log

    - by m0ntassar
    I was inspecting my apache access logs(I use default combined log format) and I came a cross a wired entry 69.171.247.0 - - [22/Oct/2012:18:15:20 +0200] "GET /some site resources HTTP/1.1" 404 514 "-" "facebookexternalhit/1.0 (+http://www.facebook.com/externalhit_uatext.php)" As u see, this query come from a facebook robot that extract objects from site when somebody post a link. What I find weird is the logged ip address : 69.171.247.0 Does anybody know how is that possible ?

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  • How can a Virtualbox host connect to a guest VM when host wireless is disabled / host Ethernet cable is unplugged?

    - by uloBasEI
    I have a Virtualbox VM running on a computer connected to Internet via an Ethernet cable. The guest has a network adapter attached to a NAT. 2 ports (22 and 80) are forwarded so that the host can access them respectively on localhost:2222 and localhost:8080. When the Ethernet cable is plugged, both machine (host and guest) can access Internet and the host can access the SSH server/Webserver which ports are forwarded. When I unplug the Ethernet cable from the host, the host can not access the SSH server/Webserver of the guest anymore. Same situation with a Laptop connected to Internet via wireless when I disable the wireless adapter or set a wrong WPA key. My question is: is there a workaround for the host to access the guest services even if its Ethernet cable is unplugged / wireless is not available?

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  • connecting to a network using route command

    - by ami
    I have a computer with an external IP(192.168.223.220) and also an internal address (10.1.1.20) in order to connect to some servers that don't have external addresses only 10.1.1.xx . in order to connect to these servers from other machines I used the following command "route ADD 10.1.1.0 MASK 255.255.255.0 192.168.223.220" and than I was able to connect to the servers using there 10.1.1.xx address. The problem is that the hard disk of main server(192.168.223.220) died and was replaced and after the that I am not able to connect to the servers as before, the route command succeeds and I can ping 10.1.1.20 but not the other servers. Thanks I am using Windows XP and the print outs are D:\AurosHome\Scriptsipconfig /all Windows IP Configuration Host Name . . . . . . . . . . . . : N100-master Primary Dns Suffix . . . . . . . : Node Type . . . . . . . . . . . . : Unknown IP Routing Enabled. . . . . . . . : No WINS Proxy Enabled. . . . . . . . : No Ethernet adapter Local Area Connection 3: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Intel(R) PRO/1000 EB Network Connection with I/O Acceleration #2 Physical Address. . . . . . . . . : 00-30-48-34-BA-B9 Dhcp Enabled. . . . . . . . . . . : No IP Address. . . . . . . . . . . . : 192.168.225.180 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : 192.168.225.254 DNS Servers . . . . . . . . . . . : 192.168.225.2 Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Intel(R) PRO/1000 EB Network Connection with I/O Acceleration Physical Address. . . . . . . . . : 00-30-48-34-BA-B8 Dhcp Enabled. . . . . . . . . . . : No IP Address. . . . . . . . . . . . : 10.1.1.20 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : Ethernet adapter Local Area Connection 2: Media State . . . . . . . . . . . : Media disconnected Description . . . . . . . . . . . : Mellanox IPoIB Adapter Physical Address. . . . . . . . . : 00-02-C9-25-34-0D D:\AurosHome\Scriptsroute print Interface List 0x1 ........................... MS TCP Loopback interface 0x2 ...00 30 48 34 ba b9 ...... Intel(R) PRO/1000 EB Network Connection with I/O Acceleration #2 - Packet Sche duler Miniport 0x3 ...00 30 48 34 ba b8 ...... Intel(R) PRO/1000 EB Network Connection with I/O Acceleration - Packet Schedul er Miniport 0x10005 ...00 02 c9 25 34 0d ...... Mellanox IPoIB Adapter - Packet Scheduler Miniport =========================================================================== Active Routes: Network Destination Netmask Gateway Interface Metric 0.0.0.0 0.0.0.0 192.168.225.254 192.168.225.180 10 10.1.1.0 255.255.255.0 10.1.1.20 10.1.1.20 10 10.1.1.20 255.255.255.255 127.0.0.1 127.0.0.1 10 10.255.255.255 255.255.255.255 10.1.1.20 10.1.1.20 10 127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1 192.168.225.0 255.255.255.0 192.168.225.180 192.168.225.180 10 192.168.225.180 255.255.255.255 127.0.0.1 127.0.0.1 10 192.168.225.255 255.255.255.255 192.168.225.180 192.168.225.180 10 224.0.0.0 240.0.0.0 10.1.1.20 10.1.1.20 10 224.0.0.0 240.0.0.0 192.168.225.180 192.168.225.180 10 255.255.255.255 255.255.255.255 10.1.1.20 10.1.1.20 1 255.255.255.255 255.255.255.255 10.1.1.20 10005 1 255.255.255.255 255.255.255.255 192.168.225.180 192.168.225.180 1 Default Gateway: 192.168.225.254 Persistent Routes: None

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  • Ways to setup a ZFS pool on a device without possibility to create/manage partitions?

    - by Karl Richter
    I have a NAS where I don't have a possibility to create and manage partitions (maybe I could with some hacks that I don't want to make). What ways to setup multiple ZFS pools with one partition each (for starters - just want to use deduplication) exist? The setup should work with the NAS, i.e. over network (I'd mount the images via NFS or cifs). My ideas and associated issues so far: sparse files mounted over loop device (specifying sparse file directly as ZFS vdev doesn't work, see Can I choose a sparse file as vdev for a zfs pool?): problem that the name/number of the assigned loop device is anything but constant, not sure how increasing the number loop device with kernel parameter affects performance (there has to be a reason to limit it to 8 in the default value, right?)

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  • Unable to ping between subnets and out to internet

    - by battlemidget
    My setup is Modem - Linksys router - Laptop with 2 devices (wlan0/eth0) - desktop machine Router is 192.168.1.1 gateway to the internet Laptop wlan0 is 192.168.1.4 with a gw of 192.168.1.1 Laptop eth0 is 192.168.2.254 which acts as a second gateway desktop is 192.168.2.100 On laptop i've setup ip_forward to 1, and have inserted 2 iptables rules -A FORWARD -i eth0 -o wlan0 -j ACCEPT -A FORWARD -i wlan0 -o eth0 -j ACCEPT The laptop can ping outside the network (i,e, yahoo.com) it can not ping 192.168.2.100. The desktop can ping 192.168.2.254 but nothing outside the network or 192.168.1.0 subnet. On laptop ip route show lists: 192.168.2.0/24 dev eth0 proto kernel scope link src 192.168.2.254 192.168.1.0/24 dev wlan0 proto kernel scope link src 192.168.1.4 127.0.0.0/8 dev lo scope link default via 192.168.1.1 dev wlan0 What am I missing to make my desktop go through the laptop in order to access the router which provides access to the internet? Thanks

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  • Could not use domain name instead of static IP

    - by Nam Gi VU
    Hi, I'm working with some partners in the UK. My office is in Vietnam. We are having a network problem: My partner can access an internal website using the domain name, e.g. http://website.name, but I can only access that website using the direct IP, e.g. 192.168.1.85. I can not ping that web server using "ping website.name" but it works if I using "ping 192.168.1.85". I want to use the domain name. Please help.

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