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• Why from a virtualized Ubuntu system I can't discover the ip address of my router?

  - by AndreaNobili

  I am not into computer network and I have the following problem finding my router IP address. I have a Windows 8 PC on on which it is installed VmWare Workstation that virtualizes Linux Ubuntu. The network adapter settings of this Virtual Machine is setted as NAT. Now my problem is that if in the Windows 8 DOS shell I perform the ifconfig statment I obtain C:\Users\Andrea>ipconfig Configurazione IP di Windows Scheda Ethernet tap0: Stato supporto. . . . . . . . . . . . : Supporto disconnesso Suffisso DNS specifico per connessione: techub.lan Scheda Ethernet Connessione di rete Bluetooth: Stato supporto. . . . . . . . . . . . : Supporto disconnesso Suffisso DNS specifico per connessione: Scheda LAN wireless Connessione alla rete locale (LAN)* 11: Stato supporto. . . . . . . . . . . . : Supporto disconnesso Suffisso DNS specifico per connessione: Scheda LAN wireless Wi-Fi: Suffisso DNS specifico per connessione: DSL2750B Indirizzo IPv6 locale rispetto al collegamento . : fe80::89ff:6d12:49cf:4354%13 Indirizzo IPv4. . . . . . . . . . . . : 192.168.1.3 Subnet mask . . . . . . . . . . . . . : 255.255.255.0 Gateway predefinito . . . . . . . . . : 192.168.1.1 Scheda Ethernet Ethernet: Stato supporto. . . . . . . . . . . . : Supporto disconnesso Suffisso DNS specifico per connessione: Scheda Ethernet VMware Network Adapter VMnet1: Suffisso DNS specifico per connessione: Indirizzo IPv6 locale rispetto al collegamento . : fe80::edb3:8352:f954:2b0c%23 Indirizzo IPv4. . . . . . . . . . . . : 192.168.129.1 Subnet mask . . . . . . . . . . . . . : 255.255.255.0 Gateway predefinito . . . . . . . . . : Scheda Ethernet VMware Network Adapter VMnet8: Suffisso DNS specifico per connessione: Indirizzo IPv6 locale rispetto al collegamento . : fe80::d00b:8c6e:98b:f1ec%24 Indirizzo IPv4. . . . . . . . . . . . : 192.168.15.1 Subnet mask . . . . . . . . . . . . . : 255.255.255.0 Gateway predefinito . . . . . . . . . : Scheda Tunnel Teredo Tunneling Pseudo-Interface: Stato supporto. . . . . . . . . . . . : Supporto disconnesso Suffisso DNS specifico per connessione: Scheda Tunnel isatap.techub.lan: Stato supporto. . . . . . . . . . . . : Supporto disconnesso Suffisso DNS specifico per connessione: techub.lan Scheda Tunnel isatap.{5B95051D-79AB-4147-92CF-3A2E16698432}: Stato supporto. . . . . . . . . . . . : Supporto disconnesso Suffisso DNS specifico per connessione: Scheda Tunnel isatap.{340A5FAD-1597-402E-B658-29C37E8F7BC2}: Stato supporto. . . . . . . . . . . . : Supporto disconnesso Suffisso DNS specifico per connessione: Scheda Tunnel isatap.DSL2750B: Suffisso DNS specifico per connessione: DSL2750B Indirizzo IPv6 locale rispetto al collegamento . : fe80::5efe:192.168.1.3%26 Gateway predefinito . . . . . . . . . : So, looking at the previous output it appear clear that the default gateway (my router) is: 192.168.1.1, infact if I open it into a browser it apear to me the login mask to enter in the router settings.... Ok, if now I open the virtualized Ubuntu shell and perform the route command I obtain this output: andrea@andrea-virtual-machine:~$ route Tabella di routing IP del kernel Destination Gateway Genmask Flags Metric Ref Use Iface default 192.168.15.2 0.0.0.0 UG 0 0 0 eth0 link-local * 255.255.0.0 U 1000 0 0 eth0 192.168.15.0 * 255.255.255.0 U 1 0 0 eth0 So, here it say to me that the default gateway is 192.168.15.2 (that is not my router ip address), why? My idea is that it could depend by the NAT. Because my Windows system is connected using the wireless but in the virtualized Ubuntu I see that I am connected to a "wired network". So I think that the NAT virtualize a network adapter (or something like this) and that 192.168.15.2 could be the ip address of this network adapter... But it seems strange to me because, as you can see in the previous ipconfig output the VmWare network adapter addresses are: 192.168.129.1 and 192.168.15.1. So I have also 2 others doubts: 1) What device represents the 192.168.15.2 ip address that the virtualized Ubuntu see as Default gateway but that is not my router? 2) What exactly do the two VmWare network adapter that I have configured into my Windows 8 system? There is a way to discover my router ip from the virtualized Ubuntu system ? Tnx Andrea

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• OS X can't copy files from Windows Home Server...over wifi.

  - by John Clayton

  I'm a brand spanking new user of OS X, coming from a lifetime of Windows use. I've been setting up my new Macbook Pro and have run into a very unusual problem. Over wifi, I am unable to copy files to or from my Windows Home Server. The problem seems to exist only over wifi, and only to WHS. Here are the details of my setup: 2010 Macbook Pro (Core i7), OS X 10.6.3 Windows Home Server PP3 (virtualized in XenServer 5.5) Windows 7 Ultimate x64 desktop Windows 7 Ultimate x64 in Boot Camp D-Link DIR-655 wireless N router Here is what I've done to narrow down the problem: Files copy fine from WHS to OS X when using gigabit ethernet Files copy fine from desktop to OS X when using gigabit ethernet Files fail to copy from WHS to OS X when using wifi (error -51) Files copy fine from desktop to OS X when using wifi Files copy fine from WHS to Boot Camp when using wifi Files copy fine from desktop to Boot Camp when using wifi From what I can tell, it seems to be some sort of issue between OS X and WHS, but I can't for the life of me see what would be different between shares on WHS and my desktop. They are both connected using smb://ADDRESS (I've tried both by IP and name). I can browse the shares on the WHS, but copying to OS X fails. I originally found the issue while installing VS2010 off an ISO from WHS, mounted to a Windows 7 VM using VMware Fusion. During the installation the VM was unusable - even the clock got behind the host be about 8 minutes. Once I plugged in the ethernet and disabled the wifi things picked up and finished quickly. The Fusion 3.1 RC is the only I think of that I installed that may have messed with the wifi driver. I've also tried resetting the wifi router, and have changed it from being G & N to N-only. Under Boot Camp I get similar speeds as my wife's N laptop. Any ideas? Thanks!

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• DHCP Server on local machine

  - by EralpB

  Hello I am trying to setup a dhcp3-server on Ubuntu. But my question is more generic, if dhcp server is in a blockbox and all clients are connected to it I think I get what is going on but when dhcp server is installed on one of the "clients" that confuses me. When I send a dhcp packet from that client to the dhcp server, will my ethernet card read and write at the same time? Or will it handle it internally without writing any data to ethernet cable. It's the first time I am encountering these network things so I am a little bit confused. Also I wonder If I am in a big network with lan IP let's say 192.168.0.100 and I install a dhcp server to my computer, can any other computers accidentally get IP from my dhcp server? Every computer has one ethernet card (if that matters?). And every computer is connected to one router. I guess the answer is no because the broadcast message won't reach to my computer since when router receives a dhcp search packet it will answer and it won't let other computers know about it because they don't need to. And without router sending that packet one by one, it cannot travel further. I'd be glad if someone enlightens me. Thank you very much.

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• Vyatta masquerade out bridge interface

  - by miquella

  We have set up a Vyatta Core 6.1 gateway on our network with three interfaces: eth0 - 1.1.1.1 - public gateway/router IP (to public upstream router) eth1 - 2.2.2.1/24 - public subnet (connected to a second firewall 2.2.2.2) eth2 - 10.10.0.1/24 - private subnet Our ISP provided the 1.1.1.1 address for us to use as our gateway. The 2.2.2.1 address is so the other firewall (2.2.2.2) can communicate to this gateway which then routes the traffic out through the eth0 interface. Here is our current configuration: interfaces { bridge br100 { address 2.2.2.1/24 } ethernet eth0 { address 1.1.1.1/30 vif 100 { bridge-group { bridge br100 } } } ethernet eth1 { bridge-group { bridge br100 } } ethernet eth2 { address 10.10.0.1/24 } loopback lo { } } service { nat { rule 100 { outbound-interface eth0 source { address 10.10.0.1/24 } type masquerade } } } With this configuration, it routes everything, but the source address after masquerading is 1.1.1.1, which is correct, because that's the interface it's bound to. But because of some of our requirements here, we need it to source from the 2.2.2.1 address instead (what's the point of paying for a class C public subnet if the only address we can send from is our gateway!?). I've tried binding to br100 instead of eth0, but it doesn't seem to route anything if I do that. I imagine I'm just missing something simple. Any thoughts?

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• Separate computers in my apartment can't communicate to each other?

  - by Razor Storm

  In my apartment, the management provides the building with a network connection. I have my computer plugged into the ethernet coming out of the walls, and my friend who also lives in the apartment building has his computer connected to a separate ethernet jack. As far as I know our two computers are not within a LAN, and ipconfig shows that we only have external ip addresses. The problem, then, appears when we attempt make direct communication between our computers. I have some hosting server set up on my machine, and my friend is unable to connect to it via my ip address. Other people who do not live in the apartment can connect fine. Ethernet adapter Local Area Connection: IPv4 Address. . . . . . . . . . . : 204.29.113.41 Subnet Mask . . . . . . . . . . . : 255.255.254.0 Default Gateway . . . . . . . . . : 204.29.112.1 His ip: 204.29.113.104 Using a fulltunnel vpn doesn't help.

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• How to use Python to read the physical address(MAC ID) [closed]

  - by getjoefree

  I want to read the physical address of the NIC model, i can get the results that i want to with SED.EXE before, but SED.EXE does not support my environment but Python ok, who have the means to do it. The general situation (not plug the network cable, it is impossible to obtain IP address): Ethernet adapter: Connection-specific DNS Suffix.: Chianet Description ...........: Marvell Yukon 88E8040 PCI-E Fast Ethernet Controller Physical Address .........: A4-BA-DB-9D-1E-8E Dhcp Enabled ...........: Yes Autoconfiguration Enabled ....: Yes Ethernet adapter 3: Media State . . . . . . . . . . . : Media disconnected Description . . . . . . . . . . . : Dell Wireless 1510 Wireless-N WLAN Mini-Card Physical Address. . . . . . . . . : 00-23-4D-D9-C0-28 The description of the NIC different, we can use this to fetch the corresponding physical address, base on Physical Address does not work, because the computer with the WLAN Card, I want to use Python to read my computer the card information and after Python handles an output file, output file format: SET MAC = A4BADB9D1E8E and sed format: ipconfig -all|sed -nrf getmac.sed | sed -e "s/-//g" > WINMAC.BAT getmac.sed: /Marvell Yukon 88E8040/ { n; s/.*: ([-0-9A-F]+)/set winmac=\1/p; }

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• Sharing files between 2 different routers

  - by Chris

  I realize this has been asked before and I have read as much as I could find on the topic but I still need help with this because there are so many different approaches and the ones I am trying aren't working. So I have 2 routers, lets call them A and B. Both have a wireless feature and are active. A is in the basement and receives the internet. There is a TV on the ground floor that is connected to A through an ethernet wire. B is upstairs and gets the internet from A through an ethernet wire. Connected to B, is a desktop running Plex Media Server. What I want to do is make sure devices connected to both routes can access the Plex Media Server. So what I have read is that I should plug in the ethernet wire connecting B to a into a LAN port instead of the WAN port. After that I should turn off DHCP. I have tried this and B stops receiving internet. What am I doing wrong? Another thing I have read is to use Router B in bridge mode but Router B is running openwrt and I have QoS on it so gaming/VoIP/browsing is unaffected by heavy downloading/uploading. I would prefer to keep this active. I realize it might be ineffective if a device in Router A is doing some hardcore downloading but all that stuff is done on Router B anyway so it doesn't matter. Router A can't get openwrt because it is a shitty one provided by Bell. So, how do I proceed with this?

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• ifcf-ethx problem

  - by Shahmir Javaid

  Every time i run service networkd restart This is what i get Shutting down interface eth0: Device state: 3 (disconnected) [ OK ] Shutting down interface eth1: [ OK ] Shutting down loopback interface: Error org.freedesktop.NetworkManagerSettings.InvalidConnection: ifcfg file '/etc/sysconfig/network-scripts/ifcfg-lo' unknown Error org.freedesktop.NetworkManagerSettings.InvalidConnection: ifcfg file '/etc/sysconfig/network-scripts/ifcfg-lo' unknown Error org.freedesktop.NetworkManagerSettings.InvalidConnection: ifcfg file '/etc/sysconfig/network-scripts/ifcfg-lo' unknown Error org.freedesktop.NetworkManagerSettings.InvalidConnection: ifcfg file '/etc/sysconfig/network-scripts/ifcfg-lo' unknown [ OK ] Bringing up loopback interface: Error org.freedesktop.NetworkManagerSettings.InvalidConnection: ifcfg file '/etc/sysconfig/network-scripts/ifcfg-lo' unknown Error org.freedesktop.NetworkManagerSettings.InvalidConnection: ifcfg file '/etc/sysconfig/network-scripts/ifcfg-lo' unknown Error org.freedesktop.NetworkManagerSettings.InvalidConnection: ifcfg file '/etc/sysconfig/network-scripts/ifcfg-lo' unknown Error org.freedesktop.NetworkManagerSettings.InvalidConnection: ifcfg file '/etc/sysconfig/network-scripts/ifcfg-lo' unknown [ OK ] Bringing up interface eth0: ** (process:12951): WARNING **: fetch_connections_done: error fetching user connections: (2) The name org.freedesktop.NetworkManagerUserSettings was not provided by any .service files. Active connection state: activating Active connection path: /org/freedesktop/NetworkManager/ActiveConnection/1 state: activated Connection activated [ OK ] Here is my ifcfg-eth0 # Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller DEVICE=eth0 BOOTPROTO=dhcp DEFROUTE=yes DHCPCLASS= HWADDR=xxx IPV4_FAILURE_FATAL=yes IPV6INIT=no ONBOOT=yes OPTIONS=layer2=1 PEERDNS=yes PEERROUTES=yes TYPE=Ethernet UUID=xxx And my ifcfg-eth1 # Intel Corporation 82541PI Gigabit Ethernet Controller DEVICE=eth1 HWADDR=xxx ONBOOT=no And my ifcfg-lo DEVICE=lo IPADDR=127.0.0.1 NETMASK=255.0.0.0 NETWORK=127.0.0.0 # If you're having problems with gated making 127.0.0.0/8 a martian, # you can change this to something else (255.255.255.255, for example) BROADCAST=127.255.255.255 ONBOOT=yes NAME=loopback Any ideas?

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• Is Gmail Being Blocked by my ISP (wait till you read this)?

  - by James

  This is the strangest thing I have ever encountered. I have a desktop on which I cannot access Gmail and also youtube sign in (I believe since youtube is owned by google they both use the same sign in system). So okay, maybe my ISP is blocking these for some reason or maybe my firewall is, or maybe there is something wrong with my connectivity, right? NO. On other computers that uses the same connection via a wireless router I can access both gmail and youtube sign in just fine. On this computer which doesn't have a wireless card and so I have to connect via Ethernet cable (connected to a USB converter since the Ethernet port doesn't work anymore) I can access all sites and services including things like aol and hotmail. But only when it comes to gmail, do I get complete and utter throttling. I even turned off my AV ad Firewall momentarily and no luck. The gmail ages starts to load and by mid point it just stays there loading and loading and loading... never ends. I tried everything, I reset the modem and router multiple times. I reinstalled my operating system from a vista to a windows 7 hoping a complete reinstall would solve the issue, but no luck. So can anyone for the life of them figure out why this could be? And yes, I am going to call my ISP but not to solve this issue, but to cancel them. I want to upgrade to cabel from DSL anyway. I didn't mention my ISP because I'm not sure if that is within the rules (if it's okay some one let me know and I will). P.S. All this happened one day, before gmail was perfectly accessible in this computer. I can't remember anything special that happened on that day prior to this. The only thing I can think of is, my ISP or Google itself is blocking this computer based on it's mac address, but I don't know if that's even done. Additional info: PC: Windows 7 Ultimate 32 bit Connection Type: DSL Connecting Medium: Ethernet cable via USB converter

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• Application (was Firefox) crash on first load on Ubuntu Linux on older Dell Laptop

  - by Ira Baxter

  I've had a Dell Latitude laptop since about 2000 without managing to destroy it. A month ago the Windows 2000 system on it did something stupid to its file system and Windows was completely lost. No point in reinstalling Windows 2000, so I installed an Ubuntu Linux on the laptop. Everything seems normal (installed, rebooted, I can log in, run GnuChess, poke about). ... but ... when I attempt to launch Firefox from the top bar menu icon, I get a bunch of disk activity, the whirling cursor icon goes round a bit and then (WAS: everything stops: icon, mouse. Literally nothing happens for 5 minutes. Ubuntu is dead, as far as I can tell. EDIT : on further investigation, spinning icon, mouse operated by touchpad freeze. There's apparantly a little disk activity occuring about every 5 seconds. I wait 5-10 minutes, behavior doesn't change) A reboot, and I can repeat this reliably. So on the face of it, everything works but Firefox. That seems really strange. The only odd thing about this system when Firefox is booting is that while it has an Ethernet port (that worked fine under Windows), it isn't actually plugged into an Ethernet. As this is the first Firefox boot since the Ubuntu install, maybe Firefox mishandles Internet access? Why would that crash Ubuntu? (I need to go try the obvious experiment of plugging it in). EDIT: I tried to run the Disk manager tool, not that I cared what it was, just a menu-available application. It started up like Firefox, I get a little tag in the lower left saying Disk P*** something had started, and then the same behavior as Firefox. At this point, I don't think its the Ethernet. Is it possible that the Ubuntu disk driver can't handle the disk controller in this older laptop? The install seemed to go fine.

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• Fedora 15: em1 recently dissapeared and hostapd no longer serves internet to wirelessly connected devices

  - by Daniel K

  I have a laptop running hostapd, phpd, and mysql. This laptop uses an Ethernet connection to connect to the internet and acts as a wireless access point for my workplace's wifi devices. After installing some software and reconnecting my Ethernet elsewhere, my "em1" device is no longer present and wirelessly connected devices can no longer reach the internet. The software I recently installed is: pptp, pptpd, and updated some fedora libraries. I have also recently moved my desk and laptop to another location and thus had to reconnect the Ethernet elsewhere. Wifi devices no longer have access to the internet. Wirelessly connected devices are able to successfully log into the laptop, showing full strength, correct SSID, and uses the proper password. However, when I tried to connect to a site like google, the request times out. The device "em1" also no longer appears on my machine. Running: # ifup em1 will give me the following output: ERROR : [/etc/sysconfig/network-scripts/ifup-eth] Device em1 does not seem to be present, delaying initialization. And running: # dhclient em1 has the following output: Cannot find device "em1" When I run # dmesg|grep renamed, I get the following: renamed network interface eth0 to p4p1. I've tried to connect to the internet through p4p1 directly from the laptop and was successful. However, my wireless devices connected to my laptop are not able to connect to the internet. I have uninstalled pptp and pptpd using # yum erase ... but the problem still persists. To install pptp I used: # yum install pptp To install pptpd I did the following: # rpm -Uvh http://poptop.sourceforge.net/yum/stable/fc15/pptp-release-current.noarch.rpm # yum install pptpd To update my fedora libraries I used: # yum check-update # yum update EDIT: Running # route produces the following results: Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface default 10.11.200.1 0.0.0.0 UG 0 0 0 p4p1 10.11.200.0 * 255.255.252.0 U 0 0 0 p4p1 172.16.100.0 * 255.255.255.0 U 0 0 0 wlan0

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• Can I share my cable internet connection through my ADSL wireless router?

  - by Roaders

  Hi All Over the xmas period I am at my in-laws. They have Virgin Broadband (cable) and have a basic modem / router that is plugged directly into their computer using an ethernet cable. My wife and I arrived with 5 PCs! (ok, one is a gift and won't be used) 4 of which are laptops so I would like to be able to use their internet connection. At the moment I am working so have plugged the ethernet cable into my work laptop. Rebooting the router meant that my work laptop now has internet. I have my ADSL Netgear router which is wireless. I tried plugging it in between the router and the PC but I didn't seem to be able to share the internet connection wirelessly. The original PC still had internet despite ony being connected to my router but my wireless laptop didn't have a connection. My old cable router had an internet ethernet port on the back that the modem plugged into. My ADSL router doesn't, it has a phone connection socket. Is there a way of doing what I want with the equipment I have? Thanks

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• Forward all traffic from one IP to another Ip on OS X

  - by Josh

  This is related to this question I just asked... I have two IP address on my iMac I want to "bridge". I'm not sure what the proper terminology is... here's the situation. My iMac has a firewire connection to my laptop and an ethernet connection to the rest of my office. My laptop has an ip of 192.168.100.2 (on the firewire interface). My iMac has an IP of 192.168.100.1 on the firewire interface, and two IPs, 10.1.0.6 and 10.1.0.7, on it's ethernet interface. If I wanted to forward all traffic coming in from 192.168.100.2 on my OS X machine to go out on IP 10.1.0.7, and vice-versa, can this be done? I assume I would use the ipfw command. Essentially I want to "bridge" the firewire network to the ethernet network so my laptop can see all the machines on the 10.1 network, and all those machines can see my laptop at 10.1.0.7. Is this possible?

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• Slow tracepath on local LAN

  - by Simone Falcini

  I am on EXSi and I have 2 instances: Ubuntu and CentOS. These are the network configurations Ubuntu eth0 Link encap:Ethernet HWaddr 00:50:56:00:1f:68 inet addr:212.83.153.71 Bcast:212.83.153.71 Mask:255.255.255.255 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:76059 errors:0 dropped:26 overruns:0 frame:0 TX packets:7224 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:6482760 (6.4 MB) TX bytes:2080684 (2.0 MB) eth1 Link encap:Ethernet HWaddr 00:0c:29:46:5a:f2 inet addr:192.168.1.1 Bcast:192.168.1.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:252 errors:0 dropped:0 overruns:0 frame:0 TX packets:608 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:42460 (42.4 KB) TX bytes:82474 (82.4 KB) /etc/iptables.conf *nat :PREROUTING ACCEPT [142:12571] :INPUT ACCEPT [5:1076] :OUTPUT ACCEPT [8:496] :POSTROUTING ACCEPT [8:496] -A POSTROUTING -s 192.168.1.0/24 -o eth0 -j MASQUERADE COMMIT *filter :INPUT ACCEPT [2:72] :FORWARD ACCEPT [4:336] :OUTPUT ACCEPT [6:328] -A INPUT -i eth1 -p tcp -j ACCEPT -A INPUT -i eth1 -p udp -j ACCEPT -A INPUT -i eth0 -p tcp --dport ssh -j ACCEPT COMMIT CentOS eth0 Link encap:Ethernet HWaddr 00:0C:29:74:1C:55 inet addr:192.168.1.2 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::20c:29ff:fe74:1c55/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:499 errors:0 dropped:0 overruns:0 frame:0 TX packets:475 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:68326 (66.7 KiB) TX bytes:82641 (80.7 KiB) The main problem is that if i execute this command from the CentOS instance ssh 192.168.1.2 it takes more than 20s to connect. It seems like it's routing the connection to the wrong network. What could it be? Thanks!

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• Vyatta masquerade out bridge interface

  - by miquella

  We have set up a Vyatta Core 6.1 gateway on our network with three interfaces: eth0 - 1.1.1.1 - public gateway/router IP (to public upstream router) eth1 - 2.2.2.1/24 - public subnet (connected to a second firewall 2.2.2.2) eth2 - 10.10.0.1/24 - private subnet Our ISP provided the 1.1.1.1 address for us to use as our gateway. The 2.2.2.1 address is so the other firewall (2.2.2.2) can communicate to this gateway which then routes the traffic out through the eth0 interface. Here is our current configuration: interfaces { bridge br100 { address 2.2.2.1/24 } ethernet eth0 { address 1.1.1.1/30 vif 100 { bridge-group { bridge br100 } } } ethernet eth1 { bridge-group { bridge br100 } } ethernet eth2 { address 10.10.0.1/24 } loopback lo { } } service { nat { rule 100 { outbound-interface eth0 source { address 10.10.0.1/24 } type masquerade } } } With this configuration, it routes everything, but the source address after masquerading is 1.1.1.1, which is correct, because that's the interface it's bound to. But because of some of our requirements here, we need it to source from the 2.2.2.1 address instead (what's the point of paying for a class C public subnet if the only address we can send from is our gateway!?). I've tried binding to br100 instead of eth0, but it doesn't seem to route anything if I do that. I imagine I'm just missing something simple. Any thoughts?

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• How to set static ip address on vmware for NAT guest vms from an ubuntu Host dhcp server?

  - by javadba

  I need to configure various linux flavor NAT'ed guest vm's to have static ip addresses provided by the Ubuntu host. The vmware documentation punts on this topic, deferring to "see the man pages for your linux distribution". But the generic pages for "my linux distro" do not know about the special stuff for vmware e.g. vmnet8. Pointers from someone who just knows how to do this would be much appreciated. Here is the /etc/vmware/vmnet8/dhcpd/dhcpd.conf: allow unknown-clients; default-lease-time 1800; # default is 30 minutes max-lease-time 7200; # default is 2 hours subnet 192.168.238.0 netmask 255.255.255.0 { range 192.168.238.128 192.168.238.254; option broadcast-address 192.168.238.255; option domain-name-servers 192.168.238.2; option domain-name localdomain; default-lease-time 1800; # default is 30 minutes max-lease-time 7200; # default is 2 hours option netbios-name-servers 192.168.238.2; option routers 192.168.238.2; } host vmnet8 { hardware ethernet 00:50:56:C0:00:08; fixed-address 192.168.238.1; option domain-name-servers 0.0.0.0; option domain-name ""; option routers 0.0.0.0; } Fromt the dhcpd.conf documentation, we are supposed to add an entry for static hosts similar to the following: host mystatichostonee { hardware ethernet 00:20:6B:C7:9B:E4; fixed-address 192.168.238.101; } host mystatichosttwo { hardware ethernet 00:23:7a:C7:9c:F2; fixed-address 192.168.238.102; } But notice that the vmnet8 entry in the vmware-generated dhcpd.conf already is set to fixed-address. I don't know how to add the specifics for my hosts to that vmnet8 entry: do they become nested?

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• bond0:0 + define virtual IP

  - by yael

  hi all in my linux server I have the follwoing: Linux Version - RedHat-Linux- 5.3.0.0 (this linux server only only one LAN) more /etc/sysconfig/network-scripts/ifcfg-bond0:0 DEVICE=bond0:0 ONBOOT=yes BOOTPROTO=static IPADDR=10.10.10.12 NETMASK=255.255.255.0 ifconfig -a bond0 Link encap:Ethernet HWaddr 00:00:00:00:00:00 UP BROADCAST MASTER MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) bond0:0 Link encap:Ethernet HWaddr 00:00:00:00:00:00 inet addr:10.10.10.12 Bcast:1.1.1.255 Mask:255.255.255.0 UP BROADCAST MASTER MULTICAST MTU:1500 Metric:1 eth0 Link encap:Ethernet HWaddr 00:0E:0C:C7:F8:92 inet addr:1.1.1.1 Bcast:1.1.1.255 Mask:255.255.255.0 inet6 addr: fe80::20e:cff:fec7:f892/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:8600 errors:0 dropped:0 overruns:0 frame:0 TX packets:4764 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:717979 (701.1 KiB) TX bytes:598620 (584.5 KiB) Memory:b8820000-b8840000 my problems: why I get HWaddr 00:00:00:00:00:00 and not the real MAC address I cant ping to other server with 10.10.10.11 from my server is it posible to define bond0:0 when I have only one LAN (eth0) other info: more /etc/modprobe.conf alias eth0 e1000e alias eth1 e1000e alias eth2 e1000e alias eth3 e1000e alias scsi_hostadapter mptbase alias scsi_hostadapter1 mptsas alias scsi_hostadapter2 ata_piix alias bond0 bonding alias bond1 bonding

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• bond0:0 + define virtual IP

  - by yael

  hi all in my linux server I have the follwoing: Linux Version - RedHat-Linux- 5.3.0.0 (this linux server only only one LAN) more /etc/sysconfig/network-scripts/ifcfg-bond0:0 DEVICE=bond0:0 ONBOOT=yes BOOTPROTO=static IPADDR=10.10.10.12 NETMASK=255.255.255.0 ifconfig -a bond0 Link encap:Ethernet HWaddr 00:00:00:00:00:00 UP BROADCAST MASTER MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) bond0:0 Link encap:Ethernet HWaddr 00:00:00:00:00:00 inet addr:10.10.10.12 Bcast:1.1.1.255 Mask:255.255.255.0 UP BROADCAST MASTER MULTICAST MTU:1500 Metric:1 eth0 Link encap:Ethernet HWaddr 00:0E:0C:C7:F8:92 inet addr:1.1.1.1 Bcast:1.1.1.255 Mask:255.255.255.0 inet6 addr: fe80::20e:cff:fec7:f892/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:8600 errors:0 dropped:0 overruns:0 frame:0 TX packets:4764 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:717979 (701.1 KiB) TX bytes:598620 (584.5 KiB) Memory:b8820000-b8840000 my problems: why I get HWaddr 00:00:00:00:00:00 and not the real MAC address I cant ping to other server with 10.10.10.11 from my server is it posible to define bond0:0 when I have only one LAN (eth0) other info: more /etc/modprobe.conf alias eth0 e1000e alias eth1 e1000e alias eth2 e1000e alias eth3 e1000e alias scsi_hostadapter mptbase alias scsi_hostadapter1 mptsas alias scsi_hostadapter2 ata_piix alias bond0 bonding alias bond1 bonding

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• SSH Connection Error : No route to host

  - by dewbot

  There are three machines in this scenario: Desktop A : [email protected] Laptop A : [email protected] Machine B : [email protected] All the machines have Ubuntu 11.04 (Desktop A is a 64bit one) and have both openssh-server and openssh-client. Now when I try to connect Desktop A to Laptop A or vice-versa by ssh [email protected] I get an error as port 22: No route to host in both the cases. I own both the machines, now if I try same commands from my friend's machine, i.e. via Desktop B, I can access both my Laptop and Desktop. But if I try to access Desktop B from my Laptop or by Desktop I get port 22: Connection timed out I even tried changing ssh port no. in ssh_config file but no success. Note: that 'Laptop A' uses WiFi connection while 'Machine A' uses Ethernet Connection and 'Machine B' is on an entirely different network. Laptop A && Desktop A - Router/Nano_Rcvr provided to me by ISP. So to one Router two Machines are connected and can be accessed at the same time. here is my ifconfig output for both the machines :- Laptop wlan0 Link encap:Ethernet HWaddr X:X:X:X:00:bc inet addr:1.23.73.111 Bcast:1.23.95.255 Mask:255.255.224.0 inet6 addr: fe80::219:e3ff:fe04:bc/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:108409 errors:0 dropped:0 overruns:0 frame:0 TX packets:82523 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:44974080 (44.9 MB) TX bytes:22973031 (22.9 MB) Desktop eth0 Link encap:Ethernet HWaddr X:X:X:X:c5:78 inet addr:1.23.68.209 Bcast:1.23.95.255 Mask:255.255.224.0 inet6 addr: fe80::227:eff:fe04:c578/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:10380 errors:0 dropped:0 overruns:0 frame:0 TX packets:4509 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:1790366 (1.7 MB) TX bytes:852877 (852.8 KB) Interrupt:43 Base address:0x2000

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• How to connect computers to a network printer behind a router?

  - by kokbira

  General question: How to connect computers to an IP printer behind a router? Particular question: How to connect C-1 and C-2 to PRI? What? Where? [ISP] | | -> IPs:200.X.X.X/other configs:DC | [R-1] | | -> IPs:10.1.X.X locked by MAC,M:255.0.0.0,G:10.1.0.1 |¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯| | | [PRI] IP:10.1.7.7 [R-2] IP: 10.1.0.1,MAC:A | | -> IPs:192.168.1.X,M:255.255.255.0,G:192.168.1.1 |¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯| | | [C-1] IP:192.168.1.2 [C-2] IP:192.168.1.3,MAC:A Glossary and details: ------------------------------------------------------------------------------------ - IP: IP. - IPs: Some IP range. - M: Mask. - G: Gateway. - MAC:A: A MAC address that I will not inform you :) - DC: Don't care. - ISP: Internet Service Provider (not so much details about it on that case). - R-1: A real router or some concatenated so IP range bellow that block is 10.1.X.X and above is ISP. The provided IPs are provided by MAC. As all available addresses are in use, you must clone an existing one to join with a new device (and to disconnect the cloned one). - PRI: An network printer (some people here call that IP printer). - R-2: A TP-LINK TL-WR340G, mine wireless router (since my computer does not have ethernet input, it is my ethernet-wifi adapter :), admin access, MAC address cloned from C-2 (MAC:A). I've to configure 10.0.1.1 and 10.0.1.2 as DNS addresses, other wise I cannot connect C-1 and C-2 to Internet. - C-1: My computer, a CCE XLE-425 (remember: no ethernet input), with Windows 7, admin access. - C-2: another computer with better configs than mine, MAC:A, Windows XP. Requirements: I want to print, to access Internet and to do it myself (no need to call network admin men in black people). Pay attention to MAC clones and DNS info.

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• Virtual box host-only adapter configuration

  - by Xoundboy

  I have VirtualBox 4 running on Win 7 with a Centos 6 guest VM set up for hosting my dev server. When I'm connected to my home network the guest can be accessed via a static IP address that I configured (192.168.56.2), but not when I'm in the office. I'm guessing that the DHCP server in the office doesn't have a gateway configured for the 192.168.56.x IP range. I read something about the VB host-only adapter that should allow me to set this guest VM up in such a way that I don't need to be on any network to be able to access the guest from the host using a static IP. I've not been able to find out exactly how to configure this though. Can anyone give me an example configuration, thanks. UPDATE: Thanks for your responses. I've now set up a single virtual network adapter in VirtualBox and set it to host-only: C:\Users\Ben>vboxmanage list hostonlyifs Name: VirtualBox Host-Only Ethernet Adapter GUID: d419ef62-3c46-4525-ad2d-be506c90459a Dhcp: Disabled IPAddress: 192.168.56.2 NetworkMask: 255.255.255.0 IPV6Address: fe80:0000:0000:0000:78e3:b200:5af3:2a57 IPV6NetworkMaskPrefixLength: 64 HardwareAddress: 08:00:27:00:94:e8 MediumType: Ethernet Status: Up VBoxNetworkName: HostInterfaceNetworking-VirtualBox Host-Only Ethernet Adapter On the guest I've set up eth0 to use the same IP address as the host-only adapter (192.168.56.2) but when I try to log in using Putty I still get "Network Error : connection refused". VirtualBox DHCP servier is enabled but I can't ping the gateway (192.168.56.1) from either host nor guest. There's no firewall running on either OS. What next?

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• Libvirt/KVM in NAT: can't access from host (and can't forward)

  - by SharkWipf

  I'm trying to set up a port forward to a KVM guest, managed through Libvirt on Debian 6. The VM is running in NAT, through the "default" network. This all runs fine, the VM has full internet connection. However, the host cannot reach the vm internally. Neither ping, nc nor nmap on the NAT network give any signs of the VM. Due to this, the normal iptables forwarding rules don't work either. $ cat /etc/debian_version 6.0.5 $ libvirtd --version libvirtd (libvirt) 0.9.11.3 $ kvm --version QEMU emulator version 1.0 (qemu-kvm-1.0+dfsg-11, Debian), Copyright (c) 2003-2008 Fabrice Bellard ifconfig: eth0 Link encap:Ethernet HWaddr 54:04:a6:f1:6f:10 inet addr:x.x.x.x Bcast:x.x.x.x Mask:255.255.255.x inet6 addr: fe80::5604:a6ff:fef1:6f10/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:118902 errors:0 dropped:0 overruns:0 frame:0 TX packets:142357 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:13247173 (12.6 MiB) TX bytes:95163190 (90.7 MiB) Interrupt:28 Base address:0xe000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:230646 errors:0 dropped:0 overruns:0 frame:0 TX packets:230646 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:204577107 (195.0 MiB) TX bytes:204577107 (195.0 MiB) virbr0 Link encap:Ethernet HWaddr fe:54:00:e2:d2:60 inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:5050 errors:0 dropped:0 overruns:0 frame:0 TX packets:961 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:666759 (651.1 KiB) TX bytes:400701 (391.3 KiB) vnet0 Link encap:Ethernet HWaddr fe:54:00:e2:d2:60 inet6 addr: fe80::fc54:ff:fee2:d260/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:5050 errors:0 dropped:0 overruns:0 frame:0 TX packets:125687 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:500 RX bytes:739803 (722.4 KiB) TX bytes:6886609 (6.5 MiB)

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• bond0:0 + define virtual IP

  - by yael

  in my Linux server I have the following: Linux Version - RedHat-Linux- 5.3.0.0 (this Linux server only only one LAN) more /etc/sysconfig/network-scripts/ifcfg-bond0:0 DEVICE=bond0:0 ONBOOT=yes BOOTPROTO=static IPADDR=10.10.10.12 NETMASK=255.255.255.0 ifconfig -a bond0 Link encap:Ethernet HWaddr 00:00:00:00:00:00 UP BROADCAST MASTER MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) bond0:0 Link encap:Ethernet HWaddr 00:00:00:00:00:00 inet addr:10.10.10.12 Bcast:1.1.1.255 Mask:255.255.255.0 UP BROADCAST MASTER MULTICAST MTU:1500 Metric:1 eth0 Link encap:Ethernet HWaddr 00:0E:0C:C7:F8:92 inet addr:1.1.1.1 Bcast:1.1.1.255 Mask:255.255.255.0 inet6 addr: fe80::20e:cff:fec7:f892/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:8600 errors:0 dropped:0 overruns:0 frame:0 TX packets:4764 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:717979 (701.1 KiB) TX bytes:598620 (584.5 KiB) Memory:b8820000-b8840000 my problems: why I get HWaddr 00:00:00:00:00:00 and not the real MAC address I cant ping to other server with 10.10.10.11 from my server is it possible to define bond0:0 when I have only one LAN (eth0) other info: more /etc/modprobe.conf alias eth0 e1000e alias eth1 e1000e alias eth2 e1000e alias eth3 e1000e alias scsi_hostadapter mptbase alias scsi_hostadapter1 mptsas alias scsi_hostadapter2 ata_piix alias bond0 bonding alias bond1 bonding

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• Router intermittently failing

  - by nomen

  My old Asus router died a few weeks ago, so I thought I'd set up my Debian box to deal with routing my home network. I have a few complications, but I adapted my configuration from a previously working configuration, and I don't see why I am having intermittent problems. But I am having them! Every so often, my SSH connections to the router (and to the Xen virtual machines hosted by the router) just drop. I am unable to use the router's dns server. I can't ping the router. Etc. All of these things work most of the time, but break down intermittently, for a few minutes at a time. (I can provide more details, but I'm not sure what will be helpful) /etc/network/interfaces: # The loopback network interface auto lo iface lo inet loopback # Gigabit ethernet, internal network auto eth0 allow-hotplug eth0 iface eth0 inet manual # USB ethernet, internet auto eth1 allow-hotplug eth1 iface eth1 inet dhcp # Xen Bridge auto xlan0 iface xlan0 inet static bridge_ports eth0 address 10.47.94.1 netmask 255.255.255.0 As I understand it, this is sufficient to create the network interfaces, and even do some switching between Xen hosts and my eth0 interface. I installed and configured Shorewall to manage routing between the bridge and my internet-facing interface: /etc/shorewall/zones fw firewall net ipv4 lan ipv4 /etc/shorewall/interfaces net eth1 detect dhcp,tcpflags,nosmurfs,routefilter,logmartians lan xlan0 detect dhcp,tcpflags,nosmurfs,routefilter,logmartians,routeback,bridge /etc/shorewall/policy net all DROP info fw net ACCEPT info all all REJECT info /etc/shorewall/rules DNS(ACCEPT) fw net DNS(ACCEPT) lan fw Ping(ACCEPT) lan fw ... and so on, these all work, when the router is accepting traffic at all. /etc/shorewall/masq eth1 10.47.94.0/24 Also, the router is currently "working", and I checked on a problematic client: arp infrastructure infrastructure.mydomain (10.47.94.1) at 0:23:54:bb:7d:ce on en0 ifscope [ethernet] I tried it when the router was down, and I (eventually) got the same response. It took about 30 seconds to return, though.

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• Centos VM serving multiple public IP: how to configure network interface?

  - by Glasnhost

  I have a Centos 5.6 VM (Vsphere client) already responding to two different public IPs on eth0 and eth0:1 and I'm trying to add eth0:2. I copied the eth0 config file and restarted the network service. I don't understand which other steps are needed... ifconfig eth0 Link encap:Ethernet HWaddr 00:40:46:B9:00:41 inet addr:10.1.12.10 Bcast:10.1.12.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:163371837 errors:77 dropped:0 overruns:0 frame:0 TX packets:168210961 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:1891221045 (1.7 GiB) TX bytes:855899500 (816.2 MiB) Interrupt:59 Base address:0x2000 eth0:1 Link encap:Ethernet HWaddr 00:40:46:B9:00:41 inet addr:10.1.12.11 Bcast:10.1.12.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Interrupt:59 Base address:0x2000 eth0:2 Link encap:Ethernet HWaddr 00:40:46:B9:00:41 inet addr:10.1.12.12 Bcast:10.1.12.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Interrupt:59 Base address:0x2000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:188976973 errors:0 dropped:0 overruns:0 frame:0 TX packets:188976973 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:2015642664 (1.8 GiB) TX bytes:2015642664 (1.8 GiB) more /etc/resolv.conf nameserver 10.1.12.1 route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.1.12.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0 0.0.0.0 10.1.12.1 0.0.0.0 UG 0 0 0 eth0

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