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• How to use aliases for remote hosts when accessing locally

  - by alexloh

  I would like to use an alias for a remote host. For example, when instead of "ping giraffe.foo.bar.com" I want to do "ping giraffe", but only when I do it from my own machine. I am able to do this for raw IP addresses by adding an entry in /etc/hosts (ie "123.456.1.0 giraffe"), but it does not seem to work for host names.

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• Automator script to do a whois lookup

  - by Snow Crash

  I'd like to take an IP address from my Terminal, right click, select Services Whois and get the results back somehow. This doesn't exist so I'm wanting to create a simple Automator script to do that. But, I'm running into a few problems. This is what I've done - Automator Actions: Get Specified Text xxx.xxx.xxx.xxx Run Shell Script for x in "$@"; do whois $x; done View Results But all I get in View Results is this: ( "" ) Any suggestions?

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• xampp - can access control panel, cannot access projects/sites on local network

  - by Peter O.

  I've configured xampp and firewall so I can access desktop pc's localhost over my local network through desktop pc's IP. But I'm not able to access auctual projects: I can access: http://192.168.x.x/xampp or http://192.168.x.x/phpMyAdmin But I cannot access: http://192.168.x.x/myWebsite/ I get an error: Server error We're sorry! The server encountered an internal error and was unable to complete your request. Please try again later. error 500

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• Determine the percentage of a file that has been ftp'd from client to server

  - by klwillie

  I want to ftp a large file from a Windows client to a Windows server, using their IP addresses. This is on an internet independent network. While the file is transferring, I would like to determine how many bytes have been received by the server. I then would like to use this information to determine in real-time the percentage of the file that has been transferred to the server. Any recommendations as to the ftp command syntax and C# code to achieve this?

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• ESXi settings lost following reboot

  - by Araz

  Hi All, I have freshly installed ESXI 4. But when ever i reboot my server all the setting gets lost like IP setting move back to automatic instead of static, the license key gets lost. Any ideas?

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• Windows Filtering Platform not turning off until admin logon. Win2008R2sp1

  - by rjt

  Just installed Windows Server 2008R2 SP1 to see if it would fix this problem, but it didn't. Until an administrator logs onto the domain controller, there are many events that WFP blocked a connection from Server60 to Server60 or Server60 to Server70. Both server60 and server70 are the domain controllers. One the admin logs on, the WFP events stop. The firewall is off by default GPO. Yes, i know that the WFP kicks in during the boot up sequence until the firewall takes over or in my case does not take over (since Vista), but i clearly should not have to autologon to a domain controller and call autolock or something. Example event LEVEL = Information Source = Microsoft Windows Security Auditing EventID = 5152 "Filtering Platform Packet Drop" and its evil twin id = 5157 "Filtering Platform Connection" "The Windows Filtering platform has blocked a connection." Direction %%14593 SourceAddress 192.168.10.60 SourcePort 49677 DestAddress 192.168.10.60 DestPort 389 Protocol 6 FilterRTID 65667 LayerName %%14611 LayerRTID 48 RemoteUserID S-1-0-0 RemoteMachineID S-1-0-0 windows-server-2008-r2 WFP BFE WindowsFilteringPlatform BaseFilteringEngine

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• Network Block Device (NBD) clients for Windows or similar solutions

  - by przemoc

  Are there any NBD clients for Windows? Strangely, I cannot find any, or I am searching for them in a wrong way. Such client should be possibly a driver with front-end tool (may be a command-line one) allowing to create virtual drives and associate them with given hosts (or simply localhost) and ports where NBD servers are listening. From user perspective virtual drive should be close to what physical drive is, so it should be accessible as something like \\.\PhysicalDriveX (maybe \\.\VirtualDriveX?), be visible in Disk Management (diskmgmt.msc) and mountvol tools at least. (The only thing I found remotely close to NBD on Windows is ImDisk's proxy mode and companion tool devio, but AFAIK ImDisk only works at partition level (so no virtual drive) and devio uses different protocol.) Secondary question is: Are there any (preferably simple) Windows-specific solutions allowing creation of virtual drive delegating read/write request to user-space via some explicit way (like via TCP, IPC, DLL implementing given API, etc.)?

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• seamless mode remote desktop connection from linux to windows

  - by mateusz.fiolka

  I am a programmer using Linux as my main OS, however sometimes I need to use windows (ie, office, ea). I'm running qemu with kvm to access the windows "machine". I would like to achieve something that is described here: https://help.ubuntu.com/community/SeamlessVirtualization (It means I would be able to run chosen applications on Windows and then display them locally on Linux as separate windows achieving good desktop integration). However seamless rdp is buggy and doesn't work on my machine (probably because I'm using a tiling window manager and a 64bit system). Are you aware of any other solution then rdp seamless mode? I would prefer to still use quemu because it uses cpu hardware virtualization, so different protocol/client combination would be preferable.

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• How would you secure a home router with a self-signed certificate?

  - by jldugger

  littleblackbox is publishing "private keys" that are accessible on publicly available firmwares. Debian calls these "snake-oil" certs. Most of these routers are securing their HTTPS certs with these, and as I think about it, I've never seen one of these internal admin websites with certs that wasn't self signed. Given a webserver on IP 192.168.1.1, how do you secure it to the point that Firefox doesn't offer warnings (and is still secured)?

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• How would you secure a home router with a self-signed certificate?

  - by jldugger

  littleblackbox is publishing "private keys" that are accessible on publicly available firmwares. Debian calls these "snake-oil" certs. Most of these routers are securing their HTTPS certs with these, and as I think about it, I've never seen one of these internal admin websites with certs that wasn't self signed. Given a webserver on IP 192.168.1.1, how do you secure it to the point that Firefox doesn't offer warnings (and is still secured)?

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• Inaccurate bandwidth limiting in altq queues

  - by overkordbaever

  I'm setting up an environment where I have one Linux server, one OpenBSD router and one Linux client and I want to be able to limit how much bandwidth the client should be able to use. I've been performing these tests with "netcat" and "time" (using time to measure the time of the transfer with netcat), and what happens when trying these tests (using the TCP protocol, the queues will for some reason not work with UDP) is that the queues aren't exact at all. For example: when setting a bandwidth limit of 10mbit, the client cannot use more than five mbits, when setting a limit of 100mbit, the client cannot use more than around 50mbit. The config looks like (using a 100mbit limit in the example): #queue rules altq on { $int_if, $ext_if } cbq bandwidth 100Mb queue { def, low } queue def bandwidth 0Mb cbq(default) queue low bandwidth 100Mb cbq(default) #Passrules test pass out quick from $int_if to $ext_if queue low pass in quick from $ext_if to $int_if queue low pass out quick from $ext_if to $int_if queue low pass in quick from $int_if to $ext_if queue low

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• Netcat UDP File Transfer Between Two Servers Times Out?

  - by Mark Bowytz

  I'm testing file transfer speeds between two Red Hat servers that are connected to the same switch within the data center and I decided to use netcat to eliminate protocol overhead as much as possible. Testing in TCP mode went well and I was wondering how UDP might fare. On my receiving (client) end, I ran this: nc -u -l 11225 -v > myfile.out And then on the sending (server) end I ran the following: cat myfile.out | nc -u myserver.foo.zzz.com 11225 -v The file I'm testing with is 38 GB but the transfer seems to stop at around 15 GB (one time at 14.9, another at 15.6). I've tested by adding a "-w 5000" just in case it's timing out but no joy. Adding the -v doesn't show anything except acknowledging that the connection occurred. No errors. So - any suggestions as to why would the transfer cease?

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• changing the default port no of tomcat in ubuntu

  - by codeomnitrix

  Hii all i am trying to change the port no of my tomcat server installed in ubuntu. for this i have changed the file server.xml and made a change there as: <Connector port="8081" protocol="HTTP/1.1" connectionTimeout="20000" URIEncoding="UTF-8" redirectPort="8443" /> But the problem is that whenever i try to open the localhost:8081 it is working fine but when i tried to open localhost:8080 then it is still accessible. So please explain this why this is happening. Secondly when i made the default port to 80 then localhost:80 or localhost then it was not accessible. So please explain this why this is happening. Thanks in advance.

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• check_ssh executed from Nagios server returns "Server answer: ", nothing else

  - by phs

  Commmand works on the host I need to monitor (its IP is denoted as $HOSTADDRESS$ here): [root@host ~]# /usr/local/nagios/libexec/check_ssh localhost SSH OK - OpenSSH_4.3 (protocol 2.0) However, on the Nagios server, it does not: root@server:~# /usr/lib/nagios/plugins/check_ssh -H $HOSTADDRESS$ Server answer: I can see that the port is open: root@server:~# /usr/lib/nagios/plugins/check_tcp -H $HOSTADDRESS$ -p 22 TCP OK - 0.123 second response time on port 22|time=0.123277s;;;0.000000;10.000000 And I can verify with telnet: root@server:/etc/nagios3/conf.d# telnet $HOSTADDRESS$ 22 Trying $HOSTADDRESS$... Connected to $HOSTADDRESS$. Escape character is '^]'. After searching the web for two hours and trying different suggestions I am out of ideas. I have several other hosts with similar setup, and they don't have this problem. I have compared the configs and they look the same (I think). I am clearly missing something here.

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• Is there an online identicon creator?

  - by wonsungi

  I thought the pictures associated with our profiles were automatically generated until they were manually changed. A lot of people have these cool identicons based on their IP address. How can I get my own identicon? I am looking for an online generator. Gravator does not seem to have any options to generate identicons. Edit: I will probably accept your answer if you just tell me how you made your identicon (and it did not involve downloading/installing stuff)

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• Free, web based alternative to Visio?

  - by Lars

  I have used Visio to map out my network structure, and have used the export function to create an HTML page that is searchable by IP, hostname etc. This is a really nice tool and I use it often. However, I would like for users who do not use Internet Explorer to be able to use the search features. What are some alternatives to Visio here? I want to draw a network diagram where objects are searchable. Thanks!

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• Write, wall, who and mesg

  - by miniBill

  I want to set up a server with a lot of users so that (in order of importance): Users cannot obtain ip addresses of other users with who, or last Users cannot wall Users can write to each other Users are able to selectively mesg n other users, as opposed to simply blocking everyone Point 1 is easily solved by a 660 on wtmp and utmp, but I don't know how to achieve the other points The server runs Gentoo Linux

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• SNMP Traps: Telling the difference between sources

  - by MHibbin

  I am logging all incoming SNMP traps to file, for further processing, via: snmptrapd -Lf /path/to/my/file.log So this will log all traps coming in on port 162. Is there a way I can tell the differences between different sources, i.e vendors. I believe this would be the "OID" field but i'm unsure. Any thoughts would be welcomed, if not I will just have to use a lookup with IP addresses, but I'm sure I saw that there is a unique part to each vendor. Cheers

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• Routing domain over lan [closed]

  - by Buri

  I have server on my local network which is exposed to the internet. I have domain pointed on my IP and setup forwarding. The thing i would like to do is when i access example.com from lan to connection be routed directly on my server, not to the nearest DNS. Things I had in mind were to upgrade router with dd-wrt and setup routing rule, or to setup local DNS. Unfortunately, I'm not familiar with neither of those systems.

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• Rsync : execute permission required

  - by user651488

  I'm using rsync between two servers to transfer files. The problem is some files are not transferred. I get this error : rsync: readlink "/var/www/index.html" failed: Permission denied (13) So I check permissions on the server and after make tests, I notice a file is transferred only if it has these permissions : R-W ! If the file have these permissions : R--, Rsync can't download it !? Command: /usr/bin/rsync -avzr -e "/usr/bin/ssh -i /home/replication/thishost-rsync-key" [email protected]:/var/www/index.html ./ Is it a bug with Rsync ? I find any information about this problem. Thanks for your help Debian Etch 2.6.30 Rsync 2.6.9 protocol version 29

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• shorter URLs for locally hosted files

  - by Ashwini

  I have seen in many developer talks, the presenter using a demo.local URL instead of the conventional localhost/demo for faster access. I've read about editing host entries over here How can I create shorter URLs to sites on my computer? but my question is since the localhost IP is the same 127.0.0.1 for every folder inside my var/www or htdocs then how to make it accessible in the shorter format?

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• Windows XP/Firewall -- Can't open UDP port 9100 for JetDirect sharing

  - by Barton Chittenden

  I'm setting up my Dad's laptop (Vista) to print to an HP Deskjet printer attached to a Windows XP Desktop box. The XP box is running Windows firewall. Laptop sits on 192.168.1.66, Desktop 192.168.1.65. I set up logging in the firewall, and determined that it is dropping inbound packets on TCP port 9100, used by JetDirect, the printing protocol. I set up an exception on TCP port 9100, allowing access to the local subnet. There's also an entry under the 'allow applications' tab which was marked for the exact printer model. I selected this as well, then tried to print again... I see more dropped packets from 192.168.1.66 to 192.168.1.65 for TCP port 9100. What do I try next?

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• export block device over network without root

  - by dschatz

  I'm trying to export a file as a block device over the network. I do not have root access on the machine where the file exists. I do have root access on the machine(s) where I will mount the block device. I've seen ATA-Over-Ethernet and ISCSI but there don't seem to be any implementations which allow me to export the block without root at least (some even require kernel modules). Is there an implementation of either of these or some other protocol that doesn't require root? Perhaps I can tunnel ethernet over IP to do this?

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• Enterprise IPv6 Migration - End of proxypac ? Start of Point-to-Point ? +10K users

  - by Yohann

  Let's start with a diagram : We can see a "typical" IPv4 company network with : An Internet acces through a proxy An "Others companys" access through an dedicated proxy A direct access to local resources All computers have a proxy.pac file that indicates which proxy to use or whether to connect directly. Computers have access to just a local DNS (no name resolution for google.com for example.) By the way ... The company does not respect the RFC1918 internally and uses public addresses! (historical reason). The use of internet proxy explicitly makes it possible to not to have problem. What if we would migrate to IPv6? Step 1 : IPv6 internet access Internet access in IPv6 is easy. Indeed, just connect the proxy in Internet IPv4 and IPv6. There is nothing to do in internal network : Step 2 : IPv6 AND IPv4 in internal network And why not full IPv6 network directly? Because there is always the old servers that are not compatible IPv6 .. Option 1 : Same architecture as in IPv4 with a proxy pac This is probably the easiest solution. But is this the best? I think the transition to IPv6 is an opportunity not to bother with this proxy pac! Option 2 : New architecture with transparent proxy, whithout proxypac, recursive DNS Oh yes! In this new architecture, we have: Explicit Internet Proxy becomes a Transparent Internet Proxy Local DNS becomes a Normal Recursive DNS + authorative for local domains No proxypac Explicit Company Proxy becomes a Transparent Company Proxy Routing Internal Routers reditect IP of appx.ext.example.com to Company Proxy. The default gateway is the Transparent Internet proxy. Questions What do you think of this architecture IPv6? This architecture will reveal the IP addresses of our internal network but it is protected by firewalls. Is this a real big problem? Should we keep the explicit use of a proxy? -How would you make for this migration scenario? -And you, how do you do in your company? Thanks! Feel free to edit my post to make it better.

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• arp "who-has tell" on cloned machine

  - by mcmorry

  I have a urgent problem to solve today, but I'm lost. Please help. I've cloned a Virtual Machine hosted on VM Ware ESXi 4.1 The OS is now Ubuntu Server 12.04 LTS, but at the time of cloning it was 10.04 LTS. I fixed the MAC address manually inside /etc/udev/rules.d/70-persistent-net.rules. It is a known problem on Ubuntu. I had to remove the old MAC address and set the new one as eth0. Everything seems to work fine, except ARP. My provider OVH sent me a warning to resolve it today (this is the second day) or they will block my IP! The log contains many lines like this: Tue Jun 5 01:04:29 2012 : arp who-has 178.32.136.212 tell 178.32.136.224 where .224 is the cloned server that is causing problems, and .212 is the cloned one. arp -na returns: ? (178.33.230.254) at 00:07:b4:00:00:02 [ether] on eth0 ? (178.32.136.212) at 00:50:56:09:8e:f1 [ether] on eth0 The first IP is the ESXi machine. The second one should not be there. I'm not an expert and I don't know what else to do to fix this problem. Any help will be very appreciated. Thanks. EDIT: ifcofig on .224: eth0 Link encap:Ethernet HWaddr 00:50:56:01:32:c6 inet addr:178.32.136.224 Bcast:178.32.136.255 Mask:255.255.255.0 inet6 addr: fe80::250:56ff:fe01:32c6/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:399924 errors:0 dropped:465 overruns:0 frame:0 TX packets:241884 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:58006071 (58.0 MB) TX bytes:663603166 (663.6 MB) 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:516216 errors:0 dropped:0 overruns:0 frame:0 TX packets:516216 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:236284275 (236.2 MB) TX bytes:236284275 (236.2 MB) ifconfig on .212: eth0 Link encap:Ethernet HWaddr 00:50:56:09:8e:f1 inet addr:178.32.136.212 Bcast:178.32.136.255 Mask:255.255.255.0 inet6 addr: fe80::250:56ff:fe09:8ef1/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:16014 errors:0 dropped:0 overruns:0 frame:0 TX packets:14511 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:15134444 (15.1 MB) TX bytes:2683025 (2.6 MB) 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:9944 errors:0 dropped:0 overruns:0 frame:0 TX packets:9944 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:1139347 (1.1 MB) TX bytes:1139347 (1.1 MB)

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