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• Turn Off Google Chrome Annoying Link Hover

  - by Volomike

  I like Google Chrome a lot, but there are two problems I have with it. The Address Bar search history feature that I want to turn off, and the feature where I hover over a hyperlink and in the bottom lefthand corner it shows a light blue hover tooltip about where that link goes. I really don't care where a given link goes and wish I could turn that feature off, even if I have to install a Google Chrome Extension. So, for these two reasons, I will not install Google Chrome as my primary browser and will remain with Firefox. So, is there a fix to turn the annoying link hover tooltip feature off?

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• OpenVPN make redirect-gateway optional

  - by Tuinslak

  Hi there, I'm currently running an OpenVPN server for multiple clients. All traffic is directed through the VPN (it's set up as gateway; push "redirect-gateway def1"). So far, all is working fine. However, I'd like to connect a couple of servers to this virtual private network, without these servers using the OVPN daemon as gateway. These servers have to be accessible from both their WAN as well as their LAN IP address. Certain services will be accessible only from the LAN side. Is there any way, for a client, to ignore the push redirect-gateway option? Kind regards, Tuinslak

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• Apache/Django subdomains problem

  - by thomasgg

  Now I have apache configuration which works only with localhost domain (http://localhost/). Alias /media/ "/sciezka/do/instalacji/django/contrib/admin/media/" Alias /site_media/ "/sciezka/do/plikow/site_media/" <Location "/"> SetHandler python-program PythonHandler django.core.handlers.modpython SetEnv DJANGO_SETTINGS_MODULE settings PythonPath "['/thomas/django_projects/project'] + sys.path" PythonDebug On </Location> <Location "/site_media"> SetHandler none </Location> How can I make it working for some subdomains like pl.localhost or uk.localhost? This subdomains should display the same page what domain (localhost). Second question: It is possible change default localhost address (http://localhost/) to (http://localhost.com/) or (http://www.localhost.com/) or something else?

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• DKIM passes everywhere apart from Yahoo!

  - by Ian

  Hi, I'm using dkim-milter, Postfix on Ubuntu (I think I used these instructions for setting up). Anyway, using the reflectors such as Port25, BlackOps and Altn.com I get passes for DKIM: X-DKIM: OpenDKIM Filter v2.0.1 medusa.blackops.org o2SGTMSg005616 Authentication-Results: medusa.blackops.org; dkim=pass (1024-bit key) [email protected]; dkim-adsp=pass dkim=pass header.d=example.com (b=miSIxi7TMX; 1:0:good); Authentication-Results: verifier.port25.com header.d=example.com; dkim=pass (matches From: [email protected]); Yahoo gives this: Authentication-Results: mta1031.mail.ukl.yahoo.com from=; domainkeys=neutral (no sig); from=example.com; dkim=permerror (key failed) Where, obviously, example.com is my site address. Is anyone aware of anything different with Yahoo! that would stop these from signing? TIA

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• Wireless Bridge with NetGear and TP-Link

  - by Tiago Cruz

  I have a wireless NetGear WGR614 v7 (little old) router connected to the internet, but I can't get a good signal in the other end of my house. I have another new one, model TP-Link TL-WR941ND wireless router. I was able to do the stuff works using a wired cable, but now, I would like to do the same using wireless connections (bridge mode, some like WDS?) Now, the computer connected to TP LINK was able to ping my computer connected to NETGEAR, but we cannot go IP ADDRESS outside my network, only internals ones. What can I do to configure this? Is needed that BOTH wireless routers support BRIDGE mode or only one its good enough? Thanks a lot!!

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• Ping, firewall or DNS problem on Win Server 2008 R2

  - by Fred Kaiser

  Hi there, I've installed windows server 2008 as a VM for the developers here to work on. Installed SQL Server 2008 as well as IIS7. I am not quite sure why, I can remote into that machine using the name I gave to it (winserverdev) but the guys that are supposed to use the bloody thing can't. One very interesting thing is that I can connect but I can't ping... not the name nor the IP address. Is there anything that I should be looking in order to make it work? Any ideas are welcome. Thanks heaps in advance, I really appreciate it. Cheers, Fred Kaiser

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• Centos Virtual host loading default page

  - by ntechi

  I have asked a question which was related to this but not same, I have a centos VPS, which has two wordpress websites, one is mbas.co.in and another is onlinemba123.com, now for virtual hosting using just ONE IP ADDRESS, first I started mbas.co.in, which is working fine, when I added onlinemba123.com then, it is loading default Centos page instead of my website, and I am just testing my onlinemba123 website, I haven't configured DNS for it, I am testing it through editing my PC's hosts file, My website folder names are also same as in the conf file below Now my question is how can I load my website instead of Default page, is my virtual host config fine? My virtual host config: NameVirtualHost *:80 <VirtualHost *:80> ServerAdmin [email protected] DocumentRoot /var/www/html/www.mbas.co.in ServerName mbas.co.in ErrorLog logs/mbas.co.in-error_log CustomLog logs/mbas.co.in-access_log common </VirtualHost> <VirtualHost *:80> ServerAdmin [email protected] DocumentRoot /var/www/html/www.onlinemba123.com ServerName www.onlinemba123.com ErrorLog logs/onlinemba123-error_log CustomLog logs/onlinemba123-access_log common </VirtualHost> My computers host file is: xx.xxx.xxx.xxx www.onlinemba123.com

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• Where is Amazon Linux AMI Test Page EC2?

  - by fuzzybee

  I have set up my websites as directories directly under /var/www/html/ and they are working just fine (the websites are mapped to virtual hosts). So, this is mainly out of curiosity for the moment. Furthermore, being able to customise this might bring some benefits in the future e.g. branding the elastic IPs my computer use temporarily. Notes I can always create a index.html page under /var/www/html/ and modify it but that's not my goal here. I can also map the elastic IP address to a directory /var/www/html/default/ and do my stuffs there but that is not also my goal here My goal is the find the Amazon Linux AMI test page I've tried running Linux command to find it but it takes too long obviously

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• Apache error_log repeated attempts to access forum.php

  - by bMon

  About every two seconds I am getting: [Sat Feb 19 19:00:01 2011] [error] [client 69.239.204.217] script '/var/www /html/forum.php' not found or unable to stat [Sat Feb 19 19:00:04 2011] [error] [client 69.239.204.217] File does not exist: /var/www/html/404.shtml ..in my /var/log/httpd/error_log file. Sometimes the request will be for forum_asp.php. I'm assuming its a bot trying to access insecure forum files, but I'm not so sure since it appears each is a unique IP and not just a few rouge IPs hitting it consecutively. And whois results of the ip's aren't all the classic ISP in Russia or China, they are more end user address (comcast, etc). Any insight into whats going on here would be appreciated. Also, any techniques people use to do a "live monitor" of web traffic would be appreciated. Right now I'm doing a: tail -f error_log Thanks.

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• Shorten Long DNS names

  - by user32425

  Hi, Amazon gives us a very long dns names i.e. c-123-123-123-255.compute-1.amazonaws.com Is there a way to map this name into a shorter name i.e. essentially what i want to do is to modify /etc/hosts file, and map the long name into a short one, i.e. aws1 c-123-123-123-255.compute-1.amazonaws.com but because /etc/hosts file only accepts ip address mapping, then I cannot do that. Is there any other way to do this? Thanks

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• Cisco 877 as a VPN server?

  - by Massimo

  I have a Cisco 877 router which connects my network to the Internet using an ADSL line, a single public IP address and NAT; the IOS version is 15. Everything is working ok, but I'd like to configure this router to be a VPN server, to be able to connect to the network from the outside. I've tried looking for documentation, but everything I can find is related to having the 877 act as a VPN client, or to site-to-site VPNs; I can't find anything about letting single remote computers access the internal network, which is something I can do quite easily using Windows' RRAS or ISA Server. Can the Cisco 877 act as a VPN server for remote client computers? (Looks like it should, but just to be sure...) Which type of VPNs does it support? Do they require some special software on the client machines, or can they be used by standard out-of-the-box Windows computers? And, finally: how to set up this?

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• Sendmail Issue - Local Mail / Inner Domain Mail

  - by ngl5000

  Environments: Ubuntu / Sendmail / Google Apps Emailing: I send and receive all of my emails through google apps besides emails that are sent directly from my website. My Web Domain: example.com (for the purpose of the question only) Problem: When my website sends an email, using sendmail, to any local address ([email protected]) I get an unknown user error. Emails sent to other domains seem to work just fine. Question: I believe this is because I don't have these users defined on my ubuntu server, this is besides the point I need to configure sendmail such that it doesn't pick out local emails sent to ([email protected]) and instead finds their name server which points to google apps and sends it there instead. This is my first try at serverfault, I normally use stackoverflow so let me know if I'm messing up! Thank you!

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• OpenVPN on Ubuntu 11.10 - unable to redirect default gateway

  - by Vladimir Kadalashvili

  I'm trying to connect to connect to OpenVPN server from my Ubuntu 11.10 machine. I use the following command to do it (under root user): openvpn --config /home/vladimir/client.ovpn Everything seems to be OK, it connects normally without any warnings and errors, but when I try to browse the internet I see that I still use my own IP address, so VPN connection doesn't work. When I run openvpn command, it displays the following message among others: NOTE: unable to redirect default gateway -- Cannot read current default gateway from system I think it's the cause of this problem, but unfortunately I don't know how to fix it. Below is full output of openvpn command: Sat Jun 9 23:51:36 2012 OpenVPN 2.2.0 x86_64-linux-gnu [SSL] [LZO2] [EPOLL] [PKCS11] [eurephia] [MH] [PF_INET6] [IPv6 payload 20110424-2 (2.2RC2)] built on Jul 4 2011 Sat Jun 9 23:51:36 2012 NOTE: OpenVPN 2.1 requires '--script-security 2' or higher to call user-defined scripts or executables Sat Jun 9 23:51:36 2012 Control Channel Authentication: tls-auth using INLINE static key file Sat Jun 9 23:51:36 2012 Outgoing Control Channel Authentication: Using 160 bit message hash 'SHA1' for HMAC authentication Sat Jun 9 23:51:36 2012 Incoming Control Channel Authentication: Using 160 bit message hash 'SHA1' for HMAC authentication Sat Jun 9 23:51:36 2012 LZO compression initialized Sat Jun 9 23:51:36 2012 Control Channel MTU parms [ L:1542 D:166 EF:66 EB:0 ET:0 EL:0 ] Sat Jun 9 23:51:36 2012 Socket Buffers: R=[126976->200000] S=[126976->200000] Sat Jun 9 23:51:36 2012 Data Channel MTU parms [ L:1542 D:1450 EF:42 EB:135 ET:0 EL:0 AF:3/1 ] Sat Jun 9 23:51:36 2012 Local Options hash (VER=V4): '504e774e' Sat Jun 9 23:51:36 2012 Expected Remote Options hash (VER=V4): '14168603' Sat Jun 9 23:51:36 2012 UDPv4 link local: [undef] Sat Jun 9 23:51:36 2012 UDPv4 link remote: [AF_INET]94.229.78.130:1194 Sat Jun 9 23:51:37 2012 TLS: Initial packet from [AF_INET]94.229.78.130:1194, sid=13fd921b b42072ab Sat Jun 9 23:51:37 2012 VERIFY OK: depth=1, /CN=OpenVPN_CA Sat Jun 9 23:51:37 2012 VERIFY OK: nsCertType=SERVER Sat Jun 9 23:51:37 2012 VERIFY OK: depth=0, /CN=OpenVPN_Server Sat Jun 9 23:51:38 2012 Data Channel Encrypt: Cipher 'BF-CBC' initialized with 128 bit key Sat Jun 9 23:51:38 2012 Data Channel Encrypt: Using 160 bit message hash 'SHA1' for HMAC authentication Sat Jun 9 23:51:38 2012 Data Channel Decrypt: Cipher 'BF-CBC' initialized with 128 bit key Sat Jun 9 23:51:38 2012 Data Channel Decrypt: Using 160 bit message hash 'SHA1' for HMAC authentication Sat Jun 9 23:51:38 2012 Control Channel: TLSv1, cipher TLSv1/SSLv3 DHE-RSA-AES256-SHA, 1024 bit RSA Sat Jun 9 23:51:38 2012 [OpenVPN_Server] Peer Connection Initiated with [AF_INET]94.229.78.130:1194 Sat Jun 9 23:51:40 2012 SENT CONTROL [OpenVPN_Server]: 'PUSH_REQUEST' (status=1) Sat Jun 9 23:51:40 2012 PUSH: Received control message: 'PUSH_REPLY,explicit-exit-notify,topology subnet,route-delay 5 30,dhcp-pre-release,dhcp-renew,dhcp-release,route-metric 101,ping 5,ping-restart 40,redirect-gateway def1,redirect-gateway bypass-dhcp,redirect-gateway autolocal,route-gateway 5.5.0.1,dhcp-option DNS 8.8.8.8,dhcp-option DNS 8.8.4.4,register-dns,comp-lzo yes,ifconfig 5.5.117.43 255.255.0.0' Sat Jun 9 23:51:40 2012 Unrecognized option or missing parameter(s) in [PUSH-OPTIONS]:4: dhcp-pre-release (2.2.0) Sat Jun 9 23:51:40 2012 Unrecognized option or missing parameter(s) in [PUSH-OPTIONS]:5: dhcp-renew (2.2.0) Sat Jun 9 23:51:40 2012 Unrecognized option or missing parameter(s) in [PUSH-OPTIONS]:6: dhcp-release (2.2.0) Sat Jun 9 23:51:40 2012 Unrecognized option or missing parameter(s) in [PUSH-OPTIONS]:16: register-dns (2.2.0) Sat Jun 9 23:51:40 2012 OPTIONS IMPORT: timers and/or timeouts modified Sat Jun 9 23:51:40 2012 OPTIONS IMPORT: explicit notify parm(s) modified Sat Jun 9 23:51:40 2012 OPTIONS IMPORT: LZO parms modified Sat Jun 9 23:51:40 2012 OPTIONS IMPORT: --ifconfig/up options modified Sat Jun 9 23:51:40 2012 OPTIONS IMPORT: route options modified Sat Jun 9 23:51:40 2012 OPTIONS IMPORT: route-related options modified Sat Jun 9 23:51:40 2012 OPTIONS IMPORT: --ip-win32 and/or --dhcp-option options modified Sat Jun 9 23:51:40 2012 ROUTE: default_gateway=UNDEF Sat Jun 9 23:51:40 2012 TUN/TAP device tun0 opened Sat Jun 9 23:51:40 2012 TUN/TAP TX queue length set to 100 Sat Jun 9 23:51:40 2012 do_ifconfig, tt->ipv6=0, tt->did_ifconfig_ipv6_setup=0 Sat Jun 9 23:51:40 2012 /sbin/ifconfig tun0 5.5.117.43 netmask 255.255.0.0 mtu 1500 broadcast 5.5.255.255 Sat Jun 9 23:51:45 2012 NOTE: unable to redirect default gateway -- Cannot read current default gateway from system Sat Jun 9 23:51:45 2012 Initialization Sequence Completed Output of route command: Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface default * 0.0.0.0 U 0 0 0 ppp0 5.5.0.0 * 255.255.0.0 U 0 0 0 tun0 link-local * 255.255.0.0 U 1000 0 0 wlan0 192.168.0.0 * 255.255.255.0 U 0 0 0 wlan0 stream-ts1.net. * 255.255.255.255 UH 0 0 0 ppp0 Output of ifconfig command: eth0 Link encap:Ethernet HWaddr 6c:62:6d:44:0d:12 inet6 addr: fe80::6e62:6dff:fe44:d12/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:54594 errors:0 dropped:0 overruns:0 frame:0 TX packets:59897 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:44922107 (44.9 MB) TX bytes:8839969 (8.8 MB) Interrupt:41 Base address:0x8000 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:4561 errors:0 dropped:0 overruns:0 frame:0 TX packets:4561 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:685425 (685.4 KB) TX bytes:685425 (685.4 KB) ppp0 Link encap:Point-to-Point Protocol inet addr:213.206.63.44 P-t-P:213.206.34.4 Mask:255.255.255.255 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1492 Metric:1 RX packets:53577 errors:0 dropped:0 overruns:0 frame:0 TX packets:58892 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:3 RX bytes:43667387 (43.6 MB) TX bytes:7504776 (7.5 MB) tun0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 inet addr:5.5.117.43 P-t-P:5.5.117.43 Mask:255.255.0.0 UP POINTOPOINT RUNNING NOARP 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:100 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) wlan0 Link encap:Ethernet HWaddr 00:27:19:f6:b5:cf inet addr:192.168.0.1 Bcast:0.0.0.0 Mask:255.255.255.0 inet6 addr: fe80::227:19ff:fef6:b5cf/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:12079 errors:0 dropped:0 overruns:0 frame:0 TX packets:11178 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:1483691 (1.4 MB) TX bytes:4307899 (4.3 MB) So my question is - how to make OpenVPN redirect default gateway? Thanks!

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• What is the difference betweeen "Network install" and "Network Boot" options in virt-manager when installing a new virtual machine

  - by Marwan

  From my understanding of PXE (Preboot Execution Environment), I know that there must be some negotiation first between the booting client and a DHCP server to obtain network parameters (IP address, etc) in order for the client to be able to fetch the boot loader and kernel image from the boot server. In other words, and aside from being a "virtual" machine, we're talking here about a "bare metal" machine, so there must be some "pre boot" mechanism for those negotiations to take place, and this is exactly what PXE is all about. When I think about the "Network install" option, I can't figure out how the new VM would be able to fetch the boot images (bootloader and kernel) without the previously mentioned mechanism. So, here is a short version of the question: When provisioning a new virtul machine, how do you expect the "Network install" option in virt-manager to work behind the scenes? Many thanks.

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• mac osx cannot connect to windows 7 machine

  - by Binary X

  I have a Mac OSX (Snow Leopard 10.6.6) setup on a network with several Windows 7 machines. When trying to place a large file on a Windows share the connection to the Windows share gets lost and I am unable to reconnect until I reboot the Mac. I know this is on the Windows side because the Mac can connect and transfer files to Server 2008 and XP without issue. Looking in the log file I see this message SharePointBrowser::handleOpenCallBack returned 12 I have tried restarting the com.apple.netauth.sysagent service but that did not resolve the situation. I can do an nslookup to the Windows 7 machine, but trying to ping the machine by hostname always gives a hostname lookup failure (I can ping via IP address). I cannot connect to the machine via IP adress either. Any help would be appreciated.

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• Isolating VMware virtual machines from the network

  - by jetboy

  I have: VMware Workstation 7 running on a Windows 7 box (with a single NIC), with multiple virtual machines running a range of OSs. The host box is connected to a WRT54G router running Tomato firmware. The router is acting as a wireless bridge to another WRT54G that's wired to my broadband modem. I can access the VMs externally via VNC using VMware's Remote Display. Over time I've had these running: a. Using NAT networking (single IP) with port forwarding on the router and a custom port in VMware for each VM. b. Using bridged networking with static IPs assigned to each VM via MAC address, and port forwarding on the router to each IP running with standard ports. Either way, the host box, and other physical machines on the network are accessible from the VMs. Is there a way to isolate the VMs from the rest of the network, but still maintain internet access and remote VNC to the VMs?

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• Oracle’s AutoVue Enables Visual Decision Making

  - by Pam Petropoulos

  That old saying about a picture being worth a thousand words has never been truer.  Check out the latest reports from IDC Manufacturing Insights which highlight the importance of incorporating visual information in all facets of decision making and the role that Oracle’s AutoVue Enterprise Visualization solutions can play. Take a look at the excerpts below and be sure to click on the titles to read the full reports. Technology Spotlight: Optimizing the Product Life Cycle Through Visual Decision Making, August 2012 Manufacturers find it increasingly challenging to make effective product-related decisions as the result of expanded technical complexities, elongated supply chains, and a shortage of experienced workers. These factors challenge the traditional methodologies companies use to make critical decisions. However, companies can improve decision making by the use of visual decision making, which synthesizes information from multiple sources into highly usable visual context and integrates it with existing enterprise applications such as PLM and ERP systems. Product-related information presented in a visual form and shared across communities of practice with diverse roles, backgrounds, and job skills helps level the playing field for collaboration across business functions, technologies, and enterprises. Visual decision making can contribute to manufacturers making more effective product-related decisions throughout the complete product life cycle. This Technology Spotlight examines these trends and the role that Oracle's AutoVue and its Augmented Business Visualization (ABV) solution play in this strategic market. Analyst Connection: Using Visual Decision Making to Optimize Manufacturing Design and Development, September 2012 In today's environments, global manufacturers are managing a broad range of information. Data is often scattered across countless files throughout the product life cycle, generated by different applications and platforms. Organizations are struggling to utilize these multidisciplinary sources in an optimal way. Visual decision making is a strategy and technology that can address this challenge by integrating and widening access to digital information assets. Integrating with PLM and ERP tools across engineering, manufacturing, sales, and marketing, visual decision making makes digital content more accessible to employees and partners in the supply chain. The use of visual decision-making information rendered in the appropriate business context and shared across functional teams contributes to more effective product-related decision making and positively impacts business performance.

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• KVM virtual machine networking, NAT and bridge together

  - by stoqlt

  I have two running KVM guests on an Ubuntu (Lucid) host. One of them uses the simplest NAT method, and DHCP inside. The other uses the bridge method and static IP inside. Both work fine. Can I mix the networking methods? I'd like to create some set of scripts which used the local 192.168.122.x address, no matter if the guest has or not has an additional bridged LAN interface. Having eth0 and eth1 interfaces inside would be fine. Thanks for your interest.

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• iptables openvpn forward selectively from eth to tun

  - by Bryan Hunt

  Simple for those who know, indecipherable for those who don't... I'm running openVPN on (hypothetical) 66.66.66.66, I want to FORWARD incoming traffic, arriving on interface eth0 to interface tun0. It would also be nice to filter - based on destination IP address. I'm doing the NAT later on, but like to lock down early wherever possible. So onto the main course... This works: #Enable forwarding from eth0 to tun0 iptables -A FORWARD -i eth0 -o tun+ -j ACCEPT But this doesn't pass any packets whatsoever: #Stricter version iptables -A FORWARD -i eth0 -o tun+ --dst 66.66.66.66 -j ACCEPT Am I being unacceptably foolish?

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• Cannot access Tomcat application remotely, but can access Apache applications

  - by David Keaveny

  I am installing Atlassian's Confluence 4.2 on a clean Ubuntu 12.04 server. Confluence runs on Tomcat 6, and uses PostgreSQL 9.1 as its datastore. I've installed and configured phpPgAdmin to manage PostgreSQL, and Zentyal to manage the server generally. Both these applications use Apache. The problem that I am experiencing is that while I can access phpPgAdmin and Zentyal without problem from a remote PC, I can only access Confluence when running locally (either specified by localhost, IP address or host name). Instead I get an HTTP 502 Connection Failed error. By way of experimentation, I also installed Ajenti, which appears to use lighttpd rather than Apache or Tomcat, and it too works fine when connected to locally, but gives me the same HTTP 502 error when connected to remotely. So applications served from Apache work fine, but applications served from other services do not - does that ring a bell with anyone? It's been over 10 years since I last sysadmin'ed a Linux box, so I'm more than a little rusty!

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• DHCP reply packets do not make it into KVM instance in OpenStack

  - by Lorin Hochstein

  I'm running a KVM instance inside of OpenStack, and it isn't getting an IP address from the DHCP server. Using tcpdump, I can see the request and reply packets on vnet0 of the compute host: # tcpdump -i vnet0 -n port 67 or port 68 tcpdump: WARNING: vnet0: no IPv4 address assigned tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on vnet0, link-type EN10MB (Ethernet), capture size 65535 bytes 19:44:56.176727 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from fa:16:3e:46:f6:11, length 300 19:44:56.176785 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from fa:16:3e:46:f6:11, length 300 19:44:56.177315 IP 10.40.0.1.67 > 10.40.0.3.68: BOOTP/DHCP, Reply, length 319 19:45:02.179834 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from fa:16:3e:46:f6:11, length 300 19:45:02.179904 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from fa:16:3e:46:f6:11, length 300 19:45:02.180375 IP 10.40.0.1.67 > 10.40.0.3.68: BOOTP/DHCP, Reply, length 319 However, if I do the same thing on eth0 inside the KVM instance, I only see the request packets, not the reply packets. What would prevent the packets from making it from vnet0 of the host to eth0 of the guest? My host is running Ubuntu 12.04 and my guest is running CentOS 6.3. Note that I have added this rule in my iptables, but it doesn't resolve the issue: -A POSTROUTING -p udp -m udp --dport 68 -j CHECKSUM --checksum-fill The instance corresponds to vnet0 and is connected via br100: # brctl show bridge name bridge id STP enabled interfaces br100 8000.54781a8605f2 no eth1 vnet0 vnet1 virbr0 8000.000000000000 yes Here's the full iptables-save: # Generated by iptables-save v1.4.12 on Tue Apr 2 19:47:27 2013 *nat :PREROUTING ACCEPT [8323:2553683] :INPUT ACCEPT [7993:2494942] :OUTPUT ACCEPT [6158:461050] :POSTROUTING ACCEPT [6455:511595] :nova-compute-OUTPUT - [0:0] :nova-compute-POSTROUTING - [0:0] :nova-compute-PREROUTING - [0:0] :nova-compute-float-snat - [0:0] :nova-compute-snat - [0:0] :nova-postrouting-bottom - [0:0] -A PREROUTING -j nova-compute-PREROUTING -A OUTPUT -j nova-compute-OUTPUT -A POSTROUTING -j nova-compute-POSTROUTING -A POSTROUTING -j nova-postrouting-bottom -A POSTROUTING -s 192.168.122.0/24 ! -d 192.168.122.0/24 -p tcp -j MASQUERADE --to-ports 1024-65535 -A POSTROUTING -s 192.168.122.0/24 ! -d 192.168.122.0/24 -p udp -j MASQUERADE --to-ports 1024-65535 -A POSTROUTING -s 192.168.122.0/24 ! -d 192.168.122.0/24 -j MASQUERADE -A nova-compute-snat -j nova-compute-float-snat -A nova-postrouting-bottom -j nova-compute-snat COMMIT # Completed on Tue Apr 2 19:47:27 2013 # Generated by iptables-save v1.4.12 on Tue Apr 2 19:47:27 2013 *mangle :PREROUTING ACCEPT [7969:5385812] :INPUT ACCEPT [7905:5363718] :FORWARD ACCEPT [158:48190] :OUTPUT ACCEPT [6877:8647975] :POSTROUTING ACCEPT [7035:8696165] -A POSTROUTING -o virbr0 -p udp -m udp --dport 68 -j CHECKSUM --checksum-fill -A POSTROUTING -p udp -m udp --dport 68 -j CHECKSUM --checksum-fill COMMIT # Completed on Tue Apr 2 19:47:27 2013 # Generated by iptables-save v1.4.12 on Tue Apr 2 19:47:27 2013 *filter :INPUT ACCEPT [2196774:15856921923] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [2447201:1170227646] :nova-compute-FORWARD - [0:0] :nova-compute-INPUT - [0:0] :nova-compute-OUTPUT - [0:0] :nova-compute-inst-19 - [0:0] :nova-compute-inst-20 - [0:0] :nova-compute-local - [0:0] :nova-compute-provider - [0:0] :nova-compute-sg-fallback - [0:0] :nova-filter-top - [0:0] -A INPUT -j nova-compute-INPUT -A INPUT -i virbr0 -p udp -m udp --dport 53 -j ACCEPT -A INPUT -i virbr0 -p tcp -m tcp --dport 53 -j ACCEPT -A INPUT -i virbr0 -p udp -m udp --dport 67 -j ACCEPT -A INPUT -i virbr0 -p tcp -m tcp --dport 67 -j ACCEPT -A FORWARD -j nova-filter-top -A FORWARD -j nova-compute-FORWARD -A FORWARD -d 192.168.122.0/24 -o virbr0 -m state --state RELATED,ESTABLISHED -j ACCEPT -A FORWARD -s 192.168.122.0/24 -i virbr0 -j ACCEPT -A FORWARD -i virbr0 -o virbr0 -j ACCEPT -A FORWARD -o virbr0 -j REJECT --reject-with icmp-port-unreachable -A FORWARD -i virbr0 -j REJECT --reject-with icmp-port-unreachable -A OUTPUT -j nova-filter-top -A OUTPUT -j nova-compute-OUTPUT -A nova-compute-FORWARD -i br100 -j ACCEPT -A nova-compute-FORWARD -o br100 -j ACCEPT -A nova-compute-inst-19 -m state --state INVALID -j DROP -A nova-compute-inst-19 -m state --state RELATED,ESTABLISHED -j ACCEPT -A nova-compute-inst-19 -j nova-compute-provider -A nova-compute-inst-19 -s 10.40.0.1/32 -p udp -m udp --sport 67 --dport 68 -j ACCEPT -A nova-compute-inst-19 -s 10.40.0.0/16 -j ACCEPT -A nova-compute-inst-19 -p tcp -m tcp --dport 22 -j ACCEPT -A nova-compute-inst-19 -p icmp -j ACCEPT -A nova-compute-inst-19 -j nova-compute-sg-fallback -A nova-compute-inst-20 -m state --state INVALID -j DROP -A nova-compute-inst-20 -m state --state RELATED,ESTABLISHED -j ACCEPT -A nova-compute-inst-20 -j nova-compute-provider -A nova-compute-inst-20 -s 10.40.0.1/32 -p udp -m udp --sport 67 --dport 68 -j ACCEPT -A nova-compute-inst-20 -s 10.40.0.0/16 -j ACCEPT -A nova-compute-inst-20 -p tcp -m tcp --dport 22 -j ACCEPT -A nova-compute-inst-20 -p icmp -j ACCEPT -A nova-compute-inst-20 -j nova-compute-sg-fallback -A nova-compute-local -d 10.40.0.3/32 -j nova-compute-inst-19 -A nova-compute-local -d 10.40.0.4/32 -j nova-compute-inst-20 -A nova-compute-sg-fallback -j DROP -A nova-filter-top -j nova-compute-local COMMIT # Completed on Tue Apr 2 19:47:27 2013

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• How to create tunnel to utilize for telnet connection.

  - by Z12

  The scenario is as follows: Machine A is located behind client firewall. The machine runs telnetd. This is Linux machine with Python 2.5.4 installed. I do not know the IP addy of the router and firewall is not open incoming. outgoing firewall is open. Machine B (Windows machine) is a server with well known IP address. I can install any programs I want on either machine. The idea is that I want Machine A to open a socket to machine B. Then I want to hold that socket and use to run a telnet session from Machine B to Machine A telnetd server. Is there any freeware that does this? Thoughts? Thanks!

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• What is needed to use anycast IPs?

  - by coredump

  So, there're a bunch of questions on SF about the uses and how anycast IPs are cool. My approach is something more practical. What specifically I need to have to use one of those addresses? Do I need to be an AS (Autonomous System)? If I want to use an Anycast IP on my internal network, is it possible? Do I need anything special with a registrar/operator(s) to use it? Basically, if I want to use an Anycast IP address, what exactly I need, from the equipment to configuration part.

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• How can I: Convert Physical to VM, the machine it's running on

  - by Daisetsu

  I have virtualized laptops before, when someone gets a new one and doesn't want to quite let go of their old laptop for fear of losing something. This was using VMWare Workstation 7.X. In 8.0 when I go to "Convert a Physical Machine to a Virtual Machine", it asks for an IP address and doesn't give the option to virtualize the machine it's running on. How to I get VMWare to virtualize it's current system? I tried typing in Localhost, and 127.0.0.1 but that didn't do it.

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• configuration transfer over scp on commit not working on Juniper EX-2200 switch

  - by liv2hak

  I am making a series of configuration changes on Junos EX- 2200 switch.I have this router connected to another PC via an ethernet cable.The IP address of the switch is 192.168.1.1.I am able to ping from 192.168.1.1 to 192.168.1.0 and vice-versa. After the changes I make I do the following commands set system archival configuration transfer-on-commit set system archival configuration archive-sites "scp://[email protected]:/home/karthik/ws_karthik/sw1_config_1.txt" password godfather commit Where there is a user with user-name "karthik " and password "godfather".The path shown above also exists in the system How ever I don't see the configuration file sw1_config_1.txt created at the path specified. Also I have verified that sshd is running on the PC (192.168.1.10) Am I doing something wrong here? It would be great if anyone could help me out.

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