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• Internet is not working in base machine

  - by surendar

  I have a Ubuntu desktop. I am running a virtual windows machine using virtual box. Few days before Internet is not working in Ubuntu but it is working in the virtual machine. Even the samba shares are also accessible. I don't know why internet is not working in the base machine. I have tried to ping google.com, but it returns Ubuntu@desktop:~$ ping google.com ping: unknown host google.com ifconfig command's output Ubuntu@desktop:~$ ifconfig eth0 Link encap:Ethernet HWaddr 00:27:0e:1b:86:2a inet addr:192.168.1.7 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::227:eff:fe1b:862a/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:38221 errors:0 dropped:0 overruns:0 frame:0 TX packets:28161 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:39144616 (39.1 MB) TX bytes:6143919 (6.1 MB) Interrupt:27 Base address:0x2000 eth0:0 Link encap:Ethernet HWaddr 00:27:0e:1b:86:2a inet addr:192.168.2.7 Bcast:192.168.2.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Interrupt:27 Base address:0x2000 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:14944 errors:0 dropped:0 overruns:0 frame:0 TX packets:14944 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:1735451 (1.7 MB) TX bytes:1735451 (1.7 MB) vmnet1 Link encap:Ethernet HWaddr 00:50:56:c0:00:01 inet addr:192.168.243.1 Bcast:192.168.243.255 Mask:255.255.255.0 inet6 addr: fe80::250:56ff:fec0:1/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:77 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) vmnet8 Link encap:Ethernet HWaddr 00:50:56:c0:00:08 inet addr:172.16.162.1 Bcast:172.16.162.255 Mask:255.255.255.0 inet6 addr: fe80::250:56ff:fec0:8/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:78 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

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• Issue with user having a gmail account and Google Apps account using same email/username

  - by Joshua

  Greetings! We have a user in our organization that had been using her email address at our domain at her username for gmail.com We recently moved our folks on to Google Apps, and have just moved our email server over to Google (IMAP/SMTP). I'm having all kinds of trouble only with this user's account with her sending and receiving email via the new Google mail server and wondering if it's because of her existing Gmail account. So her email address with us is [email protected], which is her login/user id with us on our Google Apps site. She still has her gmail identity tied to that same [email protected]. She's ok with deleting her old Gmail account...if I do so however will it goof things up for her going forward with us on the Google Apps site? Will she not be able to receive email? Thanks! Joshua

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• Slow IE8 Start-up due to LDAP DNS queries

  - by MikeJ-UK

  Recently (in the last few days), my installation of IE8 has been taking 15 to 20 seconds to load my home page. Specifically, the sequence of events (as reported by WireShark) is:- Browser issues a DNS A query to resolve the home page server's IP address. Browser then spends the next 15-20 seconds broadcasting DNS SRV _LDAP._TCP queries, (roughly on a 2 second tick) to which it receives no answer (we have no LDAP servers). Browser re-issues the DNS A query and resolves the server's IP address again. Finally, the browser issues an HTTP GET for the home page. Does anyone know why this is happening? Possibly related to this question EDIT: @Massimo, LDAP query is :- Domain Name System (query) Transaction ID: 0x11c5 Flags: 0x0100 (Standard query) Questions: 1 Answer RRS: 0 Authority RRS: 0 Additional RRS: 0 Queries _LDAP._TCP: type SRV, class IN Name: _LDAP._TCP Type: SRV (Service location) Class: IN (0x0001)

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• Non-Registry Fix for Secondary Mailboxes Sent Items

  - by Jai Kang

  There is a known issue with Outlook and Exchange where "secondary" mailboxes which are mounted in the same profile, e.g. "John Doe" + CorpMailbox1, CorpMailbox2, CorpMailbox3 will place "sent items" from the secondary mailboxes (e.g. CorpMailbox1) in the user's (e.g. "John Doe") Sent Items folder. There is a registry value (something like DelegateSentItems) to semi-fix this, but I'm looking for an Exchange-side solution. It seems like, at some point, an admin made CC rules to fix this, and for the mailboxes where I see a BCC rule: any item sent to [address] BCC to [address]. The behavior "fixes" the issue, but when I duplicate this work-around for new shared mailboxes, the email ends up in the Inbox and not the Sent Items for the shared mailbox. I don't believe there is any outlook/client-side shenanigans going on, as the intended behavior for the older mailboxes works for new PCs/Users (new imagse) without any Outlook Mailbox Rules.

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• How to create a "retro" pixel shader for transformed 2D sprites that maintains pixel fidelity?

  - by David Gouveia

  The image below shows two sprites rendered with point sampling on top of a background: The left skull has no rotation/scaling applied to it, so every pixel matches perfectly with the background. The right skull is rotated/scaled, and this results in larger pixels that are no longer axis aligned. How could I develop a pixel shader that would render the transformed sprite on the right with axis aligned pixels of the same size as the rest of the scene? This might be related to how sprite scaling was implemented in old games such as Monkey Island, because that's the effect I'm trying to achieve, but with rotation added. Edit As per kaoD's suggestions, I tried to address the problem as a post-process. The easiest approach was to render to a separate render target first (downsampled to match the desired pixel size) and then upscale it when rendering a second time. It did address my requirements above. First I tried doing it Linear -> Point and the result was this: There's no distortion but the result looks blurred and it loses most of the highlights colors. In my opinion it breaks the retro look I needed. The second time I tried Point -> Point and the result was this: Despite the distortion, I think that might be good enough for my needs, although it does look better as a still image than in motion. To demonstrate, here's a video of the effect, although YouTube filtered the pixels out of it: http://youtu.be/hqokk58KFmI However, I'll leave the question open for a few more days in case someone comes up with a better sampling solution that maintains the crisp look while decreasing the amount of distortion when moving.

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• How do developers verify that software requirement changes in one system do not violate a requirement of downstream software systems?

  - by Peter Smith

  In my work, I do requirements gathering, analysis and design of business solutions in addition to coding. There are multiple software systems and packages, and developers are expected to work on any of them, instead of being assigned to make changes to only 1 system or just a few systems. How developers ensure they have captured all of the necessary requirements and resolved any conflicting requirements? An example of this type of scenario: Bob the developer is asked to modify the problem ticket system for a hypothetical utility repair business. They contract with a local utility company to provide this service. The old system provides a mechanism for an external customer to create a ticket indicating a problem with utility service at a particular address. There is a scheduling system and an invoicing system that is dependent on this data. Bob's new project is to modify the ticket placement system to allow for multiple addresses to entered by a landlord or other end customer with multiple properties. The invoicing system bills per ticket, but should be modified to bill per address. What practices would help Bob discover that the invoicing system needs to be changed as well? How might Bob discover what other systems in his company might need to be changed in order to support the new changes\business model? Let's say there is a documented specification for each system involved, but there are many systems and Bob is not familiar with all of them. End of example. We're often in this scenario, and we do have design reviews but management places ultimate responsibility for any defects (business process or software process) on the developer who is doing the design and the work. Some organizations seem to be better at this than others. How do they manage to detect and solve conflicting or incomplete requirements across software systems? We currently have a lot of tribal knowledge and just a few developers who understand the entire business and software chain. This seems highly ineffective and leads to problems at the requirements level.

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• Website requests not reaching IIS?

  - by pete the pagan-gerbil

  To start off with a confession, I am not a server admin - just a developer tasked with getting to the root of a problem. Please be gentle! I have an intranet ASP.NET website running in IIS on a virtual machine. The website is not accessed very often (the last IIS log file was modified nearly six months ago). Both the IP address and Host header value are now failing to return the website, and the IIS log still doesn't show any more recent activity. The virtual machine was moved to a different physical location a few months ago, and the IP address for it has changed. Could this be what has broken access to the site? What else should I be checking to solve this? I don't have totally unrestricted access to the building's network settings, structures, etc. I would be grateful for any advice, even if I can't use it myself it'll improve my knowledge of what's going on behind the scenes!

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• How to add IP range to a server?

  - by Efe Cakinberk

  Hello, First of all I must say that I'm ver inexperienced server and network user. But I rented a unmanaged dedicated server. Well I didn't know what unmanaged really means, then I learned it when I needed support. Well I must do everything by myself. I have a problem. I had already 4 IPs on my server when I rented it. But then I needed more Ips and my server assigned me 32 Ips in which I can only use 27 of them. 85.25.230.0 - 85.25.230.31 this is my Ip range and they say the following Ips must not be configured on the server: 85.25.230.0 - network address 85.25.230.1 - gateway address 85.25.230.2 - router redundancy 85.25.230.3 - router redundancy 85.25.230.31 - broadcast address But the problem is ok Ips are assigned to me but they are not setup on my server. How will I setup Ips to work on my server? I did this after my reseach on google: I used this command on command prompt: route add 85.25.230.0 mask 255.255.255.224 85.25.230.1 metric 1 if then it said OK!. and I thought they should be working. (btw, mask is given to me by my ISP and I don't know metric 1 and if means I just saw it on the net and write it here) I setup my domains via using Plesk Kontrol Panel. So i added one domain and setup one of my new Ips 85.25.230.5 to it. But no it is not working. When I visit the domain via browser, there is a Plesk page comes and says this domain is not configured on the server. Then I changed the domains Ip to one of my old Ips which are given to me with the server and which I have been using for my other domains for a long time. Ok in a second, domain started working. I set it back to my new Ip and domain did not work. As I said, I'm not an expert and do not now the logic. But I'm eager to learn. Can you tell me what might couse the problem and did I do wrong while setting up IP RANGE to my server, if so how can I set them up? Thank you, Efe

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• Making application behind reverse proxy aware of https

  - by akaIDIOT

  https in tomcat being the hassel it is, I've been trying to get an Axis2 webapp to work behind a reverse proxy for ages now, can't seem to get it to work. The proxying itself works like a charm, but the app fails to generate 'links' (or ports as it concerns SOAP) using https. It would seem I need some way to let Axis2 know it is being accessed through https, even though the actual transport to it is done over http (proxied from localhost). The nginx config that proxies https to localhost:8080: server { listen 443; server_name localhost; ssl on; ssl_certificate /path/to/.pem ssl_certificate_key /path/to/.key; ssl_session_timeout 5m; ssl_protocols SSLv3 TLSv1; ssl_ciphers ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv3:+EXP; ssl_prefer_server_ciphers on; location / { # force some http-headers (avoid confusing tomcat) proxy_set_header X-Real-IP $remote_addr; proxy_set_header Host $http_host; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header X-Forwarded-Proto https; # pass requests to local tomcat server listening on default port 8080 proxy_pass http://localhost:8080; } } The proxy itself works fine, the info pages of the webapp work. The problem lies in the ports generated in the .wsdl: <wsdl:service name="WebService"> <wsdl:port name="WebServiceHttpSoap11Endpoint" binding="ns:WebServiceSoap11Binding"> <soap:address location="http://10.10.3.96/axis2/services/WebService.WebServiceHttpSoap11Endpoint/"/> </wsdl:port> <wsdl:port name="WebServiceHttpSoap12Endpoint" binding="ns:WebServiceSoap12Binding"> <soap12:address location="http://10.10.3.96/axis2/services/WebService.WebServiceHttpSoap12Endpoint/"/> </wsdl:port> <wsdl:port name="WebServiceHttpEndpoint" binding="ns:WebServiceHttpBinding"> <http:address location="http://10.10.3.96/axis2/services/WebService.WebServiceHttpEndpoint/"/> </wsdl:port> </wsdl:service> The Host header does its job; it shows 10.10.3.96 in stead of localhost, but as the snippet shows: it says http:// in front of it in stead of https://. My client app can't deal with this... Adding proxyPort and proxyName to the tomcat6 server.xml in the default <Connector> doesn't help; I'm at a loss on how to get this to work properly.

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• StrongSwan + xl2tpd client timeout between 2-5 minutes

  - by Howard Guo

  I run CentOS 6.4 on Amazon EC2, using xl2tpd-1.3.1 from EPEL repository together with StrongSwan 5.0.4. I setup a simple IPSec connection: conn l2tp type=transport keyexchange=ikev1 rekey=no authby=psk leftsubnet=0.0.0.0/0 rightsubnet=0.0.0.0/0 compress=yes auto=add And here is xl2tpd.conf: [global] ipsec saref = yes [lns default] ip range = 192.168.0.2-192.168.0.250 local ip = 192.168.0.1 ppp debug = yes pppoptfile = /etc/ppp/options.xl2tpd length bit = yes Here is options.xl2tpd: ms-dns 8.8.4.4 auth lock debug proxyarp There is only one client - Android 4.2 Android connects successfully: Oct 27 19:45:02 ip-172-31-17-30 xl2tpd[2706]: Connection established to x.x.x.x, 59578. Local: 18934, Remote: 29291 (ref=0/0). LNS session is 'default' Oct 27 19:45:02 ip-172-31-17-30 xl2tpd[2706]: Call established with x.x.x.x, Local: 36452, Remote: 29845, Serial: -1369754322 Oct 27 19:45:02 ip-172-31-17-30 pppd[2709]: pppd 2.4.5 started by howard, uid 0 Oct 27 19:45:02 ip-172-31-17-30 pppd[2709]: Using interface ppp0 Oct 27 19:45:02 ip-172-31-17-30 pppd[2709]: Connect: ppp0 <--> /dev/pts/0 Oct 27 19:45:02 ip-172-31-17-30 pppd[2709]: peer from calling number x.x.x.x authorized Oct 27 19:45:02 ip-172-31-17-30 pppd[2709]: Deflate (15) compression enabled Oct 27 19:45:03 ip-172-31-17-30 pppd[2709]: Cannot determine ethernet address for proxy ARP Oct 27 19:45:03 ip-172-31-17-30 pppd[2709]: local IP address 192.168.0.1 Oct 27 19:45:03 ip-172-31-17-30 pppd[2709]: remote IP address 192.168.0.2 Oct 27 19:45:03 ip-172-31-17-30 charon: 06[KNL] 192.168.0.1 appeared on ppp0 Oct 27 19:45:03 ip-172-31-17-30 charon: 06[KNL] 192.168.0.1 disappeared from ppp0 Oct 27 19:45:03 ip-172-31-17-30 charon: 06[KNL] 192.168.0.1 appeared on ppp0 Oct 27 19:45:03 ip-172-31-17-30 charon: 06[KNL] interface ppp0 activated In the meanwhile, Internet works perfectly on the Android client, the VPN connection is stable and fast. However, it always happens that within 2-5 minutes after the connection is established: Oct 27 19:47:07 ip-172-31-17-30 xl2tpd[2706]: Maximum retries exceeded for tunnel 18934. Closing. Oct 27 19:47:07 ip-172-31-17-30 xl2tpd[2706]: Connection 29291 closed to 95.91.227.224, port 59578 (Timeout) Oct 27 19:47:07 ip-172-31-17-30 charon: 06[KNL] interface ppp0 deactivated Oct 27 19:47:07 ip-172-31-17-30 charon: 06[KNL] interface ppp0 deleted Then the VPN connection is broken. So what might have gone wrong? The same L2TP service works flawlessly on iOS 7, MacOS 10.8, and Windows 7, there is no disconnection issue on those OSes. Thank you!

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• windows 7 issues with local domain name

  - by Phill

  Until recently my operating system was XP where for the purpose of development and testing of php and zen cart I set up xampp that included apache http server and mercury mail server I also made changes to C:\Windows\System32\drivers\etc\hosts as follows: 127.0.0.1 www.zen.com # For browser access 127.0.0.1 mail.mercury.com # For email access 127.0.0.1 mercury.com # For mercury mail server This allowed the use of www.zen.com in the address bar of my browser rather than 'localhost' and mail.mercury.com to access email via thunderbird. All was well. Then I installed windows7, I made all the mods and again everything appeared to run as expected.Then I turned off my wireless modem causing all working local connections to fail. Localhost in the address bar still works but not www.zen.com and thunderbird 'cannot find mail.mercury.com' Is there some way to overcome what ever is causing this.

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• Unable to access Citrix XenApp 6 published applications externally

  - by Christopher McCann

  We are trying to use a trial of Citrix XenApp 6 Fundamentals to virtualise a couple of applications as a proof of concept. We haven't ever used it before so I confess to be a noob with it. We can connect to the XenApp web interface, and the iPad app will connect and list the applications, but the applications themselves will not load. I discovered in the .ica file that it was attempting to connect to the internal IP address of the server instead of its static external. I have been following various threads on Citrix but nothing seems to have fixed it for me. The server is deployed on an EC2 instance with a static elastic IP. All the ports are opened and I can telnet into the XenApp server on 1493 and I get the ICA response. I have also run on ALTADDR and provided the external IP address. Does anyone have any ideas?

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• Weird routing issue (updated)

  - by smccloud

  I just updated the route tables due to a mistake on my part. I am working on getting networking working correctly on a cluster of 14 virtual servers at a customer site. 11 of them work fine for routing and 3 don't work correctly for their administrative network (172.28.56.0). All are running Windows Web Server 2008R2. Default gateway is set on the production network (172.28.58.0) and not on the administrative network (handled with persistent static routes). On a working server, route print gives me the following (MACs redacted) =========================================================================== Interface List 11...XX XX XX XX XX XX ......Intel(R) PRO/1000 MT Network Connection 13...XX XX XX XX XX XX00 0c 29 85 b2 98 ......Intel(R) PRO/1000 MT Network Connection #2 1...........................Software Loopback Interface 1 12...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter 14...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #2 15...00 00 00 00 00 00 00 e0 Teredo Tunneling Pseudo-Interface =========================================================================== IPv4 Route Table =========================================================================== Active Routes: Network Destination Netmask Gateway Interface Metric 0.0.0.0 0.0.0.0 172.28.58.1 172.28.58.11 266 10.18.1.22 255.255.255.255 172.28.58.1 172.28.58.11 11 10.32.0.0 255.255.0.0 172.28.56.1 172.28.56.201 11 127.0.0.0 255.0.0.0 On-link 127.0.0.1 306 127.0.0.1 255.255.255.255 On-link 127.0.0.1 306 127.255.255.255 255.255.255.255 On-link 127.0.0.1 306 172.28.34.0 255.255.255.0 172.28.56.1 172.28.56.201 11 172.28.42.0 255.255.255.0 172.28.56.1 172.28.56.201 11 172.28.56.0 255.255.255.0 On-link 172.28.56.201 266 172.28.56.0 255.255.255.0 172.28.56.1 172.28.56.201 11 172.28.56.201 255.255.255.255 On-link 172.28.56.201 266 172.28.56.255 255.255.255.255 On-link 172.28.56.201 266 172.28.58.0 255.255.255.224 On-link 172.28.58.11 266 172.28.58.0 255.255.255.224 172.28.58.1 172.28.58.11 11 172.28.58.1 255.255.255.255 172.28.58.1 172.28.58.11 11 172.28.58.11 255.255.255.255 On-link 172.28.58.11 266 172.28.58.31 255.255.255.255 On-link 172.28.58.11 266 172.28.60.0 255.255.255.0 172.28.56.1 172.28.56.201 11 172.28.63.0 255.255.255.0 172.28.56.1 172.28.56.201 11 192.168.0.0 255.255.0.0 172.28.56.1 172.28.56.201 11 224.0.0.0 240.0.0.0 On-link 127.0.0.1 306 224.0.0.0 240.0.0.0 On-link 172.28.56.201 266 224.0.0.0 240.0.0.0 On-link 172.28.58.11 266 255.255.255.255 255.255.255.255 On-link 127.0.0.1 306 255.255.255.255 255.255.255.255 On-link 172.28.56.201 266 255.255.255.255 255.255.255.255 On-link 172.28.58.11 266 =========================================================================== Persistent Routes: Network Address Netmask Gateway Address Metric 172.28.56.0 255.255.255.0 172.28.56.1 1 172.28.63.0 255.255.255.0 172.28.56.1 1 192.168.0.0 255.255.0.0 172.28.56.1 1 172.28.60.0 255.255.255.0 172.28.56.1 1 10.32.0.0 255.255.0.0 172.28.56.1 1 172.28.34.0 255.255.255.0 172.28.56.1 1 172.28.42.0 255.255.255.0 172.28.56.1 1 0.0.0.0 0.0.0.0 172.28.58.1 Default =========================================================================== IPv6 Route Table =========================================================================== Active Routes: If Metric Network Destination Gateway 1 306 ::1/128 On-link 1 306 ff00::/8 On-link =========================================================================== Persistent Routes: None On one of the non-working server, route print gives me the following (MACs redacted) =========================================================================== Interface List 11...XX XX XX XX XX XX ......Intel(R) PRO/1000 MT Network Connection 13...XX XX XX XX XX XX ......Intel(R) PRO/1000 MT Network Connection #2 1...........................Software Loopback Interface 1 12...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter 14...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #2 16...00 00 00 00 00 00 00 e0 Teredo Tunneling Pseudo-Interface =========================================================================== IPv4 Route Table =========================================================================== Active Routes: Network Destination Netmask Gateway Interface Metric 0.0.0.0 0.0.0.0 172.28.58.1 172.28.58.21 266 10.32.0.0 255.255.0.0 172.28.56.1 172.28.56.211 11 127.0.0.0 255.0.0.0 On-link 127.0.0.1 306 127.0.0.1 255.255.255.255 On-link 127.0.0.1 306 127.255.255.255 255.255.255.255 On-link 127.0.0.1 306 172.28.34.0 255.255.255.0 172.28.56.1 172.28.56.211 11 172.28.42.0 255.255.255.0 172.28.56.1 172.28.56.211 11 172.28.56.0 255.255.255.0 172.28.56.1 172.28.56.211 11 172.28.56.211 255.255.255.255 On-link 172.28.56.211 266 172.28.58.0 255.255.255.0 172.28.58.1 172.28.58.21 11 172.28.58.0 255.255.255.224 On-link 172.28.58.21 266 172.28.58.21 255.255.255.255 On-link 172.28.58.21 266 172.28.58.31 255.255.255.255 On-link 172.28.58.21 266 172.28.60.0 255.255.255.0 172.28.56.1 172.28.56.211 11 172.28.63.0 255.255.255.0 172.28.56.1 172.28.56.211 11 192.168.0.0 255.255.0.0 172.28.56.1 172.28.56.211 11 224.0.0.0 240.0.0.0 On-link 127.0.0.1 306 224.0.0.0 240.0.0.0 On-link 172.28.56.211 266 224.0.0.0 240.0.0.0 On-link 172.28.58.21 266 255.255.255.255 255.255.255.255 On-link 127.0.0.1 06 255.255.255.255 255.255.255.255 On-link 172.28.56.211 266 255.255.255.255 255.255.255.255 On-link 172.28.58.21 266 =========================================================================== Persistent Routes: Network Address Netmask Gateway Address Metric 172.28.56.0 255.255.255.0 172.28.56.1 1 172.28.60.0 255.255.255.0 172.28.56.1 1 172.28.63.0 255.255.255.0 172.28.56.1 1 172.28.34.0 255.255.255.0 172.28.56.1 1 172.28.42.0 255.255.255.0 172.28.56.1 1 192.168.0.0 255.255.0.0 172.28.56.1 1 10.32.0.0 255.255.0.0 172.28.56.1 1 0.0.0.0 0.0.0.0 172.28.58.1 Default 172.28.58.0 255.255.255.0 172.28.58.1 1 =========================================================================== IPv6 Route Table =========================================================================== Active Routes: If Metric Network Destination Gateway 1 306 ::1/128 On-link 1 306 ff00::/8 On-link =========================================================================== Persistent Routes: None I am at a complete loss why the non-working servers have no On-link route for 172.28.56.0. Does anyone have any suggestions on what I should be looking at to figure this out? Also, I do have "physical" access to the console if needed through vSphere Client.

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• Can not access Internet (DNS names do not resolve) after update today

  - by Aras

  I have been using Precise for a few weeks now for work with no problem. Today, I am not able to access any website using either wired or wireless connections. I installed the updates today which included nautilus, xserver, and a new kernel (3.2.0-24). After restarting I no longer was able to browse the Internet using firefox or chrome. Trying to ping google in terminal gives ping: unknown host google.ca I have tried: Connecting to wireless or wired networks (both working on other machines) Restart the machine and boot with previous Kernel Manually configure opendns on my wired connection Restart the network and the laptop and the wireless card Without any success so far. I am not sure where to go next. Please let me know the cause of the issue or help me troubleshoot it. Note that the laptop does receive an ip address, and it can ping ip address of google.ca (74.125.127.94) but not the domain name, or any domain name for that matter. This system was upgraded from 11.10 to 12.04 more two weeks ago.

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• Asterisk: Forcing a sip peer to connect via ipv6?

  - by growse

  I've got an asterisk server that connects to an upstream provider over a WAN. The upstream provider supports both IPv4 and IPv6 connectivity, and the asterisk server is behind a NAT. When asterisk connects to the upstream sip peer via IPv6, everything works perfectly. The issue I have is that when I configure the asterisk server IPv6 address via DHCPv6, a race condition means that asterisk sometimes ends up attempting to contact the upstream peer via IPv4 (the SIP DNS name has both A and AAAA records). This is because asterisk starts up before the system has a valid IPv6 address. The connection does not work via IPv4 because of the NAT. Is there a way of configuring the peer to specify that it should only be contactable over IPv6? I guess it might be possible to hack together a firewall rule to deny all IPv4 traffic to that IP, but it'd be easier to configure this within asterisk itself.

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• Apache HTTPS ProxyPass certificate location

  - by oz1cz

  I'm trying to set up an Apache server that uses ProxyPass to pass HTTPS requests on to another server. Let's call the proxy server ALPHA and the target server BETA. ALPHA does not run HTTPS, but BETA does. I first tried using this virtual host specification on ALPHA: <VirtualHost *:443> ServerName mysite.com ProxyPass / https://192.168.1.105/ # BETA's IP address ProxyPassReverse / https://192.168.1.105/ # BETA's IP address ProxyPreserveHost On ProxyTimeout 600 SSLProxyEngine On RequestHeader set Front-End-Https "On" CacheDisable * </VirtualHost> But when I tried this, Apache complained saying, "[error] Server should be SSL-aware but has no certificate configured [Hint: SSLCertificateFile]". I had to copy the SSL certificate from BETA to ALPHA and add these lines to the host specification on ALPHA: SSLEngine on SSLCertificateKeyFile /usr/local/ssl/private/BETA_private.key SSLCertificateFile /usr/local/ssl/crt/BETA_public.crt SSLCertificateChainFile /usr/local/ssl/crt/BETA_intermediate.crt Now the system works. But I have a feeling that I have done something wrong or unnecessary. I have the web site's private key and certificate lying on both ALPHA and BETA. Is that necessary? Should I have done it differently?

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• chrooting user causes "connection closed" message when using sftp

  - by George Reith

  First off I am a linux newbie so please don't assume much knowledge. I am using CentOS 5.8 (final) and using OpenSSH version 5.8p1. I have made a user playwithbits and I am attempting to chroot them to the directory home/nginx/domains/playwithbits/public I am using the following match statement in my sshd_config file: Match group web-root-locked ChrootDirectory /home/nginx/domains/%u/public X11Forwarding no AllowTcpForwarding no ForceCommand /usr/libexec/openssh/sftp-server # id playwithbits returns: uid=504(playwithbits) gid=504(playwithbits) groups=504(playwithbits),507(web-root-locked) I have changed the user's home directory to: home/nginx/domains/playwithbits/public Now when I attempt to sftp in with this user I instantly get the message: connection closed Does anyone know what I am doing wrong? Edit: Following advice from @Dennis Williamson I have connected in debug mode (I think... correct me if I'm wrong). I have made a bit of progress by using chmod to set permissions recursively of all files in the directly to 700. Now I get the following messages when I attempt to log on (still connection refused): Connection from [My ip address] port 38737 debug1: Client protocol version 2.0; client software version OpenSSH_5.6 debug1: match: OpenSSH_5.6 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.8 debug1: permanently_set_uid: 74/74 debug1: list_hostkey_types: ssh-rsa,ssh-dss debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: client->server aes128-ctr hmac-md5 none debug1: kex: server->client aes128-ctr hmac-md5 none debug1: SSH2_MSG_KEX_DH_GEX_REQUEST received debug1: SSH2_MSG_KEX_DH_GEX_GROUP sent debug1: expecting SSH2_MSG_KEX_DH_GEX_INIT debug1: SSH2_MSG_KEX_DH_GEX_REPLY sent debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: KEX done debug1: userauth-request for user playwithbits service ssh-connection method none debug1: attempt 0 failures 0 debug1: user playwithbits matched group list web-root-locked at line 91 debug1: PAM: initializing for "playwithbits" debug1: PAM: setting PAM_RHOST to [My host info] debug1: PAM: setting PAM_TTY to "ssh" debug1: userauth-request for user playwithbits service ssh-connection method password debug1: attempt 1 failures 0 debug1: PAM: password authentication accepted for playwithbits debug1: do_pam_account: called Accepted password for playwithbits from [My ip address] port 38737 ssh2 debug1: monitor_child_preauth: playwithbits has been authenticated by privileged process debug1: SELinux support disabled debug1: PAM: establishing credentials User child is on pid 3942 debug1: PAM: establishing credentials Changed root directory to "/home/nginx/domains/playwithbits/public" debug1: permanently_set_uid: 504/504 debug1: Entering interactive session for SSH2. debug1: server_init_dispatch_20 debug1: server_input_channel_open: ctype session rchan 0 win 2097152 max 32768 debug1: input_session_request debug1: channel 0: new [server-session] debug1: session_new: session 0 debug1: session_open: channel 0 debug1: session_open: session 0: link with channel 0 debug1: server_input_channel_open: confirm session debug1: server_input_global_request: rtype [email protected] want_reply 0 debug1: server_input_channel_req: channel 0 request env reply 0 debug1: session_by_channel: session 0 channel 0 debug1: session_input_channel_req: session 0 req env debug1: server_input_channel_req: channel 0 request subsystem reply 1 debug1: session_by_channel: session 0 channel 0 debug1: session_input_channel_req: session 0 req subsystem subsystem request for sftp by user playwithbits debug1: subsystem: cannot stat /usr/libexec/openssh/sftp-server: Permission denied debug1: subsystem: exec() /usr/libexec/openssh/sftp-server debug1: Forced command (config) '/usr/libexec/openssh/sftp-server' debug1: session_new: session 0 debug1: Received SIGCHLD. debug1: session_by_pid: pid 3943 debug1: session_exit_message: session 0 channel 0 pid 3943 debug1: session_exit_message: release channel 0 debug1: session_by_channel: session 0 channel 0 debug1: session_close_by_channel: channel 0 child 0 debug1: session_close: session 0 pid 0 debug1: channel 0: free: server-session, nchannels 1 Received disconnect from [My ip address]: 11: disconnected by user debug1: do_cleanup debug1: do_cleanup debug1: PAM: cleanup debug1: PAM: closing session debug1: PAM: deleting credentials

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• EPPM Webcast Series Part II: Build – Consistently delivering successful projects to ensure financial success

  - by Sylvie MacKenzie, PMP

  Oracle Primavera invites you to the second in a series of three webcasts linking Enterprise Project Portfolio Management with enhanced operational performance and better financial results. Join us for the next installment of our 'Plan, Build, Operate' webcast series, as we look to address the challenges organizations face during the execution phase of their projects. Webcast II: Build – Consistently delivering successful projects to ensure financial success. This webcast will look at Three key questions: How do you maintain consistency in delivery whilst maintaining visibility and control? How do you deal with project risk and mitigation strategies? How do you ensure accurate reporting? Hear from Geoff Roberts, Industry Strategist from Oracle Primavera. Geoff will look at how solutions can help to address the challenges around: Visibility and governance Communication and complex coordination Collecting and reporting progress Measuring and reporting It is imperative that organizations understand the impact projects can have on their business. Attend this webcast and understand how consistently delivering successful projects is vital to the financial success of an asset intensive organisation. Register today! Please forward this invite to your colleagues who you think may benefit from attending.

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• Recommendations for managing DNS issues when hosting customer sites.

  - by Thomas

  I'm working at a company which primarily provides SaaS products but also will host some of our customers corporate websites. My question relates to recommendations for managing DNS for client's domain names. My objectives: Not restrict my ability to change the server's IP address such as might happen when I move my servers to a new host. Not have to contact the customer to change their domain's DNS if I need to change the server's IP address. Often times, customers lose this information or have to track down the one person with any knowledge of the domain settings. Map both .clientdomain.com and www.clientdomain.com to the proper IIS site. However, I'm running into a couple of common problems: Sometimes, the DNS console provided by the client's hosting company does not allow for CNAME records. Sometimes, the DNS console provided by the client's hosting company will not let me create a CNAME entry for .spiffydomain.com because the given hosting company has created a SOA record for that entry or simply requires that .spiffydomain.com be an A record. I believe one solution to #2 is to use a wildcard for a CNAME entry (i.e. *.spiffydomain.com). Is that correct? How do other folks that are hosting many customer's site manage change of DNS entries on their servers?

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• Setting up Windows 2008 with VPN and NAT

  - by Benson

  I have a Windows 2008 box set up with VPN, and that works quite well. NPS is used to validate the VPN clients, who are able to access the private address of the server, once connected. I can't for the life of me get NAT working for the VPN clients, though. I've added NAT as a routing protocol, and set the one on in the VPN address pool as private, and the other as public - but it still won't NAT connections when I add a route through the VPN server's IP on the client side (route add SomeInternetIp IpOfPrivateInterfaceOnServer). I know I can reach the server's private interface (which happens to be 10.2.2.1) with remote desktop client, so I can't think of any issues with the VPN.

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• Why does changing the physical socket on your router cause delays?

  - by Josh Browning

  My question involves the delays involved with changing which physical socket your ethernet cable is connected to. I am aware that if you are connected to a router on a network and then change which physical socket on that router you are using you will gain very small additional delays initially. However I am curious as to what causes these delays. I originally thought it was to do with the infromation stored in the routing table and whether that was allocated to a specific socket on the router or not. Although, if your IP address is the same then I don't understand why there would be delays because I would of assumed that any information within the router was linked to an IP address rather than a physical socket.

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• MySQL Workbench sends computer name with login not IP

  - by Android Addict

  I am attempting to connect MySQLWorkbench to a remote MySQL Server. The server has granted access to user@IPAddress However, when I try to connect MySQLWorkbench, it sends user@computername instead. How do I configure the connection to use the IP address instead in MySQLWorkbench? Reference: The remote server is on the local network, so I need to use the local IP address assigned to my client. EDIT What I have tried so far: from the server: mysql -u user@IPAddress -p --host=(ServerIPAddress) Returns: mysql> So that tells me the user account is operational. Furthermore, I confirmed it exists using: select user from mysql.user; returning a table of all users, of which the user I am using is present. I have also opened the port 3306: sbin/iptables -A INPUT -i eth0 -s clientIPAddress -p tcp --destination-port3306 -j ACCEPT Still I encounter Access Denied

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• Ranking hit after WP site migration

  - by Ben

  I migrated my site from its old domain over a month ago. I followed WMT completely, including 301 redirects from every existing URL to the new domain, and then submitting a change of address. Traffic continued as normal, but then a few days after submitting the change of address traffic plummeted to about 20-30% of what it was previously. Most of my traffic come from organic search, and I can see that for the keywords I had targeted before and performed well with and am now ranking much much lower for. In some cases for low competition keywords I've only lost a few places, for higher competition terms I have really suffered. This has started to pick up a bit (one of my keywords I have risen from 195 to 100 in the last week), but it seems to be a very slow process. How seamless is this process normally? I was under the impression that this would not affect my rankings too severely, but it has now been a month since the move and recovery seems to be very slow, if at all. Is it likely that I've missed something? The only change is that I have moved what was the home page to be more of a sub-page, and now in its place is a magazine-style home page. I understand that links to the old site will now be pointing to the latter which means that rankings for some keywords attributed to the old home page will take a hit, but even on other pages that seem to fit in exactly the same page structure as the previous site I have seen a drop in rankings. Any help would be greatly appreciated. Thanks!

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• "Account locked out" security event at midnight

  - by Kev

  The last three midnights I've gotten an Event ID 539 in the log...about my own account: Event Type: Failure Audit Event Source: Security Event Category: Logon/Logoff Event ID: 539 Date: 2010-04-26 Time: 12:00:20 AM User: NT AUTHORITY\SYSTEM Computer: SERVERNAME Description: Logon Failure: Reason: Account locked out User Name: MyUser Domain: MYDOMAIN Logon Type: 3 Logon Process: NtLmSsp Authentication Package: NTLM Workstation Name: SERVERNAME Caller User Name: - Caller Domain: - Caller Logon ID: - Caller Process ID: - Transited Services: - Source Network Address: - Source Port: - It's always within a half minute of midnight. There are no login attempts before it. Right after it (in the same second) there's a success audit entry: Logon attempt using explicit credentials: Logged on user: User Name: SERVERNAME$ Domain: MYDOMAIN Logon ID: (0x0,0x3E7) Logon GUID: - User whose credentials were used: Target User Name: MyUser Target Domain: MYDOMAIN Target Logon GUID: - Target Server Name: servername.mydomain.lan Target Server Info: servername.mydomain.lan Caller Process ID: 2724 Source Network Address: - Source Port: - The process ID was the same on all three of them, so I looked it up, and right now at least it maps to TCP/IP Services (Microsoft). I don't believe I changed any policies or anything on Friday. How should I interpret this?

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• Changing frontend cache

  - by Utsav

  Our architecture consists of a front-end cache that most read only users obtain their data from directly. The front-end cache sits in front of a farm of webservers that serve pages written in PHP. We need to be able to detect certain conditions at the front-end cache level and pass those values through to the back-end via HTTP headers. For example we would like to manually tag the carrier network based on the IP address. So, for incoming traffic if the user is say coming from an IP address in the range of "41.202.192.0"/19 we would tag them as being a Orange Cameroon user by setting the appropriate HTTP request header, e.g., X-Carrier = "Orange Cameroon". Based on the setting of this header we would like to vary the cache and serve a different banner to the end user. How would you go about doing this? Keep in mind that we don't want to pollute the cache and we also don't want to create too many small cache segments. Assumptions: You can assume that the X-Carrier has already been detected in our cache. So, for the purposes of your test you can just set this value manually in your example script.

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