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• Error at the end of APC install

  - by cinqoTimo

  I need to get APC running for a Drupal install of mine. I found a fairly concise guide at http://blog.4rev.net/2009-09/installing-apc-accelerator-into-php5-fedora-core-11/ for installing on FC11, only, I am using FC12. I figured I would give it a shot. I was able to run the following commands successfully - and yum installed fc12 versions of everything in the FC11 guide. yum install php-pear yum install php-devel httpd-devel yum groupinstall ‘Development Tools’ yum groupinstall ‘Development Libraries’ Then, I tried pecl install apc. Everything looked good until to got to the end, where it outputted the following error. /var/tmp/APC/php_apc.c: In function ‘zif_apc_compile_file’: /var/tmp/APC/php_apc.c:881: warning: unused variable ‘eg_class_table’ /var/tmp/APC/php_apc.c:881: warning: unused variable ‘eg_function_table’ /var/tmp/APC/php_apc.c: At top level: /var/tmp/APC/php_apc.c:959: error: duplicate ‘static’ make: *** [php_apc.lo] Error 1 ERROR: `make' failed Some people have had success with installing apc-beta, but that didn't work for me.. Any suggestions? Is there something I missed that is critical in the FC12 version?

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• Proxmox: VMs and different public IPs

  - by Raj

  I have a server which has two NICs and both are directly connected to internet. I have five different public IP addresses available for the VMs. The host machine (Proxmox) doesn't need to use any (it'll use a private IP and that's all) but will have internet connection. I've gone through the Proxmox documentation and I'm not able to understand the big picture to set up the right network configuration for my needs. In short, what I have is: One server (Proxmox, host machine) On that server, 5 VMs are created 5 public IP addresses available (one for each VM), let's say: 80.123.21.1, 80.123.21.2, 80.123.21.3, 80.123.21.4, 80.123.21.5 What I have now for the host is the following: auto lo iface lo inet loopback auto eth0 iface eth0 inet manual auto eth1 iface eth1 inet manual auto vmbr0 iface vmbr0 inet static address 192.168.1.101 netmask 255.255.255.0 bridge_ports eth0 bridge_stp off bridge_fd 0 auto vmbr1 iface vmbr1 inet manual It can be reached from the internal network, so that's OK. It has internet connection, which is also OK. vmbr1 is going to be used by the VMs. Each VM will have its own IP on his network interfaces configuration file. For some reason, VMs will not have internet and they won't be able to have public IP address. If I use NAT, it will work correctly, but they will not use the public allocated IP addresses for them. Am I missing something?

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• VirtualBox with Ubuntu Server guest can't ping outside

  - by Danidan

  Here's my situation: an Ubuntu 12.04 Host running VirtualBox; two guest VMs running Ubuntu Server 12.04 home network, so my Host pc has a wireless connection to the router of my ISP. My problem is in one of the virtual machines: it has 3 NICs, one in NAT mode and the others in Host Only mode. My purpose is to use eth0 (NAT) for Internet access and eth1, eth2 (Host Only) for management of internal virtual network (eth1 uses a VBoxNet with this IP 192.168.69.254). Whenever I try to $ping 8.8.8.8 I get Destination Host Unreachable. While if I $ping 192.168.69.10, that is the IP of the other VM, it works. I can't also ping my Host nor my router My /etc/network/interfaces file is: auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp auto eth1 iface eth1 inet static address 192.168.69.1 netmask 255.255.255.0 auto eth2 iface ifconfig $IFACE 0.0.0.0 up up ip link set $IFACE promisc on down ip link set $IFASE promisc off down ifconfig $IFACE down $route -n returns: Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 10.0.2.2 0.0.0.0 UG 100 0 0 eth0 10.0.2.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 192.168.69.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 192.168.100.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0 Forgetting for now what eth2 needs to do and its setup, why I can't go outside the Host box? What can I do to help you helping me? :-)

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• Is there anything like Heroku for PHP and/or .NET?

  - by Wayne M

  In my area PHP is very widespread, so is .NET. Ruby not so much; most places have never heard of it. For some personal things I am "forced" to choose Rails because I want to take advantage of Heroku - the ability to deploy and scale on the cloud very easily is the main reason. Also, they offer a small FREE plan, with no ads or strings attached, that I can use for demo sites or, in this case, for my business' static page; as a totally bootstrapped startup I have maybe $50 or so in initial capital and cannot afford to pay monthly fees while I'm getting started. Are there any similar offerings for other languages? Specifically, I really like the small, 5MB site for free that Heroku offers - is there anything like that for PHP and/or .NET? I'm not even that concerned about the "cloud" part, but that would be a nice bonus. If there is, I might be able to kill two birds with one stone and pick up a useful skill as I'm doing my own thing instead of using something that nobody else knows or cares about. I should add I'm specifically interested in something that offers a free plan. As I said, Heroku has a 5mb plan that you can have as many as you want for free; I have yet to find anything similar for any other platform (most of the "free" sites require you to have ugly banners on your page, or don't allow you to use your own domain name), and to be honest I'm not too thrilled about using Ruby on Rails for everything simply to take advantage of this. I'm asking this here because I already asked it on StackOverflow and someone suggested it would be better suited here.

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• Server Intermittently Inaccessible Externally (but Accessible Internally Continuously)

  - by nicorellius

  I have a CRM on a server on a network. We have a static IP and another server outward facing. We use port-forwarding to map to the CRM, so that when you go to the IP or the FQDN, you get to the CRM: xxx.xxx.xxx.xxx crm.example.com Internally, we can access the CRM by going to crm or crm.example.com Lately, I've been noticing that accessing the server from outside the network times out or gives 503, bad gateway. During that time, I can also SSH (different port, so this works) into the outward facing computer and access the server just fine. I have a robot monitoring the site and indeed via HTTP monitoring the site is going down periodically. I looked through the Apache server access and error logs and nothing stuck out at me so I'm a bit confused as to what could be going on. I also searched the access logs for 503 and found nothing. When I run tracert from outside the network, it appears the packets basically make it through the wider area servers (Comcast city and county servers) and end up dropping at the CRM server's front step. I'm tempted to replace the server because it is older and underpowered but it would be nice to know what is going on. Any ideas what to do next?

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• erratic response times with Apache 2.0.52 on redhat 4.

  - by Kevin

  Under load, we've noticed response times from Apache vary greatly for the same 7k image. It can range anywhere from .01 seconds to 25 seconds or greater. Unfortunately, due to corporate policy constraints we are pretty much stuck on Apache 2.0.52. I'm at best an Apache novice so I'm in over my head with this problem. My focus recently has turned to our choice of MPM modules. We use the worker model on a dual core hyper threaded blade. It doesn't appear that swapping is an issue, and I don't see any signs of a hardware problem. I've read that worker is optimal on hardware with many CPU's where prefork it more suitable for our specific hardware profile. I can see conceptually how choosing the wrong MPM could result in this erratic behavior, but I'm not confident that it's the root cause here. Has anyone else seen this type of range in your response times for simple static content? What else should I be looking into here?

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• Windows 7 'Unidentified Network'

  - by Throdne

  So my internet was working last night before I went to bed and woke up to a computer that is showing unidentified network. I have tried multiple ways of fixing it. > route delete 0.0.0.0 > uninstalling drivers - restart - reinstall from downloaded drivers > ipconfig /release - /renew > static IP > speed & duplex from auto negotiation to 1.0gbps full duplex > and also changed my network address to no value to 1234567890ab (not in that order) nothing seems to work. I have Comcast internet and when I connect the computer to the modem it works perfectly. but when I connect it to my router again, Unidentified network. I know my router isn't faulty, because my macbook pro, server, NAS, iPhones, and iPads are still working. I have also tried moving the port on the router, still same problem. my router is a: Cisco Small Business RVS4000 motherboard: GIGABYTE GA-990FXA-UD3

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• If I ssh to a domain provided by dyndns, does my password go through them?

  - by D Connors

  I'm running Ubuntu on my work PC, and my work place provides me with a static IP address but not with a domain. It's sometimes useful for me to connect to that PC through ssh, but it's not common enough for me to instantly remember the IP number. So I set um a dyndns account, and associated a short and intuitive domain name to that IP. Here's my question, when I try to ssh to the domain, it asks me $ ssh [email protected] The authenticity of host 'something.there.foo (xx.xx.xx.xx)' can't be established. RSA key fingerprint is 'ALPHANUMERIC STRING' Are you sure you want to continue connecting (yes/no)? That surprised me a little bit. I have already registered the RSA fingerprint by connecting directly to the IP address. I thought the domain name was simply a convenient way of pointing me in the right direction (i. e. the ip address), but that message makes me think my data is actually going through their servers or something. Which one is it? Am I sending my password through someone else's server? Or is ssh just really really careful, thus warning me even if the final destination is a know host? The ssh server I'm using is the openssh-server package.

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• Routing WIFI and LAN for specific traffic

  - by jakebird451

  I have two network devices aboard my macbook pro: WIFI (en1): Used for general traffic. Connects to an ip of 192.168.19.* via DHCP LAN (en0): Used for specific traffic. Connects to an ip of 192.168.2.10 as a static IP. Does not connect to a router, only a switch for direct routing connection. I have 4 IP addresses I need to access on the LAN: 192.168.2.1 192.168.2.21 192.168.2.20 192.168.2.30 The rest of the traffic needs to go to WIFI. I have tried setting up a routing table for the specific ip addresses, but I only managed to mess up my network. I do not venture out into the world of networking too often, but this was the latest command I have been trying: sudo route add -host 192.168.2.30 -interface en0 This command killed my ability to use ping. It told me that ping could not allocate memory (is that even possible)? It also killed my wifi access. Logging out and back in fixed the issue. I really do not mind to make this solution permanent, so I am fine with a temporary routing.

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• C# SMTP virtual server doesn't send mail [closed]

  - by ragaei

  I have got the following Exception : System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. - System.Runtime.InteropServices.COMException (0x8004020F): The server rejected one or more recipient addresses. The server response was: 550 5.7.1 Unable to relay for [email protected] --- End of inner exception stack trace --- at System.RuntimeType.InvokeDispMethod(String name, BindingFlags invokeAttr, Object target, Object[] args, Boolean[] byrefModifiers, Int32 culture, String[] namedParameters) at System.RuntimeType.InvokeMember(String name, BindingFlags bindingFlags, Binder binder, Object target, Object[] providedArgs, ParameterModifier[] modifiers, CultureInfo culture, String[] namedParams) at System.Type.InvokeMember(String name, BindingFlags, invokeAttr, Binder binder, Object target, Object[] args, CultureInfo culture) at System.Web.Mail.SmtpMail.LateBoundAccessHelper.CallMethod(Type type, Object obj, String methodName, Object[] args) at System.Web.Mail.SmtpMail.LateBoundAccessHelper.CallMethod(Object obj, String methodName, Object[] args) public static void SendEmail(string _FromEmail, string _ToEmail, string _Subject, string _EmailBody) { // setup email header . SmtpMail.SmtpServer = "127.0.0.1"; MailMessage _MailMessage = new MailMessage(); _MailMessage.From = _FromEmail; _MailMessage.To = _ToEmail; _MailMessage.Subject = _Subject; _MailMessage.Body = _EmailBody; try { SmtpMail.Send(_MailMessage); } catch (Exception ex) { if (ex.InnerException != null) { String str = ex.InnerException.ToString(); } } }

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• Verification of downloaded package with rpm

  - by moooeeeep

  I wanted to install a package on CentOS 6 via rpm (e.g., the current epel-release). EDIT: Of course I would always prefer the installation via yum but somehow I failed to get that specific package installed using this normal approach. As such, the EPEL/FAQ recommends Version 2. As I'm downloading the package through an insecure channel (http) I wanted to make sure that the integrity of the file is verified using information that is not provided with the downloaded file itself. Is this especially true for all of these approaches? I've seen various approaches to this on the internet: Version 1 rpm -ivh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-7.noarch.rpm Version 2 rpm -Uvh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-7.noarch.rpm Version 3 wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-7.noarch.rpm rpm --import https://fedoraproject.org/static/0608B895.txt rpm -K epel-release-6-7.noarch.rpm rpm -i epel-release-6-7.noarch.rpm I do not know rpm very well, so I wondered how they might differ? My guess (after reading the manpage) is that the first should only be used when the package is previously not installed, the second would additionally remove previous versions of the package after installation, the first two omit some verification steps before the actual installation that are done by rpm -K. So my main questions at this point are Are my guesses correct or am I missing something? Is the rpm --import ... implicitly done for the first two approaches as well, and if not, isn't it necessary to do so after all? Are these additional checks performed by rpm -K ... any relevant? What is the best (most secure, most reliable, most maintainable, ...) way of installing packages via rpm in general?

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• Nginx Config - I can't access WordPress admin area

  - by WebDevDude

  I am a complete noob when it comes to Nginx, but I'm trying to make the switch over for my WordPress site. Everything works, even the permalink, but I can't access my WordPress admin directory (I get a 403 error). I have my WordPress install in a subfolder, so that complicates things a bit for me. Here is my Nginx config file: server { server_name mydomain.com; access_log /srv/www/mydomain.com/logs/access.log; error_log /srv/www/mydomain.com/logs/error.log; root /srv/www/mydomain.com/public_html; location / { index index.php; # This is cool because no php is touched for static content. # include the "?$args" part so non-default permalinks doesn't break when using query string try_files $uri $uri/ /index.php?$args; } location /myWordpressDir { try_files $uri $uri/ /myWordpressDir/index.php?$args; } location ~ \.php$ { include /etc/nginx/fastcgi_params; fastcgi_pass 127.0.0.1:9000; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME /srv/www/mydomain.com/public_html$fastcgi_script_name; fastcgi_split_path_info ^(/myWordpressDir)(/.*)$; } location ~* ^.+\.(ogg|ogv|svg|svgz|eot|otf|woff|mp4|ttf|rss|atom|jpg|jpeg|gif|png|ico|zip|tgz|gz|rar|bz2|doc|xls|exe|ppt|tar|mid|midi|wav|bmp|rtf)$ { access_log off; log_not_found off; expires max; } }

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• Help with routing table

  - by user68752

  I have tried to find the answer to my question but not really found a clean and easy solution. I have a box (Ubuntu headless 10.04.1 server, with one Ethernet port) on LAN behind a router (running m0n0wall), that I have successfully installed a PPTP device (ppp0) on, this is working flawlessly (following this link) The thing is I want this box to route all it's internet traffic through the VPN tunnel (ppp0 device) but also being able to access the local LAN on 192.168.1.* subnet. I've succeeded a bit with this, but my problem right now is that I have port forwards (e.g. SSH) done in the m0n0wall pointing to this specific box which forces me to do "add routes" to all boxes that want to access this machine through this specific port. For instance a machine with ip xyz.xyz.xyz.xyz needs to have a static route setup in the routing table on the box to be able to access the box. This is the result of route -n xxx.xxx.137.2 192.168.1.1 255.255.255.255 UGH 0 0 0 eth0 xxx.xxx.137.2 0.0.0.0 255.255.255.255 UH 0 0 0 ppp0 192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 yyy.yyy.0.0 192.168.1.1 255.255.0.0 UG 0 0 0 eth0 0.0.0.0 0.0.0.0 0.0.0.0 U 0 0 0 ppp0 Where xxx is the IPs provided from VPN server. yyy.yyy.0.0 is a net that i want to have access to the box, without this I can't access the box from outside the LAN (via port-forwards done in router software, m0n0wall) is there away round this ugly solution?

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• OpenVPN + iptables / NAT routing

  - by Mikeage

  I'm trying to set up an OpenVPN VPN, which will carry some (but not all) traffic from the clients to the internet via the OpenVPN server. My OpenVPN server has a public IP on eth0, and is using tap0 to create a local network, 192.168.2.x. I have a client which connects from local IP 192.168.1.101 and gets VPN IP 192.168.2.3. On the server, I ran: iptables -A INPUT -i tap+ -j ACCEPT iptables -A FORWARD -i tap+ -j ACCEPT iptables -t nat -A POSTROUTING -s 192.168.2.0/24 -o eth0 -j MASQUERADE On the client, the default remains to route via 192.168.1.1. In order to point it to 192.168.2.1 for HTTP, I ran ip rule add fwmark 0x50 table 200 ip route add table 200 default via 192.168.2.1 iptables -t mangle -A OUTPUT -j MARK -p tcp --dport 80 --set-mark 80 Now, if I try accessing a website on the client (say, wget google.com), it just hangs there. On the server, I can see $ sudo tcpdump -n -i tap0 tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on tap0, link-type EN10MB (Ethernet), capture size 96 bytes 05:39:07.928358 IP 192.168.1.101.34941 > 74.125.67.100.80: S 4254520618:4254520618(0) win 5840 <mss 1334,sackOK,timestamp 558838 0,nop,wscale 5> 05:39:10.751921 IP 192.168.1.101.34941 > 74.125.67.100.80: S 4254520618:4254520618(0) win 5840 <mss 1334,sackOK,timestamp 559588 0,nop,wscale 5> Where 74.125.67.100 is the IP it gets for google.com . Why isn't the MASQUERADE working? More precisely, I see that the source showing up as 192.168.1.101 -- shouldn't there be something to indicate that it came from the VPN? Edit: Some routes [from the client] $ ip route show table main 192.168.2.0/24 dev tap0 proto kernel scope link src 192.168.2.4 192.168.1.0/24 dev wlan0 proto kernel scope link src 192.168.1.101 metric 2 169.254.0.0/16 dev wlan0 scope link metric 1000 default via 192.168.1.1 dev wlan0 proto static $ ip route show table 200 default via 192.168.2.1 dev tap0

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• PFSence VPN Routing

  - by SvrGuy

  We use PFSense firewalls at three installations with the following LAN networks: 1.) Datacenter #1: 10.0.0.0/16 2.) Datacenter #2: 10.1.0.0/16 3.) HQ: 10.2.0.0/16 All of these locations are linked via an IPSEC tunnel that works properly. Hosts in any of the above networks can communicate with hosts in any other of the above networks. Now, for our laptops etc. we established a road warrior network 10.3.0.0/16 and have implemented OpenVPN to link the laptops etc. to Datacenter #1. This works great too, so our laptops can connect and communicate with any host in Datacenter #1 (anything on 10.0.0.0/16) The problem is the laptops can't communicate with any hosts that Datacenter #1 can reach by its IPSEC tunnel to Datacenter #2 (and/or the HQ for that matter). Does anyone know what to do configuration wise on the PFSense box in Datacenter #1 to configure to route packets received on the OpenVPN tunnel to Datacenter #2 over the IPSEC tunnel? It could be a setting on the OpenVPN or some sort of static route or some such. Any ideas?

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• Running Solr on VPS problem

  - by Camran

  I have a VPS with Ubuntu OS. I run solr om my local machine (windows xp laptop) just fine. I have configured Jetty, and Solr just the same way as on my computer, but on the server. I have also downloaded the JRE and installed it on the server. However, whenever I try to run the start.jar file, the PuTTY terminal shows a bunch of text but gets stuck. I could pase the text here but it is very long, so unless somebody wants to see it I wont. Also, I cant view the solr admin page at all. Does anybody have experience in this kind of problem? Maybe java isn't correctly installed? It is a VPS so maybe installation is different. Thanks UPDATE: These are the last lines from the terminal, in other words, this is where it stops every time: INFO: [] webapp=null path=null params={event=firstSearcher&q=static+firstSearcher+warming+query+from+solrconfig.xml} hits=0 status=0 QTime=9 May 28, 2010 8:58:42 PM org.apache.solr.core.QuerySenderListener newSearcher INFO: QuerySenderListener done. May 28, 2010 8:58:42 PM org.apache.solr.handler.component.SpellCheckComponent$SpellCheckerListener newSearcher INFO: Loading spell index for spellchecker: default May 28, 2010 8:58:42 PM org.apache.solr.core.SolrCore registerSearcher INFO: [] Registered new searcher Searcher@63a721 main Also you should know that I installed jetty by just dragging the folders from my HD to the VPS server.

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• Developing high-performance and scalable zend framework website

  - by Daniel

  We are going to develop an ads website like http://www.gumtree.com/ (it will not be like this one but just to give you an ideea) and we are having some issues regarding performance and scalability. We are planning on using Zend Framework for this project but this is all that I'm sure off at this point. I don't think a classic approch like Zend Framework (PHP) + MySQL + Memcache + jQuery (and I would throw Doctrine 2 in there to) will fix result in a high-performance application. I was thinking on making this a RESTful application (with Zend Framework) + NGINX (or maybe MongoDB) + Memcache (or eAccelerator -- I understand this will create problems with scalability on multiple servers) + jQuery, a CDN for static content, a server for images and a scalable server for the requests and the rest. My questions are: - What do you think about my approch? - What solutions would you recommand in terms of servers approch (MySQL, NGINX, MongoDB or pgsql) for a scalable application expected to have a lot of traffic using PHP?...I would be interested in your approch. Note: I'm a Zend Framework developer and don't have to much experience with the servers part (to determin what would be best solution for my scalable application)

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• Debian: Unable to mount a second drive as a subdirectory inside of another partition.

  - by jkndrkn

  Hello. I have the following /etc/fstab: # /etc/fstab: static file system information. # # <file system> <mount point> <type> <options> <dump> <pass> proc /proc proc defaults 0 0 /dev/md1 / ext3 defaults,errors=remount-ro 0 1 /dev/md0 /boot ext3 defaults 0 2 /dev/md5 /home ext3 defaults 0 2 /dev/md3 /opt ext3 defaults 0 2 /dev/md6 /tmp ext3 defaults 0 2 /dev/md2 /usr ext3 defaults 0 2 /dev/md4 /var ext3 defaults 0 2 /dev/md7 none swap sw 0 0 /dev/sdc /home/httpd ext3 defaults 0 2 /dev/hda /media/cdrom0 udf,iso9660 user,noauto 0 0 /dev/sdc1 /mnt/usb/backup-1 auto defaults 0 0 I am unable to get /dev/sdc/ to mount at /home/httpd/ on reboot. The /home/httpd/ directory exists. Mounting via mount -t ext3 /dev/sdc /home/httpd works just fine. Mounting via mount -a generates the following error message: mount: you must specify the filesystem type This is, incidentally, the same message that I see while booting. The error message goes away if I comment out the line in fstab starting with /dev/sdc.

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• How to deal with ssh's "WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!"?

  - by Vi.

  I often need to login to multiple remote stations that are just placed to the same static IPs for me. SSH complains about changed keys in this case: $ ssh [email protected] @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ ... Offending RSA key in /home/vi/.ssh/known_hosts:70 ... I usually just run vim /home/vi/.ssh/known_hosts +70, dd wq and re-run the SSH command. How to do it simpler? Requirements: The warning should be displayed, and not like this: The authenticity of host '172.1.2.3 (172.1.2.3)' can't be established. It is easy to accept the key change. I expect something like this: $ ssh [email protected] @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ ... The fingerprint for the RSA key sent by the remote host is 82:cd:be:7a:ae:1b:91:2c:23:c1:74:4d:8a:38:10:32. Change the host key in /home/vi/.ssh/known_hosts (yes/no)? yes Warning: Changed host key for '172.1.2.3' (RSA) in the list of known hosts. [email protected]'s password: Simple and differs from usual "The authenticity of host can't be established." message.

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• Open ports broken from internal network

  - by ksvi

  Quick summary: Forwarded port works from the outside world, but from the internal network using the external IP the connection is refused. This is a simplified situation to make the explanation easier: I have a computer that is running a service on port 12345. This computer has an internal IP 192.168.1.100 and is connected directly to a modem/router which has internal IP 192.168.1.1 and external (public, static) IP 1.2.3.4. (The router is TP-LINK TD-w8960N) I have set up port forwarding (virtual server) at port 12345 to go to port 12345 at 192.168.1.100. If I run telnet 192.168.1.100 12345 from the same computer everything works. But running telnet 1.2.3.4 12345 says connection refused. If I do this on another computer (on the same internal network, connected to the router) the same thing happens. This would seem like the port forwarding is not working. However... If I run a online port checking service on my external IP and the service port it says the port is open and I can see the remote server connecting and immediately closing connection. And using another computer that is connected to the internet using a mobile connection I can also use telnet 1.2.3.4 12345 and I get a working connection. So the port forwarding seems to be working, however using external IP from the internal network doesn't. I have no idea what can be causing this, since another setup very much like this (different router) works for me. I can access a service running on a server from inside the network both through the internal and external IP.

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• Cron job checking for changes in Git repository

  - by HNygard

  We have just moved our server configs to a Git repository. Therefore there should not be any changes in any of the repository folders. I was thinking about how I could set up a cron job to check for any uncommited changes. How could a cron job be set up to check for changes in a Git repository? Greping the output of the git status command might just do it. Grep and cron jobs are not my strong side. Here are some sample outputs from git status: Standing the folder containing the git repository (e.g. /path/gitrepo/) with changed files: $ git status # On branch master # Changes not staged for commit: # (use "git add <file>..." to update what will be committed) # (use "git checkout -- <file>..." to discard changes in working directory) # # modified: apache2/sites-enabled/000-default # # Untracked files: # (use "git add <file>..." to include in what will be committed) # # apache2/conf.d/test no changes added to commit (use "git add" and/or "git commit -a") Standing in the folder when there is no changes: $ git status # On branch master nothing to commit (working directory clean) Update: Synced up with origin is not important. There should be no local changes. Local files that must be in place go into the .gitignore file. In addition to the server configs there are also git repos for content (static web sites, web apps, wordpress, etc). None of the repositories should have local changes. We might use Puppet in the long run since its being used for development of one of the web apps.

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• How can I generate filesystem images that are usable on many different virtualization systems?

  - by Mark Longair

  I have written a script that generates a root filesystem image (based on Debian lenny) suitable for User-Mode Linux. (Essentially this script creates a filesystem image, mounts it with a loop device, uses debootstrap to create a lenny install, sets up a static IP for TUN/TAP networking, adds public keys for login by SSH and installs a web application.) These filesystem images work pretty well with UML, but it would be nice to be able to generate similar images that people can use on alternative virtualization software, and I'm not familiar with these options at all. In particular, since the idea is to use this image as a standalone server for testing the web application, it's important that the networking works. I wonder if anyone can suggest what would be involved in customizing such root filesystem images such that they could be used with other virtualization software, such as VMware, Xen or as an Amazon EC2 instance? Two particular concerns are: If such systems don't use a raw filesystem image (e.g. they need headers with metadata or are compressed in some particular way) do there exist tools to convert between the different formats? I assume that in the filesystem, at least /etc/network/interfaces will have to be customized, but are more involved changes likely to be necessary? Many thanks for any suggestions...

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• Unexpected behaviour in a Lotus Notes programmable table

  - by Mark B

  I'm designing a workflow database in Lotus Notes 6.0.3 (soon upgrading to 8.5), and my OS is Windows XP. I have recently tried converting a tabbed table into a programmable one. This was so that I could control which tab was displayed to the user when it was opened, so that they were presented with the most appropriate one for that document's progress through the workflow. That part of it works! One of the tabs features a radio button that controls visibility of the next tab, and a pair of cascading dialogue boxes. One contains the static list "Person":"Team", and the other has a formula based on the first: view:=@If(PeerReview = "Team"; "GroupNames"; "GroupMembers"); @Unique(@DbColumn(""; ""; view; 1)) The dialogue boxes have the property "Refresh fields on keyword change" selected. The behaviour that I wasn't expecting is this. If the radio button is set to "Yes" and a value is selected in one of the dialogue boxes, the table opens the next tab. If the radio button is set to "No" and a value is selected in one of the dialogue boxes, the entire table is hidden. I can duplicate the latter by switching off the "Refresh fields on keyword change" property on the dialogue boxes and instead pressing F9 after selecting a value. I have no idea why the former occurs, though. The table is called "RFCInfo", and I have a field on the form called "$RFCInfo" which is editable, hidden from all users who aren't me and initially set by a Postopen script, which I can post if necessary - it's essentially a Select Case statement that looks at a particular item value and returns the name of the table row relating to that value. Can anyone offer any pointers?

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• How do I setup routing for two companies with different Internet connections on the same LAN?

  - by Clint Miller

  Here's the setup: Two companies (A & B) share office space and a LAN. A 2nd ISP is brought in and company A wants its own Internet connection (ISP A) and company B wants its own Internet connection (ISP B). VLANs are deployed internally to separate the two companies' networks (company A: VLAN 1, company B: VLAN 2, shared VOIP: VLAN 3). With separate VLANs it's simple enough to use separate DHCP servers (or separate scopes on the same server) to assign the default gateway to each company's gateway for their Internet connection. Static routes can be created on each gateway to point traffic destined for the other company's VLAN or the voice VLAN so that all nodes are reachable as expected. However, I think this is a form of asymmetrical routing, right? (The path from node A1 to node B1 is not the same as the path back from node B1 to node A1). Can I set up policy-based routing to correct this? In that case, can I assign the same default gateway to every device on all VLANs and create a routing policy on a L3 switch to look at the source address and forward traffic to the appropriate next hop? In that case, I want the routing logic to go like this: If the destination address is known, forward the traffic (traffic destined for a different VLAN). If the destination address is unknown, forward the traffic to ISP A's gateway if the source address is on VLAN A; or forward the traffic to ISP B's gateway if the source address is VLAN B. Am I thinking about this problem in the correct way? Is there another way to solve this problem that I am overlooking?

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• visually documenting web server configuration and infrastructure

  - by Alex Ciarlillo

  I have just finished a large re-organization and update of our institutions web server(s). This server hosts 3 virtual hosts, 3-4 blogs, 2 wikis, some legacy static HTML pages, and many hosted documents (PDF, .jpg, .xls). I have organized the site into a structure of something like: /var/www/sites/vhost1, vhost2, vhost3 .../wordpress/blogX .../mediawiki/wikiX Data is in a seperate directory structure so I can run a cron task over it to make sure it is all writeable and such. I then symlink to these data directories for each application. /var/www/data/vhost1, vhost2, vhost3 .../wordpress/blogX/uploads .../mediawiki/wikiX/images All Apache configs are in /etc/httpd/conf.d/vhosts.d/vhost1,2,3.conf On top of this there is also a testing server which mirrors this setup. Once changes are fully tested, they are rsynced down to the live server. All the wordpress installs and mediawiki installs are straight form SVN and updates are done by switching branches or "svn up". So my question is how can I best document to share with a) co-workers, b) possible future replacement, c) myself 6 months from now. Obviously I can make a wiki page, excel document, whatever and fill it with text, but I am looking for a more visual representation that I can use to explain the architecture to less-technical people. Ideally it would be awesome if this visual representation could then be expanded to get more technical details.

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