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  • Sending UDP/514 data magically appears in syslog without rsyslog running

    - by ale
    I’m using a programming language without a library to log to rsyslog over UDP. I thought I was going to need to write a library but I discovered something weird. If I send data on UDP/514 with the port open on the server then the data appears in the server’s syslog. rsyslogd isn’t running so syslog isn’t doing this. Data doesn’t get formatted into a syslog message so rsyslogd really isn’t doing this (only raw text enters syslog). Linux must see the data coming in on this port and know that it should go into /var/log/messages? If I do the same on another port (e.g. UDP/515) then nothing appears in the log! What is doing this? Some CentOS feature? The kernel?

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  • ASP.NET MVC: Have total control over the URL

    - by Luke101
    Hello, I am developing a website that has nested categories. I would like the categories to be in the url such as something like this http://www.dmoz.org/Computers/Programming/Component_Frameworks/NET/Chats_and_Forums/ as you can see in the above url the categories are in the url itself. How can I develop something like this in asp.net mvc?

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  • OpenVPN and PPTP on XEN VPS

    - by amiv
    I have Debian based system (Ubuntu 11.10) on XEN VPS. I've installed OpenVPN and works great. I need to install PPTP too, so did it and clients can connect, but they have no internet on client side. If I connect to VPN over PPTP I can ping and access to only my VPS by its IP, but ony that. There's no "internet" on client side. It looks it's not DNS problems (I'm using 8.8.8.8) because I can't ping known IPs. I bet the solution is simple, but don't have any idea. Any guess? /etc/pptpd.conf option /etc/ppp/pptpd-options logwtmp localip 46.38.xx.xx remoteip 10.1.0.1-10 /etc/ppp/pptpd-options name pptpd refuse-pap refuse-chap refuse-mschap require-mschap-v2 require-mppe-128 ms-dns 8.8.8.8 ms-dns 8.8.4.4 proxyarp nodefaultroute lock nobsdcomp /etc/ppp/ip-up [...] ifconfig ppp0 mtu 1400 /etc/sysctl.conf [...] net.ipv4.ip_forward=1 Command which I run: iptables -t nat -A POSTROUTING -j SNAT --to-source 46.38.xx.xx (IP of my VPS) The client can connect, first one gets IP 10.1.0.1 and DNS from Google. I bet it's iptables problem, am I right? I'm iptables noob and I don't have idea what's wrong. And here's the ifconfig and route command before client connect via PPTP: root@vps3780:~# route Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface default xx.xx.tel.ru 0.0.0.0 UG 100 0 0 eth0 10.8.0.0 10.8.0.2 255.255.255.0 UG 0 0 0 tun0 10.8.0.2 * 255.255.255.255 UH 0 0 0 tun0 46.38.xx.0 * 255.255.255.0 U 0 0 0 eth0 root@vps3780:~# ifconfig eth0 Link encap:Ethernet HWaddr 00:16:3e:56:xx:xx inet addr:46.38.xx.xx Bcast:0.0.0.0 Mask:255.255.255.0 inet6 addr: fe80::216:xx:xx:dfb6/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:22671 errors:0 dropped:81 overruns:0 frame:0 TX packets:2266 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:1813358 (1.8 MB) TX bytes:667626 (667.6 KB) Interrupt:24 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:100 errors:0 dropped:0 overruns:0 frame:0 TX packets:100 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:10778 (10.7 KB) TX bytes:10778 (10.7 KB) tun0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 inet addr:10.8.0.1 P-t-P:10.8.0.2 Mask:255.255.255.255 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1 RX packets:602 errors:0 dropped:0 overruns:0 frame:0 TX packets:612 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:100 RX bytes:90850 (90.8 KB) TX bytes:418904 (418.9 KB) And here's the ifconfig and route command after client connect via PPTP: root@vps3780:~# route Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface default xx.xx.tel.ru 0.0.0.0 UG 100 0 0 eth0 10.1.0.1 * 255.255.255.255 UH 0 0 0 ppp0 10.8.0.0 10.8.0.2 255.255.255.0 UG 0 0 0 tun0 10.8.0.2 * 255.255.255.255 UH 0 0 0 tun0 46.38.xx.0 * 255.255.255.0 U 0 0 0 eth0 root@vps3780:~# ifconfig eth0 Link encap:Ethernet HWaddr 00:16:3e:56:xx:xx inet addr:46.38.xx.xx Bcast:0.0.0.0 Mask:255.255.255.0 inet6 addr: fe80::216:xx:xx:dfb6/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:22989 errors:0 dropped:82 overruns:0 frame:0 TX packets:2352 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:1841310 (1.8 MB) TX bytes:678456 (678.4 KB) Interrupt:24 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:112 errors:0 dropped:0 overruns:0 frame:0 TX packets:112 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:12102 (12.1 KB) TX bytes:12102 (12.1 KB) ppp0 Link encap:Point-to-Point Protocol inet addr:46.38.xx.xx P-t-P:10.1.0.1 Mask:255.255.255.255 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1400 Metric:1 RX packets:66 errors:0 dropped:0 overruns:0 frame:0 TX packets:15 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:3 RX bytes:10028 (10.0 KB) TX bytes:660 (660.0 B) tun0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 inet addr:10.8.0.1 P-t-P:10.8.0.2 Mask:255.255.255.255 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1 RX packets:602 errors:0 dropped:0 overruns:0 frame:0 TX packets:612 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:100 RX bytes:90850 (90.8 KB) TX bytes:418904 (418.9 KB) And ugly iptables --list output: root@vps3780:~# iptables --list Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED ACCEPT all -- 10.8.0.0/24 anywhere REJECT all -- anywhere anywhere reject-with icmp-port-unreachable ACCEPT all -- 10.1.0.0/24 anywhere ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED ACCEPT all -- 10.1.0.0/24 anywhere REJECT all -- anywhere anywhere reject-with icmp-port-unreachable ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED ACCEPT all -- 10.8.0.0/24 anywhere REJECT all -- anywhere anywhere reject-with icmp-port-unreachable And ugly iptables -t nat -L output: root@vps3780:~# iptables -t nat -L Chain PREROUTING (policy ACCEPT) target prot opt source destination Chain INPUT (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination Chain POSTROUTING (policy ACCEPT) target prot opt source destination SNAT all -- 10.8.0.0/24 anywhere to:46.38.xx.xx MASQUERADE all -- 10.1.0.0/24 anywhere SNAT all -- 10.1.0.0/24 anywhere to:46.38.xx.xx SNAT all -- 10.8.0.0/24 anywhere to:46.38.xx.xx SNAT all -- 10.1.0.0/24 anywhere to:46.38.xx.xx MASQUERADE all -- anywhere anywhere SNAT all -- anywhere anywhere to:46.38.xx.xx SNAT all -- 10.8.0.0/24 anywhere to:46.38.xx.xx MASQUERADE all -- anywhere anywhere MASQUERADE all -- 10.1.0.0/24 anywhere MASQUERADE all -- anywhere anywhere MASQUERADE all -- 10.1.0.0/24 anywhere As I said - OpenVPN works very good. 10.8.0.0/24 for OpenVPN (on tun0). PPTP won't work. 10.1.0.0/24 for PPTP (on ppp0). Clients can connect, but they haven't "internet". Any suggestions will be appreciated. Second whole day fighting with no results. EDIT: iptables -t filter -F - it resolved my problem :-)

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  • How can I learn to set up a build process?

    - by Satoru.Logic
    Hi, all. What I was taught at school is all about programming languages, software design, but hardly anything about how to automatically build a software, probably with unit testing integrated. Please tell me how do one start learning to set up a build process for his project.

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  • How to install Mac OS X Snow Leopard server on any virtual machine with DMG?

    - by Eonil
    I'm trying to install Mac OS X Snow Leopard Server on VirtualBox. I know this is duplicated question, however another questions have no fine answer. I'm trying to install on VirtualBox on iMac. So this is pretty legal. But the problem is I want to install with DMG image. Because installing DVD drive is too slow, and I have to install Mac OS X many times. And taking DVD disc from box is annoying too. But VirtualBox fails installing. It couldn't load kernel. It installs well with DVDs. Is there any way to do this? I'm considering using other VM solutions like Parallels or VMWare if they can support install from DMG images well. If you know about them certainly, please let me know.

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  • MonoTouch - has anyone used this?

    - by Jonesy
    Hi folks, I'm a .NET developer trying to make the leap into objective-c iPhone programming. I created my first app - just a simple portfolio with multiple xibs. I've just come across MonoTouch which lets you develop iPhone apps in C# or .NET. Has anyone tried this out? I'd be interested to know people opinions on it. Cheers, Jonesy

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  • Experimental IDE concepts

    - by efbenson
    I am interesting and building a new style IDE for a side project. Mainly to do away with the normal notepad on steroids IDE. I am looking for some inspiration for things that have been tried or that you have seen (or not) that looked cool and would be useful to have in an IDE. Things that I can up with are: http://digitaltools.node3000.com/blog/1052-field-experimental-programming-suite http://www.cs.brown.edu/people/acb/codebubbles_site.htm

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  • cannot access new drive through nfs

    - by l.thee.a
    I am running nfs-kernel-server to access my files on my linux machine(ubuntu - /share). The disk I have been using is full. So I have added a new disk and mounted it to /share/data. My other pc mounts the /share folder to /mnt/nfs; but cannot see the contents of /mnt/nfs/data. I have tried adding /share/data to /etc/exports, but it did not help. What do I do? PS: I am looking for another solution than explicitly mounting /share/data on the second drive.

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  • Hyper-V Ubuntu 10.04, Filesystem suddenly becomes Read-Only?

    - by Daniel Upton
    We are running a Ubuntu 10.04 VM on a Hyper-V system, The VM is dedicated to running one of our web applications. We have enabled the Hyper-V drivers in /etc/initramfs-tools/modules like so: hv_vmbus hv_storvsc hv_blkvsc hv_netvsc And updated the kernel image like so: $ update-initramfs -u And all was good... until.. This morning i got a support request that our web application was throwing an error 500, so i checked the logs and nothing was there. Then I remembered that I had seen this on another of our ubuntu servers so I... $ touch foo.txt And my suspicions were confirmed: touch: cannot touch `foo.txt': Read-only file system Why is the filesystem randomly becoming readonly? Is this only in Ubuntu on HV? Is it a problem on RedHat or Cent?

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  • how to add Continue String Sign like "..." in TextView?

    - by UMMA
    if i add string in a TextView for example, this is my string and TextView max length is 4 It should look like in activity this... or t... that means string continue sign at the end of assigned string if string size is bigger than Max length. Can any one guide me what should i do or i will have to manually add "..." at the end of string through programming. Any help would be appreciated.

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  • Xenserver boot error

    - by Adrian
    I'm trying to get Xenserver 5.5 running on a spare computer here, hardware specs: Intel Q6600, 4GB Ram, and Gigabyte GA-P35-DS3R motherboard Xenserver itself installs fine onto a 150GB sata hdd, however it fails to boot whatsoever, giving this garbled mess: http://img697.imageshack.us/img697/9918/biosi.jpg it's not frozen because if I press enter it just prints a different garble and it also says "could not find kernel image". The strangest thing is if I put that hdd in my desktop and assign it to a VMWare desktop vm (under the ESX profile no less) it boots perfectly... leading me to believe there are no problems with the install or the hdd itself. From what I can tell the error seems to be occuring completely seperately to Xenserver, in the bootloader extlinux?. If there was a motherboard compatibility issue I would think it would also have manifested during installation, and the fact the problem seems to be with the booting into Xen makes me doubt this. Any ideas guys? (I'm using Xen because it can do PCI passthrough without VT-d.)

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  • google sitemap generator installation selinux

    - by adnan
    when i trying to install google sitemap generator i received this error Change security context of to system_u:object_r:httpd_modules_t install: WARNING: ignoring --context (-Z); this kernel is not SELinux-enabled Program files successfully copied. ./install.sh: line 488: 14284 Segmentation fault "$DEST_DIR/$BIN_DIR/$DAEMON_BIN" update_setting $update_setting_flags "apache_conf=$APACHE_CONF" "apache_group=$APACHE_GROUP" > /dev/null after choosing the submiting file settings i tried to unistall it & excute this getenforce try again but the same problem when i enter this dir /etc/sysconfig/selinux. it is not contain the selinux file my os centos 6 X86_64

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  • Recording a screencast of an Android app using the emulator

    - by hgpc
    Unlike the iPhone simulator, the Android emulator doesn't look like an Android device. If you have to create a screencast or promotional video of your Android application, the default skin of the emulator is no good. Is there any way to configure the emulator to look like an Android device? If you have dealt with this already, what other things do you recommend taking into account to record an emulator screencast? Not a programming question per se, but an useful question for Android developers.

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  • Select and delete selected

    - by Donator
    I am programming something like e-mail for my users. I want to allow people to select letters and delete selected. How can I do it? I can't imagine how can I do it only with one MySQL query. Is it even possible?

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  • Report Generator using templates

    - by well son
    Hi all I'd like to a suitable programming language/software that I can use to generate a report of PDF/DOC using a template of my choice. As I currently have to manually edit, add things in report, I like to automate it by softwares. Thank you.

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  • Is memory leak caused by global variables?

    - by user297535
    When I checked my application for memory leaks it is showing 12 leaks. What will be the effect of this? I used global variables as shown below #import "file1.m" int num; #import "file2.m" extern int num; num = 10; Can this cause memory leaks? Anyone please help. I am a beginner in programming.

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  • udhcpc doesn't assign ip address

    - by Diab
    i have a board running linux 2.6.28 and i have one Ethernet interface (eth0) i want dhcp to assign dynamic ip to this interface. i have busybox with udhcpc in the file system and the kernel has the "Pack Socket" enabled so i copied the scripts from "busybox-1.14.1/examples/udhcp" to my board on "/etc/udhcpc/" (i created this directory) and when i run : ifconfig eth0 up the interface is up but without ip address, then running udhcpc -i eth0 -s /etc/udhcpc/sample.script i get the following: note : sample.script contains : "exec /etc/udhcpc/sample.$1" # udhcpc -i eth0 -s /etc/udhcpc/sample.script udhcpc (v1.14.1) started Sending discover... Sending select for 192.168.10.198... Lease of 192.168.10.198 obtained, lease time 691200 but when i check with ifconfig i can see that it didn't assign the ip address to eth0. anyone have an idea why udhcpc didn't assign the ip ? Thanx

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  • Should I upgrade my LinkSys WRT54GL firmware?

    - by Reid
    I have a LinkSys WRT54GL v1.1 which currently has stock firmware version 4.30.7. I see that version 4.30.14 is available. The router works fine now, and the release notes look uninteresting except for one line in v4.30.9: "Resolves issue with Linux kernel vulnerability". I have remote management turned off. I'm aware of the 3rd-party firmwares but the stock firmware works fine for me at the moment, so I don't have an interest in those. Is the status quo fine or should I upgrade the firmware? (It's a bit of a pain since the config has to be saved and reloaded, and obviously any mucking with firmware is risky.)

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  • When would you put a semicolon after a method closing brace?

    - by froadie
    I've been programming in Java for a while, and I've just come across this syntax for the first time: public Object getSomething(){return something;}; What's interesting me is the final semicolon. It doesn't seem to be causing a compiler error, and as far as I know isn't generating runtime errors, so it seems to be valid syntax. When would I use this syntax? Or is it just something that is allowed but generally not used?

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  • jumping lines in a file using c

    - by Nadav Stern
    hello i am trying to sort a textual file using c programming language, in order to sort the file i am using a unique key, i need to be able to jump from line to line in order to sort the file , the problem is that i do not know if there is a command in c which let me jump from the first line to lets say the 20 line for example the only solution which i know for it is to use each time fscanf with a loop but this solution is not very effective thanks in advance for your time.

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  • How did you learn to program?

    - by Agusti-N
    I would like to know how you learned to program in order to teach future programmers. Could recommend some books to teach programming,or some helpful tips? Edit : How to motivate students to continue learning?

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  • Full HD video playback acceleration with mplayer on Ubuntu Lucid

    - by pts
    I know that for an NVidia card I can sudo apt-get install nvidia-current mplayer, reboot, and then use mplayer -vo vdpau -vc ffmpeg12vdpau,ffwmv3vdpau,ffvc1vdpau,ffh264vdpau FILE.mkv to get accelerated video playback of H.264 and other codecs, so even full HD videos can be played back with only little CPU. (And there are many other options, e.g. XBMC also supports VDPAU.) But how do I get accelerated video playback if I have a recent ATI or Intel video card on Ubuntu Lucid? How do I figure out if my video card has acceleration built in? The solution has to work with mplayer or mplayer2. It's OK for me to recompile mplayer(2), but I'd prefer installing both the kernel and the X.org X server from a binary package repository.

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