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• CentOS Can't connect to FTP

  - by Steven

  I'm having troubles connecting to my ftp server. Here's what it says, Status: Connected Status: Retrieving directory listing... Command: PWD Response: 257 "/home/sxxxn" Command: TYPE I Response: 200 Switching to Binary mode. Command: PASV Error: Connection timed out Error: Failed to retrieve directory listing My vsftpd.conf file: local_enable=YES write_enable=YES local_umask=022 dirmessage_enable=YES xferlog_enable=YES connect_from_port_20=YES ftpd_banner=Welcome to xxxx.com xferlog_std_format=NO chroot_local_user=NO chroot_list_enable=NO chroot_list_file=/etc/vsftpd/chroot_list listen=YES pasv_enable=YES pasv_min_port=3000 pasv_max_port=3050 pasv_address=64.xx.xx.xxx pam_service_name=vsftpd userlist_enable=YES userlist_deny=NO userlist_file=/etc/vsftpd/vsftpd.userlist And I've got these 2 in my iptables -A INPUT -p tcp -m tcp --dport 21 -j ACCEPT -A INPUT -p tcp -m tcp --dport 3000:3050 -j ACCEPT I've also disabled selinux.

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• apache port number

  - by user983223

  For each development sites I want to have a unique port number. For instance, domain.com:1234 This is what I have in my httpd.conf file. After restart the page domain.com:1234 is not showing in the browser. Is there anything else that I need to do besides what I have already done to make this work? Listen *:1234 <VirtualHost *:1234> DocumentRoot /var/www/dev_sites/test ServerName domain.com:1234 </VirtualHost> It looks like if I go to my local hostname (kk.local:1234) it shows. Is there some sort of dns that I need to do? I really don't want to go into godaddy everytime I add a development site. Is there a way around that?

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• Does nginx auth_basic work over HTTPS?

  - by monde_

  I've been trying to setup a password protected directory in a SSL website as follows: /etc/nginx/sites-available/default server { listen 443: ssl on; ssl_certificate /usr/certs/server.crt; ssl_certificate_key /usr/certs/server.key; server_name server1.example.com; root /var/www/example.com/htdocs/; index index.html; location /secure/ { auth_basic "Restricted"; auth_basic_user_file /var/www/example.com/.htpasswd; } } The problem is when I try to access the URL https://server1.example.com/secure/, I get a "404: Not Found" error page. My error.log shows the following error: 011/11/26 03:09:06 [error] 10913#0: *1 no user/password was provided for basic authentication, client: 192.168.0.24, server: server1.example.com, request: "GET /secure/ HTTP/1.1", host: "server1.example.com" However, I was able to setup password protected directories for a normal HTTP virtual host without any problems. Is it a problem with the config or something else?

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• Fresh install of nginx causes browser to download index.html instead of opening it

  - by 010110110101

  When I view this in Chrome, http://localhost:90 the file is downloaded instead of displayed in Chrome. This question has been asked a lot of times on SO, but about index.php files. My problem is a plain jane HTML file, not a PHP file. That hasn't been asked yet. I was hoping the solution would be similar, but I haven't been able to figure it out. Here's my example.com.conf: server { server_name localhost; listen 90; root /var/www/example.com/html index index.html location / { try_file $uri $uri/ =404; } } My index.html file contains only two words, no markup Hello World I think it's the mime.types. The mime.types file has the entry for html in it. This is a fresh nginx install. nginx -t reports "test is successful"

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• Why does sub_filter seem to not work when used in conjunction with proxy_pass?

  - by kylehayes

  Given the following configuration of nginx: server { listen 80; server_name apilocal; sub_filter "apiupstream/api" "apilocal"; sub_filter_once off; location /people/ { proxy_pass http://apiupstream/api/people/; proxy_set_header Accept-Encoding ""; } } Sub_filter does not properly response parts of the response. Once I remove proxy_pass from the configuration, it works properly. A lot of folks with this problem end up having gzip compression from the upstream server. I've verified that my upstream server does not have gzip encoding turned on for its responses. But just in case, I've also used the proxy_set_header above to not accept gzip. Is there potentially something else I'm missing?

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• Roll standalone JBoss app under Tomcat

  - by Seva Alekseyev

  I've got a Linux box where there’s Tomcat running, with some JSP applications in it. Now, I’ve received a third party app from a developer shop to be eventually deployed. It came as an archive called "jboss7.tar" which, it seems, contained a whole standalone Web server. Once I’ve followed their instructions and run the designated shell script, it would start a server that would listen on port 8081, and app pages are being served up. Still, this strikes me as an inelegant setup. Why run two Web servers side by side, both of them Java-enabled? Also, the manual startup of the standalone app, I don't like that either. The real question is – can I take the user-provided portions from the said archive and somehow plug it under the existing Tomcat instance? It looks like the user code is packaged into files with .war extension, I can see them under /var/jboss7/standalone/deployments.

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• vsftpd allow anonymous log-in

  - by user1817081

  I'm setting up a ftp server, that will allow anonymous to READ/WRITE to the server. Here is my configuration. anonymous_enable=YES local_enable=YES write_enable=YES anon_upload_enable=YES anon_mkdir_write_enable=YES xferlog_enable=YES connect_from_port_20=YES xferlog_file=/var/log/xferlog xferlog_std_format=YES ftpd_banner=Welcome to blah FTP service. listen=YES pam_service_name=vsftpd userlist_enable=NO tcp_wrappers=YES no_anon_password=YES In my /var/ftp/ i set the permission to 755. When I tried to set it to 777 i got the following error, when i tried to log in. 500 OOPS: vsftpd: refusing to run with writeable anonymous root login failed. Do i need to set up anything else to allow READ/WRITE for anonymous?

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• How to tunnel local port through proxy server?

  - by Joe Casadonte

  I have a non-proxy-aware program that I need to get working through an HTTP proxy server. The program (MYPROG) running on a machine I can configure at will (MYSRV) connects to a specific server (DESTSRV) on a specific port (DESTPRT). There is an existing HTTP proxy server (PROXYSRV:PROXYPRT) that will allow the traffic through if MYPROG was proxy-aware, but it isn't. Is there a way to listen locally on a specific port and forward the traffic through the proxy server? I can totally configure where MYPROG points to, so I could point it to MYSRV:4545 with the thought that some wonder program will redirect the data to DESTSRV:DESTPRT through PROXYSRV:PROXYPRT. I'm thinking IP Tables or netcat could do the trick if only I could figure them out... Thanks!

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• 502 errors with apache mod_proxy hot standby (or equivalent)

  - by 6million

  Anyone knows how to configure the hot standby (+H) mod_proxy feature so that the takeover occurs immediately (without even one user receiving a 502) error during a shutdown? We aren't looking for real load-balancing, we just want a secondary server to take over while we shutdown the primary. The problem is that whenever the primary goes down, I'm able to slip one invalid request resulting in a 502 HTTP error reaching the end user,before the secondary actually takes over. Listen 80 <VirtualHost 127.0.0.1:80> ServerName domain.com ProxyPass / balancer://balance/ <Proxy balancer://balance/> BalancerMember http://primary_ip:80 BalancerMember http://secondary_ip:80 status=+H </Proxy> </VirtualHost>

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• Setting up proxy to handle subdomain requests

  - by PeeHaa

  I have setup a proxy for a site which works with the following nginx config: server { listen 80; server_name proxy.example.com; access_log /dev/null; error_log /dev/null; location / { proxy_pass http://thepiratebay.se; proxy_set_header X-Real-IP $remote_addr; } } However on this there are also styles loaded from a subdomain (static.thepiratebay.se) which aren't going through my proxy, because it links to the original domain. Is there a way to also let those requests go to my proxy? Do I have to change the contents of the pages when serving it to let them also go through my proxy? If so: how? :) Or is there another (perhaps better) way?

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• Multiple Session using port 1081 in one box using SSH

  - by regmaster

  Hi Guru's, I am setting Linux Hopping Station to another different servers. My current config to connect to another servers is using different port to connect. e.g ssh -D 1080 -p 22 [email protected] ssh -D 1081 -p 22 [email protected] Now what I would like to have to share the same port from the same box. ssh -D 1080 -p 22 [email protected] ssh -D 1080 -p 22 [email protected] But when I share it, I will get below error: bind: Address already in use channel_setup_fwd_listener: cannot listen to port: 1080 Could not request local forwarding. How could I configure the same port? help. thank you. I want to share the same port because this is needed when configuring firewall in Citrix Firewall on other machine, not needed to many many ports and keep changing when changing connection. thank you.

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• TCP Sessions and IP Changes

  - by Kyle Brandt

  What happens to a TCP session when the IP of a client changes? I did a simple test of having netcat listen on a port, and connecting to that port from a client machine. I then changed the IP of the client while that nc session was open and sent some data, no data was received by server after changing the IP. I know they are different layers, but does TCP use IPs for part of how it distinguishes sessions? Does my example not work because of how the application handles it, or is this not working because of something happening at TCP/IP/Ethernet layers? Does this depend on the OS implementation? ( I am most interested in Linux at the moment)

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• How to record audio in Windows Server 2008 Web SP2?

  - by Aurelio De Rosa

  I face into this problem and before ask here I've searched and read a lot of question but no-one seems to fit to my problem. I have a server running Windows Server 2008 Web with the SP2 and a headset attached to it using audio jack. The server has audio driver since I can listen audio. This OS does not came with the built-in audio record tool (the one I have in Windows 7). I can access physically and remotely (using RDC) to this server with administration permission. My local pc has Windows 7 if it can help. All I want to do is to know if it's possible and how to record audio form the microphone (of the server) and store that file in the server from remote connection. I tried to install several software on the server but everyone fails with a different issues (missing DLL which if I put in the system the error doesn't go away).

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• UFW blocking webrick on port 3000

  - by t Book

  On a ubuntu 10.0.4 server runs redmine. starting webrick with: ./server webrick -e production -b lvps46-173-79-113.dedicated.hosteurope.de -d makes redmine available in browser. as soon as we enable ufw, webrick can´t be accessed anymore. of course we allowed Port 3000 from anywhere ufw allow 3000/tcp ufw allow 3000/udp also a grep for iptables doesn´t show a deny rule iptables -nL | grep 3000 find the whole iptables output here http://pastebin.com/k6WNqdPU checking lsof -ni tcp:2222 tells me ruby is listening on port 3000 ruby 3457 root 5u IPv4 864846667 0t0 TCP 46.173.79.113:3000 (LISTEN) What else can we check? what´s wrong with the ufw rules for port 3000?

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• Send nginx X-Accel-Redirect request from remote server

  - by phingage

  I have 2 server first (domain.com) is a django/apache server, second (f1.domain.com) is a file server (nginx) where some files are protected and should be allow download only to registred user, so i have setup a nginx server with a server { listen 80 default_server; server_name *.domanin.com; access_log /home/domanin/logs/access.log; location /files/ { internal; root /home/domanin; } } and from django I send a request via X-Accel-Redirect header, but dosen't work i think because come from a remote server, how can i accomplish my task? regards!

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• Port forwarding (portmap) works only locally

  - by Tag Wint

  There are four hosts hostA winXP hostB Win2003 hostC Linux RHEL hostD Linux RHEL hostA cannot connect to C and D directly, but B can hostA connects to hostB using VPN hostB and hostC belong to the same subnet1 hostD is in subnet2 From hostA I need to connect to hostC and hostD by SSH. Now I can do it as follows: 1.connecting from hostA to hostB by RDP logon and there: 2.start putty client. I'd like to omit step 1 and connect from A to C and D directly On hostB I have admin acoount and configure port forwarding as follows: netsh interface portproxy add v4tov4 listenport=N1 connectaddress=hostC_IP connectport=N2 netsh interface portproxy add v4tov4 listenport=N3 connectaddress=hostD_IP connectport=N2 netsh interface portproxy show all: Listen on IPv4: Connect to IPv4: Address Port Address Port --------------- ---------- --------------- ---------- * N1 hostC_IP N2 * N3 hostD_IP N2 Now from hostB I can connect to either C and D: ssh localhost:N1 ssh localhost:N3 from hostA ssh hostB:N1 works too, but ssh hostB:N3 DON'T I guess the reason might be different subnets, still have no idea how to fix it. What should I do?

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• How do I use a custom 503 error page with Nginx?

  - by Michael Gorsuch

  Hi. I have implemented rate limiting with Nginx (which works excellently, by the way) and would like to display a custom 503 error page. I have followed examples on the web without luck. I am running a simple configuration that looks something like this: listen x.x.x.x:80 server_name something.com root /usr/local/www/something.com; error_page 503 /503.html; location / { limit_req zone=default burst=5 nodelay; proxy_pass http://mybackend; } The idea is that our rate limited users would be shown a special page explaining what was going on. The rate limiting is working, but the built-in 503 page is rendering. Any ideas?

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• nginx load balance with IIS backend servers waiting Host header

  - by Elgreco08

  i have a ubuntu 10.04 with nginx /0.8.54 running as a load balance proxy named: www.local.com I have two IIS backend servers which responds on Host header request web1.local.com web2.local.com Problem: When i hit my nginx balancer on www.local.com my backend servers respond with the default server blank webpage (IIS default page) since they are waiting for a right host header (e.g. web1.local.com) my nginx.conf upstream backend { server web1.local.com:80; server web2.local.com:80; } server { listen 80; location / { proxy_pass http://backend; proxy_set_header X-Real-IP $remote_addr; proxy_set_header Host $proxy_host; } } any hint ?

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• Configure a app in a subpath in nginx

  - by Rubem Azenha

  I have a nginx + passenger + single rails app setup in a Fedora server. My nginx.conf regarding my app looks something like this: server { listen 80; server_name myapp.mycompany.com; root /opt/apps/myapp_large_name/public; passenger_enabled on; client_max_body_size 4M; } So when I access myapp.mycompany.com.br it access to my rails app under /opt/apps/myapp_large_name/public. I want to be able to configure a subpath to access to another app (in this case, monit). I want something like that: myapp.mycompany.com.br/monit access the monit app. Is it possible?

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• Where are the Record Volume Controls in Windows 7?

  - by DJbigJack

  Windows XP (and previous versions) had a Record Volume Control panel that could be used to select between music inputs (Stereo Mix, Wav, etc) and a microphone. There doesn't seem to be an equivalent capability in Windows 7 . Is there a third party application that provides this functionality? Note: the Windows XP Record Volume Control was accessed by doubleclicking the Speaker icon in the system try which displayed the (Listen) Volume Control. In the menu there was a "properties" which gave you the option of displaying the RECORD Volume Control instead. I used this capabiliy in Win XP to select the required inputs for an Internet Radio Station and now with Win 7, I can't do it any longer

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• Haproxy, configure for one host

  - by Michal K.

  I have to use haproxy on one machine. I want to do redirect requests from Ip to the same ip (with another port). My configuration (doesn't work): lobal maxconn 4096 # Total Max Connections. This is dependent on ulimit daemon nbproc 1 # Number of processing cores. Dual Dual-core Opteron is 4 cores for example. defaults mode http clitimeout 600000000 srvtimeout 600000000 contimeout 400000000 log 127.0.0.1 local0 log 127.0.0.1 local1 notice option httpclose # Disable Keepalive listen http_proxy 127.0.0.1:8080 balance leastconn # Load Balancing algorithm acl acl_apache path_end .avi .jpeg #option httpchk option forwardfor # This sets X-Forwarded-For ## Define your servers to balance server DE2 127.0.0.1:8080 weight 1 maxconn 15 check

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• Testifying that somaxconn change can make a difference

  - by petermolnar

  I got into an argument on the net.core.somaxconn parameter: I was told that it will not make any difference if we change the default 128. I believed this might be enough proof: "If the backlog argument is greater than the value in /proc/sys/net/core/somaxconn, then it is silently truncated to that value" http://linux.die.net/man/2/listen but it's not. So does anyone know a method to testify this with two machines, one running, for example MySQL or LVS and the other is hammering it in a GBit network? I'm opened to any solution, scripts are slightly more welcome.

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• choose server backend to some URL with haproxy

  - by shingara

  To some URL I don't want use some server. So use other. Actually I have this haproxy configuration. global daemon log 127.0.0.1 local0 #log loghost local0 info maxconn 4096 #debug #quiet user haproxy group haproxy defaults log global mode http option httplog option dontlognull retries 3 option redispatch maxconn 2000 contimeout 5000 clitimeout 50000 srvtimeout 50000 balance roundrobin stats enable stats refresh 5s stats auth admin:123abc789xyz # Set up application listeners here. listen application 0.0.0.0:10000 server localhost 127.0.0.1:10100 weight 1 maxconn 5 check server externe 127.0.0.1:10101 weight 1 maxconn 5 check By example I want all url to /users be served only by server localhost, not by externe.

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• Apache not responding in amazon ec2

  - by Viren

  Well this might sound awkward but I facing terrible issue with my Amazon EC2 instance one of the finding I see is that apache is not responding on port 80 which is weird because I can't even find the incoming packet to port 80 in tcpdump output As per the security rules all security rules are in place correctly at least in amazon console I restarted the apache to listen to port 8080 and added port 8080 and add 8080 to security rule and everything work but I cant just able to understand as to why the port 80 not responding Needless to say since port 8080 is responding all my CNAME and A-record is working too UPDATE No firewall issue either I just cross check the iptables and list is empty Can some share a light on this

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• Application specific environment on the same server in Nginx/Passenger

  - by dexter

  I have two Rails applications (say app1 and app2) deployed using Nginx/Passenger. The server definition in nginx.conf looks like this: server { rails_env demo; client_max_body_size 50M; listen 80; server_name localhost; root /data/apps; passenger_enabled on; passenger_base_uri /app1; passenger_base_uri /app2; } You can see that both are configured to use demo as the RAILS_ENV. How should I change my configuration to run both the apps in different environments. Let's assume app2 is suppose to run with RAILS_ENV=qa and app1 with RAILS_ENV=demo

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