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  • Relay Access Denied (State 13) Postfix + Dovecot + Mysql

    - by Pierre Jeptha
    So we have been scratching our heads for quite some time over this relay issue that has presented itself since we re-built our mail-server after a failed Webmin update. We are running Debian Karmic with postfix 2.6.5 and Dovecot 1.1.11, sourcing from a Mysql database and authenticating with SASL2 and PAM. Here are the symptoms of our problem: 1) When users are on our local network they can send and receive 100% perfectly fine. 2) When users are off our local network and try to send to domains not of this mail server (ie. gmail) they get the "Relay Access Denied" error. However users can send to domains of this mail server when off the local network fine. 3) We host several virtual domains on this mailserver, the primary domain being airnet.ca. The rest of our virtual domains (ex. jeptha.ca) cannot receive email from domains not hosted by this mailserver (ie. gmail and such cannot send to them). They receive bounce backs of "Relay Access Denied (State 13)". This is regardless of whether they are on our local network or not, which is why it is so urgent for us to get this solved. Here is our main.cf from postfix: myhostname = mail.airnet.ca mydomain = airnet.ca smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) biff = no smtpd_sasl_type = dovecot queue_directory = /var/spool/postfix smtpd_sasl_path = private/auth smtpd_sender_restrictions = permit_mynetworks permit_sasl_authenticated smtp_sasl_auth_enable = yes smtpd_sasl_auth_enable = yes append_dot_mydomain = no readme_directory = no smtp_tls_security_level = may smtpd_tls_security_level = may smtp_tls_note_starttls_offer = yes smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem smtpd_tls_loglevel = 1 smtpd_tls_received_header = yes smtpd_tls_auth_only = no alias_maps = proxy:mysql:/etc/postfix/mysql/alias.cf hash:/etc/aliases alias_database = hash:/etc/aliases mydestination = mail.airnet.ca, airnet.ca, localhost.$mydomain mailbox_command = procmail -a "$EXTENSION" mailbox_size_limit = 0 recipient_delimiter = + local_recipient_maps = $alias_maps $virtual_mailbox_maps proxy:unix:passwd.byname home_mailbox = /var/virtual/ mail_spool_directory = /var/spool/mail mailbox_transport = maildrop smtpd_helo_required = yes disable_vrfy_command = yes smtpd_etrn_restrictions = reject smtpd_data_restrictions = reject_unauth_pipelining, permit show_user_unknown_table_name = no proxy_read_maps = $local_recipient_maps $mydestination $virtual_alias_maps $virtual_alias_domains $virtual_mailbox_maps $virtual_mailbox_domains $relay_recipient_maps $relay_domains $canonical_maps $sender_canonical_maps $recipient_canonical_maps $relocated_maps $transport_maps $mynetworks $virtual_mailbox_limit_maps $virtual_uid_maps $virtual_gid_maps virtual_alias_domains = message_size_limit = 20971520 transport_maps = proxy:mysql:/etc/postfix/mysql/vdomain.cf virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysql/vmailbox.cf virtual_alias_maps = proxy:mysql:/etc/postfix/mysql/alias.cf hash:/etc/mailman/aliases virtual_uid_maps = proxy:mysql:/etc/postfix/mysql/vuid.cf virtual_gid_maps = proxy:mysql:/etc/postfix/mysql/vgid.cf virtual_mailbox_base = / virtual_mailbox_limit = 209715200 virtual_mailbox_extended = yes virtual_create_maildirsize = yes virtual_mailbox_limit_maps = proxy:mysql:/etc/postfix/mysql/vmlimit.cf virtual_mailbox_limit_override = yes virtual_mailbox_limit_inbox = no virtual_overquote_bounce = yes virtual_minimum_uid = 1 maximal_queue_lifetime = 1d bounce_queue_lifetime = 4h delay_warning_time = 1h append_dot_mydomain = no qmgr_message_active_limit = 500 broken_sasl_auth_clients = yes smtpd_sasl_path = private/auth smtpd_sasl_local_domain = $myhostname smtpd_sasl_security_options = noanonymous smtpd_sasl_authenticated_header = yes smtp_bind_address = 142.46.193.6 relay_domains = $mydestination mynetworks = 127.0.0.0, 142.46.193.0/25 inet_interfaces = all inet_protocols = all And here is the master.cf from postfix: # ========================================================================== # service type private unpriv chroot wakeup maxproc command + args # (yes) (yes) (yes) (never) (100) # ========================================================================== smtp inet n - - - - smtpd #submission inet n - - - - smtpd # -o smtpd_tls_security_level=encrypt # -o smtpd_sasl_auth_enable=yes # -o smtpd_client_restrictions=permit_sasl_authenticated,reject # -o milter_macro_daemon_name=ORIGINATING #smtps inet n - - - - smtpd # -o smtpd_tls_wrappermode=yes # -o smtpd_sasl_auth_enable=yes # -o smtpd_client_restrictions=permit_sasl_authenticated,reject # -o milter_macro_daemon_name=ORIGINATING #628 inet n - - - - qmqpd pickup fifo n - - 60 1 pickup cleanup unix n - - - 0 cleanup qmgr fifo n - n 300 1 qmgr #qmgr fifo n - - 300 1 oqmgr tlsmgr unix - - - 1000? 1 tlsmgr rewrite unix - - - - - trivial-rewrite bounce unix - - - - 0 bounce defer unix - - - - 0 bounce trace unix - - - - 0 bounce verify unix - - - - 1 verify flush unix n - - 1000? 0 flush proxymap unix - - n - - proxymap proxywrite unix - - n - 1 proxymap smtp unix - - - - - smtp # When relaying mail as backup MX, disable fallback_relay to avoid MX loops relay unix - - - - - smtp -o smtp_fallback_relay= # -o smtp_helo_timeout=5 -o smtp_connect_timeout=5 showq unix n - - - - showq error unix - - - - - error retry unix - - - - - error discard unix - - - - - discard local unix - n n - - local virtual unix - n n - - virtual lmtp unix - - - - - lmtp anvil unix - - - - 1 anvil scache unix - - - - 1 scache maildrop unix - n n - - pipe flags=DRhu user=vmail argv=/usr/bin/maildrop -d ${recipient} # # See the Postfix UUCP_README file for configuration details. # uucp unix - n n - - pipe flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient) # # Other external delivery methods. # ifmail unix - n n - - pipe flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient) bsmtp unix - n n - - pipe flags=Fq. user=bsmtp argv=/usr/lib/bsmtp/bsmtp -t$nexthop -f$sender $recipient scalemail-backend unix - n n - 2 pipe flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store ${nexthop} ${user} ${extension} mailman unix - n n - - pipe flags=FR user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py ${nexthop} ${user} spfpolicy unix - n n - - spawn user=nobody argv=/usr/bin/perl /usr/sbin/postfix-policyd-spf-perl smtp-amavis unix - - n - 4 smtp -o smtp_data_done_timeout=1200 -o smtp_send_xforward_command=yes -o disable_dns_lookups=yes #127.0.0.1:10025 inet n - n - - smtpd dovecot unix - n n - - pipe flags=DRhu user=dovecot:21pever1lcha0s argv=/usr/lib/dovecot/deliver -d ${recipient Here is Dovecot.conf protocols = imap imaps pop3 pop3s disable_plaintext_auth = no log_path = /etc/dovecot/logs/err info_log_path = /etc/dovecot/logs/info log_timestamp = "%Y-%m-%d %H:%M:%S ". syslog_facility = mail ssl_listen = 142.46.193.6 ssl_disable = no ssl_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem ssl_key_file = /etc/ssl/private/ssl-cert-snakeoil.key mail_location = mbox:~/mail:INBOX=/var/virtual/%d/mail/%u mail_privileged_group = mail mail_debug = yes protocol imap { login_executable = /usr/lib/dovecot/imap-login mail_executable = /usr/lib/dovecot/rawlog /usr/lib/dovecot/imap mail_executable = /usr/lib/dovecot/gdbhelper /usr/lib/dovecot/imap mail_executable = /usr/lib/dovecot/imap imap_max_line_length = 65536 mail_max_userip_connections = 20 mail_plugin_dir = /usr/lib/dovecot/modules/imap login_greeting_capability = yes } protocol pop3 { login_executable = /usr/lib/dovecot/pop3-login mail_executable = /usr/lib/dovecot/pop3 pop3_enable_last = no pop3_uidl_format = %08Xu%08Xv mail_max_userip_connections = 10 mail_plugin_dir = /usr/lib/dovecot/modules/pop3 } protocol managesieve { sieve=~/.dovecot.sieve sieve_storage=~/sieve } mail_plugin_dir = /usr/lib/dovecot/modules/lda auth_executable = /usr/lib/dovecot/dovecot-auth auth_process_size = 256 auth_cache_ttl = 3600 auth_cache_negative_ttl = 3600 auth_username_chars = abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890.-_@ auth_verbose = yes auth_debug = yes auth_debug_passwords = yes auth_worker_max_count = 60 auth_failure_delay = 2 auth default { mechanisms = plain login passdb sql { args = /etc/dovecot/dovecot-sql.conf } userdb sql { args = /etc/dovecot/dovecot-sql.conf } socket listen { client { path = /var/spool/postfix/private/auth mode = 0660 user = postfix group = postfix } master { path = /var/run/dovecot/auth-master mode = 0600 } } } Please, if you require anything do not hesistate, I will post it ASAP. Any help or suggestions are greatly appreciated! Thanks, Pierre

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  • Oracle regains the #1 UNIX Shipments Marketshare

    - by EricReid-Oracle
    Oracle has regained the #1 UNIX Server Shipments spot! According to IDC, Oracle’s share was 33.6%, up from 32.7% in the year ago period, and 32.2% in C4Q13:  IDC: WW Unix Unit Shipments, Share, Growth 2013Q1 Share 2013Q4 Share 2014Q1 Share Sequential Growth Y/Y Growth Oracle 10,141 32.7% 10,294 32.2% 8,355 33.6% -18.8% -17.6% IBM 10,203 32.9% 11,533 36.0% 6,919 27.8% -40.0% -32.2% HP 7,046 22.7% 6,786 21.2% 6,549 26.4% -3.5% -7.1% Fujitsu 1,174 3.8% 1,141 3.6% 1,069 4.3% -6.3% -8.9% Dell 565 1.8% 499 1.6% 519 2.1% 4.0% -8.2% NEC 69 0.2% 81 0.3% 63 0.3% -22.5% -9.4% Others 1,804 5.8% 1,684 5.3% 1,380 5.6% -18.1% -23.5% Total Market 31,002 100.0% 32,018 100.0% 24,854 100.0% -22.4% -19.8% While the UNIX server space is currently undergoing some contraction (on a pure numbers basis), this can be traced in part to an overall consolidation trend, due to the greatly-increased price-performance of our systems. Consider this: one SPARC T5-4 system has 1/16th the number of sockets and 1/192nd the number of cores of the previous high-end M9000-64 system -- all at 5X the price-performance. SPARC. Solaris. Nuff' said.

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  • How can I force the server socket to re-accept a request from a client?

    - by Roman
    For those who does not want to read a long question here is a short version: A server has an opened socket for a client. The server gets a request to open a socket from the same client-IP and client-port. I want to fore the server not to refuse such a request but to close the old socket and open a new one. How can I do ti? And here is a long (original) question: I have the following situation. There is an established connection between a server and client. Then an external software (Bonjour) says to my client the it does not see the server in the local network. Well, client does nothing about that because of the following reasons: If Bonjour does not see the server it does not necessarily means that client cannot see the server. Even if the client trusts the Bonjour and close the socket it does not improve the situation ("to have no open socket" is worser that "to have a potentially bad socket"). So, client do nothing if server becomes invisible to Bonjour. But than the server re-appears in the Bonjour and Bonjour notify the client about that. In this situation the following situations are possible: The server reappears on a new IP address. So, the client needs to open a new socket to be able to communicate with the server. The server reappears on the old IP address. In this case we have two subcases: 2.1. The server was restarted (switched off and then switched on). So, it does not remember the old socket (which is still used by the client). So, client needs to close the old socket and open a new one (on the same server-IP address and the same server-port). 2.2. We had a temporal network problem and the server was running the whole time. So, the old socket is still available for the use. In this case the client does not really need to close the old socket and reopen a new one. But to simplify my life I decide to close and reopen the socket on the client side in any case (in spite on the fact that it is not really needed in the last described situation). But I can have problems with that solution. If I close the socket on the client side and than try to reopen a socket from the same client-IP and client-port, server will not accept the call for a new socket. The server will think that such a socket already exists. Can I write the server in such a way, that it does not refuse such calls. For example, if it (the server) sees that a client send a request for a socket from the same client-IP and client-port, it (server) close the available socket, associated with this client-IP and client-port and than it reopens a new socket.

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  • Problem in udp socket programing in c

    - by Md. Talha
    I complile the following C code of UDP client after I run './udpclient localhost 9191' in terminal.I put "Enter Text= " as Hello, but it is showing error in sendto as below: Enter text: hello hello : error in sendto()guest-1SDRJ2@md-K42F:~/Desktop$ " Note: I open 1st the server port as below in other terminal ./server 9191. I beleive there is no error in server code. The udp client is not passing message to server. If I don't use thread , the message is passing .But I have to do it by thread. UDP client Code: /* simple UDP echo client */ #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #include <netdb.h> #include <stdio.h> #include <pthread.h> #define STRLEN 1024 static void *readdata(void *); static void *writedata(void *); int sockfd, n, slen; struct sockaddr_in servaddr; char sendline[STRLEN], recvline[STRLEN]; int main(int argc, char *argv[]) { pthread_t readid,writeid; struct sockaddr_in servaddr; struct hostent *h; if(argc != 3) { printf("Usage: %s <proxy server ip> <port>\n", argv[0]); exit(0); } /* create hostent structure from user entered host name*/ if ( (h = gethostbyname(argv[1])) == NULL) { printf("\n%s: error in gethostbyname()", argv[0]); exit(0); } /* create server address structure */ bzero(&servaddr, sizeof(servaddr)); /* initialize it */ servaddr.sin_family = AF_INET; memcpy((char *) &servaddr.sin_addr.s_addr, h->h_addr_list[0], h->h_length); servaddr.sin_port = htons(atoi(argv[2])); /* get the port number from argv[2]*/ /* create a UDP socket: SOCK_DGRAM */ if ( (sockfd = socket(AF_INET,SOCK_DGRAM, 0)) < 0) { printf("\n%s: error in socket()", argv[0]); exit(0); } pthread_create(&readid,NULL,&readdata,NULL); pthread_create(&writeid,NULL,&writedata,NULL); while(1) { }; close(sockfd); } static void * writedata(void *arg) { /* get user input */ printf("\nEnter text: "); do { if (fgets(sendline, STRLEN, stdin) == NULL) { printf("\n%s: error in fgets()"); exit(0); } /* send a text */ if (sendto(sockfd, sendline, sizeof(sendline), 0, (struct sockaddr *) &servaddr, sizeof(servaddr)) < 0) { printf("\n%s: error in sendto()"); exit(0); } }while(1); } static void * readdata(void *arg) { /* wait for echo */ slen = sizeof(servaddr); if ( (n = recvfrom(sockfd, recvline, STRLEN, 0, (struct sockaddr *) &servaddr, &slen)) < 0) { printf("\n%s: error in recvfrom()"); exit(0); } /* null terminate the string */ recvline[n] = 0; fputs(recvline, stdout); }

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  • I/O Reads and Writes per process Unix/SunOS?

    - by Alex
    Can prstat or something similar tell me how many reads/writes a process is doing similar to how Task Manager on Windows can show I/O Reads, I/O Writes and many other I/O columns per process? I'm using SunOS 5.10, but feel free to post other Unix flavours too.

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  • How to jump to a particular flag in a Unix manpage?

    - by dotancohen
    When reading a Unix manpage in the terminal, how can I jump easily to the description of a particular flag? For instance, I need to know the meaning of the -o flag for mount. I run man mount and want to jump to the place where -o is described. Currently, I search /-o however that option is mentioned in several places before the section that actually describes it, so I must jump around quite a bit. Thanks.

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  • How to handle failure to release a resource which is contained in a smart pointer?

    - by cj
    How should an error during resource deallocation be handled, when the object representing the resource is contained in a shared pointer? Smart pointers are a useful tool to manage resources safely. Examples of such resources are memory, disk files, database connections, or network connections. // open a connection to the local HTTP port boost::shared_ptr<Socket> socket = Socket::connect("localhost:80"); In a typical scenario, the class encapsulating the resource should be noncopyable and polymorphic. A good way to support this is to provide a factory method returning a shared pointer, and declare all constructors non-public. The shared pointers can now be copied from and assigned to freely. The object is automatically destroyed when no reference to it remains, and the destructor then releases the resource. /** A TCP/IP connection. */ class Socket { public: static boost::shared_ptr<Socket> connect(const std::string& address); virtual ~Socket(); protected: Socket(const std::string& address); private: // not implemented Socket(const Socket&); Socket& operator=(const Socket&); }; But there is a problem with this approach. The destructor must not throw, so a failure to release the resource will remain undetected. A common way out of this problem is to add a public method to release the resource. class Socket { public: virtual void close(); // may throw // ... }; Unfortunately, this approach introduces another problem: Our objects may now contain resources which have already been released. This complicates the implementation of the resource class. Even worse, it makes it possible for clients of the class to use it incorrectly. The following example may seem far-fetched, but it is a common pitfall in multi-threaded code. socket->close(); // ... size_t nread = socket->read(&buffer[0], buffer.size()); // wrong use! Either we ensure that the resource is not released before the object is destroyed, thereby losing any way to deal with a failed resource deallocation. Or we provide a way to release the resource explicitly during the object's lifetime, thereby making it possible to use the resource class incorrectly. There is a way out of this dilemma. But the solution involves using a modified shared pointer class. These modifications are likely to be controversial. Typical shared pointer implementations, such as boost::shared_ptr, require that no exception be thrown when their object's destructor is called. Generally, no destructor should ever throw, so this is a reasonable requirement. These implementations also allow a custom deleter function to be specified, which is called in lieu of the destructor when no reference to the object remains. The no-throw requirement is extended to this custom deleter function. The rationale for this requirement is clear: The shared pointer's destructor must not throw. If the deleter function does not throw, nor will the shared pointer's destructor. However, the same holds for other member functions of the shared pointer which lead to resource deallocation, e.g. reset(): If resource deallocation fails, no exception can be thrown. The solution proposed here is to allow custom deleter functions to throw. This means that the modified shared pointer's destructor must catch exceptions thrown by the deleter function. On the other hand, member functions other than the destructor, e.g. reset(), shall not catch exceptions of the deleter function (and their implementation becomes somewhat more complicated). Here is the original example, using a throwing deleter function: /** A TCP/IP connection. */ class Socket { public: static SharedPtr<Socket> connect(const std::string& address); protected: Socket(const std::string& address); virtual Socket() { } private: struct Deleter; // not implemented Socket(const Socket&); Socket& operator=(const Socket&); }; struct Socket::Deleter { void operator()(Socket* socket) { // Close the connection. If an error occurs, delete the socket // and throw an exception. delete socket; } }; SharedPtr<Socket> Socket::connect(const std::string& address) { return SharedPtr<Socket>(new Socket(address), Deleter()); } We can now use reset() to free the resource explicitly. If there is still a reference to the resource in another thread or another part of the program, calling reset() will only decrement the reference count. If this is the last reference to the resource, the resource is released. If resource deallocation fails, an exception is thrown. SharedPtr<Socket> socket = Socket::connect("localhost:80"); // ... socket.reset();

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  • Are parallel calls to send/recv on the same socket valid?

    - by Jay
    Can we call send from one thread and recv from another on the same socket? Can we call multiple sends parallely from different threads on the same socket? I know that a good design should avoid this, but I am not clear how these system APIs will behave. I am unable to find a good documentation also for the same. Any pointers in the direction will be helpful.

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  • Socket.ReceiveAsync problem

    - by bartol
    Hi, I have a problem using SocketAsyncEventArgs model with .net sockets. Everything works great until the moment that the server wishes to close a client connection. I use following code for this: try { socket.Shutdown(SocketShutdown.Both); } catch { } // throws if client process has already closed finally { socket.Close(); } socket = null; Each connection is using two SocketAsyncEventArgs (one for send and one for receive) and after closing the connection they are returned to a pool from which they can be later reused. And here the problem starts, because when another connection is established and receive args are reused from the pool we get an exception: System.InvalidOperationException: "An asynchronous socket operation is already in progress using this SocketAsyncEventArgs instance."; at System.Net.Sockets.SocketAsyncEventArgs.StartOperationCommon(Socket socket) at System.Net.Sockets.Socket.ReceiveAsync(SocketAsyncEventArgs e) I've done some debugging and it appears that the connection closing code from the beginning of the question does not cancel Socket.ReceiveAsync operation that is in progress when the connection is closed. I've tried many combinations of Shutdown, Disconnect and Linger options for the socket but nothing worked. Any suggestions? Thanks

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  • No feedback from Socket.SendAsync

    - by BowserKingKoopa
    I'm creating a socket and I'm trying to send data through it using SendAsync. My socket isn't connected to anything so I expected to get an error of some sort. However I get nothing. I get no indication that the send didn't work. If I use the synchronous Send method instead of the asynchronous SendAsync method I get an Exception stating that the socket isn't connected to anything. That makes sense to me. When using SendAsync the completed event doesn't ever fire and I get no indication that the send didn't work. So basically my question is how can I tell when SendAsync fails? Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); SocketAsyncEventArgs args = new SocketAsyncEventArgs(); args.SetBuffer(new byte[0], 0, 0); args.Completed += delegate(object sender, SocketAsyncEventArgs e) { Debug.WriteLine("async send complete"); Debug.WriteLine("SOCKET ERROR: " + e.SocketError); }; bool completedSynchronously = socket.SendAsync(args); if (completedSynchronously) { Debug.WriteLine("sync send complete"); Debug.WriteLine("socket error: " + args.SocketError); }

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  • Why is my emit not getting called?

    - by cRaZiRiCaN
    The client and server connect just fine. For some reason the emit on my client is not firing correctly. I am trying to get the testEmit and testEmit2 working. This is my server: express = require 'express' mongo = require 'mongodb' app = express() server = (require 'http').createServer(app) io = (require 'socket.io').listen(server) server.listen(8080) app.use(express.static(__dirname + '/public')) # db = new mongo.Db("documentsdb", new mongo.Server("localhost", 27017, auto_reconnect: true), {safe:true}) io.sockets.on 'connection', (socket) -> console.log 'Socket.io is connected!' #This returns an array of documents sorted via date by decreasing order. (Most recent documents first.) socket.on 'loadRecentDocuments', -> console.log 'Loading most recent documents.' db.collection 'documents', (err, collection) -> collection.find().sort(dateAdded: -1).toArray (err, documents) -> #This emit is recieved at index.html where a javascript function sendDocuments manages the documents. socket.emit 'sendDocuments', documents return #The index.html provides the code data from the search box via a javascript. io.sockets.on 'findDocuments', (code) -> #Returns an array of documents with the corresponding class code. documentCodeToSearch = code console.log 'Retreaving documents with code: ' + documentCodeToSearch db.collection 'documents', (err, collection) -> collection.find(code:documentCodeToSearch).toArray (err, documents) -> socket.emit 'sendDocuments', documents return #Uploads a document to the server. documentData is sent via javascript from submit.html io.sockets.on 'addDocument', (documentData) -> console.log 'Adding document: ' + documentData db.collection 'documents', (err, collection) -> collection.insert documentData, safe: true return #Test socket.io io.sockets.on 'testEmit', -> console.log('Emit recieved.') socket.emit 'testEmit2', 'caca' return app.listen 1337 console.log "Listening on port 1337..." This is my client: <!doctype HTML> <html> <head> <title>ProjectShare</title> <script src="http://localhost:8080/socket.io/socket.io.js"></script> <script src = "http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script> <script> //Make sure DOM is ready before mucking around. $(document).ready(function() { console.log('jQuery entered!'); var socket = io.connect('http://localhost:8080'); socket.emit('testEmit'); socket.on('testEmit2', function(data) { console.log('Emit recieved at browser.'); console.log(data); }); console.log('jQuery exit.'); }); </script> </head> <body> <ol> <li><a href="index.html">ProjectShare</a></li> <li><a href="guidelines.html">Guidelines</a></li> <li><a href="upload.html">Upload</a></li> <li> <form> <input type = "search" placeholder = "enter class code"/> <input type = "submit" value = "Go"/> </form> </li> </ol> <ol id = "documentList"> </ol> </body> </html>

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  • Is there a Unix/Linux platform equivalent to Telligent Community?

    - by Scott A. Lawrence
    Telligent Community combines blogs, wikis, forums, and file-sharing capabilities into a single product with single sign-on, using all Microsoft technologies. Is there an equivalent offering that runs on Unix/Linux? Or would I have to pick and choose individual product offerings and figure out another option for single sign-on across them? Are there plug-ins for something like WordPress or MovableType that might add the necessary functionality? A friend of mine is looking to add a "members-only" area to her company's website, and since they're hosted on Dreamhost (and can't afford StackExchange pricing yet), I'm trying to find other options for them.

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  • Is there a Unix/Linux platform equivalent of Telligent Community (formerly Community Server)?

    - by Scott A. Lawrence
    Telligent Community combines blogs, wikis, forums, and file-sharing capabilities into a single product with single sign-on, using all Microsoft technologies. Is there an equivalent offering that runs on Unix/Linux? Or would I have to pick and choose individual product offerings and figure out another option for single sign-on across them? Are there plug-ins for something like WordPress or MovableType that might add the necessary functionality? A friend of mine is looking to add a "members-only" area to her company's website, and since they're hosted on Dreamhost (and can't afford StackExchange pricing yet), I'm trying to find other options for them.

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  • How to Calculate TCP Socket Buffer Sizes for Data Guard Environments

    - by alejandro.vargas
    The MAA best practices contains an example of how to calculate the optimal TCP socket buffer sizes, that is quite important for very busy Data Guard environments, this document Formula to Calculate TCP Socket Buffer Sizes.pdf contains an example of using the instructions provided on the best practices document. In order to execute the calculation you need to know which is the band with or your network interface, usually will be 1Gb, on my example is a 10Gb network; and the round trip time, RTT, that is the time it takes for a packet to make a travel to the other end of the network and come back, on my example that was provided by the network administrator and was 3 ms (1000/seconds)

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  • Monitor the shell activity of a user on your Unix system?

    - by Joseph Turian
    Trust, but verify. Let's say I want to hire someone a sysadmin, and give them root access to my Unix system. I want to disable X windows for them, only allow shell usage (through SSH, maybe), so that all operations they perform will be through the shell (not mouse operations). I need a tool that will log to a remote server all commands they issue, as they issue them. So even if they install a back door and cover their tracks, that will be logged remotely. How do I disable everything but shell access? Is there a tool for instantaneously remotely logging commands as they are issued?

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  • What is the official installer for Unix packages on Mac OS?

    - by dehmann
    I'm a bit confused about the installation of standard Unix packages on Mac OS X. For example, I have /usr/bin/svn, which is SVN v.1.4.4, but FinkCommander says svn is not installed. The same holds for other packages, like emacs etc. Is that just a wrong FinkCommander setting? Currently it is set to install everything in /sw, which is not even in the PATH. So, do I just have to set it to install packages to /usr, and it will recognize the installed software? I don't want to install duplicate packages of everything, and it is quite weird that the FinkCommander seems not to be in sync with the installed software. Or is there any other installer I should be using? Is Mac Ports the recommended installer to use? (I'm using Mac OS 10.5.8.)

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  • Why does cat not use options the way I expect UNIX programs to use switches?

    - by Chas. Owens
    I have been a UNIX user for more years than I care to think about, and in that time I have been trained to expect that when contradictory switches are given to a program the last one wins. Recently I have noticed that cat -bn file and cat -nb file both use the -b option (number blank lines) over the -n option (number all lines). I get this behavior on both BSD and Linux, so I don't think it is an implementation quirk. Is this something that is specified somewhere and am I just crazy for expecting the first example to number all lines?

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  • Welcome to ubiquitous file sharing (December 08, 2009)

    - by user12612012
    The core of any file server is its file system and ZFS provides the foundation on which we have built our ubiquitous file sharing and single access control model.  ZFS has a rich, Windows and NFSv4 compatible, ACL implementation (ZFS only uses ACLs), it understands both UNIX IDs and Windows SIDs and it is integrated with the identity mapping service; it knows when a UNIX/NIS user and a Windows user are equivalent, and similarly for groups.  We have a single access control architecture, regardless of whether you are accessing the system via NFS or SMB/CIFS.The NFS and SMB protocol services are also integrated with the identity mapping service and shares are not restricted to UNIX permissions or Windows permissions.  All access control is performed by ZFS, the system can always share file systems simultaneously over both protocols and our model is native access to any share from either protocol.Modal architectures have unnecessary restrictions, confusing rules, administrative overhead and weird deployments to try to make them work; they exist as a compromise not because they offer a benefit.  Having some shares that only support UNIX permissions, others that only support ACLs and some that support both in a quirky way really doesn't seem like the sort of thing you'd want in a multi-protocol file server.  Perhaps because the server has been built on a file system that was designed for UNIX permissions, possibly with ACL support bolted on as an add-on afterthought, or because the protocol services are not truly integrated with the operating system, it may not be capable of supporting a single integrated model.With a single, integrated sharing and access control model: If you connect from Windows or another SMB/CIFS client: The system creates a credential containing both your Windows identity and your UNIX/NIS identity.  The credential includes UNIX/NIS IDs and SIDs, and UNIX/NIS groups and Windows groups. If your Windows identity is mapped to an ephemeral ID, files created by you will be owned by your Windows identity (ZFS understands both UNIX IDs and Windows SIDs). If your Windows identity is mapped to a real UNIX/NIS UID, files created by you will be owned by your UNIX/NIS identity. If you access a file that you previously created from UNIX, the system will map your UNIX identity to your Windows identity and recognize that you are the owner.  Identity mapping also supports access checking if you are being assessed for access via the ACL. If you connect via NFS (typically from a UNIX client): The system creates a credential containing your UNIX/NIS identity (including groups). Files you create will be owned by your UNIX/NIS identity. If you access a file that you previously created from Windows and the file is owned by your UID, no mapping is required. Otherwise the system will map your Windows identity to your UNIX/NIS identity and recognize that you are the owner.  Again, mapping is fully supported during ACL processing. The NFS, SMB/CIFS and ZFS services all work cooperatively to ensure that your UNIX identity and your Windows identity are equivalent when you access the system.  This, along with the single ACL-based access control implementation, results in a system that provides that elusive ubiquitous file sharing experience.

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