Common port question

When a client connect to a server (ex. Web server), the client will use a random port number > 1023 as a source port and then always connect to port 80 of the server. Right? The server will never use other port to communicate with client? Can server accept more than one port connection at a time? Use thread? Will each process thread assign different port other than 80? How it works?

Hats off to Walt (and of course many others) for a strong effort to provide good support.

Similar Messages

  • Is there any plan to develop secure iPad mirroring over common ports?

    We're very interested in offering our faculty the option of projecting their in-class lectures from their iPads. Unfortunately, the lack of security and the special WIFI ports required are making this very difficult for our facilities and security staff to implement in our wireless infrastructure. We feel there is a real potential benefit in new, more interactive lecturing styles that could come out of this practice. Is Apple aware of the desire for this, and if so, is there any sense of when a secure solution might be available?

    AirPlay is only using pretty standard ports - 80, 443, 554, 3289 and 5353 - so it's not something most sites would have blocked or other normal network functions from most platforms won't work either. Hence is really shouldn't be a security issue. If you're blocking those ports, you may want to revisit that and see if it's really necessary. If you must block those, then AirPlay probably just isn't going to work for you. Changing would probably require Apple to revamp much of its networking structure and use even less common ports.
    A more common issue in large institutions is the problem with dealing with multiple WiFi access points and the need to have the iPad and the Apple TV on the same subnet. Those are often more difficult issues to solve.
    Regards.

  • Common Technical Questions ( Discovery/Analysis Phase )

    Hi All,
    Could some one please post the Common Technical Questions which need to be asked to Customer at the Discovery/Analysis Phase.
    I mean common questions like Different types of Clients in SAP R/3, Procedure of Transports to be relased to Production , Approvals/Authorizations for Testing, Testing Clients etc.
    Thanks in advance.
    Best regards,
    Prashant

    Hi All,
    Could some one please post the Common Technical Questions which need to be asked to Customer at the Discovery/Analysis Phase.
    I mean common questions like Different types of Clients in SAP R/3, Procedure of Transports to be relased to Production , Approvals/Authorizations for Testing, Testing Clients etc.
    Thanks in advance.
    Best regards,
    Prashant

  • All common ports are closed?

    Hey,
    I have BT Infinity, my software version is Software version V100R001C01B031SP12_L_B (Not too sure if that means anything)
    Anyway, all my common ports are closed, this being ports like 25, 80, 110, 933, 586, 465.
    This means that none of my email clients are working, why are they all closed? I'm sure that atleat the email ports should be open by default?
    How can I fix this? Thanks  

    I assume that you can login to Yahoo webmail?
    If you can, then it has to be something wrong with your server settings.
    Take a look at these settings for Thunderbird, and see if yours match.
    Using Thunderbird e-mail client
    There are some useful help pages here, for BT Broadband customers only, on my personal website.
    BT Broadband customers - help with broadband, WiFi, networking, e-mail and phones.

  • Another port question - multiple Macs behind the same firewall

    I've searched for this issue, but I can't seem to find a topic directly on point. I know how to forward the right points for this to work, but...
    I'm coming from outside the network, and I need to control multiple machines that are behind the same firewall. I can't forward a port to more than one machine. How do I control all these machines?

    To be able to connect to a workstation from outside it's network, the ports that ARD uses must be open on both ends of the connection. ARD uses ports 3293 and 5900 so those must be open.
    If your workstations get their addresses from an NAT device rather than being "real", as seems to be the case from your description, the ports also need to be forwarded in the router to the workstation's internal IP address. ARD uses port 3283 for the reporting and updating function, so if your Macs are getting their IP addresses through NAT, since you can only forward a port to a single workstation, you can only get reports, push package/files to etc. for a single workstation.
    ARD uses the VNC protocol for observation and control, though, and there are a range of IP addresses for that protocol, starting with 5900. ARD uses 5900 by default, so that port would be forwarded to the first workstation. You would, I believe, need to install VNC servers on the systems (since the ARD client cannot listen on any port other than 5900 while VNC servers can be set for other ports such as 5901, 5902, etc. You would then forward 5901 to the second workstation (and on to 5902, 5903, etc.). You can then use the following information:
    Remote Desktop 2: How to specify a port number for a VNC client
    to connect.
    Hope this helps.
    Forum Tip: Since you're new here, you've probably not discovered the Search feature available on every Discussions page, but next time, it might save you time (and everyone else from having to answer the same question multiple times) if you search a couple of ways for a topic before you post a question.
    Regards.
    Message was edited by: Dave Sawyer

  • AS2 over HTTP Send port question.

    I have an application that builds and  sends flat and EDI files to FTP, FILE, SqlAdapter send ports and now they want AS2 over an HTTP port, I understand the AS2 settings (using party resolution, etc.) what I don't get is how/what exactly is receiving
    the message on the other side... They don't have a web service nor a page, I created a site to test but what do I do? Send an edi file to a url????
    Bico Bielich

    From your question I understand, you have been asked to send message through AS2. Do they also going to receive message through AS2 from their party? Is your question is about how to receive the message through AS2 which you also want to send over AS2?
    You can configure
    BTSHTTPReceive.dll to receive messages over HTTP and configure the Receive location with AS2 EDI pipeline component to receive messages over AS2 into BizTalk which can be subscribed by your send port filter or Orchestration ( if you have any process
    to be applied before sending the message over AS2 send).
    Check the Tutorial-3 part of AS2 which illustrate an example which receives an AS2 message through BTSHTTPReceive.dll. 
    Tutorial 3: AS2 Tutorial
    And following references shall help you configure the BTSHTTPReceive.dll:
    How to Configure IIS for an HTTP Receive Location
    Configuring BTSHTTPReceive.dll to work on IIS 7 
    If this answers your question please mark it accordingly. If this post is helpful, please vote as helpful by clicking the upward arrow mark next to my reply.

  • Essbase1113 IP Address and Port Questions

    hello,
    everyone, i'm puzzled on a question about essbase.
    it'll be so kind if you give me some suggestions.
    in our project, we install EMP System 1113 on Win Server2003, but it's in local network. there is no problem when we connect it using client tools in local network environment.
    however, we wanna connect the Essbase Server through Internet, we map the server address (such as 10.163.163.163) as an Internet address (such as 111.111.111.111).
    we didn't use VPN such tools, and, the address is just a mapping, if we don't map the port, we couldn't connect the essbase server.
    here comes the question, how do we map the essbase address and port ? i mean which port should we use, so that we could connect it through Internet ?
    thank you so much.
    wish to reply.
    hawk.

    The ports that essbase use are outlined at :- http://download.oracle.com/docs/cd/E12825_01/epm.111/epm_install_start_here/ch06s05s01.html
    Cheers
    John
    http://john-goodwin.blogspot.com/

  • S-video port question

    This is just a general knowledge question, but the S-video port on my pismo has more than the 4 holes and the rectangle connerctors there are seven holes and its weird. The S-video does work so there is no problems just wondered.

    Chismar,
    The S-Video port on my powerbook has 7 pin holes for the pins on the S-Video connector, so I guess I am missing something in your question.

  • Most Common Interview questions... help needed

    Hello,
    I have an interview coming up for a BEA WebLogic developer position. Please let me know what are the most common questions could be for WebLogic (including Portal, Integration, Workshop, and WLServer)if any one knows/or has a list or somethin....i appreciate any help
    Thanks
    Vishal

    Hello,
    I have an interview coming up for a BEA WebLogic developer position. Please let me know what are the most common questions could be for WebLogic (including Portal, Integration, Workshop, and WLServer)if any one knows/or has a list or somethin....i appreciate any help
    Thanks
    Vishal

  • Several instances using same port question

    Good Morning,
    I am going to have to create several instances on one box using solaris 10 zone technology. Each zone haveing it's own instance. I need to confirm whether or not that all those instances can use one listerner or does each instance need it's own separate port such as 1521, 1522 etc. for it's listener.
    Your opinion and recommendation on this matter will be much appreciated.
    regards,
    al

    <br>> Good Morning,
    <br>>
    <br>> I am going to have to create several instances on one
    <br>> box using solaris 10 zone technology. Each zone
    <br>> haveing it's own instance. I need to confirm
    <br>> whether or not that all those instances can use one
    <br>> listerner or does each instance need it's own
    <br>> separate port such as 1521, 1522 etc. for it's
    <br>> listener.
    <br>>
    <br>> Your opinion and recommendation on this matter will
    <br>> be much appreciated.
    <br>>
    <br>> regards,
    <br>>
    <br>> al
    <br>
    <br>Hi,
    <br>
    <br>As you are going to be using Solaris Zones would you really want to have one listener for all of the instances?
    <br>
    <br>Surely the point of using Zones is separation of the environments so why would you want to try and break that by not having separate listeners? If you aren't interested in isolating the environments then Zones seems like an added headache you can do without.
    <br>
    <br>On the question of ports... each Zone is going to have its own IP address so it really doesn't matter what port you choose. They could all have the same port for their individual listeners or they could all have different ports. Makes no odds really.
    <br>
    <br>Hope that helps.

  • Wan port question

    Could someone explain to me the Ethernet wan port menu. I'm having a lot of connection problems with Airplay. It keeps dropping and coming back on.
    I checked with my ISP and the signal (cable) is 100% stable so the problem has to be my AE.
    If I change the settings to 10Mbps/half Duplex, it seems to work ok for a while. But Automatic is a definite no-no.
    Why all those choices, especially half and full duplex and what do they mean in terms of overall performance ?
    Thx

    My question to you is did this always happen or just started happening with this modem & AirPort base station. What is the exact model of your AirPort? How about the modem?
    This has always happened since installation 3 months ago
    AE 1143 - Modem is : Motorola SB5101
    Is 8 Mbps the maximum rated download speed that your ISP is providing you for Internet service?
    Yes
    Is 8 Mbps the maximum rated download speed that your ISP is providing you for Internet service?
    Speed test (http://www.speedtest.net/)
    up: 8.17 - down: 1.02
    Changing the WAN Ethernet port speed will do nothing to improve AirPlay's performance.
    But it does ! With lower speed = less drop in feed. Or maybe it's just the fact that I change from one to another.

  • Ethernet Port Question

    I just got a new MacPro and just had a stupid question.
    I plugged it in and it works -- though, it's currently using en1 not en0
    (note I did not have airport installed, so the fact that it's listed as airport was a tad surprizing).
    My stupid question is are the ports mapped to a specific interface? eg left is en0 right is en1.
    It got annoying when it switched en1 to dhcp vs eno 's imported static ip

    One port is en(0) and the other is en(1), although this can change if you had an Airport card. Just switch the cable to the other port or reconfigure the current one to use your static IP address.

  • SPAN port question

    Hi,
    I have two core switches 6500 and Access switches 4500. Both chassis. I need to span ports, but this ports are not in a vlan. I know that there is a limit to span ports that are not in a vlan. Does anyone know which is the limit? Is there a way to make all of them to span?
    Thanks!

    Hi Pablo
    As a forum focused on technical documentation, we checked to see if there was a doc that might answer your question.
    There is not enough information in your question to for us to pinpoint exactly what you need, but have you looked at, for example, “Configuring SPAN, RSPAN, and ERSPAN” for the Catalyst 6500 (IOS 12.2SX)”?
    If this doesn’t help, we’ll refer your question to the appropriate tech support community. They will probably find it helpful to know what operating system (CatOS or IOS) and which release you have, since this determines what SPAN features and restrictions are in effect.
    Thanks for posting,
    Hilde

  • Port Question

    We're in the process of deploying Lion Server 10.7 with a public facing IP in order to support/manage iPads in the field.   The in-house security office ran an automated security scan on the server.  The portion summarized below is focuced on open ports. As you can see, a good number of "hits" are from ports the security software couldn't identify.  Other hits ID'd the port but not the process.  I have identified all of the MEDIUM level ports as required with the exception of port 22.  However, while the security staff is eyeballing ports 8088, 137, 138, 311 and 80 (I have raised eyebrows for these), I'm most concerned with their wanting to arbitrarily "close off any/all unnecessary ports".  Hence my two questions: 
    1) Can anyone help me ID Lion Server's "unecessary" ports?
    2) How exactly do you turn off Lion Server ports?
    Risk Factors: MEDIUM
    Port 22: SSH
    Port 80: HTTP
    Port 311: Serves core server functions
    Port 443: Secure sockets or https
    Port 8088: Software update service.
    Risk Factors: NONE
    5268 Service detection Help Request: Risk Factor NONE
    Port Unspecified: An HTTP proxy is running on this port.
    Port Unspecified: An Web Server is running on this port.
    Port Unspecified: An SSH Server is running on this port.
    Port Unspecified: The remote service could be identified.
    Port Unspecified: The remote service encrypts communications.
    Port Unspecified: A web server is running on this port through SSLv3.
    Port Unspecified: An SSLv3 server answered on this port.
    Port Unspecified: This port supports resuming SSLv3/TLSv1 sessions.
    Port Unspecified: This port supports SSLv3/TLSv1.0.
    Port Unspecified: A web server is running on this port through TLSv1.
    Port Unspecified: A TLSv1 server answered on this port.
    Risk Factors UNKNOWN:
    Port Unknown: 49177/udp
    Port Unknown: 51877/udp                                                                         
    Port 5268: Service Detection HELP Request                                              
    Port 53094 Unknown Use                                                                           
    Port 53403 Unknown Use                                                                           
    Port 5352 Unknown Use                                                                              
    Port 54422 Unknown Use Use                                                                      
    Port 58230 Unknown Use                                                                           
    Port 58231 Unknown Use                                                                           
    Port 60449 Unknown Use
    Port 60807 Unknown Use
    Port 625 Unknown Use
    Port 63449 Unknown Use
    Port 64224 Unknown Use
    Misc
    Port Unspecified: The remote web server does not return 404 error codes.
    Port Unspecified:  A CIFS server is running on this port.      
    It is possible to get the remote operating system name and version (Windows and/or Samba) by sending an authentication
    request to ports 139 or 445
    Service Detection – Unspecified Port: A vnc server is running on this port.                                   
    Service Detection – Unspecified Port: A Web Server is running on this port:
    Service Detection – Unspecified Port: A Web Server is running on this port:
    Service Detection – Unspecified Port: A Web Server is running on this port:
    Apple Port Listing"
    Port
    TCP or UDP
    Service or Protocol Name
    RFC
    /etc/services
    Used by / Additional information
    7
    TCP/UDP
    echo
    792
    echo
    20
    TCP
    File Transport Protocol (FTP)
    959
    ftp-data
    21
    TCP
    FTP control
    959
    ftp
    22 RISK MEDIUM
    TCP
    Secure Shell (SSH)
    4250 - 4254
    ssh
    23
    TCP
    Telnet
    854
    telnet
    25
    TCP
    Simple Mail Transfer Protocol (SMTP)
    5321
    smtp
    Mail (for sending email); MobileMe Mail (sending)
    53 NO RISK
    TCP/UDP
    Domain Name System (DNS)
    1034
    domain
    MacDNS, FaceTime
    67
    UDP
    Bootstrap Protocol Server (BootP, bootps)
    951
    bootps
    NetBoot via DHCP
    68
    UDP
    Bootstrap Protocol Client (bootpc)
    951
    bootpc
    NetBoot via DHCP
    69
    UDP
    Trivial File Transfer Protocol (TFTP)
    1350
    tftp
    79
    TCP
    Finger
    1288
    finger
    80 RISK MEDIUM
    TCP
    Hypertext Transfer Protocol (HTTP)
    2616
    http
    World Wide Web, MobileMe, QuickTime Installer, iTunes Store and Radio, Software Update, RAID Admin, Backup, iCal calendar publishing, iWeb, WebDAV (iDisk), Final Cut Server, AirPlay, OS X Lion Internet Restore, Profile Manager.
    88
    TCP
    Kerberos
    4120
    kerberos
    106 NO RISK
    TCP
    Password Server
    (Unregistered Use)
    3com-tsmux
    Mac OS X Server Password Server
    110
    TCP
    Post Office Protocol (POP3)
    Authenticated Post Office Protocol (APOP)
    1939
    pop3
    Mail (for receiving email)
    111
    TCP/UDP
    Remote Procedure Call (RPC)
    1057, 1831
    sunrpc
    Portmap (sunrpc)
    113

    You have to bear in mind there is no hard relationship between a protocol (e.g. 'HTTP', 'HTTPS', etc.) and port number. Any protocol/service can run on just about any port. Sure, there are conventions (HTTP -> 80, SMTP -> 25, etc.), but you are free to override those in your own configuration.
    In addition, Apple's listing covers the default ports used by the various Apple-provided services and configuration, so yes, you'll find multiple 'HTTPS'-based services listed, but that's not to say they're being used because you might not enable the associated service.
    For example, if you don't use JBoss then the 9006/8080/8443 ports might not be used.
    So it's up to you to look at the services you're using, to determine which ports they're using, and configure the network accordingly.
    If you're only running standard web services then you should only need port 80 (and 443 if you're using HTTPS), although it looks like Profile Manager also uses port 1640.

  • K330 sata port question

    Hello all, Im new to the forum and to Lenovo.
    I bought a K330-77273GU last week. 
    I would like to add another HD and would like to know if the sata ports on the motherboard are 3 Mb/s or 6 Mb/s?
    Two ports  are red (being used for the current HD and CD drive) and the two spare ports are orange.
    Thanks.

    hey K330_Owner,
    From : http://www.lenovo.com/psref/pdf/icbook.pdf
    there will be two 3 Gb/s and two 6 Gb/s sata cables.
    WW Social Media
    Important Note: If you need help, post your question in the forum, and include your system type, model number and OS. Do not post your serial number.
    Did someone help you today? Press the star on the left to thank them with a Kudo!
    If you find a post helpful and it answers your question, please mark it as an "Accepted Solution"!
    Follow @LenovoForums on Twitter!
    Have you checked out the Community Knowledgebase yet?!
    How to send a private message? --> Check out this article.

Maybe you are looking for