Data Socket Error Cannot Resolve Host Name
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Cannot Resolve Hostname Raspberry Pi
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Cannot Resolve Hostname Over Vpn
topic Data Socket Error: Connection Refused Rate Topic: #1 ChrisB New Member Group: Members Posts: 6 Joined: 24-August 07 Posted 24 August 2007 -
Cannot Resolve Hostname Remote Desktop
10:10 AM I'm running version 3.9.0 on our central server and using a self-signed Digitial Certificate to use SSL. It was working perfectly yesterday but trying to connect to it today causes my FTP client to report:CODESmartFTP v2.5.1006.26Resolving host name "xxx"Connecting to xxx Port: 21Connected to xxx.220 Gene6 FTP cannot resolve hostname linux Server v3.9.0 (Build 2) ready...AUTH TLS234 AUTH command ok; starting SSL connection.Connected. Exchanging encryption keys...Session Cipher: 128 bit RC4TLS encrypted session established.PBSZ 0200 PBSZ=0USER xxx331 Password required for xxx.PASS (hidden)230 User xxx logged in.SYST215 UNIX Type: L8Detected Server Type: UNIXFEAT211-Extensions supported: AUTH TLS CCC CLNT CPSV EPRT EPSV MDTM MFCT MFMT MLST type*;size*;create;modify*; PASV PBSZ PROT REST STREAM SIZE SSCN TVFS UTF8 XCRC "filename" SP EP XMD5 "filename" SP EP XSHA1 "filename" SP EP211 End.Detected Server Software: Gene6 FTP Server 3.xCLNT SmartFTP 2.5.1006200 Noted.OPTS UTF8 ON200 UTF8 OPTS ONPWD257 "/" is current directory.TYPE A200 Type set to A.PROT P200 PROT command successful.PASV227 Entering Passive Mode (xxx)Opening data connection to xxx Port: 41488MLSDConnected. Exchanging encryption keys...SSL/TLS client handshake failed (Error = 0x2746).An existing connection was forcibly closed by the remote host.0 bytes transferred. (N/A/s) (0 ms)425 Cannot open data connection.Automatic failover of data connection mode
in | Register Home Products Data Training Legal Contact us Support homepageFilter productsHow to resolve common configuration issues with Cl.. How to resolve common configuration issues cannot resolve hostname minecraft fix with Client/Server products Document type: Tech doc Associated product(s): Product name:Pro cannot resolve hostname mac | Version: 4.0 + |Implementation: API , Standalone Views: 20354 | Created: 6 years ago |Last updated: 6 years cannot resolve hostname windows 7 ago << More documents like this Summary A list of all common issues with QAS Client/Server products and how to resolve them. Problems with TCP/IP Connection Commonly Encountered QuickAddress TCP/IP http://www.g6ftpserver.com/forum/index.php?/topic/3678-data-socket-error-connection-refused/ Error Messages Error -9291 ("Bad IP number format") Error -9293 ("Couldn't listen to TCP/IP socket") Error -9294 ("Couldn't bind TCP/IP socket (port in use?)") Error -9292 ("TCP/IP accept failure") Error -9296 ("TCP/IP timeout") Error -9297 ("TCP/IP socket error") Error -9298 ("Couldn't open TCP/IP connection") Error -9299 ("Couldn't create TCP/IP socket") Error -9300 ("Dataset not present on Server") Error -9301 ("Incorrect Client/Server protocol http://support.qas.com/how_to_resolve_common_configuration_issues_with_client_server_products_1481.htm (old version?)") Solution Problems with TCP/IP Connection One of the most common configuration issues with QAS Client Server products is in making a TCP/IP connection. This can be caused by a number of factors which will be discussed in more detail below, however there are some basic settings that should be verified before these more complex issues are investigated. These are: Check that the Server daemon is running. This can be verified in a number of ways: 1. When the server starts, a Process ID number is displayed on the screen. Use the command ps to display process statistics. This command is implemented as follows: ps –f –l –u
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting http://unix.stackexchange.com/questions/265796/program-cannot-resolve-host-name-if-its-started-before-first-successful-interne ads with us Unix & Linux Questions Tags Users Badges Unanswered Ask Question _ Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. Join them; it only takes a https://developer.apple.com/library/content/documentation/NetworkingInternetWeb/Conceptual/NetworkingOverview/CommonPitfalls/CommonPitfalls.html minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Program cannot resolve host name if it's started before first successful internet connection up vote 1 cannot resolve down vote favorite This is related to a stackoverflow post I posted. Basically I have a Python script that I'm running on an embedded system (Buildroot-based). The python script runs on startup, but I cannot guarantee that the internet connection will be up by then (based on pppd), because the unit might not be in an area with mobile phone signal. What I've found is that if the python code starts before an internet connection has been established on the machine, even after the cannot resolve host connection is established, the python code is still unable to resolve names. I get a [Errno -3] Temporary failure in name resolution error when the socket tries to connect. The only way I can get it to work is to establish the internet connection at least once before I start the python code. What changes are being made to the system after the internet connection is established at least once that the Python code could be looking for? Is there something I can set up on boot up so that this does not happen? python internet pppd share|improve this question asked Feb 25 at 16:51 Amr Bekhit 1897 add a comment| 3 Answers 3 active oldest votes up vote 2 down vote accepted Most programs read the system DNS configuration (in /etc/resolv.conf) only once when they start up or when they make their first network access. They don't re-read the configuration if it changes. It appears that on your system, the DNS configuration changes when the network goes up (probably changes from unconfigured to having DNS servers configured). This is very common, and unavoidable if the system isn't always connected to the same network. A way to ensure that programs won't be affected is to run a local DNS caching server. This way, the DNS configuration for applications can be static (always nameserver 127.0.0.1 in /etc/resolv.conf), and only the DNS caching server needs to be told about the servers provided by the network connection. Dnsmasq is a common
developers often make a few common design and usage mistakes that can cause serious performance problems, crashes, and other misbehavior. This chapter highlights a few of those mistakes and describes how to avoid or fix them.Clean Up Your ConnectionsTCP connections remain open until either the connection is explicitly closed or a timeout occurs. Unless TCP keepalive is enabled for the connection, a timeout occurs only if there is data waiting to be transmitted that cannot be delivered. This means that if you do not close your idle TCP connections, they will remain open until your program quits.The recommended way to enable TCP keepalive is by setting the SO_KEEPALIVE flag on the socket with setsockopt.Note:In OS X, you can also globally change the behavior of all sockets on a particular machine by setting the net.inet.tcp.always_keepalive sysctl to a nonzero value. You should not do this in publicly shipping software because this flag affects the behavior of other software on the system. However, this flag can be useful for diagnosing and working around misbehaving software. See the sysctl man page for details.Avoid POSIX Sockets and CFSocket on iOS Where PossibleUsing POSIX sockets directly has both advantages and disadvantages relative to using them through a higher-level API. The main advantages are:Sockets greatly simplify porting networking code to and from non-Apple platforms.You can support protocols other than TCP.The main disadvantages are:Sockets have many complexities that are handled for you by higher-level APIs. Thus, you will have to write more code, which usually means more bugs.In iOS, using sockets directly using POSIX functions or CFSocket does not automatically activate the device’s cellular modem or on-demand VPN.The most appropriate times to use sockets directly are when you are developing a cross-platform tool or high-performance server software. In ot