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Computer QuestionsWindowsExchange 2000 // 2003 // 2007 & Active DirectoryNetworkingProgramming and MoreDatabasesUNIX // GNU/LinuxMacintoshConnectivity // Telecommunications // Internet NewsHardware // UpgradesCryptology - Cryptography and Cryptanalysis----------------Cryptographic Theory and Cryptanalysis - Internal and The problem here is not Python; you seem to be confused about which machine is connecting to which. -Miles The problem only manifests about 1 in 20 runs. As stated above, the application may be busy or waiting for some resource or just be hung. FWIW, all SYN_SENT means is that you weren't sent an RST and the SYN attempt silently failed for whatever reason.

Are you going through a proxy or FW at work, maybe that's why you are only seeing the SYN? Does your luck change if you use "localhost" or a numeric IP address in the ServerProxy URL? -Miles It seems to work fairly perfectly If i use localhost or even my If you have access to the hub to which the interface is connected, you can also check to see whether it's receiving errors. That socket connection is to a remote machine, not the same one.

What Does Syn_sent Mean

It's possible that your machine has odd DNS settings causing buzkor.hopto.org to resolve to the wrong address. -Miles Jul 13 '08 #2 P: n/a bukzor On Jul 13, 1:14*am, Miles in the CLOSE_WAIT state, and host 2 will have a FIN_WAIT_2 state or no state. The "hang then crash" (and I'm assuming"crash" here means an uncaught exception) just means that your packetsare being silently ignored by whatever machine you're actuallyattempting to connect to. This article explores how to diagnose network problems based on the state of the TCP connection.

Treat these times gently. If not, you can look at system and server application performance. But when I open my log using "WordPad", things dont look right. Syn_sent Windows low-signal-to-noise-ratio-ly yours, Miles Jul 14 '08 #9 P: n/a bukzor On Jul 13, 6:31 pm, Miles

Similar topics C#'s Socket.Connect returns normally but socket isn't connected. How To Fix Syn_sent Join them; it only takes a 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 A slow network link also forces connections to stay in states longer than usual. Note that the flags for this entry are just U, for up.

The Ethernet statistics should show an increasing number of bytes and packets received. Syn_sent Stuck However the connection blocked for minutes then get ssh: connect to host localhost port 22: Connection timed outI checked "netstat -antup" output, the daemon was started and the new connection was If you do not have access to host 2, there is not much you can do. Copyright © 2014 TechGenix Ltd.

How To Fix Syn_sent

or maybe ISP down? Conclusions Most people never pay any attention to the TCP connection state, until something goes wrong. What Does Syn_sent Mean The best you can do is try to get a login session on another host on the same network or subnet as host 2. Syn_sent Firewall I let the script run for about five minutes without it failing.

share|improve this answer edited Sep 7 '13 at 16:14 slm 3,559113248 answered Sep 5 '13 at 14:28 Rookie 211 add a comment| Your Answer draft saved draft discarded Sign up Network Security Tools Network Access Control Network Auditing Patch Management Portable Storage Security Security Scanners VPNs Web Application Security Web Content Security WhitePapers Featured Products TechGenix Sites ISAserver.org The No.1 Forefront Although all these states are normal, connections are typically in these states for only a brief time. Magalhaes Thomas Shinder Brien Posey Deb Shinder Justin Troutman Mitch Tulloch Robert J. Syn_sent Timeout

If that's not possible, then as in the previous case you need to gain access to a third host on the same network or subnet as host 2. P: n/a bukzor I'm having an issue where my program hangs while doing socket.connect() for a couple minutes, then times out the connection and crashes. May I drop them? Some network interface cards will send a link pulse as long as they have power - even if the OS is crashed.

These attacks make use of the connection request process described above by filling up the backlog queue with requests that cannot be completed. How To Resolve Syn_sent Try pinging it; if you don't get a response, it's likely that the router is down or has some kind of problem. At this point the socket status changes to ‘SYN_SENT’.

If pings are failing and you think this may be a possibility, about all you can do is contact the firewall and router administrators to confirm the filtering and request that

Also just because you are getting a link pulse does not mean that the OS is up. Did people in China resort to cannibalism during the reign of Mao? So I did a netstat on my local machine here at work, and it said TCP mymachinename:3119 *-*-*-*.*.rr.com:http SYN_SENT What is this SYN_SENT? How To Stop Syn_sent Or what is the best solution to this?

Note: This article was updated on 2016-11-14 and previously published under WIKI_Q210794 Contents 1.What is Error Syn_sent error? 2.What causes Error Syn_sent error? 3.How to easily fix Error Syn_sent errors Gap in Monitoring Too many false alerts Too many siloed monitoring tools Lack of expertise in-house vote Categories APM AppDynamics Cloud Database db2 DevOps Free Ebooks and Tools Java Programming JBoss If you have access to the kernel structures on host 2 via some kind of debugging command, you may be able to check the actual backlog value. If the remote port is the server port, then you must identify the client that was accessing the server.

Not the answer you're looking for? All rights reserved. Within or inside? Are they valid users of the server application?

Did it error out after that? In this case, the gateway address is the address of host 1.