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1answer
50 views

Reducing HTTPS handshake by http-keepalive behind a load balancer - possible?

I have an api into which ill get quite a few requests in https. Since its restful, each time the api is sent , it requires a full ssl handshake. On enabling http-keepalive , the latency of the request ...
1
vote
1answer
135 views

Configuring nginx reverse proxy to send TCP keep alive packets to server

We have IIS servers in Azure behind load balancer. Load balancer has unconfigurable timeout of 4 minutes after which inactive connection is killed. We're trying to setup nginx as a reverse proxy to ...
0
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0answers
21 views

optimize apache for high latency satellital internet connections

I have an Apache server delivering a web app, the clients are in remote areas using satellite connections, this connections are in the range of 3mb downlink, 1mb uplink, but they have high latency (...
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0answers
62 views

Max HTTP request time for requests and downloads

What is the maximum http request time for the following: A. a Request that the server sends a few bytes of a Response every 5 seconds for 1 hour B. a Request that the server does not begin sending a ...
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0answers
196 views

Tomcat 8.0.43 not using Keep Alive

I'm trying to setup a few app servers behind Amazon's ELB and I've been getting some 504 errors that I've been tracking down. Looking at the Tomcat manager app under status, I'm seeing the following: ...
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2answers
2k views

HAProxy doesn't keep-alive http connection

I've switched on the option http-keep-alive in the defaults, as well as tried it in the frontend definition. But the Response Headers in the browser never show up keep-alive, although its there in ...
2
votes
1answer
11k views

Haproxy - timeout http-request vs timeout http-keep-alive vs timeout server

I'm trying to wrap my head around how the haproxy options timeout http-request <timeout> timeout http-keep-alive <timeout> timeout server <timeout> interact with each other. I'm ...
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0answers
317 views

Scriptable FTPS client able to send Keep Alive to control port?

We need a FTP client that satisfies the following constraints: Windows Command-line scriptable, so we can automate it...sorry, FileZilla (?) FTPS, as it seems to perform better than SFTP The ability ...
1
vote
1answer
459 views

Is tcp_keepalive application dependant on Linux?

According to http://tldp.org/HOWTO/TCP-Keepalive-HOWTO/index.html , the kernel keepalive function occurs at the OS level, and doesn't require an application to explicitly call it. However I also read ...
2
votes
1answer
2k views

Tuning tcp_keepalive_time for Node.js leak

I'm currently having a socket leak with my Node.js application. This bug is also posted here. I hope to fix this soon. CLOSE_WAIT and FIN_WAIT2 seem to be the major problem. Connections: 1662 ...
2
votes
2answers
1k views

Is it possible to tell nginx over fastcgi to pass a Connection: close header through unaltered?

TL;DR: How can I tell nginx from my php-fpm backend to a) send a "Connection: close" header and b) to not buffer my response? I have a set up running php-fpm behind nginx. In general, this works very ...
2
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0answers
921 views

Apache 2.2: RewriteMap, ProxyPass interpolation and Keep-Alive

I have an Apache httpd used as a SSL reverse proxy frontend for a lot of backends. I compute the name of the backend from the path given by the user. e.g: https://myhostname.com/myaccount translates ...
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vote
2answers
1k views

In Nginx can I set Keep-Alive dynamically depending on ssl connection?

I would like to avoid having to repeat all the virtualhost server {} blocks in nginx just to have custom ssl settings that vary slightly from plain http requests. Most ssl directives can be placed ...
4
votes
2answers
7k views

How filter only keep-alive packet with tcpdump

I need to analyze a traffic-dump on my network to check if all the PCs have enabled tcp keep-live features. I'm using tcpdump for that purpose. What I need to know is if there is a possibility to ...
2
votes
1answer
6k views

Configure keep alive timeout on Jetty 6.1.19

How do you set the timeout on keep alive connections to the Jetty web server (in my case v6.1.19)? I would like to configure how long Jetty keeps connections open when a client requests keep alive. ...
1
vote
1answer
164 views

Ubuntu concurrent connections

I'm behind a proxy that is "Enterprise DDoS Protected". On a normal day with normal connections to all my servers the concurrent connections on the proxy is 17,000. Yes 17,000 is normal for the nature ...
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2answers
1k views

keepAlive in Apache causing apache to reach its max_clients

I have an Apache 2.2 running on ubuntu 11.4 with 16Gb RAM, for image hosting from mobile phones through GPRS,since connection is slow i have enabled keepalive and set time out to 6,**based on average ...
1
vote
1answer
3k views

Is it better to disable Keep-Alive in IIS 7 for high traffic web applications?

The advice below applies to Apache, but it seems generic enough to apply regardless of system. My architecture is 3 web servers behind a load balancer. My IIS servers currently have keep-alive enabled ...
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2answers
2k views

How to add persistent connection support to a load-balanced HTTP webservice

We are working on an HTTP webservice load-balanced using haproxy. The webservice is accessed via SSL. It is a RESTful HTTP service and simply accepts JSON, does some work, and returns JSON. There is ...
3
votes
1answer
1k views

How do I confirm whether a particular Apache configuration directive is set?

How do I dynamically check/list a particular Apache configuration directive? I know that this can be checked manually from httpd.conf file, but is there any other way this can be confirmed/found from ...
1
vote
2answers
1k views

Apache Config for High Page View, Long Session Users - KeepAlive and MaxRequest variables

I am currently running a web app that sees several (~15) users logging in once each day, and then leaving the web app open where it automatically refreshes with new content every 5 minutes. Each user ...
2
votes
1answer
4k views

Keep-Alive header not sent from Tomcat 5.5 http connector?

We're currently using a hardware load balancer, which then goes to Apache and that then goes to Tomcat 5.5 via the AJP connector. We've decided to dump apache for various reasons - In our current ...
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0answers
100 views

Problem with MSDE 2000 5 minute keepalive over ISDN

We have a SQL Server transactionally pushing replicate data to an MSDE 2000 SP3a subscriber over ISDN. Prior to a recent upgrade to bring us to the MSDE 2000 level we pushed to MSDE 1. We are finding ...