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Special Forums IP Networking Proxy Server IPtable rules for DNS/http/https traffic for specific hosts only, not working. Post 302899546 by phi0x on Tuesday 29th of April 2014 07:32:13 PM
Old 04-29-2014
yesterday the vps got taken down again due to too many conntrack connections they said again.

I am not sure what logs to look at but when I do netstat -ntulp it shows very few connections when they bring the vps back online. I've monitored all day checking a few times every hour to see how the netstat and the /proc/net/nf_conntrack log shows. Doesn't seem like a crazy amount of connections are being produced. I'd say no more than 1-50 connections, average around 10. Mostly opened connections from dns/proxy from a few of the ip's I have allowed in.

This is no where close to their 25-30k conntrack limit.

Today the server hasn't gone down, the iptable rules are automatically applied upon boot. Shall continue to monitor..
 

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CURLMOPT_MAX_HOST_CONNECTIONS(3)			     curl_multi_setopt options				  CURLMOPT_MAX_HOST_CONNECTIONS(3)

NAME
CURLMOPT_MAX_HOST_CONNECTIONS - set max number of connections to a single host SYNOPSIS
#include <curl/curl.h> CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_MAX_HOST_CONNECTIONS, long max); DESCRIPTION
Pass a long to indicate max. The set number will be used as the maximum amount of simultaneously open connections to a single host (a host being the same as a host name + port number pair). For each new session to a host, libcurl will open a new connection up to the limit set by CURLMOPT_MAX_HOST_CONNECTIONS(3). When the limit is reached, the sessions will be pending until a connection becomes available. If CURL- MOPT_PIPELINING(3) is enabled, libcurl will try to pipeline if the host is capable of it. The default max value is 0, unlimited. However, for backwards compatibility, setting it to 0 when CURLMOPT_PIPELINING(3) is 1 will not be treated as unlimited. Instead it will open only 1 connection and try to pipeline on it. This set limit is also used for proxy connections, and then the proxy is considered to be the host for which this limit counts. DEFAULT
0 PROTOCOLS
HTTP(S) EXAMPLE
TODO AVAILABILITY
Added in 7.30.0 RETURN VALUE
Returns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION if not. SEE ALSO
CURLMOPT_MAXCONNECTS(3), CURLMOPT_MAX_TOTAL_CONNECTIONS(3), libcurl 7.54.0 February 03, 2016 CURLMOPT_MAX_HOST_CONNECTIONS(3)
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