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 Topic: Block an IP address |
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| Author |
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ian_kinch
Joined: 16 Apr 2013
Posts: 2
Location: Indonesia, Surabaya
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 Posted: Thu 18 Apr '13 6:50 Post subject: Block an IP address |
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Is it possible that i block an IP address dynamically?
Recently, i develop a module which to prevent SYN flood attack. I just figure it out, that the only ap_hook which i can use it to identify the new connection is ap_hook_pre_connection and ap_hook_precess_connection. Then, i want to block the suspicious IP address as soon as possible.
| Code: |
#include "httpd.h"
#include "http_config.h"
#include "http_connection.h"
#include "http_core.h"
#include "http_log.h"
#include "http_main.h"
#include "http_protocol.h"
#include "http_request.h"
#include "mod_status.h"
static int pre_connection_handler(conn_rec *c){
int ret;
/*
The return value is OK, DECLINED, or HTTP_mumble. If we return OK, the
server will still call any remaining modules with an handler for this
phase.
*/
ret = OK;
/*
* In this section, i want to block the ip address
* Is there any help?
*/
return ret;
}
static void register_hook(apr_pool_t *pool){
ap_hook_pre_connection(pre_connection_handler, NULL, NULL, APR_HOOK_MIDDLE);
}
module AP_MODULE_DECLARE_DATA pre_conn_module = {
STANDARD20_MODULE_STUFF,
NULL,
NULL,
NULL,
NULL,
NULL,
register_hook
};
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Sorry, if my explanation is messy, i hope you can understand what i mean. Thank you |
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James Blond
Moderator
Joined: 19 Jan 2006
Posts: 7371
Location: Germany, Next to Hamburg
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| Posted: Tue 23 Apr '13 11:08 Post subject: |
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| There is already someting called mod_dosevasive. But it sends only a 403. You woud need to block the IP in your firewall before it reaches apache. So apache would have to add dynamicly rules to the firewall. |
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ian_kinch
Joined: 16 Apr 2013
Posts: 2
Location: Indonesia, Surabaya
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| Posted: Tue 23 Apr '13 15:08 Post subject: |
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I tried that mod_evasive, but it handles a massive request, not the true DoS attack (SYN Flood).
By the way, thank you for your suggestion.  |
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