ryan@ip-10-0-5-164:~$ sudo cat /etc/apache2/mods-available/evasive20.conf
<IfModule mod_evasive24.so>
    DOSHashTableSize    3097
    DOSPageCount        1
    DOSSiteCount        1
    DOSPageInterval     1
    DOSSiteInterval     1
    DOSBlockingPeriod   90

    DOSWhitelist    127.0.0.1

    #DOSEmailNotify      [email protected]
    #DOSSystemCommand    "su - someuser -c '/sbin/... %s ...'"
    DOSLogDir           /var/log/apache2/mod_evasive
</IfModule>

ryan@ip-10-0-5-164:~$ sudo cat /etc/apache2/mods-available/evasive20.load
LoadModule evasive20_module   /usr/lib/apache2/modules/mod_evasive24.so

ryan@ip-10-0-5-164:~$ ls -l /usr/lib/apache2/modules/ | grep evasive
-rw-r--r-- 1 root root   58838 Feb 18 00:12 mod_evasive24.so

ryan@ip-10-0-5-164:~$ sudo a2enmod evasive20
Module evasive20 already enabled

ryan@ip-10-0-5-164:~$ perl test.pl
HTTP/1.1 200 OK
HTTP/1.1 200 OK
HTTP/1.1 200 OK
HTTP/1.1 200 OK
HTTP/1.1 200 OK
HTTP/1.1 200 OK
HTTP/1.1 200 OK
HTTP/1.1 200 OK
HTTP/1.1 200 OK
HTTP/1.1 200 OK
HTTP/1.1 200 OK
HTTP/1.1 200 OK
HTTP/1.1 200 OK
HTTP/1.1 200 OK
HTTP/1.1 200 OK
HTTP/1.1 403 Forbidden
HTTP/1.1 403 Forbidden
HTTP/1.1 403 Forbidden
HTTP/1.1 403 Forbidden
HTTP/1.1 403 Forbidden
HTTP/1.1 403 Forbidden
HTTP/1.1 403 Forbidden
HTTP/1.1 403 Forbidden
HTTP/1.1 403 Forbidden
HTTP/1.1 403 Forbidden

ryan@ip-10-0-5-164:~$ ls -l /tmp
total 16
-rw-r--r-- 1 www-data www-data    6 Feb 18 17:02 dos-127.0.0.1

mod_evasive20.c: In function ‘access_checker’:
mod_evasive20.c:142:39: error: ‘conn_rec {aka struct conn_rec}’ has no member named ‘remote_ip’; did you mean ‘remote_host’?
       if (is_whitelisted(r->connection->remote_ip))
                                       ^~
mod_evasive20.c:146:43: error: ‘conn_rec {aka struct conn_rec}’ has no member named ‘remote_ip’; did you mean ‘remote_host’?
       n = ntt_find(hit_list, r->connection->remote_ip);
                                           ^~
mod_evasive20.c:158:56: error: ‘conn_rec {aka struct conn_rec}’ has no member named ‘remote_ip’; did you mean ‘remote_host’?
         snprintf(hash_key, 2048, "%s_%s", r->connection->remote_ip, r->uri);
                                                        ^~
mod_evasive20.c:165:47: error: ‘conn_rec {aka struct conn_rec}’ has no member named ‘remote_ip’; did you mean ‘remote_host’?
             ntt_insert(hit_list, r->connection->remote_ip, time(NULL));
                                               ^~
mod_evasive20.c:180:58: error: ‘conn_rec {aka struct conn_rec}’ has no member named ‘remote_ip’; did you mean ‘remote_host’?
         snprintf(hash_key, 2048, "%s_SITE", r->connection->remote_ip);
                                                          ^~
mod_evasive20.c:187:47: error: ‘conn_rec {aka struct conn_rec}’ has no member named ‘remote_ip’; did you mean ‘remote_host’?
             ntt_insert(hit_list, r->connection->remote_ip, time(NULL));
                                               ^~
mod_evasive20.c:208:117: error: ‘conn_rec {aka struct conn_rec}’ has no member named ‘remote_ip’; did you mean ‘remote_host’?
         snprintf(filename, sizeof(filename), "%s/dos-%s", log_dir != NULL ? log_dir : DEFAULT_LOG_DIR, r->connection->remote_ip);
                                                                                                                     ^~
mod_evasive20.c:212:36: warning: implicit declaration of function ‘getpid’ [-Wimplicit-function-declaration]
             fprintf(file, "%ld\n", getpid());
                                    ^~~~~~
mod_evasive20.c:212:30: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 3 has type ‘int’ [-Wformat=]
             fprintf(file, "%ld\n", getpid());
                              ^
mod_evasive20.c:215:90: error: ‘conn_rec {aka struct conn_rec}’ has no member named ‘remote_ip’; did you mean ‘remote_host’?
             LOG(LOG_ALERT, "Blacklisting address %s: possible DoS attack.", r->connection->remote_ip);
                                                                                          ^
mod_evasive20.c:46:82: note: in definition of macro ‘LOG’
 #define  LOG( A, ... ) { openlog("mod_evasive", LOG_PID, LOG_DAEMON); syslog( A, __VA_ARGS__ ); closelog(); }
                                                                                  ^~~~~~~~~~~
mod_evasive20.c:221:78: error: ‘conn_rec {aka struct conn_rec}’ has no member named ‘remote_ip’; did you mean ‘remote_host’?
                 fprintf(file, "Subject: HTTP BLACKLIST %s\n\n", r->connection->remote_ip);
                                                                              ^~
mod_evasive20.c:222:81: error: ‘conn_rec {aka struct conn_rec}’ has no member named ‘remote_ip’; did you mean ‘remote_host’?
                 fprintf(file, "mod_evasive HTTP Blacklisted %s\n", r->connection->remote_ip);
                                                                                 ^~
mod_evasive20.c:228:81: error: ‘conn_rec {aka struct conn_rec}’ has no member named ‘remote_ip’; did you mean ‘remote_host’?
               snprintf(filename, sizeof(filename), system_command, r->connection->remote_ip);
                                                                                 ^~
mod_evasive20.c:229:15: warning: ignoring return value of ‘system’, declared with attribute warn_unused_result [-Wunused-result]
               system(filename);
               ^~~~~~~~~~~~~~~~
apxs:Error: Command failed with rc=65536