scrutation par changement de ports

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Auteur	Sujet : scrutation par changement de ports

kmchen13

Bonjour,

Aujourd'hui sur un serveur Debian Stretch je trouve plus de 600 IP bannies par fail2ban.

Examinant les logs apache je vois des tentatives d'accès avec changement de port dont voici un extrait:

ath '/var/www/clients/client1/web4/private/index.php') because search permissions are missing on a component of the path
[Tue Jun 05 23:24:32.469821 2018] [core:error] [pid 15794] (13)Permission denied: [client 34.232.68.69:47028] AH00035: access to /clients/client1/web4/private/index.xhtml denied (filesystem path '/var/www/clients/client1/web4/private/index.xhtml') because search permissions are missing on a component of the path
[Tue Jun 05 23:24:32.469876 2018] [core:error] [pid 15794] (13)Permission denied: [client 34.232.68.69:47028] AH00035: access to /clients/client1/web4/private/index.htm denied (filesystem path '/var/www/clients/client1/web4/private/index.htm') because search permissions are missing on a component of the path
[Tue Jun 05 23:25:06.848124 2018] [core:error] [pid 11253] (13)Permission denied: [client 34.232.68.69:29860] AH00035: access to /clients/client1/web4/webdav/index.html denied (filesystem path '/var/www/clients/client1/web4/webdav/index.html') because search permissions are missing on a component of the path
[Tue Jun 05 23:25:06.848191 2018] [core:error] [pid 11253] (13)Permission denied: [client 34.232.68.69:29860] AH00035: access to /clients/client1/web4/webdav/index.cgi denied (filesystem path '/var/www/clients/client1/web4/webdav/index.cgi') because search permissions are missing on a component of the path
[Tue Jun 05 23:25:06.848209 2018] [core:error] [pid 11253] (13)Permission denied: [client 34.232.68.69:29860] AH00035: access to /clients/client1/web4/webdav/index.pl denied (filesystem path '/var/www/clients/client1/web4/webdav/index.pl') because search permissions are missing on a component of the path
[Tue Jun 05 23:25:06.848241 2018] [core:error] [pid 11253] (13)Permission denied: [client 34.232.68.69:29860] AH00035: access to /clients/client1/web4/webdav/index.php denied (filesystem path '/var/www/clients/client1/web4/webdav/index.php') because search permissions are missing on a component of the path
[Tue Jun 05 23:25:06.848258 2018] [core:error] [pid 11253] (13)Permission denied: [client 34.232.68.69:29860] AH00035: access to /clients/client1/web4/webdav/index.xhtml denied (filesystem path '/var/www/clients/client1/web4/webdav/index.xhtml') because search permissions are missing on a component of the path
[Tue Jun 05 23:25:06.848273 2018] [core:error] [pid 11253] (13)Permission denied: [client 34.232.68.69:29860] AH00035: access to /clients/client1/web4/webdav/index.htm denied (filesystem path '/var/www/clients/client1/web4/webdav/index.htm') because search permissions are missing on a component of the path
[Tue Jun 05 23:25:06.848301 2018] [core:error] [pid 11253] (13)Permission denied: [client 34.232.68.69:29860] AH00035: access to /clients/client1/web4/private/index.html denied (filesystem path '/var/www/clients/client1/web4/private/index.html') because search permissions are missing on a component of the path
[Tue Jun 05 23:25:06.848319 2018] [core:error] [pid 11253] (13)Permission denied: [client 34.232.68.69:29860] AH00035: access to /clients/client1/web4/private/index.cgi denied (filesystem path '/var/www/clients/client1/web4/private/index.cgi') because search permissions are missing on a component of the path
[Tue Jun 05 23:25:06.848334 2018] [core:error] [pid 11253] (13)Permission denied: [client 34.232.68.69:29860] AH00035: access to /clients/client1/web4/private/index.pl denied (filesystem path '/var/www/clients/client1/web4/private/index.pl') because search permissions are missing on a component of the path
[Tue Jun 05 23:25:06.848349 2018] [core:error] [pid 11253] (13)Permission denied: [client 34.232.68.69:29860] AH00035: access to /clients/client1/web4/private/index.php denied (filesystem path '/var/www/clients/client1/web4/private/index.php') because search permissions are missing on a component of the path
[Tue Jun 05 23:25:06.848365 2018] [core:error] [pid 11253] (13)Permission denied: [client 34.232.68.69:29860] AH00035: access to /clients/client1/web4/private/index.xhtml denied (filesystem path '/var/www/clients/client1/web4/private/index.xhtml') because search permissions are missing on a component of the path
[Tue Jun 05 23:25:06.848380 2018] [core:error] [pid 11253] (13)Permission denied: [client 34.232.68.69:29860] AH00035: access to /clients/client1/web4/private/index.htm denied (filesystem path '/var/www/clients/client1/web4/private/index.htm') because search permissions are missing on a component of the path
[Tue Jun 05 23:25:42.457151 2018] [core:error] [pid 15952] (13)Permission denied: [client 34.232.68.69:4266] AH00035: access to /clients/client1/web4/webdav/index.html denied (filesystem path '/var/www/clients/client1/web4/webdav/index.html') because search permissions are missing on a component of the path
[Tue Jun 05 23:25:42.457229 2018] [core:error] [pid 15952] (13)Permission denied: [client 34.232.68.69:4266] AH00035: access to /clients/client1/web4/webdav/index.cgi denied (filesystem path '/var/www/clients/client1/web4/webdav/index.cgi') because search permissions are missing on a component of the path
[Tue Jun 05 23:25:42.457263 2018] [core:error] [pid 15952] (13)Permission denied: [client 34.232.68.69:4266] AH00035: access to /clients/client1/web4/webdav/index.pl denied (filesystem path '/var/www/clients/client1/web4/webdav/index.pl') because search permissions are missing on a component of the path
[Tue Jun 05 23:25:42.457283 2018] [core:error] [pid 15952] (13)Permission denied: [client 34.232.68.69:4266] AH00035: access to /clients/client1/web4/webdav/index.php denied (filesystem pat

Je ne comprends pas que ces requêtes aient passé le firewall car ces ports 47028, 29860, 4266, ... sont normalement fermés:

Ports ouverts:========================>

Starting Nmap 6.47 ( http://nmap.org ) at 2018-06-06 12:52 CEST
Nmap scan report for localhost (127.0.0.1)
Host is up (0.000011s latency).
Other addresses for localhost (not scanned): 127.0.0.1
Not shown: 981 closed ports
PORT STATE SERVICE
21/tcp open ftp
22/tcp open ssh
25/tcp open smtp
80/tcp open http
110/tcp open pop3
111/tcp open rpcbind
143/tcp open imap
443/tcp open https
465/tcp open smtps
587/tcp open submission
993/tcp open imaps
995/tcp open pop3s
3306/tcp open mysql
8081/tcp open blackice-icecap
9001/tcp open tor-orport
9002/tcp open dynamid
9003/tcp open unknown
10024/tcp open unknown
10025/tcp open unknown

Nmap done: 1 IP address (1 host up) scanned in 2.53 seconds
Connexions Internet actives (serveurs et établies)
Proto Recv-Q Send-Q Adresse locale Adresse distante Etat PID/Program name
tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN 31675/master
tcp 0 0 0.0.0.0:40064 0.0.0.0:* LISTEN -
tcp 0 0 0.0.0.0:56000 0.0.0.0:* LISTEN 3911/rpc.statd
tcp 0 0 0.0.0.0:993 0.0.0.0:* LISTEN 1/systemd
tcp 0 0 0.0.0.0:995 0.0.0.0:* LISTEN 8200/dovecot
tcp 0 0 127.0.0.1:10024 0.0.0.0:* LISTEN 2942/amavisd-new (c
tcp 0 0 127.0.0.1:9001 0.0.0.0:* LISTEN 5997/php-fpm: pool
tcp 0 0 127.0.0.1:10025 0.0.0.0:* LISTEN 31675/master
tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN 13550/mysqld
tcp 0 0 127.0.0.1:9002 0.0.0.0:* LISTEN 5991/php-fpm: pool
tcp 0 0 127.0.0.1:10026 0.0.0.0:* LISTEN 2942/amavisd-new (c
tcp 0 0 127.0.0.1:9003 0.0.0.0:* LISTEN 11128/php-fpm: pool
tcp 0 0 0.0.0.0:587 0.0.0.0:* LISTEN 31675/master
tcp 0 0 127.0.0.1:11211 0.0.0.0:* LISTEN 3370/memcached
tcp 0 0 127.0.0.1:9004 0.0.0.0:* LISTEN 5995/php-fpm: pool
tcp 0 0 127.0.0.1:9005 0.0.0.0:* LISTEN 5993/php-fpm: pool
tcp 0 0 0.0.0.0:110 0.0.0.0:* LISTEN 8200/dovecot
tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 16511/rpcbind
tcp 0 0 0.0.0.0:143 0.0.0.0:* LISTEN 1/systemd
tcp 0 0 0.0.0.0:465 0.0.0.0:* LISTEN 31675/master
tcp 0 0 0.0.0.0:21 0.0.0.0:* LISTEN 27707/pure-ftpd (SE
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1408/sshd
tcp 0 0 127.0.0.1:3306 127.0.0.1:60443 ESTABLISHED 13550/mysqld
tcp 0 1224 85.31.203.70:22 84.123.2.202:37734 ESTABLISHED 25652/0
tcp 0 0 127.0.0.1:33672 127.0.0.1:22 TIME_WAIT -
tcp 0 0 127.0.0.1:3306 127.0.0.1:60871 ESTABLISHED 13550/mysqld
tcp 0 0 127.0.0.1:60443 127.0.0.1:3306 ESTABLISHED 10051/amavisd-new (
tcp 0 0 127.0.0.1:60871 127.0.0.1:3306 ESTABLISHED 2942/amavisd-new (c
tcp 0 0 192.168.1.1:895 192.168.1.253:2049 ESTABLISHED -
tcp 9 0 127.0.0.1:9003 127.0.0.1:55440 CLOSE_WAIT 13959/php-fpm: pool
tcp6 0 0 :::59576 :::* LISTEN 3911/rpc.statd
tcp6 0 0 :::25 :::* LISTEN 31675/master
tcp6 0 0 :::443 :::* LISTEN 20843/apache2
tcp6 0 0 :::60062 :::* LISTEN -
tcp6 0 0 :::993 :::* LISTEN 1/systemd
tcp6 0 0 :::995 :::* LISTEN 8200/dovecot
tcp6 0 0 ::1:10024 :::* LISTEN 2942/amavisd-new (c
tcp6 0 0 ::1:10026 :::* LISTEN 2942/amavisd-new (c
tcp6 0 0 :::587 :::* LISTEN 31675/master
tcp6 0 0 :::110 :::* LISTEN 8200/dovecot
tcp6 0 0 :::111 :::* LISTEN 16511/rpcbind
tcp6 0 0 :::143 :::* LISTEN 1/systemd
tcp6 0 0 :::80 :::* LISTEN 20843/apache2
tcp6 0 0 :::8081 :::* LISTEN 20843/apache2
tcp6 0 0 :::465 :::* LISTEN 31675/master
tcp6 0 0 :::21 :::* LISTEN 27707/pure-ftpd (SE
tcp6 0 0 :::4949 :::* LISTEN 3422/perl
tcp6 0 0 :::22 :::* LISTEN 1408/sshd
tcp6 0 0 85.31.203.70:443 78.124.179.28:52629 TIME_WAIT -
udp 0 0 0.0.0.0:37253 0.0.0.0:* 758/rsyslogd
udp 0 0 127.0.0.1:695 0.0.0.0:* 3911/rpc.statd
udp 0 0 0.0.0.0:44902 0.0.0.0:* 3911/rpc.statd
udp 0 0 127.0.0.1:11211 0.0.0.0:* 3370/memcached
udp 0 0 0.0.0.0:998 0.0.0.0:* 16511/rpcbind
udp 0 0 0.0.0.0:111 0.0.0.0:* 16511/rpcbind
udp 0 0 192.168.1.1:123 0.0.0.0:* 2648/ntpd
udp 0 0 85.31.203.70:123 0.0.0.0:* 2648/ntpd
udp 0 0 127.0.0.1:123 0.0.0.0:* 2648/ntpd
udp 0 0 0.0.0.0:123 0.0.0.0:* 2648/ntpd
udp 0 0 0.0.0.0:41084 0.0.0.0:* -
udp 0 0 0.0.0.0:161 0.0.0.0:* 7750/snmpd
udp6 0 0 :::44835 :::* -
udp6 0 0 :::998 :::* 16511/rpcbind
udp6 0 0 :::111 :::* 16511/rpcbind
udp6 0 0 fe80::250:56ff:fe86:123 :::* 2648/ntpd
udp6 0 0 fe80::250:56ff:fe86:123 :::* 2648/ntpd
udp6 0 0 ::1:123 :::* 2648/ntpd
udp6 0 0 :::123 :::* 2648/ntpd
udp6 0 0 :::52531 :::* 3911/rpc.statd

Publicité

Ivy gu

3 blobcats dans un trenchcoat

ce sont les ports source.

Le port source est choisi aléatoirement à chaque connexion et il n'y a pas lieu de faire de filtrage sur ce critère, c'est un comportement normal.

---------------
♪ look at me still talking when there's science to do, when I look up there it makes me glad I'm not you ♪

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scrutation par changement de ports

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