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fail2ban banned IP addresses; Hostname=server
unban#removeidIPjailcountryrdnsloglinestimestampportsprotocolhostnamefailures
4053804053836.135.93.37postfix-saslCN, China2026-04-03T01:34:17.465252+02:00 server postfix/smtps/smtpd[135293]: warning: unknown[36.135.93.37]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=postmaster@langstraatonline.nl2026-04-02 23:34:18smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
4053704053749.0.36.122postfix-saslBD, Bangladesh2026-04-03T01:34:05.078711+02:00 server postfix/smtps/smtpd[135293]: warning: unknown[49.0.36.122]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=postmaster@langstraatonline.nl2026-04-02 23:34:09smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
40536040536128.185.219.38postfix-saslIN, India2026-04-03T00:37:22.412796+02:00 server postfix/smtps/smtpd[133859]: warning: unknown[128.185.219.38]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=theo@langstraatonline.nl2026-04-02 22:37:24smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
40535040535128.185.201.138postfix-saslIN, India2026-04-03T00:36:55.164371+02:00 server postfix/smtps/smtpd[133806]: warning: unknown[128.185.201.138]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=theo@langstraatonline.nl2026-04-02 22:36:56smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
40534040534213.33.204.130postfix-saslRU, Russian Federation213.33.204.130.moscow.gldn.net2026-04-03T00:06:57.081604+02:00 server postfix/smtps/smtpd[20696]: warning: unknown[213.33.204.130]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=theo@langstraatonline.nl2026-04-02 22:06:57smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
4053304053314.51.223.150postfix-saslKR, Korea, Republic of2026-04-03T00:06:19.325194+02:00 server postfix/smtps/smtpd[20629]: warning: unknown[14.51.223.150]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=theo@langstraatonline.nl2026-04-02 22:06:20smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
40532040532121.189.226.81postfix-saslKR, Korea, Republic of2026-04-02T20:48:54.366761+02:00 server postfix/smtps/smtpd[15631]: warning: unknown[121.189.226.81]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=postmaster@langstraatonline.nl2026-04-02 18:48:56smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
40531040531203.172.213.166postfix-saslTH, Thailand2026-04-02T20:48:43.005547+02:00 server postfix/smtps/smtpd[15585]: warning: unknown[203.172.213.166]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=postmaster@langstraatonline.nl2026-04-02 18:48:44smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
4053004053098.102.148.242postfix-saslUS, United Statessyn-098-102-148-242.biz.spectrum.com2026-04-02T13:37:26.341344+02:00 server postfix/smtps/smtpd[4616]: warning: syn-098-102-148-242.biz.spectrum.com[98.102.148.242]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=theo@langstraatonline.nl2026-04-02 11:37:27smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
40529040529222.127.102.26postfix-saslPH, Philippines2026-04-02T13:37:17.449650+02:00 server postfix/smtps/smtpd[4616]: warning: unknown[222.127.102.26]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=theo@langstraatonline.nl2026-04-02 11:37:18smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
40473040473182.95.224.62postfix-saslIN, India2026-04-02T12:30:25.092246+02:00 server postfix/smtps/smtpd[449934]: warning: unknown[182.95.224.62]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=postmaster@langstraatonline.nl2026-04-02 10:30:25smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
4047204047259.12.212.38postfix-saslKR, Korea, Republic of2026-04-02T12:30:14.018156+02:00 server postfix/smtps/smtpd[449898]: warning: unknown[59.12.212.38]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=postmaster@langstraatonline.nl2026-04-02 10:30:15smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
4047104047195.210.105.202postfix-saslIT, Italy95-210-105-202.ip.skylogicnet.com2026-04-02T12:30:01.381631+02:00 server postfix/smtps/smtpd[449838]: warning: 95-210-105-202.ip.skylogicnet.com[95.210.105.202]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=postmaster@langstraatonline.nl2026-04-02 10:30:02smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
4047004047078.66.119.139postfix-saslSE, Sweden78-66-119-139-no600.tbcn.telia.com2026-04-02T12:27:56.085183+02:00 server postfix/smtps/smtpd[449578]: warning: 78-66-119-139-no600.tbcn.telia.com[78.66.119.139]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=postmaster@langstraatonline.nl2026-04-02 10:27:56smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
40469040469221.120.74.68postfix-saslTW, Taiwan221-120-74-68.emome-ip.hinet.net2026-04-02T12:27:47.205746+02:00 server postfix/smtps/smtpd[449578]: warning: 221-120-74-68.emome-ip.hinet.net[221.120.74.68]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=postmaster@langstraatonline.nl2026-04-02 10:27:48smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
40468040468121.131.220.143postfix-saslKR, Korea, Republic of2026-04-02T12:22:55.437519+02:00 server postfix/smtps/smtpd[449583]: warning: unknown[121.131.220.143]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=theo@langstraatonline.nl2026-04-02 10:22:56smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
40467040467184.92.13.99postfix-saslUS, United Statessyn-184-092-013-099.res.spectrum.com2026-04-02T12:22:32.107684+02:00 server postfix/smtps/smtpd[449578]: warning: unknown[184.92.13.99]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=theo@langstraatonline.nl2026-04-02 10:22:33smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
40466040466122.187.230.66postfix-saslIN, Indiansg-corporate-66.230.187.122.airtel.in2026-04-02T11:16:28.083083+02:00 server postfix/smtps/smtpd[447702]: warning: unknown[122.187.230.66]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=theo@langstraatonline.nl2026-04-02 09:16:28smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
40465040465220.189.239.206postfix-saslCN, China2026-04-02T11:16:15.300907+02:00 server postfix/smtps/smtpd[447659]: warning: unknown[220.189.239.206]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=theo@langstraatonline.nl2026-04-02 09:16:16smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
404640404642.57.122.173apache-authRO, Romania;; communications error to fd33:95ac:9ac6::1#53: timed out ;; communications error to fd33:95ac:9ac6::1#53: timed out ;; communications error to fd33:95ac:9ac6::1#53: timed out ;; communications error to 192.168.178.1#53: timed out ;; no servers could be [Thu Apr 02 10:14:12.536132 2026] [access_compat:error] [pid 428981:tid 429050] [client 2.57.122.173:58460] AH01797: client denied by server configuration: /var/www/nextcloud/config/.env.production2026-04-02 08:14:25http,httpstcpserver1
4046304046385.175.81.54postfix-saslRU, Russian Federation2026-04-02T08:02:38.124717+02:00 server postfix/smtps/smtpd[442174]: warning: unknown[85.175.81.54]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=theo@langstraatonline.nl2026-04-02 06:02:39smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
40462040462188.126.241.118postfix-saslSE, Sweden2026-04-02T08:02:17.411029+02:00 server postfix/smtps/smtpd[442174]: warning: unknown[188.126.241.118]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=theo@langstraatonline.nl2026-04-02 06:02:18smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
40461040461188.247.63.174postfix-saslRU, Russian Federation2026-04-02T07:31:24.210766+02:00 server postfix/smtps/smtpd[441254]: warning: unknown[188.247.63.174]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=postmaster@langstraatonline.nl2026-04-02 05:31:25smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
4046004046045.179.8.171postfix-saslBR, Brazil45-179-8-171.mgnetipa.net.br2026-04-02T07:31:14.122019+02:00 server postfix/smtps/smtpd[441192]: warning: 45-179-8-171.mgnetipa.net.br[45.179.8.171]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=postmaster@langstraatonline.nl2026-04-02 05:31:15smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
40459040459220.77.214.59postfix-saslKR, Korea, Republic of2026-04-02T07:21:40.120663+02:00 server postfix/smtps/smtpd[441001]: warning: unknown[220.77.214.59]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=theo@langstraatonline.nl2026-04-02 05:21:42smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
40458040458121.131.220.156postfix-saslKR, Korea, Republic of2026-04-02T07:21:15.180518+02:00 server postfix/smtps/smtpd[440954]: warning: unknown[121.131.220.156]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=theo@langstraatonline.nl2026-04-02 05:21:17smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
4045704045793.145.152.138postfix-saslIT, Italynet-93-145-152-138.cust.vodafonedsl.it2026-04-02T07:20:57.007326+02:00 server postfix/smtps/smtpd[440924]: warning: net-93-145-152-138.cust.vodafonedsl.it[93.145.152.138]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=postmaster@langstraatonline.nl2026-04-02 05:20:57smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
40456040456103.194.88.61postfix-saslIN, India2026-04-02T07:20:46.068782+02:00 server postfix/smtps/smtpd[440882]: warning: unknown[103.194.88.61]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=postmaster@langstraatonline.nl2026-04-02 05:20:46smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
40455040455182.95.185.166postfix-saslIN, India2026-04-02T07:04:57.411260+02:00 server postfix/smtps/smtpd[440371]: warning: unknown[182.95.185.166]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=theo@langstraatonline.nl2026-04-02 05:04:58smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
4045404045451.75.142.157postfix-saslFR, France157.ip-51-75-142.eu2026-04-02T07:04:39.085350+02:00 server postfix/smtps/smtpd[440325]: warning: 157.ip-51-75-142.eu[51.75.142.157]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=theo@langstraatonline.nl2026-04-02 05:04:39smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
40453040453195.128.249.100apache-authUA, Ukrainededicated.vsys.host[Thu Apr 02 05:52:16.788253 2026] [access_compat:error] [pid 428998:tid 429080] [client 195.128.249.100:55066] AH01797: client denied by server configuration: /var/www/nextcloud/config/.env2026-04-02 03:52:17http,httpstcpserver1
4045204045293.123.109.180apache-authBG, Bulgaria[Thu Apr 02 05:34:36.057548 2026] [access_compat:error] [pid 428998:tid 429041] [client 93.123.109.180:30986] AH01797: client denied by server configuration: /var/www/nextcloud/config/.env2026-04-02 03:34:36http,httpstcpserver1
4045104045136.135.103.30postfix-saslCN, China2026-04-02T04:02:02.009531+02:00 server postfix/smtps/smtpd[434648]: warning: unknown[36.135.103.30]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=theo@langstraatonline.nl2026-04-02 02:02:03smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
40450040450179.181.133.153postfix-saslBR, Brazil2026-04-02T04:01:40.249683+02:00 server postfix/smtps/smtpd[434612]: warning: unknown[179.181.133.153]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=theo@langstraatonline.nl2026-04-02 02:01:44smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
40449040449111.26.101.77postfix-saslCN, China2026-04-02T03:15:11.490779+02:00 server postfix/smtps/smtpd[433466]: warning: unknown[111.26.101.77]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=postmaster@langstraatonline.nl2026-04-02 01:15:12smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
4044804044885.30.248.213postfix-saslRU, Russian Federationbroadband-85-30-248-213.ip.moscow.rt.ru2026-04-02T03:14:48.289526+02:00 server postfix/smtps/smtpd[433410]: warning: broadband-85-30-248-213.ip.moscow.rt.ru[85.30.248.213]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=postmaster@langstraatonline.nl2026-04-02 01:14:51smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
40436040436196.188.187.205postfix-saslET, Ethiopia2026-04-01T20:23:56.325572+02:00 server postfix/smtps/smtpd[310335]: warning: unknown[196.188.187.205]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=postmaster@langstraatonline.nl2026-04-01 18:23:58smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
4039204039245.148.10.247apache-authNL, Netherlands[Tue Mar 31 13:01:21.615671 2026] [authz_core:error] [pid 116489:tid 116596] [client 45.148.10.247:11220] AH01630: client denied by server configuration: /var/www/Pure-FTPd/.htaccess2026-03-31 11:01:22http,httpstcpserver1
40372040372185.177.72.61apache-authGB, United Kingdom[Tue Mar 31 05:37:54.420594 2026] [access_compat:error] [pid 116489:tid 116585] [client 185.177.72.61:41040] AH01797: client denied by server configuration: /var/www/nextcloud/config/.git2026-03-31 03:37:55http,httpstcpserver1
4031704031794.102.49.155apache-authNL, Netherlands;; communications error to fd33:95ac:9ac6::1#53: timed out ;; communications error to fd33:95ac:9ac6::1#53: timed out ;; communications error to fd33:95ac:9ac6::1#53: timed out ;; communications error to 192.168.178.1#53: timed out ;; no servers could be [Sat Mar 28 19:37:39.860726 2026] [authz_core:error] [pid 590683:tid 590720] [client 94.102.49.155:37588] AH01630: client denied by server configuration: /var/www/Pure-FTPd/server-status2026-03-28 18:37:52http,httpstcpserver1
40316040316185.177.72.56apache-authGB, United Kingdom[Sat Mar 28 16:55:54.436567 2026] [authz_core:error] [pid 590748:tid 590791] [client 185.177.72.56:23222] AH01630: client denied by server configuration: /var/www/Pure-FTPd/.htaccess2026-03-28 15:55:55http,httpstcpserver1
4025604025662.60.130.90postfix-saslIR, Iran, Islamic Republic of2026-03-23T10:44:33.249346+01:00 server postfix/smtps/smtpd[1548037]: warning: unknown[62.60.130.90]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=acces@langstraatonline.nl2026-03-23 09:44:33smtp,465,submission,imap,imaps,pop3,pop3stcpserver1
4022104022145.91.64.6apache-authES, Spainscan.f6.security2026-03-19 10:45:42http,httpstcpserver1

Analysis

After three days, 399 SSD attacks were registered. Reason to set a different port number for this. Port 22 is apparently very popular among hackers. Strikingly, United States with 94 at number one and China with 86 at number two together make up almost half of the attacks. Russia comes in 8th place with 14 attacks. Apache and Dovecot attacks were recorded "only" 16 and 9 times respectively in this period.