#alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET DELETED Nginx Server in use - Often Hostile Traffic"; flow:established,from_server; content:"|0d 0a|Server|3a| nginx"; nocase; threshold:type limit, seconds 60, count 3, track by_src; reference:url,doc.emergingthreats.net/2008054; classtype:bad-unknown; sid:2008054; rev:7; metadata:created_at 2010_07_30, updated_at 2010_07_30;)

Added 2018-09-13 19:39:37 UTC

Added 2018-09-13 17:53:43 UTC

#alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET DELETED Nginx Server in use - Often Hostile Traffic"; flow:established,from_server; content:"|0d 0a|Server|3a| nginx"; nocase; threshold:type limit, seconds 60, count 3, track by_src; reference:url,doc.emergingthreats.net/2008054; classtype:bad-unknown; sid:2008054; rev:7; metadata:created_at 2010_07_30, updated_at 2010_07_30;)

Added 2017-08-07 21:01:15 UTC

##alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"ET DELETED Nginx Server in use - Often Hostile Traffic"; flow:established,from_server; content:"Server|3a| nginx"; nocase; http_header; threshold:type limit, seconds 60, count 3, track by_src; reference:url,doc.emergingthreats.net/2008054; classtype:bad-unknown; sid:2008054; rev:5;)

Added 2012-01-09 22:46:49 UTC

#alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"ET POLICY Nginx Server in use - Often Hostile Traffic"; flow:established,from_server; content:"Server|3a| nginx"; nocase; http_header; threshold:type limit, seconds 60, count 3, track by_src; reference:url,doc.emergingthreats.net/2008054; classtype:bad-unknown; sid:2008054; rev:5;)

Added 2011-10-12 19:24:21 UTC

#alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"ET POLICY Nginx Server in use - Often Hostile Traffic"; flow:established,from_server; content:"Server|3a| nginx"; nocase; http_header; threshold:type limit, seconds 60, count 3, track by_src; classtype:bad-unknown; reference:url,doc.emergingthreats.net/2008054; sid:2008054; rev:5;)

Added 2011-09-14 22:37:50 UTC

#alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"ET POLICY Nginx Server in use - Often Hostile Traffic"; flow:established,from_server; content:"Server|3a| nginx"; nocase; http_header; threshold:type limit, seconds 60, count 3, track by_src; classtype:bad-unknown; reference:url,doc.emergingthreats.net/2008054; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/POLICY/POLICY_Nginx; sid:2008054; rev:5;)

Added 2011-02-04 17:27:09 UTC

#alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"ET POLICY Nginx Server in use - Often Hostile Traffic"; flow:established,from_server; content:"HTTP/1."; depth:7; content:"|0d 0a|Server\: nginx"; nocase; distance:4; within:300; threshold:type limit, seconds 60, count 3, track by_src; classtype:bad-unknown; reference:url,doc.emergingthreats.net/2008054; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/POLICY/POLICY_Nginx; sid:2008054; rev:3;)

Added 2009-02-11 19:15:23 UTC

#alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"ET POLICY Nginx Server in use - Often Hostile Traffic"; flow:established,from_server; content:"HTTP/1."; depth:7; content:"|0d 0a|Server\: nginx"; nocase; distance:4; within:300; threshold:type limit, seconds 60, count 3, track by_src; classtype:bad-unknown; reference:url,doc.emergingthreats.net/2008054; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/POLICY/POLICY_Nginx; sid:2008054; rev:3;)

Added 2009-02-11 19:15:23 UTC

#alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"ET POLICY Nginx Server in use - Often Hostile Traffic"; flow:established,from_server; content:"HTTP/1."; depth:7; content:"|0d 0a|Server\: nginx"; nocase; distance:4; within:300; threshold:type limit, seconds 60, count 3, track by_src; classtype:bad-unknown; sid:2008054; rev:2;)

Added 2008-03-28 13:33:34 UTC

Disabled by default. Nginx was too widespread to be called more often than not hostile. 2008064 and 2008065 are better fits for modified version strings of nginx.

-- MattJonkman - 28 Mar 2008

#alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"ET POLICY Nginx Server in use - Often Hostile Traffic"; flow:established,from_server; content:"HTTP/1."; depth:7; content:"|0d 0a|Server\: nginx"; nocase; distance:4; within:300; threshold:type limit, seconds 60, count 3, track by_src; classtype:bad-unknown; sid:2008054; rev:2;)

Added 2008-03-28 13:33:34 UTC

alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"ET POLICY Nginx Server in use - Often Hostile Traffic"; flow:established,from_server; content:"HTTP/1."; depth:7; content:"|0d 0a|Server\: nginx"; nocase; distance:4; within:30; threshold:type limit, seconds 60, count 3, track by_src; classtype:bad-unknown; sid:2008054; rev:1;)

Added 2008-03-26 15:01:39 UTC

http://nginx.net/

It's a legit piece of software, but it's very often used in malicious sites.

-- MattJonkman - 26 Mar 2008