Server hacked on known port


 
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Special Forums Cybersecurity Server hacked on known port
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Old 02-04-2019
In other to help people understand this, I will flush the iptables (remove all rules) and list the results:

Code:
linux# iptables -F


linux# iptables -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination         

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination

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cachemgr.cgi(8) 					      System Manager's Manual						   cachemgr.cgi(8)

NAME
cachemgr.cgi - squid HTTP proxy manager interface SYNOPSIS
http://your.server/cgi-bin/cachemgr.cgi DESCRIPTION
The cache manager (cachemgr.cgi) is a CGI utility for displaying statistics about the Squid HTTP proxy process as it runs. The cache man- ager is a convenient way to manage the cache and view statistics without logging into the server. FILES
./cachemgr.conf @DEFAULT_CACHEMGR_CONFIG@ The access configuration file defining which Squid servers may be managed via this cachemgr.cgi program. Each line specifies a server:port followed by an optional description The server name may contain shell wildcard characters such as *, [] etc. A quick selection dropdown menu is automatically con- structed from the simple server names. Specifying :port is optional. If not specified then the default proxy port is assumed. :* or :any matches any port on the target server. SECURITY
cachemgr.cgi calls the requested server on the requested port using HTTP and returns a formatted version of the response. To avoid abuse it is recommended to configure your web server to restrict access to the cachemgr.cgi program. Configuration examples for many common web servers can be found in the Squid FAQ. SEE ALSO
squid(8) The Squid FAQ, Chapter 9 The Cache Manager Squid Web Proxy 3.1.20 cachemgr.cgi(8)