Server hacked on known port Post: 303029986

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Special Forums Cybersecurity Server hacked on known port Post 303029986 by Neo on Monday 4th of February 2019 07:04:49 AM

02-04-2019

Administrator

Guys,

iptables -L lists all the rules used by iptables.

When it returns:

Code:

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

This means there are NO RULEs loaded, there are no ports being blocked. Nada. There is no filtering going on.

Nothing.

The server is wide open, based on the iptables -L output provided (from an iptables perspective).

The original poster wanted to know how a port was accessed because they thought they had iptable() working on their server.

iptables -L shows, definitively, what rules are being used, and it is case there are NO RULES.

This means, from an iptables perspective, the server is wide open.

That is why an intruder was able to gain access (not discussing, of course, any other issues on the server).

The OP apparently has written a bunch of rules, but does not understand how to enable or manage iptables().

Cheers.

Neo

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calendarserver_monitor_notifications

CALENDARSERVER_MONITOR_NOTIFICATIONS(8) 		    BSD System Manager's Manual 		   CALENDARSERVER_MONITOR_NOTIFICATIONS(8)

NAME

     calendarserver_monitor_notifications -- Darwin Calendar Server push notification monitor

SYNOPSIS

     calendarserver_monitor_notifications [--admin username] [--config file] [--host hostname] [--node pubsub-node-name] [--port port-number]
					  [--ssl] [--verbose] [--help] username

DESCRIPTION

     calendarserver_monitor_notifications is a tool for making sure XMPP push notifications are working properly.  Given a username and password
     it will connect to the calendar server and determine which pubsub node(s) correspond to that user's calendar home, as well as those of any
     user which has delegated calendar access.	Next it will subscribe to those nodes and await notifications, printing them to stdout.  An admin-
     istrator can monitor the push notifications for another user by passing the --admin option.  Exit by hitting Control-C.

OPTIONS

     -a, --admin
	   Authenticate using the credentials of the given administrator.

     -h, --help
	   Display usage information.

     -f, --config FILE
	   Use the Calendar Server configuration specified in the given file.  Defaults to /etc/caldavd/caldavd.plist.

     -H, --host HOSTNAME
	   Connect to the specified calendar server.  If not passed on the command line, the host name is looked up in the configuration file.

     -n, --node NODENAME
	   Bypass the auto-discovery of pubsub nodes and specify one explicitly.  Useful on calendar servers which don't support the push-trans-
	   ports DAV property.	When using this option, the host and port options instead refer to the XMPP server host and port numbers.

     -p, --port NUMBER
	   Connect to the specified port number.  If not passed on the command line, the port number is looked up in the configuration file.

     -s, --ssl
	   Use https to connect to calendar server (default is http).

     -v, --verbose
	   Print debugging information.

FILES

     /etc/caldavd/caldavd.plist
	   The Calendar Server configuration file.

SEE ALSO

     caldavd(8)

BSD
								    Feb 3, 2011 							       BSD