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Full Discussion: Ipfilter question
Operating Systems Solaris Ipfilter question Post 302860063 by ralome on Friday 4th of October 2013 01:41:49 PM
Old 10-04-2013
Hammer & Screwdriver Ipfilter question
Howdy

My goal is to block locally the applications on a Solaris 10 server to access specific port on a remote machine. All attempts to access the <remote ip>:<remote port> should be rejected with ICMP port unreachable or with TCP RST.

I tried with the following:

Code:
block return-icmp(port-unr) out proto tcp from any to 10.118.128.79/32 port = 1521

and

Code:
block return-rst out proto tcp from any to 10.118.128.79/32 port = 1521


In both cases connections to this IP/port are timing out instead of being rejected right on the spot.

For example the below works just fine in Linux:

Code:
# iptables -I OUTPUT -d 10.118.128.79 -p tcp --dport 1521 -j REJECT 
# telnet 10.118.128.79 1521
Trying 10.118.128.79...
telnet: connect to address 10.118.128.79: Connection refused

 

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LEARN ABOUT ULTRIX

tcp-environ

tcp-environ(5)                                                  File Formats Manual                                                 tcp-environ(5)

NAME

       tcp-environ - TCP-related environment variables

DESCRIPTION

       The  following environment variables describe a TCP connection.  They are set up by tcp-env, tcpclient, and tcpserver.  Note that TCPLOCAL-
       HOST, TCPREMOTEHOST, and TCPREMOTEINFO can contain arbitrary characters.

       PROTO
            The string TCP.

       TCPLOCALHOST
            The domain name of the local host, with uppercase letters converted to lowercase.  If there is no currently available domain name  for
            the local IP address, TCPLOCALHOST is not set.

       TCPLOCALIP
            The IP address of the local host, in dotted-decimal form.

       TCPLOCALPORT
            The local TCP port number, in decimal.

       TCPREMOTEHOST
            The domain name of the remote host, with uppercase letters converted to lowercase.  If there is no currently available domain name for
            the remote IP address, TCPREMOTEHOST is not set.

       TCPREMOTEINFO
            A connection-specific string, perhaps a username, supplied by the remote host via 931/1413/IDENT/TAP.  If the remote host did not sup-
            ply connection information, TCPREMOTEINFO is not set.

       TCPREMOTEIP
            The IP address of the remote host.

       TCPREMOTEPORT
            The remote TCP port number.

SEE ALSO

       tcpclient(1), tcpserver(1), tcp-env(1), tcp(4)

                                                                                                                                    tcp-environ(5)
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