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Advanced Networking
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That is all that is needed to make these programs talk to blacklistd.
Blacklistd Management
Blacklistd provides the user with a management utility called <citerefentry><refentrytitle>blacklistctl</refentrytitle><manvolnum>8</manvolnum></citerefentry>. It displays blocked addresses and networks that are blacklisted by the rules defined in <citerefentry><refentrytitle>blacklistd.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>. To see the list of currently blocked hosts, use <command>dump</command> combined with <option>-b</option> like this.
<prompt>#</prompt> <userinput>blacklistctl dump -b</userinput>
address/ma:port id nfail last access OK 6/3 2019/06/08 14:30:19
This example shows that there were 6 out of three permitted attempts on port 22 coming from the address range <systemitem class="netmask"></systemitem>. There are more attempts listed than are allowed because SSH allows a client to try multiple logins on a single TCP connection. A connection that is currently going on is not stopped by blacklistd. The last connection attempt is listed in the <literal>last access</literal> column of the output.
To see the remaining time that this host will be on the blacklist, add <option>-r</option> to the previous command.
<prompt>#</prompt> <userinput>blacklistctl dump -br</userinput>
address/ma:port id nfail remaining time OK 6/3 36s
In this example, there are 36s seconds left until this host will not be blocked any more.
Removing Hosts from the Block List
Sometimes it is necessary to remove a host from the block list before the remaining time expires. Unfortunately, there is no functionality in blacklistd to do that. However, it is possible to remove the address from the PF table using pfctl. For each blocked port, there is a child anchor inside the blacklistd anchor defined in <filename>/etc/pf.conf</filename>. For example, if there is a child anchor for blocking port 22 it is called <literal>blacklistd/22</literal>. There is a table inside that child anchor that contains the blocked addresses. This table is called port followed by the port number. In this example, it would be called <literal>port22</literal>. With that information at hand, it is now possible to use <citerefentry><refentrytitle>pfctl</refentrytitle><manvolnum>8</manvolnum></citerefentry> to display all addresses listed like this:
<prompt>#</prompt> <userinput>pfctl -a <replaceable>blacklistd/22</replaceable> -t <replaceable>port22</replaceable> -T show</userinput>
After identifying the address to be unblocked from the list, the following command removes it from the list:
<prompt>#</prompt> <userinput>pfctl -a <replaceable>blacklistd/22</replaceable> -t <replaceable>port22</replaceable> -T delete <replaceable></replaceable></userinput>
The address is now removed from PF, but will still show up in the blacklistctl list, since it does not know about any changes made in PF. The entry in blacklistd's database will eventually expire and be removed from its output eventually. The entry will be added again if the host is matching one of the block rules in blacklistd again.
Advanced Networking
This chapter covers a number of advanced networking topics.
The basics of gateways and routes.
How to set up USB tethering.
How to set up <trademark class="registered">IEEE</trademark> 802.11 and <trademark class="registered">Bluetooth</trademark> devices.
How to make FreeBSD act as a bridge.
How to set up network <acronym>PXE</acronym> booting.
How to set up <acronym>IPv6</acronym> on a FreeBSD machine.
How to enable and utilize the features of the Common Address Redundancy Protocol (<acronym>CARP</acronym>) in FreeBSD.
How to configure multiple <acronym>VLANs</acronym> on FreeBSD.
Configure bluetooth headset.
Understand the basics of the <filename>/etc/rc</filename> scripts.
Know how to configure and install a new FreeBSD kernel (<xref linkend="kernelconfig"/>).
Gateways and Routes
<personname> <firstname>Coranth</firstname> <surname>Gryphon</surname> </personname> <contrib>Contributed by </contrib>


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English Turkish (tr_TR)
advanced gelişmiş ileri FreeBSD Doc
GNOME (GNU Network Object Model Environment) GNU Ağ Nesne Modeli Ortamı FreeBSD Doc
internal network iç şebeke FreeBSD Doc
internal network yerel ağ FreeBSD Doc
network FreeBSD Doc
network card ethernet kartı,ağ kartı FreeBSD Doc
network file system ağ dosya sistemi FreeBSD Doc
network interface ağ arayüzü FreeBSD Doc
network monitoring ağ izleme FreeBSD Doc
network printer ağ yazıcısı FreeBSD Doc
network service ağ hizmeti FreeBSD Doc
networking service ağ hizmeti,ağ servisi FreeBSD Doc
networking subsystem ağ oluşturma alt sistemi FreeBSD Doc
raw network sockets ham ağ soketleri FreeBSD Doc
Virtual Private Network Sanal Özel Ağlar FreeBSD Doc

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