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| author | Peter Gervai <grin@grin.hu> |
|---|---|
| date | Tue, 10 Mar 2009 14:31:24 +0100 |
| parents | c7f6b056b673 |
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <HTML> <HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"> <TITLE>dccd.0.8</TITLE> <META http-equiv="Content-Style-Type" content="text/css"> <STYLE type="text/css"> BODY {background-color:white; color:black} ADDRESS {font-size:smaller} IMG.logo {width:6em; vertical-align:middle} </STYLE> </HEAD> <BODY> <PRE> <!-- Manpage converted by man2html 3.0.1 --> <B><A HREF="dccd.html">dccd(8)</A></B> Distributed Checksum Clearinghouse <B><A HREF="dccd.html">dccd(8)</A></B> </PRE> <H2><A NAME="NAME">NAME</A></H2><PRE> <B>dccd</B> -- Distributed Checksum Clearinghouse Daemon </PRE> <H2><A NAME="SYNOPSIS">SYNOPSIS</A></H2><PRE> <B>dccd</B> [<B>-64dVbfFQ</B>] <B>-i</B> <I>server-ID</I> [<B>-n</B> <I>brand</I>] [<B>-h</B> <I>homedir</I>] <B>-I</B> [<I>host-ID</I>][<I>,user</I>] [<B>-a</B> [<I>server-addr</I>][<I>,server-port</I>]] [<B>-q</B> <I>qsize</I>] [<B>-G</B> [<I>on,</I>][<I>weak-body,</I>][<I>weak-IP,</I>][<I>embargo</I>][<I>,window</I>][<I>,white</I>]] [<B>-W</B> [<I>rate</I>][<I>,chg</I>][<I>,dbsize</I>]] [<B>-K</B> [<I>no-</I>]<I>type</I>] [<B>-T</B> <I>tracemode</I>] [<B>-u</B> <I>anon-delay</I>[<I>*inflate</I>]] [<B>-C</B> <I>dbclean</I>] [<B>-L</B> <I>ltype,facility.level</I>] [<B>-R</B> [<I>RL</I><B>_</B><I>SUB</I>],[<I>RL</I><B>_</B><I>ANON</I>],[<I>RL</I><B>_</B><I>ALL</I><B>_</B><I>ANON</I>],[<I>RL</I><B>_</B><I>BUGS</I>]] </PRE> <H2><A NAME="DESCRIPTION">DESCRIPTION</A></H2><PRE> <B>Dccd</B> receives reports of checksums related to mail received by DCC clients and queries about the total number of reports of particular checksums. A DCC server never receives mail, address, headers, or other information from clients, but only cryptographically secure checksums of such information. A DCC server cannot determine the text or other infor- mation that corresponds to the checksums it receives. It only acts as a clearinghouse of total counts of checksums computed by clients. Each DCC server or close cluster of DCC servers is identified by a numeric <I>server-ID</I>. Each DCC client is identified by a <I>client-ID</I>, either explicitly listed in the <I>ids</I> file or the special anonymous client-ID. Many computers are expected to share a single <I>client-ID</I>. A <I>server-ID</I> is less than 32768 while a <I>client-ID</I> is between 32768 and 16777215. DCC server-IDs need be known only to DCC servers and the people running them. The passwords associated with DCC server-IDs should be protected, because DCC servers listen to commands authenticated with server-IDs and their associated passwords. Each client that does not use the anonymous ID must know the client-ID and password used by each of its servers. A sin- gle client computer can use different passwords with different server computers. See the <I>ids</I> file. A whitelist of known good (or bad) sources of email prevents legitimate mailing lists from being seen as unsolicited bulk email by DCC clients. The whitelist used by a DCC server is built into the database when old entries are removed by <B><A HREF="dbclean.html">dbclean(8)</A></B>. Each DCC client has its own, local whitelist, and in general, whitelists work better in DCC clients than servers. The effectiveness of a Distributed Checksum Clearinghouse increases as the number of subscribers increases. Flooding reports of checksums among DCC servers increases the effective number of subscribers to each server. Each <B>dccd</B> daemon tries to maintain TCP/IP connections to the other servers listed in the <I>flod</I> file, and send them reports containing check- sums with total counts exceeding thresholds. Changes in the <I>flod</I> file are noticed automatically within minutes. Controls on report flooding are specified in the <I>flod</I> file. Each line specifies a hostname and port number to which reports should be flooded, a server-ID to identify and authenticate the output stream, a server-ID to identify and authenticate an input stream from the same server, and flags with each ID. The ability to delete reports of checksums is handy, but could be abused. If <I>del</I> is not present among the <I>in-opts</I> options for the incoming ID, incoming delete requests are logged and then ignored. Floods from DCC "brands" that count only mail to spam traps and whose servers use the <B>-Q</B> option to count extremely bulk mail should be marked with <I>traps</I>. They can be seen as counting millions of targets, so the <I>traps</I> flag on their <I>flod</I> file entry changes their incoming flooded reports counts to <I>many.</I> <B>Dccd</B> automatically checks its <I>flod</I> and <I>ids</I> files periodically. <B><A HREF="cdcc.html">Cdcc(8)</A></B> has the commands <B>new ids</B> and <B>flood check</B> to tell <B>dccd</B> to check those two files immediately. Both files are also checked for changes after the SIGHUP signal. <A NAME="OPTIONS"><B>OPTIONS</B></A> The following options are available: <A NAME="OPTION-6"><B>-6</B></A> enable IPv6. The default is equivalent to <B>-4</B>. See also the IPv4 and IPv6 options in the <I>flod</I> file description below and the <I>IPv6</I> <I>on</I> <B><A HREF="cdcc.html">cdcc(8)</A></B> command. <A NAME="OPTION-4"><B>-4</B></A> disable IPv6. See also <B>-6</B>. <A NAME="OPTION-d"><B>-d</B></A> enables debugging output. Additional <B>-d</B> options increase the number of messages. <A NAME="OPTION-V"><B>-V</B></A> displays the version of the DCC server daemon. <A NAME="OPTION-b"><B>-b</B></A> causes the server to not detach itself from the controlling tty or put itself into the background. <A NAME="OPTION-F"><B>-F</B></A> uses write() instead of mmap() in some cases to modify the DCC data- base. It is the default on Solaris. <A NAME="OPTION-f"><B>-f</B></A> turns off <B>-F</B>. <A NAME="OPTION-Q"><B>-Q</B></A> causes the server to treat reports of checksums as queries except from DCC clients marked trusted in the <I>ids</I> file with <I>rpt-ok</I>. See <B>-u</B> to turn off access by anonymous or unauthenticated clients <A NAME="OPTION-i"><B>-i</B></A> <I>server-ID</I> specifies the ID of this DCC server. Each server identifies itself as responsible for checksums that it forwards to other servers. <A NAME="OPTION-n"><B>-n</B></A> <I>brand</I> is an arbitrary string of letters and numbers that identifies the organization running the DCC server. The brand is required, and appears in the SMTP <I>X-DCC</I> headers generated by the DCC. <A NAME="OPTION-h"><B>-h</B></A> <I>homedir</I> overrides the default DCC home directory, <I>@prefix@</I>. <A NAME="OPTION-I"><B>-I</B></A> [<I>host-ID</I>][<I>,user</I>] changes the server's globally unique identity for flooding from the default value consisting of the first 16 characters of the host name. or changes the UID and GID of the process <I>Host-ID</I> is a string of up to 16 characters that replaces the first 16 characters of the system's hostname in assertions of the server-ID that are flooded to peers. <I>User</I> must be valid user name. <A NAME="OPTION-a"><B>-a</B></A> [<I>server-addr</I>][<I>,server-port</I>] adds an hostname or IP address to the list of local IP addresses that the server answers. Multiple <B>-a</B> options can be used to specify a subset of the available network interfaces or to use more than one port number. The default without any <B>-a</B> options is to listen on all local IP addresses. It can be useful to list some of the IP addresses of multi-homed hosts to deal with firewalls. By default <I>server-port</I> is 6277 for DCC servers and 6276 for Greylist servers. It is the UDP port at which DCC requests are received and the TCP port for incoming floods of reports. If <I>server-addr</I> is absent and if the <B>getifaddrs(8)</B> function is sup- ported, separate UDP sockets are bound to each configured network interface so that each DCC clients receives replies from the IP addresses to which corresponding request are sent. If <B>dccd</B> is started before all network interfaces are turned on or there are interfaces that are turned on and off or change their addresses such as PPP interfaces, then the special string <I>@</I> should be used to tell <B>dccd</B> to bind to an IN_ADDRANY UDP socket. Outgoing TCP connections to flood checksum reports to other DCC servers used the IP address of a single <B>-a</B> option, but only if there is single option that is not localhost. See also the <I>flod</I> file. <A NAME="OPTION-q"><B>-q</B></A> <I>qsize</I> specifies the maximum size of the queue of requests from anonymous or unauthenticated clients. The default value is the maximum DCC RTT in seconds times 200 or 1000. <A NAME="OPTION-G"><B>-G</B></A> [<I>on,</I>][<I>weak-body,</I>][<I>weak-IP,</I>][<I>embargo</I>][<I>,window</I>][<I>,white</I>] changes <B>dccd</B> to a Greylist server for <B><A HREF="dccm.html">dccm(8)</A></B> or <B><A HREF="dccifd.html">dccifd(8)</A></B>. Greylisting consists of temporarily rejecting or embargoing mail from unfamiliar combinations of SMTP client IP address, SMTP enve- lope sender, and SMTP envelope recipient. If the SMTP client per- sists for <I>embargo</I> <I>seconds</I> and so is probably not an open proxy, worm-infected personal computer, or other transient source of spam, the triple of <I>(IP</I> <I>address,sender,recipient)</I> is added to a database similar to the usual DCC database. If the SMTP client does not try again after <I>embargo</I> seconds and before <I>window</I> seconds after the first attempt, the triple is forgotten. If the SMTP client persists past the embargo, the triple is added to the database and becomes familiar and the message is accepted. Familiar triples are remem- bered for <I>white</I> seconds after the last accepted mail message. The triple is forgotten if it is ever associated with unsolicited bulk email. All three durations can be a number of minutes, hours, days, or weeks followed by <I>MINUTES</I>, <I>M</I>, <I>HOURS</I>, <I>H</I>, <I>DAYS</I>, <I>D</I>, <I>WEEKS</I> or <I>W</I>. The default is <B>-G</B> <I>270seconds,7days,63days</I>. The first duration or the <I>embargo</I> should be longer than open proxies can linger retransmit- ting. The second <I>window</I> time should be as long as legitimate mail servers persist in retransmitting to recognize embargoed messages whose retransmissions were not received because of network or other problems. The <I>white</I> time should be long enough to recognize and not embargo messages from regular senders. Usually the DCC greylist system requires that an almost identical copy of the message be retransmitted during the <I>embargo</I>. If <I>weak-body</I> is present, any message with the same triple of sender IP address, sender mail address, and target mail address ends the embargo, even if the body of the message differs. If <I>weak-IP</I> is present, all mail from an SMTP client at an IP address is accept after any message from the same IP address has been accepted. Unlike DCC checksums, the contents of greylist databases are private and do not benefit from broad sharing. However, large installations can use more two or more greylist servers flooding triples among themselves. Flooding among greylist servers is controlled by the <I>grey</I><B>_</B><I>flod</I> file. All greylist cooperating or flooding greylist servers <I>must</I> use the same <B>-G</B> values. Clients of greylist servers cannot be anonymous and must have client-IDs and passwords assigned in the <I>ids</I> file. This implies that cdcc commands directed to greylist servers must specify the server-ID. White- and blacklists are honored by the DCC clients. whitelisted messages are embargoed or checked with a greylist server. The greylist triples of blacklisted messages, messages whose DCC counts make them spam, and other messages known to be spam are sent to a greylist server to be removed from the greylist database and cause an embargo on the next messages with those triples. Messages whose checksums match greylist server whitelists are not embargoed and the checksums of their triples are not added to the greylist database. The target counts of embargoed messages are reported to the DCC net- work to improve the detection of bulk mail. <A NAME="OPTION-W"><B>-W</B></A> [<I>rate</I>][<I>,chg</I>][<I>,dbsize</I>] controls quick database cleaning. If the database is larger than <I>dbsize</I>, it seems that the database has not recently and is not about to be cleaned, <B>dccd</B> is receiving fewer than <I>rate</I> requests per sec- ond, and if telling DCC clients that the database is about to be cleaned reduces that rate by <I>chg</I>%, then <B>dccd</B> starts <B><A HREF="dbclean.html">dbclean(8)</A></B> for a quick database cleaning. The cleaning is abandoned if it takes too long. The default values are equivalent to <B>-W</B> <I>1.0,40.0,RSS</I> where <I>RSS</I> is the maximum dccd resident set displayed the system log by <B>-d</B> when <B>starts</B>. <A NAME="OPTION-K"><B>-K</B></A> [<I>no-</I>]<I>type</I> marks checksums of <I>type</I> (not) be kept or counted in the database unless they appear in the whitelist. Explicit settings add to or remove from the initial contents of the list, which is equivalent to <B>-K</B> <I>Body</I> <B>-K</B> <I>Fuz1</I> <B>-K</B> <I>Fuz2</I>. <A NAME="OPTION-T"><B>-T</B></A> <I>tracemode</I> causes the server to trace or record some operations. <I>tracemode</I> must be one of the following: <I>ADMN</I> administrative requests from the control program, <B><A HREF="cdcc.html">cdcc(8)</A></B> <I>ANON</I> errors by anonymous clients <I>CLNT</I> errors by authenticated clients <I>RLIM</I> rate-limited messages <I>QUERY</I> all queries and reports <I>RIDC</I> some messages concerning the report-ID cache that is used to detect duplicate reports from clients <I>FLOOD</I> messages about inter-server flooding connections <I>FLOOD2</I> messages about flooded reports <I>IDS</I> unknown server-IDs in flooded reports <I>BL</I> requests from clients in the <I>blacklist</I> file. <I>DB</I> odd database events including long chains of duplicate checksums <I>WLIST</I> reports of whitelisted checksums from authenticated, not anonymous DCC clients The default is <I>ANON</I> <I>CLNT</I>. <A NAME="OPTION-u"><B>-u</B></A> <I>anon-delay</I>[<I>*inflate</I>] changes the number of milliseconds anonymous or unauthenticated clients must wait for answers to their queries and reports. The purpose of this delay is to discourage large anonymous clients. The <I>anon-delay</I> is multiplied by 1 plus the number of recent anonymous requests from an IP address divided by the <I>inflate</I> value. The string <I>FOREVER</I> turns off all anonymous or unauthenticated access not only for checksum queries and reports but also <B><A HREF="cdcc.html">cdcc(8)</A> stats</B> requests. A missing value for <I>inflate</I> turns off inflation. The default value is <I>50,none</I>, except when <B>-G</B> is used in which case <I>FOREVER</I> is assumed and required. <A NAME="OPTION-C"><B>-C</B></A> <I>dbclean</I> changes the default name or path of the program used to rebuild the hash table when it becomes too full. The default value is <I>@libexecdir@/dbclean</I> in the <I>@libexecdir@</I> directory. The value can include arguments as in <I>-C</I> <I>'$DCC</I><B>_</B><I>LIBEXEC/dbclean</I> <I>-F'</I>. Dbclean <I>should</I> <I>not</I> be run by <B>dccd</B> except in emergencies such as database corruption or hash table overflow. <B><A HREF="dbclean.html">Dbclean(8)</A></B> should be run daily with the @libexecdir@/cron-dccd cron script <A NAME="OPTION-L"><B>-L</B></A> <I>ltype,facility.level</I> specifies how messages should be logged. <I>Ltype</I> must be <I>error</I>, <I>info</I>, or <I>off</I> to indicate which of the two types of messages are being con- trolled or to turn off all <B>syslog(3)</B> messages from <B>dccd</B>. <I>Level</I> must be a <B>syslog(3)</B> level among <I>EMERG</I>, <I>ALERT</I>, <I>CRIT</I>, <I>ERR</I>, <I>WARNING</I>, <I>NOTICE</I>, <I>INFO</I>, and <I>DEBUG</I>. <I>Facility</I> must be among <I>AUTH</I>, <I>AUTHPRIV</I>, <I>CRON</I>, <I>DAEMON</I>, <I>FTP</I>, <I>KERN</I>, <I>LPR</I>, <I>MAIL</I>, <I>NEWS</I>, <I>USER</I>, <I>UUCP</I>, and <I>LOCAL0</I> through <I>LOCAL7</I>. The default is equivalent to <B>-L</B> <I>info,MAIL.NOTICE</I> <B>-L</B> <I>error,MAIL.ERR</I> <A NAME="OPTION-R"><B>-R</B></A> [<I>RL</I><B>_</B><I>SUB</I>],[<I>RL</I><B>_</B><I>ANON</I>],[<I>RL</I><B>_</B><I>ALL</I><B>_</B><I>ANON</I>],[<I>RL</I><B>_</B><I>BUGS</I>] sets one or more of the four rate-limits. <I>RL</I><B>_</B><I>SUB</I> limits the number of DCC transactions per second from subscribers or DCC clients with known client-IDs and passwords. This limit applies to each IP address independently. <I>RL</I><B>_</B><I>ANON</I> limits the number of DCC transactions per second from anony- mous DCC clients. This limit applies to each IP address indepen- dently. It is better to use <B>-u</B> than to change this value to exclude anonymous clients. <I>RL</I><B>_</B><I>ALL</I><B>_</B><I>ANON</I> limits the number of DCC transactions per second from all anonymous DCC clients. This limit applies to all anonymous clients as a group, regardless of their IP addresses. <I>RL</I><B>_</B><I>BUGS</I> limits the number of complaints or error messages per second for all anonymous DCC clients as a group as well as for each DCC client by IP address. The default is equivalent to <B>-R</B> <I>400,50,600,0.1</I> </PRE> <H2><A NAME="FILES">FILES</A></H2><PRE> <A NAME="FILE-@prefix@">@prefix@</A> is the DCC home directory containing data and control files. <A NAME="FILE-dcc_db">dcc_db</A> is the database of mail checksums. <A NAME="FILE-dcc_db.hash">dcc_db.hash</A> is the mail checksum database hash table. <A NAME="FILE-grey_db">grey_db</A> is the database of greylist checksums. <A NAME="FILE-grey_db.hash">grey_db.hash</A> is the greylist database hash table. <A NAME="FILE-flod">flod</A> contains lines controlling DCC flooding of the form: <I>host</I>[<I>,rport</I>][<I>;src</I>[<I>,lport</I>]] <I>rem-ID</I> [<I>passwd-ID</I> [<I>o-opt</I> [<I>i-opt</I>]]] where absent optional values are signaled with "-" and <I>host</I> is the IP address or name of a DCC server and <I>rport</I> is the name or number of the TCP port used by the remote server. <I>src</I> and <I>lport</I> are the IP address or host name and TCP port from which the outgoing flooding connection should come. Incoming flooding connections must arrive at an address and port specified with <B>-a</B>. <I>rem-id</I> is the server-ID of the remote DCC server. <I>passwd-ID</I> is a server-ID that is not assigned to a server, but whose first password is used to sign checksum reports sent to the remote system. Either of its passwords are required with incoming reports. If it is absent or "-", outgoing floods are signed with the first password of the local server in the <I>ids</I> file and incoming floods must be signed with either password of the remote server-ID. <I>i-opt</I> and <I>o-opt</I> are comma separated lists of <I>off</I> turns off flooding to the remote or local system. <I>traps</I> indicates that the remote sending or local receiv- ing system has only spam traps. <I>no-del</I> says checksum delete requests are refused by the remote or local server and so turns off sending or accepting delete requests, respectively. By default, delete requests are sent to remote servers and accepted in incoming floods if and only if the peers are exchanging DCC reputations. <I>del</I> says delete requests are accepted by the remote or local server. <I>no-log-del</I> turns off logging of incoming requests to delete checksums. <I>passive</I> is used to tell a server outside a firewall to expect a peer inside to create both of the pair of input and output TCP connections used for flooding. The peer inside the firewall should use <I>SOCKS</I> or <I>NAT</I> on its <I>flod</I> file entry for this system. <I>SOCKS</I> is used to tell a server inside a firewall that it should create both of the TCP connections used for flooding and that SOCKS protocol should be used. The peer outside the firewall should use <I>passive</I> on its <I>flod</I> file entry for this system. <I>NAT</I> differs from <I>SOCKS</I> only by not using the SOCKS proto- col. <I>ID1->ID2</I> converts server-ID <I>ID1</I> in flooded reports to server-ID <I>ID2</I>. Either <I>ID1</I> or <I>ID2</I> may be the string `self' to specify the server's own ID. <I>ID1</I> can be the string `all' to specify all server-IDs or a pair of server-IDs separated by a dash to specify an inclusive range. <I>ID2</I> can be the string `ok' to send or receive reports without translation or the string `reject' to not send outgoing or refuse incoming reports. Only the first matching conversion is applied. For example, when `self->ok,all->reject' is applied to a locally generated report, the first con- version is applied and the second is ignored. <I>leaf=path-len</I> does not send reports with paths longer than <I>path-len</I> server-IDs. <I>IPv4</I> overrides a <B>-6</B> setting for this flooding peer. <I>IPv6</I> overrides the default or an explicit <B>-4</B> setting. <I>vers</I> specifies the version of the DCC flooding protocol used by the remote DCC server with a string such as `version2'. <I>trace</I> sends information about a single peer like the <B><A HREF="cdcc.html">cdcc(8)</A></B> command <B>trace FLOOD on</B> does for all peers. <I>trace2</I> sends information about individual flooded reports like the <B><A HREF="cdcc.html">cdcc(8)</A></B> command <B>trace FLOOD2 on</B> does for all peers. <A NAME="FILE-grey_flod">grey_flod</A> is the equivalent of <I>flod</I> used by <B>dccd</B> when it is a greylist server. <A NAME="FILE-flod.map">flod.map</A> is an automatically generated file in which <B>dccd</B> records its progress sending or flooding reports to DCC peers. <A NAME="FILE-grey_flod.map">grey_flod.map</A> is the equivalent of <I>flod.map</I> <I>used</I> <I>by</I> <B>dccd</B> when it is a greylist server. <A NAME="FILE-ids">ids</A> contains the IDs and passwords known by the DCC server. An <I>ids</I> file that can be read by others cannot be used. It contains blank lines, comments starting with "#" and lines of the form: <I>id</I>[<I>,rpt-ok</I>][<I>,delay=ms</I>[<I>*inflate</I>]] <I>passwd1</I> [<I>passwd2</I>] where <I>id</I> is a DCC <I>client-ID</I> or <I>server-ID</I>. <I>Rpt-ok</I> if present overrides <B>-Q</B> by saying that this client is trusted to report only checksums for unsolicited bulk mail. <I>delay=ms</I>[<I>*inflate</I>] delays answers to systems using the client <I>id</I>. The <I>delay</I> in milliseconds is multiplied by 1 plus the number of recent requests from an IP address using <I>id</I> divided by the <I>inflate</I> value. See <B>-u</B>. <I>passwd1</I> is the password currently used by clients with identi- fier <I>id</I>. It is a 1 to 32 character string that does not contain blank, tab, newline or carriage return characters. <I>passwd2</I> is the optional next password that those clients will use. A DCC server accepts either password if both are present in the file. Both passwords can be absent if the entry not used except to tell <B>dccd</B> that server-IDs in the flooded reports are valid. The string <I>unknown</I> is equivalent to the null string. <A NAME="FILE-whitelist">whitelist</A> contains the DCC server whitelist. It is not used directly but is loaded into the database when <B><A HREF="dbclean.html">dbclean(8)</A></B> is run. <A NAME="FILE-grey_whitelist">grey_whitelist</A> contains the greylist server whitelist. It is not used directly but is loaded into the database when <B><A HREF="dbclean.html">dbclean(8)</A></B> is run with <B>-G</B>. <A NAME="FILE-blacklist">blacklist</A> if present, contains a list of IP addresses and blocks of IP addresses DCC clients that are ignored. Each line in the file should be blank, a comment starting with '#', or an IP address or block of IP addresses in the form [<I>trace,</I>] [<I>ok,</I>] [<I>bad</I>] xxx.xxx.xxx.xxx[/yy] Changes to the file are automatically noticed and acted upon within a few minutes. Addresses or blocks of addresses can be preceded with <I>ok</I> to "punch holes" in blacklisted blocks or with <I>trace</I> to log activity. This mechanism is intended for no more than a few dozen blocks of addresses. <A NAME="FILE-dccd_clients">dccd_clients</A> contains client IP addresses and activity counts. <A NAME="FILE-grey_clients">grey_clients</A> contains greylist client IP addresses and activity counts. </PRE> <H2><A NAME="EXAMPLES">EXAMPLES</A></H2><PRE> <B>dccd</B> is usually started with other system daemons with something like the script <I>@libexecdir@/rcDCC</I>. That scripts uses values in @prefix@/dcc_conf to start the server. With the argument <I>stop</I>, <I>@libexecdir@/rcDCC</I> can be used to stop the daemon. The database grows too large unless old reports are removed. <B><A HREF="dbclean.html">dbclean(8)</A></B> should be run daily with the @libexecdir@/cron-dccd cron script </PRE> <H2><A NAME="SEE-ALSO">SEE ALSO</A></H2><PRE> <B><A HREF="cdcc.html">cdcc(8)</A></B>, <B><A HREF="dcc.html">dcc(8)</A></B>, <B><A HREF="dbclean.html">dbclean(8)</A></B>, <B><A HREF="dblist.html">dblist(8)</A></B>, <B><A HREF="dccifd.html">dccifd(8)</A></B>, <B><A HREF="dccm.html">dccm(8)</A></B>, <B><A HREF="dccproc.html">dccproc(8)</A></B>. <B><A HREF="dccsight.html">dccsight(8)</A></B>, </PRE> <H2><A NAME="HISTORY">HISTORY</A></H2><PRE> <B>dccd</B> is based on an idea from Paul Vixie. It was designed and written at Rhyolite Software, starting in 2000. This document describes version 1.3.103. February 26, 2009 </PRE> <HR> <ADDRESS> Man(1) output converted with <a href="http://www.oac.uci.edu/indiv/ehood/man2html.html">man2html</a> modified for the DCC $Date 2001/04/29 03:22:18 $ <BR> <A HREF="http://www.dcc-servers.net/dcc/"> <IMG SRC="http://logos.dcc-servers.net/border.png" class=logo ALT="DCC logo"> </A> <A HREF="http://validator.w3.org/check?uri=referer"> <IMG class=logo ALT="Valid HTML 4.01 Strict" SRC="http://www.w3.org/Icons/valid-html401"> </A> </ADDRESS> </BODY> </HTML>