IPV6_README.html revision 1.1.1.1.4.2
1 1.1.1.1.4.2 matt <!doctype html public "-//W3C//DTD HTML 4.01 Transitional//EN" 2 1.1.1.1.4.2 matt "http://www.w3.org/TR/html4/loose.dtd"> 3 1.1.1.1.4.2 matt 4 1.1.1.1.4.2 matt <html> 5 1.1.1.1.4.2 matt 6 1.1.1.1.4.2 matt <head> 7 1.1.1.1.4.2 matt 8 1.1.1.1.4.2 matt <title>Postfix IPv6 Support</title> 9 1.1.1.1.4.2 matt 10 1.1.1.1.4.2 matt <meta http-equiv="Content-Type" content="text/html; charset=us-ascii"> 11 1.1.1.1.4.2 matt 12 1.1.1.1.4.2 matt </head> 13 1.1.1.1.4.2 matt 14 1.1.1.1.4.2 matt <body> 15 1.1.1.1.4.2 matt 16 1.1.1.1.4.2 matt <h1><img src="postfix-logo.jpg" width="203" height="98" ALT="">Postfix 17 1.1.1.1.4.2 matt IPv6 Support</h1> 18 1.1.1.1.4.2 matt 19 1.1.1.1.4.2 matt <hr> 20 1.1.1.1.4.2 matt 21 1.1.1.1.4.2 matt <h2>Introduction</h2> 22 1.1.1.1.4.2 matt 23 1.1.1.1.4.2 matt <p> Postfix 2.2 introduces support for the IPv6 (IP version 6) 24 1.1.1.1.4.2 matt protocol. IPv6 support for older Postfix versions was available as 25 1.1.1.1.4.2 matt an add-on patch. The section "<a href="#compat">Compatibility with 26 1.1.1.1.4.2 matt Postfix <2.2 IPv6 support</a>" below discusses the differences 27 1.1.1.1.4.2 matt between these implementations. </p> 28 1.1.1.1.4.2 matt 29 1.1.1.1.4.2 matt <p> The main feature of interest is that IPv6 uses 128-bit IP 30 1.1.1.1.4.2 matt addresses instead of the 32-bit addresses used by IPv4. It can 31 1.1.1.1.4.2 matt therefore accommodate a much larger number of hosts and networks 32 1.1.1.1.4.2 matt without ugly kluges such as NAT. A side benefit of the much larger 33 1.1.1.1.4.2 matt address space is that it makes random network scanning impractical. 34 1.1.1.1.4.2 matt </p> 35 1.1.1.1.4.2 matt 36 1.1.1.1.4.2 matt <p> Postfix uses the same SMTP protocol over IPv6 as it already 37 1.1.1.1.4.2 matt uses over the older IPv4 network, and does AAAA record lookups in 38 1.1.1.1.4.2 matt the DNS in addition to the older A records. Information about IPv6 39 1.1.1.1.4.2 matt can be found at <a href="http://www.ipv6.org/">http://www.ipv6.org/</a>. </p> 40 1.1.1.1.4.2 matt 41 1.1.1.1.4.2 matt <p> This document provides information on the following topics: 42 1.1.1.1.4.2 matt </p> 43 1.1.1.1.4.2 matt 44 1.1.1.1.4.2 matt <ul> 45 1.1.1.1.4.2 matt 46 1.1.1.1.4.2 matt <li><a href="#platforms">Supported platforms</a> 47 1.1.1.1.4.2 matt 48 1.1.1.1.4.2 matt <li><a href="#configuration">Configuration</a> 49 1.1.1.1.4.2 matt 50 1.1.1.1.4.2 matt <li><a href="#limitations">Known limitations</a> 51 1.1.1.1.4.2 matt 52 1.1.1.1.4.2 matt <li><a href="#compat">Compatibility with Postfix <2.2 IPv6 support</a> 53 1.1.1.1.4.2 matt 54 1.1.1.1.4.2 matt <li><a href="#porting">IPv6 Support for unsupported platforms</a> 55 1.1.1.1.4.2 matt 56 1.1.1.1.4.2 matt <li><a href="#credits">Credits</a> 57 1.1.1.1.4.2 matt 58 1.1.1.1.4.2 matt </ul> 59 1.1.1.1.4.2 matt 60 1.1.1.1.4.2 matt <h2><a name="platforms">Supported Platforms</a></h2> 61 1.1.1.1.4.2 matt 62 1.1.1.1.4.2 matt <p> Postfix version 2.2 supports IPv4 and IPv6 on the following 63 1.1.1.1.4.2 matt platforms: </p> 64 1.1.1.1.4.2 matt 65 1.1.1.1.4.2 matt <ul> 66 1.1.1.1.4.2 matt 67 1.1.1.1.4.2 matt <li> AIX 5.1+ 68 1.1.1.1.4.2 matt <li> Darwin 7.3+ 69 1.1.1.1.4.2 matt <li> FreeBSD 4+ 70 1.1.1.1.4.2 matt <li> Linux 2.4+ 71 1.1.1.1.4.2 matt <li> NetBSD 1.5+ 72 1.1.1.1.4.2 matt <li> OpenBSD 2+ 73 1.1.1.1.4.2 matt <li> Solaris 8+ 74 1.1.1.1.4.2 matt <li> Tru64Unix V5.1+ 75 1.1.1.1.4.2 matt 76 1.1.1.1.4.2 matt </ul> 77 1.1.1.1.4.2 matt 78 1.1.1.1.4.2 matt <p> On other platforms Postfix will simply use IPv4 as it has always 79 1.1.1.1.4.2 matt done. </p> 80 1.1.1.1.4.2 matt 81 1.1.1.1.4.2 matt <p> See <a href="#porting">below</a> for tips how to port Postfix 82 1.1.1.1.4.2 matt IPv6 support to other environments. </p> 83 1.1.1.1.4.2 matt 84 1.1.1.1.4.2 matt <h2><a name="configuration">Configuration</a></h2> 85 1.1.1.1.4.2 matt 86 1.1.1.1.4.2 matt <p> Postfix IPv6 support introduces two new <a href="postconf.5.html">main.cf</a> configuration 87 1.1.1.1.4.2 matt parameters, and introduces an important change in address syntax 88 1.1.1.1.4.2 matt notation in match lists such as <a href="postconf.5.html#mynetworks">mynetworks</a> or 89 1.1.1.1.4.2 matt <a href="postconf.5.html#debug_peer_list">debug_peer_list</a>. </p> 90 1.1.1.1.4.2 matt 91 1.1.1.1.4.2 matt <p> Postfix IPv6 address syntax is a little tricky, because there 92 1.1.1.1.4.2 matt are a few places where you must enclose an IPv6 address inside 93 1.1.1.1.4.2 matt "<tt>[]</tt>" characters, and a few places where you must not. It is 94 1.1.1.1.4.2 matt a good idea to use "<tt>[]</tt>" only in the few places where you 95 1.1.1.1.4.2 matt have to. Check out the <a href="postconf.5.html">postconf(5)</a> manual whenever you do IPv6 96 1.1.1.1.4.2 matt related configuration work with Postfix. </p> 97 1.1.1.1.4.2 matt 98 1.1.1.1.4.2 matt <ul> 99 1.1.1.1.4.2 matt 100 1.1.1.1.4.2 matt <li> <p> Instead of hard-coding 127.0.0.1 and ::1 loopback addresses 101 1.1.1.1.4.2 matt in <a href="master.5.html">master.cf</a>, specify "<a href="postconf.5.html#inet_interfaces">inet_interfaces</a> = loopback-only" in <a href="postconf.5.html">main.cf</a>. 102 1.1.1.1.4.2 matt This way you can use the same <a href="master.5.html">master.cf</a> file regardless of whether 103 1.1.1.1.4.2 matt or not Postfix will run on an IPv6-enabled system. </p> 104 1.1.1.1.4.2 matt 105 1.1.1.1.4.2 matt <li> <p> The first new parameter is called <a href="postconf.5.html#inet_protocols">inet_protocols</a>. This 106 1.1.1.1.4.2 matt specifies what protocols Postfix will use when it makes or accepts 107 1.1.1.1.4.2 matt network connections, and also controls what DNS lookups Postfix 108 1.1.1.1.4.2 matt will use when it makes network connections. </p> 109 1.1.1.1.4.2 matt 110 1.1.1.1.4.2 matt <blockquote> 111 1.1.1.1.4.2 matt <pre> 112 1.1.1.1.4.2 matt /etc/postfix/<a href="postconf.5.html">main.cf</a>: 113 1.1.1.1.4.2 matt # You must stop/start Postfix after changing this parameter. 114 1.1.1.1.4.2 matt <a href="postconf.5.html#inet_protocols">inet_protocols</a> = ipv4 (DEFAULT: enable IPv4 only) 115 1.1.1.1.4.2 matt <a href="postconf.5.html#inet_protocols">inet_protocols</a> = all (enable IPv4, and IPv6 if supported) 116 1.1.1.1.4.2 matt <a href="postconf.5.html#inet_protocols">inet_protocols</a> = ipv4, ipv6 (enable both IPv4 and IPv6) 117 1.1.1.1.4.2 matt <a href="postconf.5.html#inet_protocols">inet_protocols</a> = ipv6 (enable IPv6 only) 118 1.1.1.1.4.2 matt </pre> 119 1.1.1.1.4.2 matt </blockquote> 120 1.1.1.1.4.2 matt 121 1.1.1.1.4.2 matt <p> By default, Postfix uses IPv4 only, because most systems aren't 122 1.1.1.1.4.2 matt attached to an IPv6 network. </p> 123 1.1.1.1.4.2 matt 124 1.1.1.1.4.2 matt <ul> 125 1.1.1.1.4.2 matt 126 1.1.1.1.4.2 matt <li> <p> On systems with combined IPv4/IPv6 stacks, attempts to 127 1.1.1.1.4.2 matt deliver mail via IPv6 would always fail with "network unreachable", 128 1.1.1.1.4.2 matt and those attempts would only slow down Postfix. </p> 129 1.1.1.1.4.2 matt 130 1.1.1.1.4.2 matt <li> <p> Linux kernels don't even load IPv6 protocol support by 131 1.1.1.1.4.2 matt default. Any attempt to use it would fail immediately. </p> 132 1.1.1.1.4.2 matt 133 1.1.1.1.4.2 matt </ul> 134 1.1.1.1.4.2 matt 135 1.1.1.1.4.2 matt <p> Note 1: you must stop and start Postfix after changing the 136 1.1.1.1.4.2 matt <a href="postconf.5.html#inet_protocols">inet_protocols</a> configuration parameter. </p> 137 1.1.1.1.4.2 matt 138 1.1.1.1.4.2 matt <p> Note 2: if you see error messages like the following, then 139 1.1.1.1.4.2 matt you're running Linux and need to turn on IPv6 in the kernel: see 140 1.1.1.1.4.2 matt <a href="http://www.ipv6.org/">http://www.ipv6.org/</a> for hints and tips. Unlike other systems, 141 1.1.1.1.4.2 matt Linux does not have a combined stack for IPv4 and IPv6, and IPv6 142 1.1.1.1.4.2 matt protocol support is not loaded by default. </p> 143 1.1.1.1.4.2 matt 144 1.1.1.1.4.2 matt <blockquote> 145 1.1.1.1.4.2 matt <pre> 146 1.1.1.1.4.2 matt postconf: warning: <a href="postconf.5.html#inet_protocols">inet_protocols</a>: IPv6 support is disabled: Address family not supported by protocol 147 1.1.1.1.4.2 matt postconf: warning: <a href="postconf.5.html#inet_protocols">inet_protocols</a>: configuring for IPv4 support only 148 1.1.1.1.4.2 matt </pre> 149 1.1.1.1.4.2 matt </blockquote> 150 1.1.1.1.4.2 matt 151 1.1.1.1.4.2 matt <p> Note 3: on older Linux and Solaris systems, the setting 152 1.1.1.1.4.2 matt "<a href="postconf.5.html#inet_protocols">inet_protocols</a> = ipv6" will not prevent Postfix from 153 1.1.1.1.4.2 matt accepting IPv4 connections. Postfix will present the client IP 154 1.1.1.1.4.2 matt addresses in IPv6 format, though. In all other cases, Postfix always 155 1.1.1.1.4.2 matt presents IPv4 client IP addresses in the traditional dotted quad 156 1.1.1.1.4.2 matt IPv4 format. </p> 157 1.1.1.1.4.2 matt 158 1.1.1.1.4.2 matt <li> <p> The other new parameter is <a href="postconf.5.html#smtp_bind_address6">smtp_bind_address6</a>. 159 1.1.1.1.4.2 matt This sets the local interface address for outgoing IPv6 SMTP 160 1.1.1.1.4.2 matt connections, just like the <a href="postconf.5.html#smtp_bind_address">smtp_bind_address</a> parameter 161 1.1.1.1.4.2 matt does for IPv4: </p> 162 1.1.1.1.4.2 matt 163 1.1.1.1.4.2 matt <blockquote> 164 1.1.1.1.4.2 matt <pre> 165 1.1.1.1.4.2 matt /etc/postfix/<a href="postconf.5.html">main.cf</a>: 166 1.1.1.1.4.2 matt <a href="postconf.5.html#smtp_bind_address6">smtp_bind_address6</a> = 2001:240:587:0:250:56ff:fe89:1 167 1.1.1.1.4.2 matt </pre> 168 1.1.1.1.4.2 matt </blockquote> 169 1.1.1.1.4.2 matt 170 1.1.1.1.4.2 matt <li> <p> If you left the value of the <a href="postconf.5.html#mynetworks">mynetworks</a> parameter at its 171 1.1.1.1.4.2 matt default (i.e. no <a href="postconf.5.html#mynetworks">mynetworks</a> setting in <a href="postconf.5.html">main.cf</a>) Postfix will figure 172 1.1.1.1.4.2 matt out by itself what its network addresses are. This is what a typical 173 1.1.1.1.4.2 matt setting looks like: </p> 174 1.1.1.1.4.2 matt 175 1.1.1.1.4.2 matt <blockquote> 176 1.1.1.1.4.2 matt <pre> 177 1.1.1.1.4.2 matt % postconf <a href="postconf.5.html#mynetworks">mynetworks</a> 178 1.1.1.1.4.2 matt <a href="postconf.5.html#mynetworks">mynetworks</a> = 127.0.0.0/8 168.100.189.0/28 [::1]/128 [fe80::]/10 [2001:240:587::]/64 179 1.1.1.1.4.2 matt </pre> 180 1.1.1.1.4.2 matt </blockquote> 181 1.1.1.1.4.2 matt 182 1.1.1.1.4.2 matt <p> If you did specify the <a href="postconf.5.html#mynetworks">mynetworks</a> parameter value in 183 1.1.1.1.4.2 matt <a href="postconf.5.html">main.cf</a>, you need update the <a href="postconf.5.html#mynetworks">mynetworks</a> value to include 184 1.1.1.1.4.2 matt the IPv6 networks the system is in. Be sure to specify IPv6 address 185 1.1.1.1.4.2 matt information inside "<tt>[]</tt>", like this: </p> 186 1.1.1.1.4.2 matt 187 1.1.1.1.4.2 matt <blockquote> 188 1.1.1.1.4.2 matt <pre> 189 1.1.1.1.4.2 matt /etc/postfix/<a href="postconf.5.html">main.cf</a>: 190 1.1.1.1.4.2 matt <a href="postconf.5.html#mynetworks">mynetworks</a> = ...<i>IPv4 networks</i>... [::1]/128 [2001:240:587::]/64 ... 191 1.1.1.1.4.2 matt </pre> 192 1.1.1.1.4.2 matt </blockquote> 193 1.1.1.1.4.2 matt 194 1.1.1.1.4.2 matt </ul> 195 1.1.1.1.4.2 matt 196 1.1.1.1.4.2 matt <p> <b> NOTE: when configuring Postfix match lists such as 197 1.1.1.1.4.2 matt <a href="postconf.5.html#mynetworks">mynetworks</a> or <a href="postconf.5.html#debug_peer_list">debug_peer_list</a>, you must specify 198 1.1.1.1.4.2 matt IPv6 address information inside "<tt>[]</tt>" in the <a href="postconf.5.html">main.cf</a> parameter 199 1.1.1.1.4.2 matt value and in files specified with a "<i>/file/name</i>" pattern. 200 1.1.1.1.4.2 matt IPv6 addresses contain the ":" character, and would otherwise be 201 1.1.1.1.4.2 matt confused with a "<i><a href="DATABASE_README.html">type:table</a></i>" pattern. </b> </p> 202 1.1.1.1.4.2 matt 203 1.1.1.1.4.2 matt <h2><a name="limitations">Known Limitations</a></h2> 204 1.1.1.1.4.2 matt 205 1.1.1.1.4.2 matt <ul> 206 1.1.1.1.4.2 matt 207 1.1.1.1.4.2 matt <li> <p> The order of IPv6/IPv4 outgoing connection attempts is 208 1.1.1.1.4.2 matt not yet configurable. Currently, IPv6 is tried before IPv4. </p> 209 1.1.1.1.4.2 matt 210 1.1.1.1.4.2 matt <li> <p> Postfix currently does not support DNSBL (real-time 211 1.1.1.1.4.2 matt blackhole list) lookups for IPv6 client IP addresses; currently 212 1.1.1.1.4.2 matt there are no blacklists that cover the IPv6 address space. </p> 213 1.1.1.1.4.2 matt 214 1.1.1.1.4.2 matt <li> <p> IPv6 does not have class A, B, C, etc. networks. With IPv6 215 1.1.1.1.4.2 matt networks, the setting "<a href="postconf.5.html#mynetworks_style">mynetworks_style</a> = class" has the 216 1.1.1.1.4.2 matt same effect as the setting "<a href="postconf.5.html#mynetworks_style">mynetworks_style</a> = subnet". 217 1.1.1.1.4.2 matt </p> 218 1.1.1.1.4.2 matt 219 1.1.1.1.4.2 matt <li> <p> On Tru64Unix and AIX, Postfix can't figure out the local 220 1.1.1.1.4.2 matt subnet mask 221 1.1.1.1.4.2 matt and always assumes a /128 network. This is a problem only with 222 1.1.1.1.4.2 matt "<a href="postconf.5.html#mynetworks_style">mynetworks_style</a> = subnet" and no explicit <a href="postconf.5.html#mynetworks">mynetworks</a> 223 1.1.1.1.4.2 matt setting in <a href="postconf.5.html">main.cf</a>. </p> 224 1.1.1.1.4.2 matt 225 1.1.1.1.4.2 matt </ul> 226 1.1.1.1.4.2 matt 227 1.1.1.1.4.2 matt <h2> <a name="compat">Compatibility with Postfix <2.2 IPv6 support</a> 228 1.1.1.1.4.2 matt </h2> 229 1.1.1.1.4.2 matt 230 1.1.1.1.4.2 matt <p> Postfix version 2.2 IPv6 support is based on the Postfix/IPv6 patch 231 1.1.1.1.4.2 matt by Dean Strik and others, but differs in a few minor ways. </p> 232 1.1.1.1.4.2 matt 233 1.1.1.1.4.2 matt <ul> 234 1.1.1.1.4.2 matt 235 1.1.1.1.4.2 matt <li> <p> <a href="postconf.5.html">main.cf</a>: The <a href="postconf.5.html#inet_interfaces">inet_interfaces</a> parameter does not support 236 1.1.1.1.4.2 matt the notation "ipv6:all" or "ipv4:all". Use the 237 1.1.1.1.4.2 matt <a href="postconf.5.html#inet_protocols">inet_protocols</a> parameter instead. </p> 238 1.1.1.1.4.2 matt 239 1.1.1.1.4.2 matt <li> <p> <a href="postconf.5.html">main.cf</a>: Specify "<a href="postconf.5.html#inet_protocols">inet_protocols</a> = all" or 240 1.1.1.1.4.2 matt "<a href="postconf.5.html#inet_protocols">inet_protocols</a> = ipv4, ipv6" in order to enable both IPv4 241 1.1.1.1.4.2 matt and IPv6 support. </p> 242 1.1.1.1.4.2 matt 243 1.1.1.1.4.2 matt <li> <p> <a href="postconf.5.html">main.cf</a>: The <a href="postconf.5.html#inet_protocols">inet_protocols</a> parameter also controls 244 1.1.1.1.4.2 matt what DNS lookups Postfix will attempt to make when delivering or 245 1.1.1.1.4.2 matt receiving mail. </p> 246 1.1.1.1.4.2 matt 247 1.1.1.1.4.2 matt <li> <p> <a href="postconf.5.html">main.cf</a>: Specify "<a href="postconf.5.html#inet_interfaces">inet_interfaces</a> = loopback-only" 248 1.1.1.1.4.2 matt to listen on loopback network interfaces only. </p> 249 1.1.1.1.4.2 matt 250 1.1.1.1.4.2 matt <li> <p> The <a href="postconf.5.html#lmtp_bind_address">lmtp_bind_address</a> and <a href="postconf.5.html#lmtp_bind_address6">lmtp_bind_address6</a> 251 1.1.1.1.4.2 matt features were omitted. The Postfix LMTP client will be absorbed 252 1.1.1.1.4.2 matt into the SMTP client, so there is no reason to keep adding features 253 1.1.1.1.4.2 matt to the LMTP client. </p> 254 1.1.1.1.4.2 matt 255 1.1.1.1.4.2 matt <li> <p> The SMTP server now requires that IPv6 addresses in SMTP 256 1.1.1.1.4.2 matt commands are specified as [ipv6:<i>ipv6address</i>], as 257 1.1.1.1.4.2 matt described in <a href="http://tools.ietf.org/html/rfc2821">RFC 2821</a>. </p> 258 1.1.1.1.4.2 matt 259 1.1.1.1.4.2 matt <li> <p> The IPv6 network address matching code was rewritten from 260 1.1.1.1.4.2 matt the ground up, and is expected to be closer to the specification. 261 1.1.1.1.4.2 matt The result may be incompatible with the Postfix/IPv6 patch. 262 1.1.1.1.4.2 matt </p> 263 1.1.1.1.4.2 matt 264 1.1.1.1.4.2 matt </ul> 265 1.1.1.1.4.2 matt 266 1.1.1.1.4.2 matt <h2><a name="porting">IPv6 Support for unsupported platforms</a></h2> 267 1.1.1.1.4.2 matt 268 1.1.1.1.4.2 matt <p> Getting Postfix IPv6 working on other platforms involves the 269 1.1.1.1.4.2 matt following steps: </p> 270 1.1.1.1.4.2 matt 271 1.1.1.1.4.2 matt <ul> 272 1.1.1.1.4.2 matt 273 1.1.1.1.4.2 matt <li> <p> Specify how Postfix should find the local network interfaces. 274 1.1.1.1.4.2 matt Postfix needs this information to avoid mailer loops and to find out 275 1.1.1.1.4.2 matt if mail for <i>user@[ipaddress]</i> is a local or remote destination. </p> 276 1.1.1.1.4.2 matt 277 1.1.1.1.4.2 matt <p> If your system has the getifaddrs() routine then add 278 1.1.1.1.4.2 matt the following to your platform-specific section in 279 1.1.1.1.4.2 matt src/util/sys_defs.h: </p> 280 1.1.1.1.4.2 matt 281 1.1.1.1.4.2 matt <blockquote> 282 1.1.1.1.4.2 matt <pre> 283 1.1.1.1.4.2 matt #ifndef NO_IPV6 284 1.1.1.1.4.2 matt # define HAS_IPV6 285 1.1.1.1.4.2 matt # define HAVE_GETIFADDRS 286 1.1.1.1.4.2 matt #endif 287 1.1.1.1.4.2 matt </pre> 288 1.1.1.1.4.2 matt </blockquote> 289 1.1.1.1.4.2 matt 290 1.1.1.1.4.2 matt <p> Otherwise, if your system has the SIOCGLIF ioctl() 291 1.1.1.1.4.2 matt command in /usr/include/*/*.h, add the following to your 292 1.1.1.1.4.2 matt platform-specific section in src/util/sys_defs.h: </p> 293 1.1.1.1.4.2 matt 294 1.1.1.1.4.2 matt <blockquote> 295 1.1.1.1.4.2 matt <pre> 296 1.1.1.1.4.2 matt #ifndef NO_IPV6 297 1.1.1.1.4.2 matt # define HAS_IPV6 298 1.1.1.1.4.2 matt # define HAS_SIOCGLIF 299 1.1.1.1.4.2 matt #endif 300 1.1.1.1.4.2 matt </pre> 301 1.1.1.1.4.2 matt </blockquote> 302 1.1.1.1.4.2 matt 303 1.1.1.1.4.2 matt <p> Otherwise, Postfix will have to use the old SIOCGIF commands 304 1.1.1.1.4.2 matt and get along with reduced IPv6 functionality (it won't be able to 305 1.1.1.1.4.2 matt figure out your IPv6 netmasks, which are needed for "<a href="postconf.5.html#mynetworks_style">mynetworks_style</a> 306 1.1.1.1.4.2 matt = subnet". Add this to your platform-specific section in 307 1.1.1.1.4.2 matt src/util/sys_defs.h: </p> 308 1.1.1.1.4.2 matt 309 1.1.1.1.4.2 matt <blockquote> 310 1.1.1.1.4.2 matt <pre> 311 1.1.1.1.4.2 matt #ifndef NO_IPV6 312 1.1.1.1.4.2 matt # define HAS_IPV6 313 1.1.1.1.4.2 matt #endif 314 1.1.1.1.4.2 matt </pre> 315 1.1.1.1.4.2 matt </blockquote> 316 1.1.1.1.4.2 matt 317 1.1.1.1.4.2 matt <li> <p> Test if Postfix can figure out its interface information. </p> 318 1.1.1.1.4.2 matt 319 1.1.1.1.4.2 matt <p> After compiling Postfix in the usual manner, step into the 320 1.1.1.1.4.2 matt src/util directory and type "<b>make inet_addr_local</b>". 321 1.1.1.1.4.2 matt Running this file by hand should produce all the interface addresses 322 1.1.1.1.4.2 matt and network masks, for example: </p> 323 1.1.1.1.4.2 matt 324 1.1.1.1.4.2 matt <blockquote> 325 1.1.1.1.4.2 matt <pre> 326 1.1.1.1.4.2 matt % make 327 1.1.1.1.4.2 matt % cd src/util 328 1.1.1.1.4.2 matt % make inet_addr_local 329 1.1.1.1.4.2 matt [... some messages ...] 330 1.1.1.1.4.2 matt % ./inet_addr_local 331 1.1.1.1.4.2 matt [... some messages ...] 332 1.1.1.1.4.2 matt ./inet_addr_local: inet_addr_local: configured 2 IPv4 addresses 333 1.1.1.1.4.2 matt ./inet_addr_local: inet_addr_local: configured 4 IPv6 addresses 334 1.1.1.1.4.2 matt 168.100.189.2/255.255.255.224 335 1.1.1.1.4.2 matt 127.0.0.1/255.0.0.0 336 1.1.1.1.4.2 matt fe80:1::2d0:b7ff:fe88:2ca7/ffff:ffff:ffff:ffff:: 337 1.1.1.1.4.2 matt 2001:240:587:0:2d0:b7ff:fe88:2ca7/ffff:ffff:ffff:ffff:: 338 1.1.1.1.4.2 matt fe80:5::1/ffff:ffff:ffff:ffff:: 339 1.1.1.1.4.2 matt ::1/ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 340 1.1.1.1.4.2 matt </pre> 341 1.1.1.1.4.2 matt </blockquote> 342 1.1.1.1.4.2 matt 343 1.1.1.1.4.2 matt <p> The above is for an old FreeBSD machine. Other systems produce 344 1.1.1.1.4.2 matt slightly different results, but you get the idea. </p> 345 1.1.1.1.4.2 matt 346 1.1.1.1.4.2 matt </ul> 347 1.1.1.1.4.2 matt 348 1.1.1.1.4.2 matt <p> If none of all this produces a usable result, send email to the 349 1.1.1.1.4.2 matt postfix-users (a] postfix.org mailing list and we'll try to help you 350 1.1.1.1.4.2 matt through this. </p> 351 1.1.1.1.4.2 matt 352 1.1.1.1.4.2 matt <h2><a name="credits">Credits</a></h2> 353 1.1.1.1.4.2 matt 354 1.1.1.1.4.2 matt <p> The following information is in part based on information that 355 1.1.1.1.4.2 matt was compiled by Dean Strik. </p> 356 1.1.1.1.4.2 matt 357 1.1.1.1.4.2 matt <ul> 358 1.1.1.1.4.2 matt 359 1.1.1.1.4.2 matt <li> <p> Mark Huizer wrote the original Postfix IPv6 patch. </p> 360 1.1.1.1.4.2 matt 361 1.1.1.1.4.2 matt <li> <p> Jun-ichiro 'itojun' Hagino of the KAME project made 362 1.1.1.1.4.2 matt substantial improvements. Since then, we speak of the KAME patch. 363 1.1.1.1.4.2 matt </p> 364 1.1.1.1.4.2 matt 365 1.1.1.1.4.2 matt <li> <p> The PLD Linux Distribution ported the code to other stacks 366 1.1.1.1.4.2 matt (notably USAGI). We speak of the PLD patch. A very important 367 1.1.1.1.4.2 matt feature of the PLD patch was that it can work with Lutz Jaenicke's 368 1.1.1.1.4.2 matt TLS patch for Postfix. </p> 369 1.1.1.1.4.2 matt 370 1.1.1.1.4.2 matt <li> <p> Dean Strik extended IPv6 support to platforms other than 371 1.1.1.1.4.2 matt KAME and USAGI, updated the patch to keep up with Postfix development, 372 1.1.1.1.4.2 matt and provided a combined IPv6 + TLS patch. Information about his 373 1.1.1.1.4.2 matt effort can be found on Dean Strik's Postfix website at 374 1.1.1.1.4.2 matt <a href="http://www.ipnet6.org/postfix/">http://www.ipnet6.org/postfix/</a>. </p> 375 1.1.1.1.4.2 matt 376 1.1.1.1.4.2 matt <li> <p> Wietse Venema took Dean Strik's IPv6 patch, merged it into 377 1.1.1.1.4.2 matt Postfix 2.2, and took the opportunity to eliminate all IPv4-specific 378 1.1.1.1.4.2 matt code from Postfix that could be removed. For systems without IPv6 379 1.1.1.1.4.2 matt support in the kernel and system libraries, Postfix has a simple 380 1.1.1.1.4.2 matt compatibility layer, so that it will use IPv4 as before. </p> 381 1.1.1.1.4.2 matt 382 1.1.1.1.4.2 matt </ul> 383 1.1.1.1.4.2 matt 384 1.1.1.1.4.2 matt </body> 385 1.1.1.1.4.2 matt 386 1.1.1.1.4.2 matt </html> 387
Indexes created Sun Jun 07 00:24:08 UTC 2026