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  24 <a href="https://github.com/gnumaniacs/netsniff-ng/"><img style="position: absolute; top: 0; right: 0; border: 0;" src="https://a248.e.akamai.net/assets.github.com/img/7afbc8b248c68eb468279e8c17986ad46549fb71/687474703a2f2f73332e616d617a6f6e6177732e636f6d2f6769746875622f726962626f6e732f666f726b6d655f72696768745f6461726b626c75655f3132313632312e706e67" alt="Fork me on GitHub"></a>
  25 <blockquote>
  26 <p>
  27 <table border="0">
  28 <tr>
  29 <td>
  30 <a href="http://netsniff-ng.org"><img src="http://netsniff-ng.org/img/logo.png" border="0" alt="netsniff-ng"></a>
  31 </td>
  32 <td>
  33 <br><br><br>
  34 <img src="http://netsniff-ng.org/img/logo2.png" border="0" alt="the packet sniffing beast">
  35 </td>
  36 </tr>
  37 </table>
  38 </blockquote>
  39
  40 <h2>Frequently asked questions (FAQ)</h2>
  41 <p>
  42 If your question is not answered here, please consult our mailing list.
  43 <h3>General questions</h3>
  44 <ul>
  45   <li><a href="#g0">What is netsniff-ng?</a></li>
  46   <li><a href="#g1">What are the main goals?</a></li>
  47   <li><a href="#g2">I like your project. Can I donate something?</a></li>
  48   <li><a href="#g3">How can I be notified of new releases?</a></li>
  49   <li><a href="#g4">Is there a mailing list?</a></li>
  50   <li><a href="#g5">Is there an IRC channel?</a></li>
  51   <li><a href="#g6">Do you have a blog? Is there a RSS feed for your blog?</a></li>
  52   <li><a href="#g7">Can you change the design of your blog?</a></li>
  53   <li><a href="#g8">Why can't I post comments to your blog?</a></li>
  54   <li><a href="#g9">Is there a commercial support?</a></li>
  55   <li><a href="#g10">How good is the throughput of RX_RING/TX_RING?</a></li>
  56   <li><a href="#g11">Are the statistics generated by ifpps 'reliable'?</a></li>
  57 </ul>
  58
  59 <h3>Usage questions</h3>
  60 <ul>
  61   <li><a href="#u0">What's a primer document and why should I read it first?</a></li>
  62   <li><a href="#u1">What platforms are supported?</a></li>
  63   <li><a href="#u2">What libraries are required?</a></li>
  64   <li><a href="#u3">What version of netsniff-ng should I use?</a></li>
  65   <li><a href="#u4">Can netsniff-ng read network dumps of Wireshark or others and vice versa?</a></li>
  66   <li><a href="#u5">How can I create Berkeley Packet Filters?</a></li>
  67   <li><a href="#u6">I've created a custom Berkeley Packet Filter program with tcpdump, but netsniff-ng cuts the packet payload?</a></li>
  68   <li><a href="#u7">How do I sniff in a switched environment?</a></li>
  69   <li><a href="#u8">Can I run netsniff-ng as a normal user?</a></li>
  70 </ul>
  71
  72 <h3>Licensing questions</h3>
  73 <ul>
  74   <li><a href="#l0">What's the license of netsniff-ng?</a></li>
  75   <li><a href="#l1">Can you change your license e.g. to BSD or have you ever considered it?</a></li>
  76   <li><a href="#l2">Can I use netsniff-ng commercially?</a></li>
  77   <li><a href="#l3">Can I use netsniff-ng as a part of my commercial product?</a></li>
  78   <li><a href="#l4">How much does netsniff-ng cost?</a></li>
  79   <li><a href="#l5">Really, then why are you doing this?</a></li>
  80 </ul>
  81
  82 <h3>Development questions</h3>
  83 <ul>
  84   <li><a href="#d0">Do you have release cycles?</a></li>
  85   <li><a href="#d1">Can you add feature xy to netsniff-ng?</a></li>
  86   <li><a href="#d2">Are there other source repositories than on your homepage?</a></li>
  87   <li><a href="#d3">Is your GoogleCode page still up to date?</a></li>
  88   <li><a href="#d4">Can I participate in the development of netsniff-ng?</a></li>
  89   <li><a href="#d5">How do I post a patch?</a></li>
  90   <li><a href="#d6">How do I use Git?</a></li>
  91   <li><a href="#d8">Will you ship a GUI like Wireshark?</a></li>
  92   <li><a href="#d9">Will you support the future pcapng (so called 'PCAP Next Generation Dump File Format') format?</a></li>
  93   <li><a href="#d10">Do you plan some fancy version other than kernelspace RX_RING/TX_RING?</a></li>
  94   <li><a href="#d11">Will you support the PF_RING from the ntop project?</a></li>
  95   <li><a href="#d13">Are you also maintaining distribution specific packages?</a></li>
  96   <li><a href="#d14">Will you port netsniff-ng to Windows?</a></li>
  97   <li><a href="#d15">Will you port netsniff-ng to *BSD?</a></li>
  98   <li><a href="#d16">Do you have your own devel trees? Which one should I patch against?</a></li>
  99 </ul>
 100
 101 <h3>Misc questions</h3>
 102 <ul>
 103   <li><a href="#m0">Why don't you answer my mails? Isn't that rude?</a></li>
 104   <li><a href="#m1">How do you pronounce netsniff-ng?</a></li>
 105   <li><a href="#m2">Do you have netsniff-ng t-shirts?</a></li>
 106   <li><a href="#m3">I've got some artwork for you!?</a></li>
 107 </ul>
 108
 109 <p>
 110 <hr>
 111
 112 <div>
 113 <h3><a name="g0">What is netsniff-ng?</a></h3>
 114 <blockquote>
 115 <p>
 116 netsniff-ng is a high performance Linux network sniffer for packet inspection. The project started during my B. Sc. thesis at the Max Planck Institute and continued to grow into a useful toolkit ever since. At the time of its initial development, the famous libpcap library did not support the zero-copy extensions of the Linux kernel. Therefore, I closed this gap by developing a sniffer that had a significantly better performance than existing ones that used libpcap.
 117 </blockquote>
 118 </div>
 119
 120 <div>
 121 <h3><a name="g1">What are the main goals?</a></h3>
 122 <blockquote>
 123 <p>
 124 netsniff-ngs main goal is to be a <i>high performance</i> network sniffer that focuses on <i>usability</i>, <i>robustness</i> and <i>functionality</i>. Its aim is to support the daily work for networking engineers, developers, admins or Linux users by providing support with or in network monitoring, protocol analysis, reverse engineering, network debugging and penetration testing. Also, since 0.5.6.0 we've added further tools for high-performance traffic generation and reliable top-like networking statistics.
 125 </blockquote>
 126 </div>
 127
 128 <div>
 129 <h3><a name="g2">I like your project. Can I donate something?</a></h3>
 130 <blockquote>
 131 <p>
 132 Sure, we're always happy to hear that. If you think this software is good, then please consider <a href="http://flattr.com/thing/421382/gnumaniacs-devs" target="_blank">donating</a> (Flattr) some money for our development. For non-money stuff, we'd prefer hardware like servers, switches, routers, access points, specific NICs or wireless cards or other (also exotic) kinds of embedded systems in order to do research, test our software and integrate new features. You are welcome to leave us a short message at <script type="text/javascript">InsertMail("daniel", "netsniff-ng", "org");</script>.
 133 </blockquote>
 134 </div>
 135
 136 <div>
 137 <h3><a name="g3">How can I be notified of new releases?</a></h3>
 138 <blockquote>
 139 <p>
 140 New releases will be announced on our homepage, mailing list and Freshmeat. We have a project page <a href="http://freshmeat.net/projects/netsniff-ng/">at Freshmeat</a> where you can subscribe.
 141 </blockquote>
 142 </div>
 143
 144 <div>
 145 <h3><a name="g4">Is there a mailing list?</a></h3>
 146 <blockquote>
 147 <p>
 148 Yes, of course there is. It's a moderated, spam-free mailing list on GoogleGroups where you can add yourself and post your questions to <script type="text/javascript">InsertMail("netsniff-ng", "googlegroups", "com");</script>.
 149 </blockquote>
 150 </div>
 151
 152 <div>
 153 <h3><a name="g5">Is there an IRC channel?</a></h3>
 154 <blockquote>
 155 <p>
 156 Sometimes we're reachable via <a href="irc://irc.freenode.net/netsniff-ng">#netsniff-ng</a> which is located at <a href="http://freenode.net/irc_servers.shtml">Freenode</a>.
 157 </blockquote>
 158 </div>
 159
 160 <div>
 161 <h3><a name="g6">Do you have a blog? Is there a RSS feed for your blog?</a></h3>
 162 <blockquote>
 163 <p>
 164 Yes, it's <a href="http://dev.netsniff-ng.org/">http://dev.netsniff-ng.org/</a>. The RSS feed can be found here: <a href="http://blog.cryptoism.org/t_netsniff-ng.xml">http://blog.cryptoism.org/t_netsniff-ng.xml</a>
 165 </blockquote>
 166 </div>
 167
 168 <div>
 169 <h3><a name="g7">Can you change the design of your blog?</a></h3>
 170 <blockquote>
 171 <p>
 172 No, sorry. ;-)
 173 </blockquote>
 174 </div>
 175
 176 <div>
 177 <h3><a name="g8">Why can't I post comments to your blog?</a></h3>
 178 <blockquote>
 179 <p>
 180 Because we like HTML too much. ;-) Moderating all those comments costs too much time that we could also spend on development. If you'd like to discuss certain issues, then please use our mailing list.
 181 </blockquote>
 182 </div>
 183
 184 <div>
 185 <h3><a name="g9">Is there a commercial support?</a></h3>
 186 <blockquote>
 187 <p>
 188 No.
 189 </blockquote>
 190 </div>
 191
 192 <div>
 193 <h3><a name="g10">How good is the throughput of RX_RING/TX_RING?</a></h3>
 194 <blockquote>
 195 <p>
 196 Have a look at our <a href="http://wiki.netsniff-ng.org">Wiki</a> within the benchmark section. For instance, on commodity hardware with Gigabit-Ethernet, we've reached nearly wirespeed with <i>trafgen</i> (64 Byte, 1.2 Mio pps).
 197 </blockquote>
 198 </div>
 199
 200 <div>
 201 <h3><a name="g11">Are the statistics generated by ifpps 'reliable'?</a></h3>
 202 <blockquote>
 203 <p>
 204 Yes. The statistics are extracted from the kernel directly, so this is what the NICs device driver gets to see. There is <i>no</i> sniffing or the like involved to generate these figures.
 205 </blockquote>
 206 </div>
 207
 208 <div>
 209 <h3><a name="u0">What's a primer document and why should I read it first?</a></h3>
 210 <blockquote>
 211 <p>
 212 It's netsniff-ngs manpage. The manpage is shipped with the latest stable netsniff-ng release. Everything that needs to be known for using netsniff-ng is documented within this manpage.
 213 </blockquote>
 214 </div>
 215
 216 <div>
 217 <h3><a name="u1">What platforms are supported?</a></h3>
 218 <blockquote>
 219 <p>
 220 Currently only operating systems running on Linux kernels with <i>CONFIG_PACKET_MMAP</i> enabled. This feature can be found even back to the days of 2.4 kernels. Most operating systems ship pre-compiled kernels that have this config option enabled and even the latest kernel versions got rid of this option and have this functionality built-in. However, we recommend using a kernel >= 2.6.31, because the TX_RING support has been added since then.
 221 </blockquote>
 222 </div>
 223
 224 <div>
 225 <h3><a name="u2">What libraries are required?</a></h3>
 226 <blockquote>
 227 <p>
 228 Well, for version 0.5.5.0 <i>libc</i> is the only one. Most operating systems already have their <i>libc</i> shipped. That's it, nothing else. For version 0.5.6.0 you'll need <i>libncurses</i>, <i>zlib</i>, <i>libgcrypt</i>. All of them are usually available via your operating systems packet management system.
 229 </blockquote>
 230 </div>
 231
 232 <div>
 233 <h3><a name="u3">What version of netsniff-ng should I use?</a></h3>
 234 <blockquote>
 235 <p>
 236 That depends. If you prefer to use the latest features, use the version that is marked as <i>-next</i> on the frontpage. The source is available via tarball and Git. Note that <i>-next</i> is our development tree and nearly daily changes are made. Otherwise there is a stable version that is usually recommended.
 237 </blockquote>
 238 </div>
 239
 240 <div>
 241 <h3><a name="u4">Can netsniff-ng read network dumps of Wireshark or others and vice versa?</a></h3>
 242 <blockquote>
 243 <p>
 244 Yes, if the dumps are formatted as <i>pcap</i> files. This is default on Wireshark for instance. On the other hand, Wireshark can also read netsniff-ng dumps.
 245 </blockquote>
 246 </div>
 247
 248 <div>
 249 <h3><a name="u5">How can I create Berkeley Packet Filters?</a></h3>
 250 <blockquote>
 251 <p>
 252 If you want to run netsniff-ng in combination with <i>-f</i> or <i>--filter &lt;file&gt;</i> you need to build a so called Berkeley Packet Filter program within a plaintext file (here, marked as: <i>&lt;file&gt;</i>). The Berkeley Packet Filters language description can be obtained from netsniff-ngs documentation <a href="bpf.pdf">section</a>. One way to create a custom filter for the non-lazy people is to hack the opcodes by hand according to the specification. In this case you have all the freedom to build your filters for your needs. The alternative way is to use tcpdumps <i>-dd</i> option. Simply pipe the output into a textfile and pass this to netsniff-ng.
 253 <p>
 254 Furthermore, we already ship some common filters and we are planning our own filter compiler! Most distributions put these files into <i>/etc/netsniff-ng/rules/</i>.
 255 </blockquote>
 256 </div>
 257
 258 <div>
 259 <h3><a name="u6">I've created a custom Berkeley Packet Filter program with tcpdump, but netsniff-ng cuts the packet payload?</a></h3>
 260 <blockquote>
 261 <p>
 262 If you try to create custom socket filters with tcpdump <i>-dd</i>, you have to edit the <i>ret</i> opcode (<i>0x6</i>) of the resulting filter, otherwise your payload will be cut off:
 263 <p>
 264 <i>0x6, 0, 0, 0xFFFFFFFF</i> instead of <i>0x6, 0, 0, 0x00000060</i>
 265 <p>
 266 The Linux kernel now takes <i>skb-&gt;len</i> instead of 0xFFFFFFFF. If you do not change it, the kernel will take 0x00000060 as buffer length and packets larger than 96 Byte will be cut off (filled with zero Bytes)! It's a bug in libpcaps filter compiler. Detailed information about this issue can be found on our <a href="http://dev.netsniff-ng.org/#4">blog post</a>.
 267 </blockquote>
 268 </div>
 269
 270 <div>
 271 <h3><a name="u7">How do I sniff in a switched environment?</a></h3>
 272 <blockquote>
 273 <p>
 274 I rudely refer to the <i>dSniff</i> documentation that says:
 275 <p>
 276 The easiest route is simply to impersonate the local gateway, stealing client traffic en route to some remote destination. Of course, the traffic must be forwarded by your attacking machine, either by enabling kernel IP forwarding or with a userland program that acccomplishes the same (fragrouter -B1).
 277 <p>
 278 Several people have reportedly destroyed connectivity on their LAN to the outside world by arpspoof'ing the gateway, and forgetting to enable IP forwarding on the attacking machine. Don't do this. You have been warned.
 279 </blockquote>
 280 </div>
 281
 282 <div>
 283 <h3><a name="u8">Can I run netsniff-ng as a normal user?</a></h3>
 284 <blockquote>
 285 <p>
 286 No, you need to be <i>root</i> on your box in oder to run netsniff-ng.
 287 </blockquote>
 288 </div>
 289
 290 <div>
 291 <h3><a name="l0">What's the license of netsniff-ng?</a></h3>
 292 <blockquote>
 293 <p>
 294 It's the GNU GPL, version 2. <a href="http://www.gnu.org/licenses/gpl-2.0.txt">Here</a>'s the licensing text.
 295 </blockquote>
 296 </div>
 297
 298 <div>
 299 <h3><a name="l1">Can you change your license e.g. to BSD or have you ever considered it?</a></h3>
 300 <blockquote>
 301 <p>
 302 No. We've thought this through and the GPL version 2 is the best that suits our needs.
 303 </blockquote>
 304 </div>
 305
 306 <div>
 307 <h3><a name="l2">Can I use netsniff-ng commercially?</a></h3>
 308 <blockquote>
 309 <p>
 310 Yes, if you mean "I work for a commercial organization and I'd like to use netsniff-ng for capturing and analyzing network traffic in our company's networks or in our customer's networks.".
 311 <p>
 312 It depends, if you mean "Can I use netsniff-ng as a part of my commercial product?". See below.
 313 </blockquote>
 314 </div>
 315
 316 <div>
 317 <h3><a name="l3">Can I use netsniff-ng as a part of my commercial product?</a></h3>
 318 <blockquote>
 319 <p>
 320 As long as your commercial product then stays compatible with the <a href="http://www.gnu.org/licenses/gpl-2.0.txt">GNU GPL, version 2</a>, then it should be no problem. Have a look at the <a href="http://www.gnu.org/licenses/old-licenses/gpl-2.0-faq.html">frequently asked questions</a> of gnu.org in order to clarify your questions.
 321 </blockquote>
 322 </div>
 323
 324 <div>
 325 <h3><a name="l4">How much does netsniff-ng cost?</a></h3>
 326 <blockquote>
 327 <p>
 328 netsniff-ng is "free software"; you can download it without paying any license fee. The version of netsniff-ng you download isn't a "demo" version, with limitations not present in a "full" version; it is the full version. And the good thing is: it will always stay that way!
 329 <p>
 330 netsniff-ng is licensed under the GNU GPL, version 2. Read more about this <a href="http://www.gnu.org/licenses/gpl-2.0.txt">here</a>.
 331 </blockquote>
 332 </div>
 333
 334 <div>
 335 <h3><a name="l5">Really, then why are you doing this?</a></h3>
 336 <blockquote>
 337 <p>
 338 For the fun and freedom of contributing to the open source community and for learning and researching purposes. Simple, isn't it?
 339 </blockquote>
 340 </div>
 341
 342 <div>
 343 <h3><a name="d0">Do you have release cycles?</a></h3>
 344 <blockquote>
 345 <p>
 346 No, we don't. We used to, but since netsniff-ng is a spare time project and sometimes there's lots of other stuff to do and sometimes not, we think we are more flexible this way without making hard deadline promises. Nevertheless, netsniff-ng is a long-term project, so even if there's hard times for weeks of not pushing to Git, there will be others with the opposite situation. We think netsniff-ng is useful for our daily network engineering work and research and we will do our best that it stays this way! This should be your take-home message! ;-)
 347 </blockquote>
 348 </div>
 349
 350 <div>
 351 <h3><a name="d1">Can you add feature xy to netsniff-ng?</a></h3>
 352 <blockquote>
 353 <p>
 354 Well, that depends. If it's a good feature and you make us think that adding this would make sense, then why not. You are also free to discuss this specific feature with us and post a patch.
 355 </blockquote>
 356 </div>
 357
 358 <div>
 359 <h3><a name="d2">Are there other source repositories than on your homepage?</a></h3>
 360 <blockquote>
 361 <p>
 362 No! Only the repositories stated on our homepage are <a href="http://repo.or.cz/w/netsniff-ng.git/">official</a> ones!
 363 </blockquote>
 364 </div>
 365
 366 <div>
 367 <h3><a name="d3">Is your GoogleCode page still up to date?</a></h3>
 368 <blockquote>
 369 <p>
 370 No, it isn't. We completely moved to <i>repo.or.cz</i> and do <i>not</i> use any of the functionality from GoogleCode. Please consider our repo.or.cz page <a href="http://repo.or.cz/w/netsniff-ng.git">http://repo.or.cz/w/netsniff-ng.git</a> as our official repository.
 371 </blockquote>
 372 </div>
 373
 374 <div>
 375 <h3><a name="d4">Can I participate in the development of netsniff-ng?</a></h3>
 376 <blockquote>
 377 <p>
 378 Sure, we'd be happy about that. Send us your ideas or code and we're going to evaluate and probably integrate it. Have a look at the HACKING file. The release Git repository is located at <a href="http://repo.or.cz/w/netsniff-ng.git">http://repo.or.cz/w/netsniff-ng.git</a>, so you are free to clone and hack.
 379 </blockquote>
 380 </div>
 381
 382 <div>
 383 <h3><a name="d5">How do I post a patch?</a></h3>
 384 <blockquote>
 385 <p>
 386 Have a look at the HACKING file of netsniff-ngs source for further instructions.
 387 </blockquote>
 388 </div>
 389
 390 <div>
 391 <h3><a name="d6">How do I use Git?</a></h3>
 392 <blockquote>
 393 <p>
 394 Have a look at the Git documentation at <a href="http://www.kernel.org/pub/software/scm/git/docs/">http://www.kernel.org/pub/software/scm/git/docs/</a>.
 395 </blockquote>
 396 </div>
 397
 398 <div>
 399 <h3><a name="d8">Will you ship a GUI like Wireshark?</a></h3>
 400 <blockquote>
 401 <p>
 402 Probably not, at least this is not our main interest. netsniff-ng is intened to run on any Linux boxes including the ones without graphical user interfaces, so that you are able to run netsniff-ng on your server or router. But of course, you are free to develop a GUI and let us know about it! :-)
 403 </blockquote>
 404 </div>
 405
 406 <div>
 407 <h3><a name="d9">Will you support the future pcapng (so called 'PCAP Next Generation Dump File Format') format?</a></h3>
 408 <blockquote>
 409 <p>
 410 Yes, we're planning it.
 411 </blockquote>
 412 </div>
 413
 414 <div>
 415 <h3><a name="d10">Do you plan some fancy version other than kernelspace RX_RING/TX_RING?</a></h3>
 416 <blockquote>
 417 <p>
 418 We're experimenting on our own kernelspace zero-copy mechanism and also enhancements of the PACKET_MMAP. Nevertheless, the official netsniff-ng version will have the kernel-supported packet mmap, as is. If our findings really outperform the RX_RING/TX_RING and are worth publishing, then it will be shipped as a patch and contribute it to netdev.
 419 </blockquote>
 420 </div>
 421
 422 <div>
 423 <h3><a name="d11">Will you support the PF_RING from the ntop project?</a></h3>
 424 <blockquote>
 425 <p>
 426 Well, no. There are two reasons for this: <i>First reason</i> is, that it's not part of the mainline kernel. A interesting discussion about getting PF_RING into the kernel can be found at the netdev lists (<a href="http://lists.openwall.net/netdev/2009/10/14/37">http://lists.openwall.net/netdev/2009/10/14/37</a>) and obviously there are no further efforts (browse the netdev/LKML, also <a href="http://www.spinics.net/lists/netfilter-devel/msg20212.html">netfilter</a>) from the ntop project to merge both architectures or add features to PF_PACKET. <i>Second reason</i> is that we've evaluated the PF_RING (without the commercial Direct NIC Access [DNA]) regarding its performance and came to the conclusion, that there is no significant performance enhancement on our IBM HS21 Bladeserver test system. ntopi's DNA ships its own versions of some modified device drivers like Broadcoms tg3 and NetXtreme, Intels e1000(e), igb and ixgbe. Since these modifications are not official, neither to the kernel, nor to the vendors and cover only a small amout of what is out there, we're not doing further investigations at the moment. Also, netsniff-ng users have reported similar observations. A benchmark with PF_RING in transparent_mode 0 and 1 is even slower than netsniff-ng and in transparent_mode 2 both have the same performance. The test was done on a Dell PowerEdge 2850. Nevertheless, <a href="http://www.ntop.org/">ntop</a> is a very interesting project you definately should check out!
 427 </blockquote>
 428 </div>
 429
 430 <div>
 431 <h3><a name="d13">Are you also maintaining distribution specific packages?</a></h3>
 432 <blockquote>
 433 <p>
 434 Yes, but only for <a href="http://packages.qa.debian.org/n/netsniff-ng.html">Debian GNU/Linux</a>, which then automatically gets updated in some other distros like <a href="http://grml.org">GRML</a>. People that maintain netsniff-ng in other distributions are listed within the CREDITS file.
 435 </blockquote>
 436 </div>
 437
 438 <div>
 439 <h3><a name="d14">Will you port netsniff-ng to Windows?</a></h3>
 440 <blockquote>
 441 <p>
 442 No, at least <i>we</i> are not doing this simply because we don't have any Windows box! Why would we? Why would we encourage people to stay at a fucked up operating system? Have a look at the FSF site for more information, if you don't know why you should switch to Linux or *BSD.
 443 </blockquote>
 444 </div>
 445
 446 <div>
 447 <h3><a name="d15">Will you port netsniff-ng to *BSD?</a></h3>
 448 <blockquote>
 449 <p>
 450 Could be possible for the future.
 451 </blockquote>
 452 </div>
 453
 454 <div>
 455 <h3><a name="d16">Do you have your own personal devel trees? Which one should I patch against?</a></h3>
 456 <blockquote>
 457 <p>
 458 Yes, we have. Emmanuels devel tree is at <a href="http://github.com/eroullit/netsniff-ng/">http://github.com/eroullit/netsniff-ng/</a> and Daniels devel tree can be found at <a href="http://repo.or.cz/w/netsniff-ng.git">http://repo.or.cz/w/netsniff-ng.git</a>. Unlike otherwise clarified, you normally patch against the tree stated on our website, which is <a href="http://repo.or.cz/w/netsniff-ng.git">http://repo.or.cz/w/netsniff-ng.git</a>.
 459 </blockquote>
 460 </div>
 461
 462 <div>
 463 <h3><a name="m0">Why don't you answer my mails? Isn't that rude?</a></h3>
 464 <blockquote>
 465 <p>
 466 No, it isn't rude. We're focusing on answering every mail, but in some rare cases it's mostly because of sheer lack of time to answer each email that gets sent to us. Furthermore, some hints for writing good e-mails can be found in <a href="http://www.ietf.org/rfc/rfc2635.txt">rfc2635</a> and <a href="http://www.ietf.org/rfc/rfc1855.txt">rfc1855</a>.
 467 </blockquote>
 468 </div>
 469
 470 <div>
 471 <h3><a name="m1">How do you pronounce netsniff-ng?</a></h3>
 472 <blockquote>
 473 <p>
 474 <code>$ flite -o play -t "netsniff n g"</code>
 475 </blockquote>
 476 </div>
 477
 478 <div>
 479 <h3><a name="m2">Do you have netsniff-ng t-shirts, ...?</a></h3>
 480 <blockquote>
 481 <p>
 482 Yes, <a href="http://netsniff-ng.spreadshirt.de/">here</a> (note: we do not take any commission for the products).
 483 </blockquote>
 484 </div>
 485
 486 <div>
 487 <h3><a name="m3">I've got some artwork for you!?</a></h3>
 488 <blockquote>
 489 <p>
 490 Great! We'd very much like to see it. Please mail it to us ;-)
 491 </blockquote>
 492 </div>
 493
 494 <p>
 495 <a href="http://www.debian.org/"><img src="http://netsniff-ng.org/img/debian.png" border="0" alt="powered by Debian"></a>&nbsp;
 496 <a href="http://www.vim.org/"><img src="http://netsniff-ng.org/img/vim.png" border="0" alt="powered by vim"></a>&nbsp;
 497 <a href="http://www.anybrowser.org/campaign/"><img src="http://netsniff-ng.org/img/vt100.gif" border="0" alt="best viewed with vt100"></a>&nbsp;
 498 <a href="http://eupat.ffii.org/"><img src="http://netsniff-ng.org/img/no_epatent.png" border="0" alt="no epatents"></a>&nbsp;
 499 <a href="http://www.laquadrature.net/"><img src="http://netsniff-ng.org/img/qdn.png" border="0" alt="qdn"></a>
 500
 501 <table border="0" width="90%">
 502 <tr>
 503   <td>
 504     <code>Copyright (C) 2009-2012 <a href="http://gnumaniacs.org">Daniel Borkmann</a>
 505     <script type="text/javascript">InsertMail("daniel", "netsniff-ng", "org");</script>
 506     and
 507     <a href="http://emmanuel.netsniff-ng.org">Emmanuel Roullit</a>
 508     <script type="text/javascript">InsertMail("emmanuel", "netsniff-ng", "org");</script>
 509     </code><br>
 510   </td>
 511 </tr>
 512 </table>
 513
 514 </body>
 515 </html>
 516