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   6     <title>Petter Reinholdtsen: entries from August 2017</title>
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  14  <h1>
  15      <a href="http://people.skolelinux.org/pere/blog/">Petter Reinholdtsen</a>
  16
  17  </h1>
  18
  19 </div>
  20
  21
  22     <h3>Entries from August 2017.</h3>
  23
  24     <div class="entry">
  25       <div class="title">
  26         <a href="http://people.skolelinux.org/pere/blog/Simpler_recipe_on_how_to_make_a_simple__7_IMSI_Catcher_using_Debian.html">Simpler recipe on how to make a simple $7 IMSI Catcher using Debian</a>
  27       </div>
  28       <div class="date">
  29          9th August 2017
  30       </div>
  31       <div class="body">
  32         <p>On friday, I came across an interesting article in the Norwegian
  33 web based ICT news magazine digi.no on
  34 <a href="https://www.digi.no/artikler/sikkerhetsforsker-lagde-enkel-imsi-catcher-for-60-kroner-na-kan-mobiler-kartlegges-av-alle/398588">how
  35 to collect the IMSI numbers of nearby cell phones</a> using the cheap
  36 DVB-T software defined radios.  The article refered to instructions
  37 and <a href="https://www.youtube.com/watch?v=UjwgNd_as30">a recipe by
  38 Keld Norman on Youtube on how to make a simple $7 IMSI Catcher</a>, and I decided to test them out.</p>
  39
  40 <p>The instructions said to use Ubuntu, install pip using apt (to
  41 bypass apt), use pip to install pybombs (to bypass both apt and pip),
  42 and the ask pybombs to fetch and build everything you need from
  43 scratch.  I wanted to see if I could do the same on the most recent
  44 Debian packages, but this did not work because pybombs tried to build
  45 stuff that no longer build with the most recent openssl library or
  46 some other version skew problem.  While trying to get this recipe
  47 working, I learned that the apt->pip->pybombs route was a long detour,
  48 and the only piece of software dependency missing in Debian was the
  49 gr-gsm package.  I also found out that the lead upstream developer of
  50 gr-gsm (the name stand for GNU Radio GSM) project already had a set of
  51 Debian packages provided in an Ubuntu PPA repository.  All I needed to
  52 do was to dget the Debian source package and built it.</p>
  53
  54 <p>The IMSI collector is a python script listening for packages on the
  55 loopback network device and printing to the terminal some specific GSM
  56 packages with IMSI numbers in them.  The code is fairly short and easy
  57 to understand.  The reason this work is because gr-gsm include a tool
  58 to read GSM data from a software defined radio like a DVB-T USB stick
  59 and other software defined radios, decode them and inject them into a
  60 network device on your Linux machine (using the loopback device by
  61 default).  This proved to work just fine, and I've been testing the
  62 collector for a few days now.</p>
  63
  64 <p>The updated and simpler recipe is thus to</p>
  65
  66 <ol>
  67
  68 <li>start with a Debian machine running Stretch or newer,</li>
  69
  70 <li>build and install the gr-gsm package available from
  71 <a href="http://ppa.launchpad.net/ptrkrysik/gr-gsm/ubuntu/pool/main/g/gr-gsm/">http://ppa.launchpad.net/ptrkrysik/gr-gsm/ubuntu/pool/main/g/gr-gsm/</a>,</li>
  72
  73 <li>clone the git repostory from <a href="https://github.com/Oros42/IMSI-catcher">https://github.com/Oros42/IMSI-catcher</a>,</li>
  74
  75 <li>run grgsm_livemon and adjust the frequency until the terminal
  76 where it was started is filled with a stream of text (meaning you
  77 found a GSM station).</li>
  78
  79 <li>go into the IMSI-catcher directory and run 'sudo python simple_IMSI-catcher.py' to extract the IMSI numbers.</li>
  80
  81 </ol>
  82
  83 <p>To make it even easier in the future to get this sniffer up and
  84 running, I decided to package
  85 <a href="https://github.com/ptrkrysik/gr-gsm/">the gr-gsm project</a>
  86 for Debian (<a href="https://bugs.debian.org/871055">WNPP
  87 #871055</a>), and the package was uploaded into the NEW queue today.
  88 Luckily the gnuradio maintainer has promised to help me, as I do not
  89 know much about gnuradio stuff yet.</p>
  90
  91 <p>I doubt this "IMSI cacher" is anywhere near as powerfull as
  92 commercial tools like
  93 <a href="https://www.thespyphone.com/portable-imsi-imei-catcher/">The
  94 Spy Phone Portable IMSI / IMEI Catcher</a> or the
  95 <a href="https://en.wikipedia.org/wiki/Stingray_phone_tracker">Harris
  96 Stingray</a>, but I hope the existance of cheap alternatives can make
  97 more people realise how their whereabouts when carrying a cell phone
  98 is easily tracked.  Seeing the data flow on the screen, realizing that
  99 I live close to a police station and knowing that the police is also
 100 wearing cell phones, I wonder how hard it would be for criminals to
 101 track the position of the police officers to discover when there are
 102 police near by, or for foreign military forces to track the location
 103 of the Norwegian military forces, or for anyone to track the location
 104 of government officials...</p>
 105
 106 <p>It is worth noting that the data reported by the IMSI-catcher
 107 script mentioned above is only a fraction of the data broadcasted on
 108 the GSM network.  It will only collect one frequency at the time,
 109 while a typical phone will be using several frequencies, and not all
 110 phones will be using the frequencies tracked by the grgsm_livemod
 111 program.  Also, there is a lot of radio chatter being ignored by the
 112 simple_IMSI-catcher script, which would be collected by extending the
 113 parser code.  I wonder if gr-gsm can be set up to listen to more than
 114 one frequency?</p>
 115
 116       </div>
 117       <div class="tags">
 118
 119
 120         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern</a>, <a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance</a>.
 121
 122
 123       </div>
 124     </div>
 125     <div class="padding"></div>
 126
 127     <p style="text-align: right;"><a href="08.rss"><img src="http://people.skolelinux.org/pere/blog/xml.gif" alt="RSS Feed" width="36" height="14" /></a></p>
 128     <div id="sidebar">
 129
 130
 131
 132 <h2>Archive</h2>
 133 <ul>
 134
 135 <li>2019
 136 <ul>
 137
 138 <li><a href="http://people.skolelinux.org/pere/blog/archive/2019/01/">January (4)</a></li>
 139
 140 <li><a href="http://people.skolelinux.org/pere/blog/archive/2019/02/">February (3)</a></li>
 141
 142 <li><a href="http://people.skolelinux.org/pere/blog/archive/2019/03/">March (3)</a></li>
 143
 144 <li><a href="http://people.skolelinux.org/pere/blog/archive/2019/05/">May (2)</a></li>
 145
 146 <li><a href="http://people.skolelinux.org/pere/blog/archive/2019/06/">June (5)</a></li>
 147
 148 <li><a href="http://people.skolelinux.org/pere/blog/archive/2019/07/">July (2)</a></li>
 149
 150 <li><a href="http://people.skolelinux.org/pere/blog/archive/2019/08/">August (1)</a></li>
 151
 152 <li><a href="http://people.skolelinux.org/pere/blog/archive/2019/09/">September (1)</a></li>
 153
 154 <li><a href="http://people.skolelinux.org/pere/blog/archive/2019/11/">November (1)</a></li>
 155
 156 <li><a href="http://people.skolelinux.org/pere/blog/archive/2019/12/">December (3)</a></li>
 157
 158 </ul></li>
 159
 160 <li>2018
 161 <ul>
 162
 163 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/01/">January (1)</a></li>
 164
 165 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/02/">February (5)</a></li>
 166
 167 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/03/">March (5)</a></li>
 168
 169 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/04/">April (3)</a></li>
 170
 171 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/06/">June (2)</a></li>
 172
 173 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/07/">July (5)</a></li>
 174
 175 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/08/">August (3)</a></li>
 176
 177 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/09/">September (3)</a></li>
 178
 179 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/10/">October (5)</a></li>
 180
 181 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/11/">November (2)</a></li>
 182
 183 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/12/">December (4)</a></li>
 184
 185 </ul></li>
 186
 187 <li>2017
 188 <ul>
 189
 190 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/01/">January (4)</a></li>
 191
 192 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/02/">February (3)</a></li>
 193
 194 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/03/">March (5)</a></li>
 195
 196 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/04/">April (2)</a></li>
 197
 198 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/06/">June (5)</a></li>
 199
 200 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/07/">July (1)</a></li>
 201
 202 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/08/">August (1)</a></li>
 203
 204 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/09/">September (3)</a></li>
 205
 206 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/10/">October (5)</a></li>
 207
 208 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/11/">November (3)</a></li>
 209
 210 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/12/">December (4)</a></li>
 211
 212 </ul></li>
 213
 214 <li>2016
 215 <ul>
 216
 217 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/01/">January (3)</a></li>
 218
 219 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/02/">February (2)</a></li>
 220
 221 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/03/">March (3)</a></li>
 222
 223 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/04/">April (8)</a></li>
 224
 225 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/05/">May (8)</a></li>
 226
 227 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/06/">June (2)</a></li>
 228
 229 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/07/">July (2)</a></li>
 230
 231 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/08/">August (5)</a></li>
 232
 233 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/09/">September (2)</a></li>
 234
 235 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/10/">October (3)</a></li>
 236
 237 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/11/">November (8)</a></li>
 238
 239 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/12/">December (5)</a></li>
 240
 241 </ul></li>
 242
 243 <li>2015
 244 <ul>
 245
 246 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/01/">January (7)</a></li>
 247
 248 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/02/">February (6)</a></li>
 249
 250 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/03/">March (1)</a></li>
 251
 252 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/04/">April (4)</a></li>
 253
 254 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/05/">May (3)</a></li>
 255
 256 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/06/">June (4)</a></li>
 257
 258 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/07/">July (6)</a></li>
 259
 260 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/08/">August (2)</a></li>
 261
 262 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/09/">September (2)</a></li>
 263
 264 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/10/">October (9)</a></li>
 265
 266 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/11/">November (6)</a></li>
 267
 268 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/12/">December (3)</a></li>
 269
 270 </ul></li>
 271
 272 <li>2014
 273 <ul>
 274
 275 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/01/">January (2)</a></li>
 276
 277 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/02/">February (3)</a></li>
 278
 279 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/03/">March (8)</a></li>
 280
 281 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/04/">April (7)</a></li>
 282
 283 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/05/">May (1)</a></li>
 284
 285 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/06/">June (2)</a></li>
 286
 287 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/07/">July (2)</a></li>
 288
 289 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/08/">August (2)</a></li>
 290
 291 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/09/">September (5)</a></li>
 292
 293 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/10/">October (6)</a></li>
 294
 295 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/11/">November (3)</a></li>
 296
 297 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/12/">December (5)</a></li>
 298
 299 </ul></li>
 300
 301 <li>2013
 302 <ul>
 303
 304 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/01/">January (11)</a></li>
 305
 306 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/02/">February (9)</a></li>
 307
 308 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/03/">March (9)</a></li>
 309
 310 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/04/">April (6)</a></li>
 311
 312 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/05/">May (9)</a></li>
 313
 314 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/06/">June (10)</a></li>
 315
 316 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/07/">July (7)</a></li>
 317
 318 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/08/">August (3)</a></li>
 319
 320 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/09/">September (5)</a></li>
 321
 322 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/10/">October (7)</a></li>
 323
 324 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/11/">November (9)</a></li>
 325
 326 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/12/">December (3)</a></li>
 327
 328 </ul></li>
 329
 330 <li>2012
 331 <ul>
 332
 333 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
 334
 335 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
 336
 337 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
 338
 339 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
 340
 341 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
 342
 343 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
 344
 345 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
 346
 347 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/08/">August (6)</a></li>
 348
 349 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/09/">September (9)</a></li>
 350
 351 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/10/">October (17)</a></li>
 352
 353 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/11/">November (10)</a></li>
 354
 355 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/12/">December (7)</a></li>
 356
 357 </ul></li>
 358
 359 <li>2011
 360 <ul>
 361
 362 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
 363
 364 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
 365
 366 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
 367
 368 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
 369
 370 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
 371
 372 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
 373
 374 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
 375
 376 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
 377
 378 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
 379
 380 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
 381
 382 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
 383
 384 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
 385
 386 </ul></li>
 387
 388 <li>2010
 389 <ul>
 390
 391 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
 392
 393 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
 394
 395 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
 396
 397 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
 398
 399 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
 400
 401 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
 402
 403 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
 404
 405 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
 406
 407 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
 408
 409 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
 410
 411 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
 412
 413 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
 414
 415 </ul></li>
 416
 417 <li>2009
 418 <ul>
 419
 420 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
 421
 422 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
 423
 424 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
 425
 426 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
 427
 428 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
 429
 430 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
 431
 432 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
 433
 434 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
 435
 436 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
 437
 438 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
 439
 440 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
 441
 442 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
 443
 444 </ul></li>
 445
 446 <li>2008
 447 <ul>
 448
 449 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
 450
 451 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
 452
 453 </ul></li>
 454
 455 </ul>
 456
 457
 458
 459 <h2>Tags</h2>
 460 <ul>
 461
 462  <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (16)</a></li>
 463
 464  <li><a href="http://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
 465
 466  <li><a href="http://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
 467
 468  <li><a href="http://people.skolelinux.org/pere/blog/tags/bankid">bankid (4)</a></li>
 469
 470  <li><a href="http://people.skolelinux.org/pere/blog/tags/betalkontant">betalkontant (8)</a></li>
 471
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 474  <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (17)</a></li>
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 558  <li><a href="http://people.skolelinux.org/pere/blog/tags/ruter">ruter (7)</a></li>
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 563
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 565
 566  <li><a href="http://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (5)</a></li>
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 569
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 571
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 573
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 588  <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (42)</a></li>
 589
 590 </ul>
 591
 592
 593     </div>
 594     <p style="text-align: right">
 595  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.6</a>
 596 </p>
 597
 598   </body>
 599 </html>