20231102/routing-01.txt

-cassini/home/peter/bo/2023ws/dbs/20231102> /sbin/route -n
-Kernel-IP-Routentabelle
-Ziel            Router          Genmask         Flags Metric Ref    Use Iface
-0.0.0.0         10.128.29.1     0.0.0.0         UG    0      0        0 wlan0
-10.128.29.0     0.0.0.0         255.255.255.0   U     0      0        0 wlan0
-cassini/home/peter/bo/2023ws/dbs/20231102> /sbin/ifconfig
-lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
-        inet 127.0.0.1  netmask 255.0.0.0
-        inet6 ::1  prefixlen 128  scopeid 0x10<host>
-        loop  txqueuelen 1000  (Lokale Schleife)
-        RX packets 2141231  bytes 2409535237 (2.2 GiB)
-        RX errors 0  dropped 0  overruns 0  frame 0
-        TX packets 2141231  bytes 2409535237 (2.2 GiB)
-        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
-
-wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
-        inet 10.128.29.120  netmask 255.255.255.0  broadcast 10.128.29.255
-        inet6 fe80::c685:8ff:fe4a:5042  prefixlen 64  scopeid 0x20<link>
-        ether c4:85:08:4a:50:42  txqueuelen 1000  (Ethernet)
-        RX packets 2051475  bytes 905394925 (863.4 MiB)
-        RX errors 0  dropped 0  overruns 0  frame 0
-        TX packets 4252967  bytes 2323112955 (2.1 GiB)
-        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
-
-cassini/home/peter/bo/2023ws/dbs/20231102>

20231102/routing-02.txt

-cassini/home/peter/bo/2023ws/dbs/20231102> ip route
-default via 10.128.29.1 dev wlan0
-10.128.29.0/24 dev wlan0 proto kernel scope link src 10.128.29.120
-cassini/home/peter/bo/2023ws/dbs/20231102> /sbin/route -n
-Kernel-IP-Routentabelle
-Ziel            Router          Genmask         Flags Metric Ref    Use Iface
-0.0.0.0         10.128.29.1     0.0.0.0         UG    0      0        0 wlan0
-10.128.29.0     0.0.0.0         255.255.255.0   U     0      0        0 wlan0
-cassini/home/peter/bo/2023ws/dbs/20231102>

20231102/routing-03.txt

-cassini/home/peter/bo/2023ws/dbs/20231102> /sbin/route -n
-Kernel-IP-Routentabelle
-Ziel            Router          Genmask         Flags Metric Ref    Use Iface
-0.0.0.0         10.128.29.1     0.0.0.0         UG    0      0        0 wlan0
-10.128.29.0     0.0.0.0         255.255.255.0   U     0      0        0 wlan0
-cassini/home/peter/bo/2023ws/dbs/20231102> traceroute -n 88.198.170.60
-traceroute to 88.198.170.60 (88.198.170.60), 30 hops max, 60 byte packets
- 1  10.128.29.1  2.345 ms  2.854 ms  2.848 ms
- 2  * * *
- 3  188.1.231.93  4.512 ms  4.727 ms  5.389 ms
- 4  188.1.144.178  10.100 ms  10.073 ms  10.072 ms
- 5  188.1.242.10  9.438 ms  9.111 ms  11.022 ms
- 6  213.239.224.69  15.161 ms  13.278 ms 213.239.224.85  12.722 ms
- 7  213.239.229.62  12.697 ms  13.011 ms 213.239.229.58  12.491 ms
- 8  144.76.104.6  12.759 ms  12.650 ms  16.253 ms
- 9  144.76.104.6  15.634 ms  12.525 ms  12.840 ms
-cassini/home/peter/bo/2023ws/dbs/20231102> traceroute 88.198.170.60
-traceroute to 88.198.170.60 (88.198.170.60), 30 hops max, 60 byte packets
- 1  _gateway (10.128.29.1)  2.266 ms  2.802 ms  2.782 ms
- 2  * * *
- 3  cr-dui1-pwether10722.x-win.dfn.de (188.1.231.93)  5.425 ms  4.740 ms  5.416 ms
- 4  cr-fra2-be16.x-win.dfn.de (188.1.144.178)  9.844 ms  9.828 ms  8.831 ms
- 5  kr-fra307.x-win.dfn.de (188.1.242.10)  9.796 ms  9.782 ms  9.765 ms
- 6  core23.fsn1.hetzner.com (213.239.224.69)  13.576 ms core22.fsn1.hetzner.com (213.239.224.13)  12.551 ms core21.fsn1.hetzner.com (213.239.224.101)  12.231 ms
- 7  ex9k2.dc10.fsn1.hetzner.com (213.239.229.58)  12.722 ms static.213-239-254-86.clients.your-server.de (213.239.254.86)  16.846 ms ex9k2.dc10.fsn1.hetzner.com (213.239.229.62)  17.091 ms
- 8  static.6.104.76.144.clients.your-server.de (144.76.104.6)  17.633 ms  14.226 ms  13.191 ms
- 9  static.6.104.76.144.clients.your-server.de (144.76.104.6)  13.144 ms *  15.826 ms
-cassini/home/peter/bo/2023ws/dbs/20231102>

20231102/services-01.txt

-cassini/home/peter/bo/2023ws/dbs/20231102> cat hello-01
-#!/bin/bash
-
-echo "Hello, world!"
-cassini/home/peter/bo/2023ws/dbs/20231102> chmod +x hello-01
-cassini/home/peter/bo/2023ws/dbs/20231102> ./hello-01
-Hello, world!
-cassini/home/peter/bo/2023ws/dbs/20231102> nc -p 1234 -l -c ./hello-01
-cassini/home/peter/bo/2023ws/dbs/20231102>
-
-8< ---------------------------------------------------------------------
-
-cassini/home/peter> nc 127.0.0.1 1234
-Hello, world!

20231102/services-02.txt

-cassini/home/peter/bo/2023ws/dbs/20231102> cat hello-02
-#!/bin/bash
-
-echo -n "Name: "
-read name
-echo "Hallo, $name!"
-cassini/home/peter/bo/2023ws/dbs/20231102> ./hello-02
-Name: Peter
-Hallo, Peter!
-cassini/home/peter/bo/2023ws/dbs/20231102> nc -p 1234 -l -c ./hello-02
-cassini/home/peter/bo/2023ws/dbs/20231102>
-
-8< ---------------------------------------------------------------------
-
-cassini/home/peter> nc 127.0.0.1 1234
-Name: Peter
-Hallo, Peter!
-cassini/home/peter>

20231102/smtp-01.txt

-cassini/home/peter/bo/2023ws/dbs/20231102> nc 88.198.170.60 25
-220 mx1.gerwinski.de ESMTP Exim 4.94.2 Thu, 02 Nov 2023 11:24:26 +0100
-Hallo?
-500 unrecognized command
-HELO cassini
-250 mx1.gerwinski.de Hello cassini [195.37.15.82]
-MAIL FROM: <peter.gerwinski@hs-bochum.de>
-250 OK
-RCPT TO: <peter@gerwinski.de>
-250 Accepted
-DATA
-354 Enter message, ending with "." on a line by itself
-From: Prof. Dr. rer. nat. Peter Gerwinski <peter.gerwinski@hs-bochum.de>
-To: Peter Gerwinski <peter@gerwinski.de>
-Subject: Test
-
-Hallo,
-
-dies ist ein Test.
-
-Schöne Grüße!
-.
-250 OK id=1qyUuM-00GWUO-5J
-QUIT
-221 mx1.gerwinski.de closing connection
-cassini/home/peter/bo/2023ws/dbs/20231102>

20231102/smtp-02.txt

-cassini/home/peter/bo/2023ws/dbs/20231102> nc 88.198.170.60 25
-220 mx1.gerwinski.de ESMTP Exim 4.94.2 Thu, 02 Nov 2023 11:36:40 +0100
-HELO cassini
-250 mx1.gerwinski.de Hello cassini [195.37.15.82]
-MAIL FROM: <peter.gerwinski@hs-bochum.de>
-250 OK
-RCPT TO: <peter@gerwinski.de>
-250 Accepted
-DATA
-354 Enter message, ending with "." on a line by itself
-Content-Length: 5
-Subject: Punkt-Test
-
-vor dem Punkt
-.
-nach dem250 OK id=1qyV4V-00GXJw-Ld
- Punkt
-500 unrecognized command
-Schade.
-500 unrecognized command
-QUIT
-221 mx1.gerwinski.de closing connection
-cassini/home/peter/bo/2023ws/dbs/20231102>

20231102/smtp-03.txt

-cassini/home/peter/bo/2023ws/dbs/20231102> nc 88.198.170.60 25
-220 mx1.gerwinski.de ESMTP Exim 4.94.2 Thu, 02 Nov 2023 11:38:20 +0100
-HELO cassini
-250 mx1.gerwinski.de Hello cassini [195.37.15.82]
-MAIL FROM: <peter.gerwinski@hs-bochum.de>
-250 OK
-RCPT TO: <peter@gerwinski.de>
-250 Accepted
-DATA
-354 Enter message, ending with "." on a line by itself
-Lines: 5
-
-vor dem Punkt
-.
-na250 OK id=1qyV6A-00GXPs-Gi
-500 unrecognized command
-QUIT
-221 mx1.gerwinski.de closing connection
-cassini/home/peter/bo/2023ws/dbs/20231102>

20231102/smtp-04.txt

-cassini/home/peter/bo/2023ws/dbs/20231102> nc 88.198.170.60 25
-220 mx1.gerwinski.de ESMTP Exim 4.94.2 Thu, 02 Nov 2023 11:43:37 +0100
-HELO cassini
-250 mx1.gerwinski.de Hello cassini [195.37.15.82]
-MAIL FROM: Jeff Bezos <bezos@amazon.com>
-250 OK
-RCPT TO: Peter Gerwinski <peter@gerwinski.de>
-451-195.37.15.82 is not yet authorized to deliver mail from <bezos@amazon.com>
-451 to <peter@gerwinski.de>. Please try later.
-QUIT
-221 mx1.gerwinski.de closing connection
-cassini/home/peter/bo/2023ws/dbs/20231102> nc 88.198.170.60 25
-220 mx1.gerwinski.de ESMTP Exim 4.94.2 Thu, 02 Nov 2023 11:45:12 +0100
-HELO cassini
-250 mx1.gerwinski.de Hello cassini [195.37.15.82]
-MAIL FROM: Jeff Bezos <bezos@amazon.com>
-250 OK
-RCPT TO: Peter Gerwinski <peter@gerwinski.de>
-250 Accepted
-DATA
-354 Enter message, ending with "." on a line by itself
-From: Elon Musk <musk@tesla.com>
-To: Bill Gates <gates@microsoft.com>
-Subject: Darlehensangebot
-
-Brauchen Sie schnell Geld?
-Hier können Sie schnell Geld verlieren!
-Hier klicken und sämtliche Passwörter eingeben:
-[KLICK]
-.
-250 OK id=1qyVCl-00GXuG-JM
-QUIT
-221 mx1.gerwinski.de closing connection
-cassini/home/peter/bo/2023ws/dbs/20231102>

20231102/smtp-05.txt

-cassini/home/peter/bo/2023ws/dbs/20231102> nc 88.198.170.60 25
-220 mx1.gerwinski.de ESMTP Exim 4.94.2 Thu, 02 Nov 2023 11:51:13 +0100
-HELO cassini
-250 mx1.gerwinski.de Hello cassini [195.37.15.82]
-MAIL FROM: <bezos@amazon.com>
-250 OK
-RCPT TO: <peter.gerwinski@hs-bochum.de>
-550 relay not permitted
-QUIT
-221 mx1.gerwinski.de closing connection
-cassini/home/peter/bo/2023ws/dbs/20231102>

20231102/ssh-01.txt

-pgerwinski@main-0:~$ nc -l -p 1234
-Hallo?
-pgerwinski@main-0:~$
-
-8< ---------------------------------------------------------------------
-
-cassini/home/peter> nc main-0.cvh-server.de 1234
-main-0.cvh-server.de [88.99.194.201] 1234 (?) : Connection refused
-cassini/home/peter> ssh main-0.cvh-server.de
-Linux main-0 6.1.0-11-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.38-4 (2023-08-08) x86_64
-
-The programs included with the Debian GNU/Linux system are free software;
-the exact distribution terms for each program are described in the
-individual files in /usr/share/doc/*/copyright.
-
-Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
-permitted by applicable law.
-Last login: Thu Nov  2 12:56:11 2023 from 195.37.15.82
-pgerwinski@main-0:~$ nc localhost 1234
-Hallo?
-^C
-pgerwinski@main-0:~$ 

20231102/ssh-02.txt

-cassini/home/peter/bo/2023ws/dbs/20231102> ssh -X -L 2345:localhost:1234 main-0.cvh-server.de
-Linux main-0 6.1.0-11-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.38-4 (2023-08-08) x86_64
-
-The programs included with the Debian GNU/Linux system are free software;
-the exact distribution terms for each program are described in the
-individual files in /usr/share/doc/*/copyright.
-
-Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
-permitted by applicable law.
-Last login: Thu Nov  2 12:57:37 2023 from 195.37.15.82
-pgerwinski@main-0:~$ nc -l -p 1234
-Hallo, da bin ich! :-)
-
-8< ---------------------------------------------------------------------
-
-cassini/home/peter> nc localhost 2345
-Hallo, da bin ich! :-)

20231102/tcpdump-01.txt

-12:23:21.181037 IP 10.128.29.120.38042 > 195.37.15.39.22: Flags [P.], seq 3563445:3564597, ack 4140, win 501, length 1152
-12:23:21.181049 IP 195.37.15.39.22 > 10.128.29.120.38042: Flags [P.], seq 4140:4176, ack 3552141, win 5157, length 36
-12:23:21.181118 IP 195.37.15.39.22 > 10.128.29.120.38042: Flags [.], ack 3554577, win 5157, length 0
-12:23:21.181126 IP 195.37.15.39.22 > 10.128.29.120.38042: Flags [.], ack 3558097, win 5157, length 0
-12:23:21.182058 IP 195.37.15.39.22 > 10.128.29.120.38042: Flags [.], ack 3561017, win 5157, length 0
-12:23:21.182772 IP 195.37.15.39.22 > 10.128.29.120.38042: Flags [.], ack 3564597, win 5157, length 0
-12:23:21.189369 IP 10.128.29.120.36290 > 88.99.194.201.64738: UDP, length 101
-12:23:21.196348 IP 10.128.29.120.40313 > 88.99.194.245.443: Flags [P.], seq 274090:275179, ack 8103, win 2872, length 1089
-12:23:21.209739 IP 10.128.29.120.36290 > 88.99.194.201.64738: UDP, length 101
-12:23:21.222529 IP 10.128.29.120.38042 > 195.37.15.39.22: Flags [.], ack 4176, win 501, length 0
-12:23:21.223089 IP 88.99.194.245.443 > 10.128.29.120.40313: Flags [P.], seq 8103:8252, ack 275179, win 9243, length 149
-12:23:21.228356 IP 10.128.29.120.40313 > 88.99.194.245.443: Flags [P.], seq 275179:276140, ack 8252, win 2872, length 961
-12:23:21.230318 IP 10.128.29.120.36290 > 88.99.194.201.64738: UDP, length 101
-12:23:21.250856 IP 10.128.29.120.36290 > 88.99.194.201.64738: UDP, length 101
-12:23:21.257762 IP 88.99.194.245.443 > 10.128.29.120.40313: Flags [P.], seq 8252:8397, ack 276140, win 9243, length 145
-12:23:21.258390 IP 10.128.29.120.40313 > 88.99.194.245.443: Flags [P.], seq 276140:277241, ack 8397, win 2872, length 1101
-^C
-5545 packets captured
-5636 packets received by filter
-0 packets dropped by kernel
-cassini/root# tcpdump -n -i wlan0

20231102/tcpdump-02.txt

-12:26:16.721144 IP 10.128.29.120.36290 > 88.99.194.201.64738: UDP, length 102
-        0x0000:  45e0 0082 ad7c 4000 4011 48ea 0a80 1d78
-        0x0010:  5863 c2c9 8dc2 fce2 006e 7f77 e554 76a8
-        0x0020:  6ebc 46e3 aed0 e632 2a22 a62b 66b1 34c8
-        0x0030:  4465 dfef 8b40 7708 2129 11b4 3c03 f141
-        0x0040:  f376 bfbc 830c 5ff6 c575 f5a1 9771 3d12
-        0x0050:  067e 4b1c f274 8b39 9a52 ac02 a31b 9df0
-        0x0060:  7501 61f7 68b5 e8e2 c7b2 3f7d 610a d16b
-        0x0070:  78ab b056 31ff 76fb 9947 986c 40de 9fc6
-        0x0080:  559e
-12:26:16.729240 IP 10.128.29.120.40313 > 88.99.194.245.443: Flags [P.], seq 58714:59895, ack 1628, win 2913, length 1181
-        0x0000:  4500 04c5 42a5 4000 4006 b03d 0a80 1d78
-        0x0010:  5863 c2f5 9d79 01bb ef86 2a4c b23f f7b0
-        0x0020:  5018 0b61 e620 0000 1703 0304 9800 0000
-        0x0030:  0000 033e 7dc7 4216 6e0d c0df 4358 f7f6
-        0x0040:  ced5 c96c 9900 a44a 5dab 23b1 c190 5363
-        0x0050:  150a ee8d 86eb 516d 453b 0864 a391 e079
-        0x0060:  f4cc b00e 2b1d d4e0 39f3 0d15 6571 a4c6
-        0x0070:  e6af 732d 127c a63a 9401 00ef 312b 9365
-        0x0080:  e137 3e12 1fb3 e7bd 9bc4 db8e d452 b0a1
-        0x0090:  f76a 481f 2155 f22f 19a5 3d8e f7da 579d
-        0x00a0:  3025 d2a8 680e d872 67f8 ac36 218a 28e9
-        0x00b0:  e4ed 8dfc 65a0 94ec d467 5305 e4a0 d5ae
-        0x00c0:  e8c2 f366 f722 161d 20b2 f883 468a 65c1
-        0x00d0:  019a 9986 3955 3756 dcf6 0b4c 3718 8e9d
-        0x00e0:  aa71 3ef4 334d bc54 454b fe70 76c1 2e72
-        0x00f0:  318f 028c c106 5278 0514 c209 7a6e 862b
-        0x0100:  16ce eea6 411a 2756 e2bd a972 a55b 1381
-        0x0110:  f5df 618b 6369 13f6 12d0 2245 3870 831d
-        0x0120:  3c3d 6d4b 038a d775 9736 f13b 7f8c 8f17
-        0x0130:  956f 36a9 a41b ae8b 4060 3f3b f57a c1d1
-        0x0140:  72d8 dfd5 95ba cf56 0f1e b70f 10ad a466
-        0x0150:  9d10 677f 1602 92b4 4f6c ed04 6555 a7a0
-        0x0160:  ac94 addd 150d c955 ec93 2f33 8eb1 d689
-        0x0170:  88ee a417 e643 a396 eafe d8ed 5408 107d
-        0x0180:  00f0 bdb4 d8db 6883 b109 f4eb d930 7f31
-        0x0190:  42bb 5e41 8a9b 8a22 e51f 6407 88f0 1e9f
-        0x01a0:  014a 4c6b 17c5 fd9b 9382 c029 ab27 ce5d
-        0x01b0:  e922 0129 6ae9 60d9 e898 60ba 22be 138b
-        0x01c0:  396d c9a7 34a6 211b 275d bbf8 df0d fe8f
-        0x01d0:  4cd9 0c14 580e 77bd 1b94 43fb 5c31 9a37
-        0x01e0:  d297 09e1 1b6e 5455 fbbc 5321 4621 5a80
-        0x01f0:  ff5c 1747 4dce 4621 3525 797c 9a96 a2bf
-        0x0200:  88b5 978c f9cc 3782 823c f344 229e 04ce
-        0x0210:  c964 72eb a7a6 4fef 4f14 d7c1 998f fd48
-        0x0220:  649e 9047 97a8 e4c5 b538 20ed 81f6 2820
-        0x0230:  9728 29e9 165c 6ded 0b9b 58ab 64d2 5e1d
-        0x0240:  46cf 2394 0c2b f7f1 eda5 1e0e e4ed 72e5
-        0x0250:  ff3a 8460 bea5 4b11 a85b ab8d 6d29 4747
-        0x0260:  d240 4197 7225 5c97 c33c f724 36d0 2fb1
-        0x0270:  75c1 0991 9d0b 5c84 4955 e9d8 0dee 54fc
-        0x0280:  2405 c69a b97b e831 3ba4 da08 1041 9b3b
-        0x0290:  06c7 216a 1a47 6bc2 1b15 19d7 a214 9fe9
-        0x02a0:  d4ac b6ff 1af9 6bb1 bfa5 a84f ed8c 0a43
-        0x02b0:  fa1c 731c c2c1 3190 2833 0707 5745 36f9
-        0x02c0:  6d6b 355f 70d5 cbac 2662 6104 9020 3b8b
-        0x02d0:  4e28 1c1b 7477 d40f 2c48 8456 9bb0 9c86
-        0x02e0:  f176 f5fd 3e04 23fa 7bb3 aa12 47f2 94b6
-        0x02f0:  3d80 fe2f db2c 9854 e6da a3da 2c40 4b07
-        0x0300:  2079 d98e 52a6 f242 e088 3a5a faef c8fc
-        0x0310:  4017 42ba a78f 2d72 0d7e 8941 bdcc ce3e
-        0x0320:  8eb6 c030 08cb 3f68 8c2f 80df 2e90 d390
-        0x0330:  d75f f575 dea3 b078 0ffd c8a4 35c2 f8ea
-        0x0340:  381d 2014 7b11 6d58 78a6 6bf9 b770 1249
-        0x0350:  1766 b8a5 8943 3298 d0f3 5bad a329 ea2b
-        0x0360:  f061 7475 5ab7 e8fa 0dc9 85e0 c65b e1b8
-        0x0370:  f7ca 726c a650 40e3 f88e 8d74 ad9e 2372
-        0x0380:  01f0 fe5a c278 9a3b 4aaf 8cee 8004 6739
-        0x0390:  7aea c8a4 a4af bff1 3837 a4be ffc3 8a4a
-        0x03a0:  0740 f63f 347e bd07 fc3d 338d 3535 c61e
-        0x03b0:  ba22 f4c4 20fa 092c bbb6 03d7 03e0 9d22
-        0x03c0:  b360 0e23 1b2b ed54 6d0e 6935 c30a c5ce
-        0x03d0:  9c4f 6870 6b48 2083 a9ae cf7a 09b2 ffbf
-        0x03e0:  5957 0030 eb89 12eb de08 56b6 25b3 f33c
-        0x03f0:  7275 ceb6 cbd7 1f60 e8cf c362 dcef f06e
-        0x0400:  5449 5204 aec4 c666 2743 0f51 51d1 442d
-        0x0410:  3f78 eaf1 ce3e 1b91 5a44 3f11 fd73 9999
-        0x0420:  4afe bbc2 6a65 660a 4b73 0070 30c7 4798
-        0x0430:  b6b3 0059 ded5 3ee4 6a38 751f a5a8 8350
-        0x0440:  849c 92fe b7b9 6f09 2ca8 72b0 4943 f247
-        0x0450:  ec4d 62f1 8b9c 2fd4 2af9 a5e0 e6ba 5b39
-        0x0460:  3ccb 635d a6b5 757c 6743 de67 4d11 6af9
-        0x0470:  0337 b09b cf5c 76d8 58d4 9bea 5493 0d18
-        0x0480:  bd1e 7d13 5351 2693 c3f1 ead8 5b64 065c
-        0x0490:  51cc 5833 e73f 7290 d987 8454 24d2 8fad
-        0x04a0:  94c0 55b5 d9f0 9ac3 2c69 d14c bfb7 5052
-        0x04b0:  2390 afc6 d666 8edb 7931 c7e9 1544 11da
-        0x04c0:  7cbd 7647 a1
-^C
-803 packets captured
-817 packets received by filter
-0 packets dropped by kernel
-cassini/root# tcpdump -n -i wlan0 -x

20231102/tcpdump-03.txt

-cassini/root# tcpdump -n -i lo -x port 1234
-tcpdump: verbose output suppressed, use -v[v]... for full protocol decode
-listening on lo, link-type EN10MB (Ethernet), snapshot length 262144 bytes
-12:31:29.286657 IP 127.0.0.1.55462 > 127.0.0.1.1234: Flags [S], seq 3414759276, win 65495, options [mss 65495,sackOK,TS val 2171609293 ecr 0,nop,wscale 7], length 0
-        0x0000:  4500 003c 344e 4000 4006 086c 7f00 0001
-        0x0010:  7f00 0001 d8a6 04d2 cb89 176c 0000 0000
-        0x0020:  a002 ffd7 fe30 0000 0204 ffd7 0402 080a
-        0x0030:  8170 20cd 0000 0000 0103 0307
-12:31:29.286668 IP 127.0.0.1.1234 > 127.0.0.1.55462: Flags [S.], seq 1205734117, ack 3414759277, win 65483, options [mss 65495,sackOK,TS val 2171609293 ecr 2171609293,nop,wscale 7], length 0
-        0x0000:  4500 003c 0000 4000 4006 3cba 7f00 0001
-        0x0010:  7f00 0001 04d2 d8a6 47de 0ae5 cb89 176d
-        0x0020:  a012 ffcb fe30 0000 0204 ffd7 0402 080a
-        0x0030:  8170 20cd 8170 20cd 0103 0307
-12:31:29.286679 IP 127.0.0.1.55462 > 127.0.0.1.1234: Flags [.], ack 1, win 512, options [nop,nop,TS val 2171609293 ecr 2171609293], length 0
-        0x0000:  4500 0034 344f 4000 4006 0873 7f00 0001
-        0x0010:  7f00 0001 d8a6 04d2 cb89 176d 47de 0ae6
-        0x0020:  8010 0200 fe28 0000 0101 080a 8170 20cd
-        0x0030:  8170 20cd
-12:31:53.307321 IP 127.0.0.1.55462 > 127.0.0.1.1234: Flags [P.], seq 1:8, ack 1, win 512, options [nop,nop,TS val 2171633313 ecr 2171609293], length 7
-        0x0000:  4500 003b 3450 4000 4006 086b 7f00 0001
-        0x0010:  7f00 0001 d8a6 04d2 cb89 176d 47de 0ae6
-        0x0020:  8018 0200 fe2f 0000 0101 080a 8170 7ea1
-        0x0030:  8170 20cd 4861 6c6c 6f3f 0a
-12:31:53.307355 IP 127.0.0.1.1234 > 127.0.0.1.55462: Flags [.], ack 8, win 512, options [nop,nop,TS val 2171633313 ecr 2171633313], length 0
-        0x0000:  4500 0034 2140 4000 4006 1b82 7f00 0001
-        0x0010:  7f00 0001 04d2 d8a6 47de 0ae6 cb89 1774
-        0x0020:  8010 0200 fe28 0000 0101 080a 8170 7ea1
-        0x0030:  8170 7ea1
-
-8< ---------------------------------------------------------------------
-
-cassini/home/peter> nc localhost 1234
-Hallo?
-
-8< ---------------------------------------------------------------------
-
-cassini/home/peter> nc -p 1234 -l
-Hallo?

20231102/tcpdump-04.txt

-cassini/root# tcpdump -n -i lo -A port 1234
-tcpdump: verbose output suppressed, use -v[v]... for full protocol decode
-listening on lo, link-type EN10MB (Ethernet), snapshot length 262144 bytes
-12:34:11.379210 IP 127.0.0.1.55462 > 127.0.0.1.1234: Flags [P.], seq 3414759284:3414759291, ack 1205734118, win 512, options [nop,nop,TS val 2171771385 ecr 2171633313], length 7
-E..;4Q@.@..j...............tG.
-....../.....
-.r...p~.Hallo.
-
-12:34:11.379228 IP 127.0.0.1.1234 > 127.0.0.1.55462: Flags [.], ack 7, win 512, options [nop,nop,TS val 2171771385 ecr 2171771385], length 0
-E..4!A@.@...............G.
-....{.....(.....
-.r...r..
-12:34:23.626460 IP 127.0.0.1.1234 > 127.0.0.1.55462: Flags [P.], seq 1:12, ack 7, win 512, options [nop,nop,TS val 2171783632 ecr 2171771385], length 11
-E..?!B@.@..u............G.
-....{.....3.....
-.r...r..Hier auch.
-
-12:34:23.626469 IP 127.0.0.1.55462 > 127.0.0.1.1234: Flags [.], ack 12, win 512, options [nop,nop,TS val 2171783632 ecr 2171783632], length 0
-E..44R@.@..p...............{G.
-......(.....
-.r...r..
-
-8< ---------------------------------------------------------------------
-
-cassini/home/peter> nc localhost 1234
-Hallo?
-Hallo.
-Hier auch.
-
-8< ---------------------------------------------------------------------
-
-cassini/home/peter> nc -p 1234 -l
-Hallo?
-Hallo.
-Hier auch.

20231102/test.mbox

-From peter.gerwinski@hs-bochum.de Thu Nov 02 11:28:04 2023
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-From: Prof. Dr. rer. nat. Peter Gerwinski <peter.gerwinski@hs-bochum.de>
-To: Peter Gerwinski <peter@gerwinski.de>
-Subject: Test
-Message-Id: <E1qyUvX-004dnN-0r@cassini>
-Date: Thu, 02 Nov 2023 11:28:04 +0100
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-Hallo,
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-dies ist ein Test.
-
-Schöne Grüße!
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-From peter.gerwinski@hs-bochum.de Thu Nov 02 11:37:29 2023
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-From bezos@amazon.com Thu Nov 02 11:47:00 2023
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-From: Elon Musk <musk@tesla.com>
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-Subject: Darlehensangebot
-Message-Id: <E1qyVDr-004eg5-0R@cassini>
-Date: Thu, 02 Nov 2023 11:47:00 +0100
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-Brauchen Sie schnell Geld?
-Hier können Sie schnell Geld verlieren!
-Hier klicken und sämtliche Passwörter eingeben:
-[KLICK]
-

20231109/dbms-02.txt

-postgres=# \l
-                                                 Liste der Datenbanken
-   Name    | Eigentümer | Kodierung | Sortierfolge | Zeichentyp  | ICU-Locale | Locale-Provider |  Zugriffsprivilegien
------------+------------+-----------+--------------+-------------+------------+-----------------+-----------------------
- postgres  | postgres   | UTF8      | de_DE.UTF-8  | de_DE.UTF-8 |            | libc            |
- template0 | postgres   | UTF8      | de_DE.UTF-8  | de_DE.UTF-8 |            | libc            | =c/postgres          +
-           |            |           |              |             |            |                 | postgres=CTc/postgres
- template1 | postgres   | UTF8      | de_DE.UTF-8  | de_DE.UTF-8 |            | libc            | =c/postgres          +
-           |            |           |              |             |            |                 | postgres=CTc/postgres
-(3 Zeilen)
-
-postgres=# create database testdb;
-CREATE DATABASE
-postgres=# create user dbs with password '####';
-CREATE ROLE
-postgres=# GRANT ALL ON DATABASE testdb TO dbs;
-GRANT
-postgres=# \q
-postgres@cassini:~$

20231109/dbms-03.txt

-cassini/home/peter/bo/2023ws/dbs> psql --help
-psql ist das interaktive PostgreSQL-Terminal.
-
-Aufruf:
-  psql [OPTION]... [DBNAME [BENUTZERNAME]]
-
-Allgemeine Optionen:
-  -c, --command=ANWEISUNG  einzelne Anweisung ausführen und beenden
-  -d, --dbname=DBNAME      Datenbank, zu der verbunden werden soll
-                           (Standard: »peter«)
-  -f, --file=DATEINAME     Anweisungen aus Datei ausführen und danach beenden
-  -l, --list               verfügbare Datenbanken auflisten und beenden
-  -v, --set=, --variable=NAME=WERT
-                           psql-Variable NAME auf WERT setzen
-                           (z.B. -v ON_ERROR_STOP=1)
-  -V, --version            Versionsinformationen anzeigen, dann beenden
-  -X, --no-psqlrc          Startdatei (~/.psqlrc) nicht lesen
-  -1 (»eins«), --single-transaction
-                           als eine einzige Transaktion ausführen (wenn nicht
-                           interaktiv)
-  -?, --help[=options]     diese Hilfe anzeigen, dann beenden
-      --help=commands      Backslash-Befehle auflisten, dann beenden
-      --help=variables     besondere Variablen auflisten, dann beenden
-
-Eingabe- und Ausgabeoptionen:
-  -a, --echo-all           Skript-Inhalt wiedergeben
-  -b, --echo-errors        fehlgeschlagene Anweisungen wiedergeben
-  -e, --echo-queries       an den Server geschickte Anweisungen zeigen
-  -E, --echo-hidden        von internen Anweisungen erzeugte Anfragen zeigen
-  -L, --log-file=DATEINAME
-                           Sitzungslog in Datei senden
-  -n, --no-readline        erweiterte Zeilenbearbeitung (Readline) ausschalten
-  -o, --output=DATEINAME   Anfrageergebnisse in Datei (oder |Pipe) senden
-  -q, --quiet              stille Ausführung (keine Mitteilungen, nur
-                           Anfrageergebnisse)
-  -s, --single-step        Einzelschrittmodus (jede Anfrage bestätigen)
-  -S, --single-line        Einzelzeilenmodus (Zeilenende beendet SQL-Anweisung)
-
-Ausgabeformatoptionen:
-  -A, --no-align           unausgerichteter Tabellenausgabemodus
-      --csv                Tabellenausgabemodus CSV (Comma-Separated Values)
-  -F, --field-separator=ZEICHEN
-                           Feldtrennzeichen für unausgerichteten Ausgabemodus
-                           (Standard: »|«)
-  -H, --html               HTML-Tabellenausgabemodus
-  -P, --pset=VAR[=ARG]     Ausgabeoption VAR auf ARG setzen (siehe
-                           \pset-Anweisung)
-  -R, --record-separator=ZEICHEN
-                           Satztrennzeichen für unausgerichteten Ausgabemodus
-                           (Standard: Newline)
-  -t, --tuples-only        nur Datenzeilen ausgeben
-  -T, --table-attr=TEXT    HTML »table«-Tag-Attribute setzen (z.B. width, border)
-  -x, --expanded           erweiterte Tabellenausgabe einschalten
-  -z, --field-separator-zero
-                           Feldtrennzeichen für unausgerichteten Ausgabemodus auf
-                           Null-Byte setzen
-  -0, --record-separator-zero
-                           Satztrennzeichen für unausgerichteten Ausgabemodus auf
-                           Null-Byte setzen
-
-Verbindungsoptionen:
-  -h, --host=HOSTNAME      Hostname des Datenbankservers oder
-                           Socket-Verzeichnis (Standard: »/var/run/postgresql«)
-  -p, --port=PORT          Port des Datenbankservers (Standard: »5432«)
-  -U, --username=NAME      Datenbank-Benutzername (Standard: »peter«)
-  -w, --no-password        niemals nach Passwort fragen
-  -W, --password           nach Passwort fragen (sollte automatisch geschehen)
-
-Für mehr Informationen, geben Sie »\?« (für interne Anweisungen) oder
-»\help« (für SQL-Anweisungen) in psql ein oder schauen Sie in den psql-
-Abschnitt der PostgreSQL-Dokumentation.
-
-Berichten Sie Fehler an <pgsql-bugs@lists.postgresql.org>.
-PostgreSQL Homepage: <https://www.postgresql.org/>
-cassini/home/peter/bo/2023ws/dbs> psql testdb dbs
-psql: Fehler: Verbindung zum Server auf Socket »/var/run/postgresql/.s.PGSQL.5432« fehlgeschlagen: FATAL:  Peer-Authentifizierung für Benutzer »dbs« fehlgeschlagen
-cassini/home/peter/bo/2023ws/dbs> psql --password testdb dbs
-Passwort:
-psql: Fehler: Verbindung zum Server auf Socket »/var/run/postgresql/.s.PGSQL.5432« fehlgeschlagen: FATAL:  Peer-Authentifizierung für Benutzer »dbs« fehlgeschlagen
-cassini/home/peter/bo/2023ws/dbs>

20231109/dbms-04.txt

-root@cassini:~# su - postgres
-postgres@cassini:~$ psql
-psql (15.3 (Debian 15.3-0+deb12u1))
-Geben Sie »help« für Hilfe ein.
-
-postgres=# \c testdb
-Sie sind jetzt verbunden mit der Datenbank »testdb« als Benutzer »postgres«.
-testdb=# \d
-Keine Relationen gefunden
-testdb=# CREATE TABLE Tier ( Name CHARACTER (30), Tierart CHARACTER (30) );
-CREATE TABLE
-testdb=# \d
-         Liste der Relationen
- Schema | Name |   Typ   | Eigentümer
---------+------+---------+------------
- public | tier | Tabelle | postgres
-(1 Zeile)
-
-testdb=#