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Commit f1d1e349 authored by Peter Gerwinski's avatar Peter Gerwinski
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Beispiele und Screenshots 2.11.2023

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20231102/dbs-20231102.pdf
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20231102/dbs-20231102.tex
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......@@ -529,9 +529,7 @@
\vbitno{64}\databitbox{32}{data}
\end{center}
\end{frame}
\begin{frame}
\bigskip
ICMP-Paket: transportiert Steuernachrichten
......
20231102/hello-01 0 → 100755
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#!/bin/bash
echo "Hello, world!"
20231102/hello-02 0 → 100755
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#!/bin/bash
echo -n "Name: "
read name
echo "Hallo, $name!"
20231102/http-01.txt 0 → 100644
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cassini/home/peter/bo/2023ws/dbs/20231102> nc 88.198.170.60 80
GET /
HTTP/1.1 400 Bad Request
Date: Thu, 02 Nov 2023 10:54:35 GMT
Server: Apache/2.4.56 (Debian)
Content-Length: 308
Connection: close
Content-Type: text/html; charset=iso-8859-1
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>400 Bad Request</title>
</head><body>
<h1>Bad Request</h1>
<p>Your browser sent a request that this server could not understand.<br />
</p>
<hr>
<address>Apache/2.4.56 (Debian) Server at m31.gerwinski.de Port 80</address>
</body></html>
cassini/home/peter/bo/2023ws/dbs/20231102> nc 88.198.170.60 80
GET /^M
<!doctype html public "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title>ngc224.gerwinski.de</title>
</head>
<body background="ngc224.jpg" bgcolor="#000000" text="#CFCFCF"
link="#7F7FFF" alink="#CFCFFF" vlink="#FF5FFF">
<h1>ngc224.gerwinski.de - der Server</h1>
<p>Benannt nach der Andromeda-Galaxie - M31 - NGC224
<p align="center"><img src="null.png" alt="" width="1" height="1" vspace="360">
<p><font size="-2"><a href="http://www.peter.gerwinski.de">Peter Gerwinski</a><br>
<a href="http://www.noao.edu/image_gallery/html/im0424.html">Bild:
Bill Schoening, Vanessa Harvey/REU program/NOAO/AURA/NSF</a></font>
</body>
</html>
cassini/home/peter/bo/2023ws/dbs/20231102>
20231102/routing-01.txt 0 → 100644
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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 0 → 100644
+ 9
− 0
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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 0 → 100644
+ 28
− 0
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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 0 → 100644
+ 14
− 0
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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 0 → 100644
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− 0
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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 0 → 100644
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− 0
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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 0 → 100644
+ 23
− 0
View file @ f1d1e349
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 0 → 100644
+ 19
− 0
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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 0 → 100644
+ 34
− 0
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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 0 → 100644
+ 11
− 0
View file @ f1d1e349
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 0 → 100644
+ 22
− 0
View file @ f1d1e349
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 0 → 100644
+ 17
− 0
View file @ f1d1e349
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 0 → 100644
+ 21
− 0
View file @ f1d1e349
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 0 → 100644
+ 93
− 0
View file @ f1d1e349
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 0 → 100644
+ 38
− 0
View file @ f1d1e349
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?
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