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Commit 34d1e62d authored by Peter Gerwinski's avatar Peter Gerwinski
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Screenshots 14.11.2024

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20241120/iptables-01.txt 0 → 100644
+ 21
− 0
View file @ 34d1e62d
cassini/root# iptables --list
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
cassini/root# iptables -A OUTPUT -p tcp --dport 80 -j REJECT
cassini/root# iptables --list
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
REJECT tcp -- anywhere anywhere tcp dpt:http reject-with icmp-port-unreachable
cassini/root#
20241120/iptables-02.txt 0 → 100644
+ 3
− 0
View file @ 34d1e62d
cassini/home/peter/bo/2024ws/dbs/20241120> nc ngc224.gerwinski.de 80
m31.gerwinski.de [88.198.170.60] 80 (http) : Connection refused
cassini/home/peter/bo/2024ws/dbs/20241120>
20241120/iptables-03.txt 0 → 100644
+ 22
− 0
View file @ 34d1e62d
cassini/root# iptables -A OUTPUT -p tcp --dport 80 -j REJECT
cassini/root# iptables --list
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
REJECT tcp -- anywhere anywhere tcp dpt:http reject-with icmp-port-unreachable
cassini/root# iptables -D OUTPUT -p tcp --dport 80 -j REJECT
cassini/root# iptables --list
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
cassini/root#
20241120/iptables-04.txt 0 → 100644
+ 19
− 0
View file @ 34d1e62d
cassini/home/peter/bo/2024ws/dbs/20241120> nc ngc224.gerwinski.de 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/2024ws/dbs/20241120>
20241120/iptables-05.txt 0 → 100644
+ 13
− 0
View file @ 34d1e62d
cassini/root# iptables -A OUTPUT -p tcp --dport 80 -j DROP
cassini/root# iptables --list
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
DROP tcp -- anywhere anywhere tcp dpt:http
cassini/root#
20241120/iptables-06.txt 0 → 100644
+ 14
− 0
View file @ 34d1e62d
cassini/home/peter/bo/2024ws/dbs/20241120> nc ngc224.gerwinski.de 80
GET /^M
^C
cassini/home/peter/bo/2024ws/dbs/20241120> nc -v ngc224.gerwinski.de 80
DNS fwd/rev mismatch: m31.gerwinski.de != mx1.gerwinski.de
GET /^M
^C
cassini/home/peter/bo/2024ws/dbs/20241120> nc -v ngc224.gerwinski.de 443
DNS fwd/rev mismatch: m31.gerwinski.de != mx1.gerwinski.de
m31.gerwinski.de [88.198.170.60] 443 (https) open
SSH-2.0-OpenSSH_9.2p1 Debian-2+deb12u3
Invalid SSH identification string.
cassini/home/peter/bo/2024ws/dbs/20241120>
20241120/iptables-07.txt 0 → 100644
+ 11
− 0
View file @ 34d1e62d
cassini/root# iptables -A OUTPUT -p tcp --destination 88.198.170.60 --dport 80 -j REJECT
cassini/root# iptables --list Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
REJECT tcp -- anywhere mx1.gerwinski.de tcp dpt:http reject-with icmp-port-unreachable
cassini/root#
20241120/iptables-08.txt 0 → 100644
+ 24
− 0
View file @ 34d1e62d
cassini/root# iptables -A OUTPUT -p tcp -m state --state ESTABLISHED,RELATED -j ACCEPT
cassini/root# iptables --list
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
ACCEPT tcp -- anywhere anywhere state RELATED,ESTABLISHED
cassini/root# iptables -A OUTPUT -p tcp -m state --state NEW -j LOG
cassini/root# iptables --list
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
ACCEPT tcp -- anywhere anywhere state RELATED,ESTABLISHED
LOG tcp -- anywhere anywhere state NEW LOG level warn
cassini/root#
20241120/iptables-09.txt 0 → 100644
+ 17
− 0
View file @ 34d1e62d
cassini/home/peter/bo/2024ws/dbs/20241120> nc ngc224.gerwinski.de 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/2024ws/dbs/20241120>
20241120/iptables-10.txt 0 → 100644
+ 7
− 0
View file @ 34d1e62d
cassini/root# journalctl -f -k
[...]
Nov 20 14:03:01 cassini kernel: IN= OUT=wlan0 SRC=10.128.29.177 DST=88.198.170.60 LEN=60 TOS=0x00 PREC=0x00 TTL=64 ID=39957 DF PROTO=TCP SPT=59150 DPT=80 WINDOW=64240 RES=0x00 SYN URGP=0
Nov 20 14:03:12 cassini kernel: IN= OUT=wlan0 SRC=10.128.29.177 DST=195.37.15.39 LEN=60 TOS=0x00 PREC=0x00 TTL=64 ID=57995 DF PROTO=TCP SPT=59442 DPT=443 WINDOW=64240 RES=0x00 SYN URGP=0
Nov 20 14:03:12 cassini kernel: IN= OUT=wlan0 SRC=10.128.29.177 DST=195.37.15.39 LEN=60 TOS=0x00 PREC=0x00 TTL=64 ID=61862 DF PROTO=TCP SPT=59456 DPT=443 WINDOW=64240 RES=0x00 SYN URGP=0
^C
cassini/root#
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