Portál AbcLinuxu, 19. července 2025 10:52
#!/bin/bash firewall=`which iptables` reset() { $firewall -X $firewall -F INPUT $firewall -F OUTPUT $firewall -F FORWARD } start() { # INPUT DROP $firewall -P INPUT DROP $firewall -P OUTPUT ACCEPT $firewall -P FORWARD ACCEPT # # INPUT CHAIN : #=============== # # VSE JIZ NAVAZANE $firewall -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT # # POVOLENI + OMEZENI PINGU $firewall -A INPUT -p ICMP --icmp-type echo-request -m limit --limit 10/s --l$ # !AUTH # $firewall -A INPUT -p TCP --dport 113 -j REJECT # SSH $firewall -A INPUT -m state --state NEW -p TCP --dport 22 -j ACCEPT # SWAT $firewall -A INPUT -m state --state NEW -p TCP --dport 901 -j ACCEPT #$firewall -A INPUT -i eth2 -m state --state NEW -p TCP --dport 901 -j ACCEPT # CUPS # $firewall -A INPUT -m state --state NEW -p TCP --dport 631 -j ACCEPT $firewall -A INPUT -i eth2 -m state --state NEW -p TCP --dport 631 -j ACCEPT # HTTP (80 standard) $firewall -A INPUT -m state --state NEW -p TCP --dport 80 -j ACCEPT # MySQL $firewall -A INPUT -m state --state NEW -p TCP --dport 3306 -j ACCEPT # SMTP # $firewall -A INPUT -m state --state NEW -p TCP --dport 25 -j ACCEPT # $firewall -A INPUT -m state --state NEW -p TCP --dport 465 -j ACCEPT # IMAP # $firewall -A INPUT -m state --state NEW -p TCP --dport 143 -j ACCEPT # $firewall -A INPUT -m state --state NEW -p TCP --dport 993 -j ACCEPT # POP3 # $firewall -A INPUT -m state --state NEW -p TCP --dport 110 -j ACCEPT # $firewall -A INPUT -m state --state NEW -p TCP --dport 993 -j ACCEPT # LOOPBACK -> LOOPBACK $firewall -A INPUT -i lo -s 127.0.0.1 -d 127.0.0.1 -j ACCEPT # SNAT $firewall -t nat -A POSTROUTING -o eth0 -j MASQUERADE # ZBYTEK LOGUJEME # $firewall -A INPUT -j LOG --log-level debug } # stop() { # VSE POVOLIME $firewall -P INPUT ACCEPT $firewall -P OUTPUT ACCEPT $firewall -P FORWARD ACCEPT } # case "$1" in start|restart) reset start exit 0 ;; stop) reset stop exit 0 ;; *) echo "Usage: $0 {start|stop|restart}" exit 1 ;; esacPPS:
[root@localhost uzivatel]# nmap -v 194.108.205.129 Starting Nmap 4.20 ( http://insecure.org ) at 2007-08-23 23:00 CEST Initiating SYN Stealth Scan at 23:00 Scanning z_netu (194.108.205.129) [1697 ports] Discovered open port 22/tcp on 194.108.205.129 Discovered open port 80/tcp on 194.108.205.129 Discovered open port 901/tcp on 194.108.205.129 Discovered open port 3306/tcp on 194.108.205.129 Completed SYN Stealth Scan at 23:01, 21.70s elapsed (1697 total ports) Host z_netu (194.108.205.129) appears to be up ... good. Interesting ports on z_netu (194.108.205.129): Not shown: 1693 filtered ports PORT STATE SERVICE 22/tcp open ssh 80/tcp open http 901/tcp open samba-swat 3306/tcp open mysql
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