root@azvir-2023-09-26:/etc# ls
adduser.conf cron.daily group ldap manpath.config passwd rmt supervisor
alternatives cron.hourly group- ld.so.cache mime.types passwd- rpc sysctl.conf
apm cron.monthly grub.d ld.so.conf mke2fs.conf perl rsyslog.conf sysctl.d
apparmor crontab gshadow ld.so.conf.d modprobe.d pm rsyslog.d systemd
apparmor.d cron.weekly gshadow- legal modules popularity-contest.conf screenrc terminfo
apt dbus-1 gss libaudit.conf modules-load.d profile securetty timezone
at.allow debconf.conf hdparm.conf libnl-3 motd profile.d security tmpfiles.d
bash.bashrc debian_version host.conf locale.alias mtab protocols selinux ucf.conf
bash_completion default hostname locale.gen nanorc python services udev
bash_completion.d deluser.conf hosts localtime netplan python2.7 shadow ufw
bindresvport.blacklist depmod.d hosts.allow logcheck network python3 shadow- updatedb.conf
binfmt.d dhcp hosts.deny login.defs networkd-dispatcher python3.6 shells update-manager
ca-certificates dictionaries-common init.d logrotate.conf NetworkManager rc0.d skel update-motd.d
ca-certificates.conf dpkg initramfs-tools logrotate.d networks rc1.d ssh vim
ca-certificates.conf.dpkg-old emacs inputrc lsb-release newt rc2.d ssl vtrgb
calendar environment iproute2 ltrace.conf nginx rc3.d subgid wgetrc
cloud fonts iptables machine-id nsswitch.conf rc4.d subgid- X11
console-setup fstab issue magic opt rc5.d subuid xdg
cracklib fuse.conf issue.net magic.mime os-release rc6.d subuid- zsh_command_not_found
cron.allow gai.conf kernel mailcap pam.conf rcS.d sudoers
cron.d groff kernel-img.conf mailcap.order pam.d resolv.conf sudoers.d
root@azvir-2023-09-26:/etc# cat /etc/resolv.conf
nameserver 77.88.8.25
root@azvir-2023-09-26:/etc# ping 77.88.8.25
PING 77.88.8.25 (77.88.8.25) 56(84) bytes of data.
ping: sendmsg: Operation not permitted
ping: sendmsg: Operation not permitted
ping: sendmsg: Operation not permitted
ping: sendmsg: Operation not permitted
^Z
[3]+ Stopped ping 77.88.8.25
root@azvir-2023-09-26:/etc# iptables -L
Chain INPUT (policy DROP)
target prot opt source destination
ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED
ACCEPT all -- anywhere anywhere
ACCEPT tcp -- anywhere anywhere tcp dpt:1322
ACCEPT udp -- anywhere anywhere udp spt:domain dpts:1024:65535
ACCEPT tcp -- anywhere anywhere tcp dpt:http
Chain FORWARD (policy DROP)
target prot opt source destination
Chain OUTPUT (policy DROP)
target prot opt source destination
ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED
ACCEPT all -- anywhere anywhere
ACCEPT udp -- anywhere anywhere udp dpt:domain
ACCEPT tcp -- anywhere anywhere tcp dpt:http
ACCEPT tcp -- anywhere anywhere tcp dpt:https
root@azvir-2023-09-26:/etc# man ping
root@azvir-2023-09-26:/etc# tcpdump -help
tcpdump version 4.9.3
libpcap version 1.8.1
OpenSSL 1.1.1 11 Sep 2018
Usage: tcpdump [-aAbdDefhHIJKlLnNOpqStuUvxX#] [ -B size ] [ -c count ]
[ -C file_size ] [ -E algo:secret ] [ -F file ] [ -G seconds ]
[ -i interface ] [ -j tstamptype ] [ -M secret ] [ --number ]
[ -Q in|out|inout ]
[ -r file ] [ -s snaplen ] [ --time-stamp-precision precision ]
[ --immediate-mode ] [ -T type ] [ --version ] [ -V file ]
[ -w file ] [ -W filecount ] [ -y datalinktype ] [ -z postrotate-command ]
[ -Z user ] [ expression ]
root@azvir-2023-09-26:/etc# tcpdump
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes
^Z
[4]+ Stopped tcpdump
root@azvir-2023-09-26:/etc# ifconfig
Command 'ifconfig' not found, but can be installed with:
apt install net-tools
root@azvir-2023-09-26:/etc# uptime
16:10:00 up 23:36, 1 user, load average: 0.00, 0.00, 0.00
root@azvir-2023-09-26:/etc# iptables -F
client_loop: send disconnect: Broken pipe