Networking

Agate on Arch Linux

Docs are here. You will need DNS set up before proceeding. Install agate. yay -S agate Be root! In my case the domain is 'splint.rs'. DOMAIN1=splint.rs You can set up any number of domain names. DOMAIN2=ttrpgs.com Make a directory to serve the gemini files from: GEMDIR=/srv/gemini mkdir -p $GEMDIR/$DOMAIN1 mkdir -p …

dns

1 min read · networking host

Record Type Example A Record IPv4 Address "$domain".com AAAA Record IPv4 Address "$domain".com CNAME Alternative Address "$domain".rs, "$subdomain.$domain".com NS Nameserver ns1.fastname.com MX Email server "$domain".com TXT Literally anything,including ownership of a domain Query a host with the host command. 1host …

Download Website

1 min read · networking scraping

1domain=splint.rs 2mkdir $domain 3cd $domain 4wget --recursive --convert-links --backup-converted \ 5 --page-requisites --level=inf --adjust-extension \ 6 -U "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)" \ 7 -p --mirror --html-extension --convert-links \ 8$domain

Easy Network Graph

3 min read · networking

Set up a file like this, called troubleshooting.txt. [ Is there an IP address? ] -- no --> [ Check NIC driver, dmesg ] [ Is there an IP address? ] -- yes --> [ Can you ping the router? ] [ Can you ping the router? ] -- no --> [ Check cables, router, and switches ] [ Can you ping the router? ] -- yes --> [ Can you ping …

fail2ban

1 min read · networking

SSH Daemon Jail 1sudo cp /etc/fail2ban/jail.conf /etc/fail2ban/jail.d/ssh.local 1[sshd] 2enabled = true 3 4ignoreip = 127.0.0.1/8 ::1,192.168.0.0/16 ::1 1sudo systemctl restart fail2ban 1sudo fail2ban-client status 1sudo fail2ban-client status sshd

iptables

2 min read · networking

Intro This is a basic Linux firewall program. Look at your firewalls: 1iptables -L We see the output of input, output and forwarding rules. Forward I don't need any forwarding, so I'm going to drop all forwarding: 1iptables -P FORWARD DROP Input Let's 'A'dd, or 'A'ppend a rule with -A. Let's drop all input from a …

Mapping the Net

1 min read · networking graph fun

Find the path to a domain: 1domain=bad.horse 2max_hops=50 3 4tracepath -m $maximum_hops $domain If you're on Debian, you can use graph-easy and dothost to make an instant diagram: 1domain=dice.camp 2dothost $domain | graph-easy --boxart

network

1 min read · networking

Netstat Stuff Stats on local net usage within domain. 1iftop -p -n 1whois domain.com Info on domain, whether it's taken, et c.: 1dig domain.com 1ifconfig Versatile wifi tool: 1nmcli Examples You want to connect to the internet. 1sudo iwconfig Get knowledge of wireless state. The output might be: wlp3s0 IEEE 802.11 …

nginx

2 min read · networking web

Install nginx: 1sudo apt-get install nginx 1sudo apt-get enable --now nginx Put a website somewhere: 1mkdir /var/www/html/mysite/ Put an index file there: 1vim /var/www/html/mysite/index.html Make the owner www-data 1chown -R www-data:www-data /var/www/html/mysite/ Make a configuration file for nginx: 1vim …

nmap

1 min read · networking

Example: 1nmap 192.168.1.1/24 Flags: Flag Meaning Effect -F Fast First 100 ports only Look for a web server, which has ports 80 and 443 open: 1nmap 192.168.1.1/24 -p 80,443 --open