Christian Klein
106 lines
2.3 KiB
Markdown
106 lines
2.3 KiB
Markdown
# Network Alpine
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Just an alpine image with common packages for network troubleshooting installed:
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* General Stuff
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* bash
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* wget
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* jq
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* pv
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* git
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* vim
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* nano
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* python3
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* Querying Common Protocols
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* curl
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* openssh
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* lftp
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* Network Serving
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* lighttpd
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* lldpd
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* Network Query
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* bind-tools (dig)
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* tcpdump
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* socat
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* iperf, iperf3
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* nmap
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* fping
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By default a HTTP Server is available on port 80. Change the port with `HTTP_SERVER_PORT`.
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> [!CAUTION]
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> This is only meant to be used inside testing networks. Do NOT use for production!
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## Example Use Cases
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```bash
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# See current IP configuration
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ip address
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ip route
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# Set IP address
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ip address add 10.1.1.3/24 dev eth0
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ip address add broadcast 10.1.2.255 dev eth0
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# Set Gateway
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ip route del default
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ip route add default 10.1.1.0/24 via 10.1.1.3
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# Request new IP address via DHCP
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ip addr flush dev eth0
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udhcpc -i eth0 -n -q
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# Set DNS
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nano /etc/resolv.conf # Update line "namesperver x.x.x.x"
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# Query DNS
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dig example.com A @10.1.1.3
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# List LLDP neighbors
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lldpcli show neighbors
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# Ping a host
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ping -I eth0 10.1.1.3
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# Send HTTP Request
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curl http://10.1.1.3 -v
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# Connect somewhere via SSH
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ssh user@10.1.1.3 -p 22
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# Copy file via SFTP
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scp file.txt user@10.1.1.3:~
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# Interactively browse FTP server
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lftp ftp://user@10.1.1.3
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# Connect to a TCP port
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nc 10.1.1.3 80
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# Scan for open TCP ports
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nmap -sT -p 22-10000 10.1.1.3
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# Ping all IPs in the network
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fping -g -r 1 -q -a 10.1.1.0/24
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# Capture network traffic
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tcpdump # Capture ALL traffic
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tcpdump -i eth0 icmp # Filter for ICMP traffic
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tcpdump -i eth0 -w capture.pcap # Write to file
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tcpdump -r capture.pcap # Read from file
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# Test unicast bandwidth
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iperf3 -s # Setup server on host 10.1.1.2
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iperf3 -c 10.1.1.2 # Check TCP downlink from 10.1.1.2
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iperf3 -c 10.1.1.2 -u # Check UDP downlink from 10.1.1.2
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# Test multicast connectivity (with iperf)
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iperf -s -u -B 224.0.67.67 -i 1 # Setup multicast receiver
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iperf -c 224.0.67.67 -u --ttl 5 -t 10 -b 1M # Send for 10 seconds at 1 MBit/s
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# Test multicast connectivity (with socat)
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seq 50 | xargs -Iz echo "Hello World" | pv -qL 2 | socat -u - UDP4-DATAGRAM:239.255.10.10:5000,ip-multicast-ttl=1 # Sender
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socat -u UDP4-RECV:5000,ip-add-membership=239.255.10.10:0.0.0.0 - # Receiver
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```
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