Network Utils - Revision history

Piousbox: /* how to tell if port 80 is listening? What is listening on a particular port? */

2024-04-06T00:46:43Z

‎how to tell if port 80 is listening? What is listening on a particular port?

2024-04-06T00:46:22Z

2024-04-04T22:01:18Z

2023-12-28T19:25:08Z

‎how to tell if port 80 is listening? What is listening on a particular port?

2022-03-05T23:18:22Z

‎how to tell if port 80 is listening? What is listening on a particular port?

2018-08-30T18:13:03Z

‎Other

2018-08-03T01:44:25Z

2018-08-03T01:42:53Z

‎how to tell if port 80 is listening? What is listening on a particular port?

2018-08-03T01:39:58Z

2018-08-03T01:39:50Z

@@ Line 33: / Line 33: @@
 === how to tell if port 80 is listening? What is listening on a particular port? ===
- netstat -plnt
+  netstat -plnt
- netstat -tunlp
+  netstat -tunlp
- lsof -nP -i4TCP:$PORT | grep LISTEN
+  lsof -nP -i4TCP:$PORT | grep LISTEN
- lsof -i:1433
+  lsof -i:1433
-−
-−
- netstat -an -ptcp | grep LISTEN
 === Port Forward ===

@@ Line 1: / Line 1: @@
 === Count the number of connections ===
 netstat -ant | awk '{print $6}' | sort | uniq -c | sort -n
 === verify connectivity ===
-* nslookup myexampledb.xxxx.us-east-1.rds.amazonaws.com
+  nslookup myexampledb.xxxx.us-east-1.rds.amazonaws.com
-* telnet <RDS endpoint> <port number>
+  telnet <RDS endpoint> <port number>
-−
 === network traffic by-process ===

@@ Line 1: / Line 1: @@
 === network traffic by-process ===
@@ Line 43: / Line 51: @@
   ngrep port 3000
   ngrep -d any -W byline port 5000

@@ Line 10: / Line 10: @@
 === how to tell if port 80 is listening? What is listening on a particular port? ===
   netstat -plnt
   lsof -nP -i4TCP:$PORT | grep LISTEN
   lsof -i:1433

@@ Line 13: / Line 13: @@
   lsof -nP -i4TCP:$PORT | grep LISTEN
   lsof -i:1433
 === Port Forward ===

@@ Line 14: / Line 14: @@
   lsof -i:1433
-=== Other ===
+=== Port Forward ===
-Port Forward
   ncat --sh-exec "ncat 10.0.1.117 22" -l 2289
   ssh -L 8080:127.0.0.1:8080 -L 8081:127.0.0.1:8081 developer@133.111.111.111
-What's running on my ports?
+=== What's running on my ports? ===
   sudo netstat -ltnp
   netstat -anp | grep :443 | grep LISTEN
-Rename a wireless interface
+or
   ip link set wlp5s0 name wlan0

← Older revision		Revision as of 01:44, 3 August 2018
Line 13:		Line 13:
	lsof -nP -i4TCP:$PORT \| grep LISTEN		lsof -nP -i4TCP:$PORT \| grep LISTEN
	lsof -i:1433		lsof -i:1433
		+
		+	=== Other ===
		+	Port Forward
		+	ncat --sh-exec "ncat 10.0.1.117 22" -l 2289
		+	ssh -L 8080:127.0.0.1:8080 -L 8081:127.0.0.1:8081 developer@133.111.111.111
		+
		+	What's running on my ports?
		+	sudo netstat -ltnp
		+	netstat -anp \| grep :443 \| grep LISTEN
		+
		+	Rename a wireless interface
		+	ip link set wlp5s0 name wlan0
		+
		+	=== Security ===
		+
		+	List nodes in the network:
		+	sudo arp-scan -l --interface=wlan0
		+
		+	This is better than wireshark and tcpdump:
		+	ngrep port 3000
		+	ngrep -d any -W byline port 5000

@@ Line 1: / Line 1: @@
 == Network Utils ==
 === network traffic by-process ===
   sudo tcpdump -k NP | grep Sublime
 === check that a node is pingable in bash ===
   while ! ping -c1 bjjc_spec_22.ubuntu14 &>/dev/null; do :; done ;
-=== how to tell if port 80 is listening? ===
- telnet? nmap, netstat
 === how do I know if the system trusts the certificate? ===
- you use curl.
+you use curl
 === how to tell if port 80 is listening? What is listening on a particular port? ===
   netstat -plnt
   lsof -nP -i4TCP:$PORT | grep LISTEN