06-16-2017
The second looks like an IPv6 address, but I'm surprised the protocol listed is tcp and not tcp6
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/* Linux Slackware */
Nmap shows the following ports open on the gateway.
21/tcp ftp
22/tcp ssh
23/tcp telnet
25/tcp smtp
37/tcp time
80/tcp http
113/tcp auth
515/tcp printer
587/tcp submission
1024/tcp kdm
6000/tcp x11
-------------------------------
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hi all
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just a quick question:
a. whats the simplest command to check open port and the corresponding services?
example:
bash-2.05# netstat -an | grep LISTEN
*.199 *.* 0 0 49152 0 LISTEN
*.8989 *.* 0 0 49152 ... (1 Reply)
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LEARN ABOUT OSF1
services
services(4) Kernel Interfaces Manual services(4)
NAME
services - Defines the sockets and protocols used for Internet services
SYNOPSIS
/etc/services
DESCRIPTION
The /etc/services file associates Internet service names and aliases with the port number and protocol used by the service. Each service
is listed in this file on a single line of the form: ServiceName PortNumber/ProtocolName Aliases
The fields contain the following information: The official Internet service name. The socket port number used for the service and the
transport protocol used for the service. A list of unofficial service names.
Items on a line are separated by spaces or tabs. Comments begin with a # (number sign) and continue to the end of the line.
EXAMPLES
Entries in the /etc/services file for the inetd internal services might look like this: echo 7/tcp echo 7/udp discard
9/tcp sink null discard 9/udp sink null daytime 13/tcp daytime 13/udp chargen 19/tcp ttytst source
chargen 19/tcp ttytst source ftp 21/tcp time 37/tcp timeserver time 37/udp timeserver
RELATED INFORMATION
Functions: endservent(3), getservbyname(3), getservbyport(3), getservent(3), setservent(3)
The RFC923 specification. delim off
services(4)