TCP IP Illustrated

Tucnoaoedu mail forwarded to rstevensnoaoedu no plan

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: nd Login Office Name Office Login Tty Idle Time Phone Richard Jul 31 rstevens *co 45 Stevens 09:13 Richard Aug 5 rstevens *c2 45 Stevens 09:41 Connection closed by foreign output by Telnet client host. The blank output fields for the office and office phone are taken from optional fields in the user's password file entry (which aren't present in this example). The server must be the end that does the active close, since a variable amount of information is returned by the server, and the reception of the end-of-file by the client is how the client knows when the output is complete. When the client request consists of a usemame, the server responds with information only about that user. Here's another example, with the Telnet client output removed: sun % telnet vangogh.cs.berkeley.edu finger this is the client request we type rstevens Name: Richard Stevens Login: rstevens Directory: /a/guest/rstevens Shell: /bin/csh Last login Thu Aug 5 09:55 (PDT) on ttyq2 from sun.tuc.noao.edu Mail forwarded to: rstevens@noao.edu No Plan. When a system has the Finger service completely disabled, the client's active open will receive an RST from the server, since no process has a passive open on port 79: sun % finger @svr4 [svr4.tuc.noao.edu] connect: Connection refused Some sites provide a server on port 79, but it just outputs information to the client, and doesn't honor any client requests: sun % finger @att.com file:///D|/Documents%20and%20Settings/bigini/Documenti/homenet2run/tcpip/tcp-ip-illustrated/other.htm (2 of 11) [12/09/2001 14.47.58] Chapter 30. Other TCP/IP Applications this line output by Finger client; remainder from server --------------------------------------------------------------------------------There are no user accounts on the AT&T Internet gateway, To send email to an AT&T employee, send email to their name separated by periods at att.com. If the employee has an email address registered in the employee database, they will receive email - otherwise, you'll receive a non-delivery notice. For example: John.Q.Public@att.com sun % finger clinton@whitehouse.gov [whi...
View Full Document

Ask a homework question - tutors are online