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1 | .TH SAFE_FINGER 8 "21th June 1997" Linux "Linux Programmer's Manual" | ||
2 | .SH NAME | ||
3 | safe_finger \- finger client wrapper that protects against nasty stuff | ||
4 | from finger servers | ||
5 | .SH SYNOPSIS | ||
6 | .B safe_finger [finger_options] | ||
7 | .SH DESCRIPTION | ||
8 | The | ||
9 | .B safe_finger | ||
10 | command protects against nasty stuff from finger servers. Use this | ||
11 | program for automatic reverse finger probes from the | ||
12 | .B tcp_wrapper | ||
13 | .B (tcpd) | ||
14 | , not the raw finger command. The | ||
15 | .B safe_finger | ||
16 | command makes sure that the finger client is not run with root | ||
17 | privileges. It also runs the finger client with a defined PATH | ||
18 | environment. | ||
19 | .B safe_finger | ||
20 | will also protect you from problems caused by the output of some | ||
21 | finger servers. The problem: some programs may react to stuff in | ||
22 | the first column. Other programs may get upset by thrash anywhere | ||
23 | on a line. File systems may fill up as the finger server keeps | ||
24 | sending data. Text editors may bomb out on extremely long lines. | ||
25 | The finger server may take forever because it is somehow wedged. | ||
26 | .B safe_finger | ||
27 | takes care of all this badness. | ||
28 | .SH SEE ALSO | ||
29 | .BR hosts_access (5), | ||
30 | .BR hosts_options (5), | ||
31 | .BR tcpd (8) | ||
32 | .SH AUTHOR | ||
33 | Wietse Venema, Eindhoven University of Technology, The Netherlands. | ||
34 | |||