smb@ulysses.att.com (06/27/90)
| From: pearmana@prl.philips.co.uk | Subject: Moving to Unix system | | 1) Is there a limit, either with device files or the kernel, on the number | of remote logins permitted across ethernet ? We are thinking of using | TCP/IP terminal servers instead of RS232 cabling. If so is there a work | around ? (this would have to be something like just making more device | files as we will not have a source license) We will be using vt100's, | pc's, etc (NOT X-terminals). From a quick glance at the 4.0 source, you're limited to ~64 remote users. The telnet and rlogin daemons only look for 64 ptys. That's a piece of bad code inherited, I believe, from Berkeley -- the right way to have done it would be to have a subroutine that did all that, so you could fix it in one place. But that would have been too simple...
kevin@corp.sun.com (Kevin Sheehan {Consulting Poster Child}) (06/28/90)
In article <9333@brazos.Rice.edu> smb@ulysses.att.com writes: >X-Sun-Spots-Digest: Volume 9, Issue 231, message 10 > >| From: pearmana@prl.philips.co.uk >| Subject: Moving to Unix system >| >| 1) Is there a limit, either with device files or the kernel, on the number >| of remote logins permitted across ethernet? > >From a quick glance at the 4.0 source, you're limited to ~64 remote users. >The telnet and rlogin daemons only look for 64 ptys. This limit is 256 in SunOS 4.1, as /dev/ptyp[pqrstuvwxyzPQRST][0-f] is the search list. Since these are now clone devices, the only (soon to change) limitation is the minor device number as far as the future is concerned. Kevin Sheehan Sun Microsystems kevin@sun.com