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VPN access
See How to Connect to SLAC VPN
Note you will need to request VPN Usage access.
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Unix/NFS group iepm
File used to keep track of network group privs. It use the ypgroup Unix databases
To see who is in a group use the command*
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netgroup <group_name>, e.g.
36cottrell@pinger:~>netgroup u-network-management
u-network-management
(-,antony,)
(-,cal,)
(-,cottrell,)
(-,cxg,)
(-,jerrodw,)
(-,kmartell,)
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or
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ypmatch <group_name> group
ypmatch <group_name> netgroup, e.g.
35cottrell@pinger:~>ypmatch u-network-management netgroup
(-,antony,) (-,cal,) (-,cottrell,) (-,cxg,) (-,jerrodw,) (-,kmartell,)
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or
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ypgroup exam -group iepm
Group 'iepm':
GID: 2087
Comment:
Last modified at Aug 2 15:20:42 2006 by jonl
Owners: cal
Members: akbar, cal, cottrell, cxg, fawad, hasan, iepm,
jerrodw, jiri, maheshkc, rich, ytl
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To add someone to a group use (Jerrod and Les can execute this command):
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ypgroup adduser -group iepm -user pinger
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# Please keep unix-admin & security notified when changes are needed, e.g. people changing function or moving etc.
#Note that people with privileges need to change their passwords at least every 9 months.
To see which hosts use a netgroup
grep the files at /afs/slac.stanford.edu/g/scs/systems/system.info/<machine>/taylor.opts.expanded looking for the group, e.g.
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6cottrell@pinger:/afs/slac/g/scs/systems/system.info>grep u-iepm /afs/slac/g/scs/systems/system.info/i*/taylor.opts.expanded
/afs/slac/g/scs/systems/system.info/iepm-bw/taylor.opts.expanded:limit_login=u-iepm
/afs/slac/g/scs/systems/system.info/iepm-resp/taylor.opts.expanded:limit_login=u-iepm
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N.b. replacing i* with * will probably result in /bin/grep: Argument list too long. Also note that as of 12/31/06 the hosts whose access is controlled by u-iepm are: iepm-bw, iepm-resp, monalisa, nettest5, and pinger
Unix/AFS groups
Purpose | afs path | contact(s) |
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SVN access | /afs/slac/g/scs/net/netmon/repo/svn | Cottrell |
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To see the names of groups and privileges on a particular directory, issue the command
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fs la <directory>, e.g.
fs la .
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or
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fs la /afs/slac/g/scs/net/pinger
jerrodw@pinger $ fs la /afs/slac/g/scs/net/pinger/
Access list for /afs/slac/g/scs/net/pinger/ is
Normal rights:
maint-pkg-netmon rlidwk
g-scs rlidwka
system:slac rl
system:administrators rlidwka
system:authuser rl
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To view members of a particular group listed from 'fs la', issue the command:
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pts mem <group_name>, e.g.
jerrodw@pinger $ pts mem maint-pkg-netmon
Members of maint-pkg-netmon (id: \-4786) are:
<list of user_id's belonging to this group>
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To add users to a particular group (only if you have privileges of course), issue the command
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pts adduser \-group <group_name> \-user <user_id>
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Network Test hosts
Please note that we would like to see network testing, especially WAN testing, done primarily and by convention from machines set aside for that purpose
(e.g. iepm-bw, iepm-resp, pinger), the list of network machines is kept at http://www-iepm.slac.stanford.edu/about/nodes.html
To find out who can logon to a specified host look at the /etc/passwd file on that host, look towards the end for things like
+@u-iepm
and use the netgroup u-iepm command to see who is in the group.
To find out what hosts u-iepm can logon to use:
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#65cottrell@pinger:/afs/slac/g/scs/systems/system.info>grep u-iepm \*/passwd
#bping/passwd:+@u-iepm
#iepm-bw/passwd:+@u-iepm
#iepm-resp/passwd:+@u-iepm
#iepm-sol/passwd:+@u-iepm
#monalisa/passwd:+@u-iepm
#...
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Sudo
The sudoers file can be found at:
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/afs/slac/package/taylor/prod/base/sudoers
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The following lines are in the sudoers file:
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# NB: The following two aliases define collections of commands for use
# by members of the IEPM group on all machines and on the network
# trouble-shooting machine, pharlap, respectively. In this context,
# "IEPM group" is not necessarily the same as the NIS group named
# "iepm"; changes to the commands in the two aliases, or to the users
# who should be authorized to use the commands, still need the usual
# approvals.
# Commands authorized for members of the IEPM group on all machines:
Cmnd_Alias IEPM_ALL = NIKHEF_PING,PATHCHAR,PCHAR,PIPECHAR
# Commands authorized for members of the IEPM group on pharlap:
# The addition of PIPECHAR to this list of commands is granted for
# six months only and should be revisted May 28, 2002.
Cmnd_Alias IEPM_PHARLAP = SNOOP,TCPDUMP,NDD,PIPECHAR,KILL
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The people in the sudoers file with privileges assigned by these two Cmnd_Alias-es are: cal, cottrell, cxg.
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iepm group: cottrell, warrenm, cal, dougc, cxg, grosso
Pathchar All sudo /afs/slac/g/scs/bin/pathchar
Pchar All sudo /afs/slac/package/netperf/bin/@sys/pchar
Pipechar All sudo /afs/slac.stanford.edu/package/netperf/bin/@sys/pipechar
NIKHEF ping All sudo /afs/slac/package/nikhef/@sys/ping
#Snoop and tcpdump are big security exposures, so please be careful with their use.
#Probably a good idea to notify security (email just before you start) if you are
#going to use snoop and/or tcpdump
Snoop Pharlap sudo snoop
Tcpdump Pharlap sudo /afs/slac/package/netperf/bin/@sys/tcpdump
u-network-management: warrenm, cottrell, kmartell, cal, cxg, grosso, janewei, gtb
ssh All
maint-pkg-nikhef: cxg, warrenm, dougc
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The following have /usr/sbin/ndd -set privs and sudo kill (via cmd macro IEPM_PHARLAP) on pharlap (7/19/01):
cal, cottrell, cxg
Account iepm has sudo kill with no password on pharlap (12/14/01)
cottrell also has ndd -set for evagore (11/21/01)
iepm has pipechar with no password on pharlap and antonia (11/28/01)
Mailing lists
The main mailing list is iepm-group. To get added to this list contact Les Cottrell. To see who is in the group etc. go to majordomo