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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I cannot get any hits on “os.getenv” in the source code folder for version tacacs-F4.0.4.28 (which includes the do_auth files) or in any of the other usual
culprits. What file would that line be in?<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Daniel Schmidt [mailto:daniel.schmidt@wyo.gov]
<br>
<b>Sent:</b> Friday, April 24, 2015 4:01 PM<br>
<b>To:</b> Aaron Wasserott<br>
<b>Cc:</b> tac_plus@shrubbery.net<br>
<b>Subject:</b> Re: [tac_plus] IPv6 ACL commands not working with do_auth and IOS-XR<o:p></o:p></span></p>
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<p class="MsoNormal">Can you get me a log of that failure? Set debug to True in the code. <o:p></o:p></p>
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<p class="MsoNormal">271 DEBUG = os.getenv('DEBUG', <b>True</b>)<o:p></o:p></p>
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<p class="MsoNormal">On Fri, Apr 24, 2015 at 3:43 PM, Daniel Schmidt <<a href="mailto:daniel.schmidt@wyo.gov" target="_blank">daniel.schmidt@wyo.gov</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">Hum... certainly doesn't do that on Brocade/Cisco routers/switches. Let me research this a second, Aaron. <o:p></o:p></p>
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<p class="MsoNormal">On Fri, Apr 24, 2015 at 11:51 AM, Aaron Wasserott <<a href="mailto:aaron.wasserott@viawest.com" target="_blank">aaron.wasserott@viawest.com</a>> wrote:<o:p></o:p></p>
<p class="MsoNormal">I have a Cisco ASR 9000 running 4.3.2 and cannot enter some IPv6 ACL commands when do_auth is enabled for that user. Tac_plus version is F4.0.4.28 and do_auth.py is 1.92<br>
Note: In the examples below I am using invalid addresses, but am trying valid addresses in the actual commands.<br>
<br>
Here is the error we see when do_auth is enabled:<br>
<br>
RP/0/RSP0/CPU0:asr-9010-01(config)#ipv6 access-list test permit ipv6 xx90::/16 any<br>
Command authorization failed<br>
% Incomplete command.<br>
<br>
Here is running that same command w/o do_auth enabled:<br>
<br>
RP/0/RSP0/CPU0:asr-9010-01(config)#ipv6 access-list test permit ipv6 xx90::/16 any<br>
RP/0/RSP0/CPU0:asr-9010-01(config)#commit<br>
Thu Apr 23 09:51:35.413 UTC<br>
RP/0/RSP0/CPU0:asr-9010-01(config)#do sh access-lists ipv6 test<br>
Thu Apr 23 09:52:01.073 UTC<br>
ipv6 access-list test<br>
10 permit ipv6 xx90::/16 any<br>
<br>
At first I thought maybe it was just the double-colons that do_auth doesn't like ....<br>
<br>
Here without IPv6 short-hand and with do_auth enabled:<br>
<br>
RP/0/RSP0/CPU0:asr-9010-01(config)#ipv6 access-list test permit ipv6 xx90:0:0:0:0:0:0:0/128 any<br>
Command authorization failed<br>
% Incomplete command.<br>
RP/0/RSP0/CPU0:asr-9010-01(config)#commit<br>
Thu Apr 23 10:01:45.208 UTC<br>
No configuration changes to commit.<br>
<br>
Here without IPv6 short-hand and and do_auth disabled:<br>
<br>
RP/0/RSP0/CPU0:asr-9010-01(config)#ipv6 access-list test permit ipv6 xx90:0:0:0:0:0:0:0/128 any<br>
RP/0/RSP0/CPU0:asr-9010-01(config)#commit<br>
Thu Apr 23 10:02:30.903 UTC<br>
RP/0/RSP0/CPU0:asr-9010-01(config)#do sh access-lists ipv6 test<br>
Thu Apr 23 10:02:33.440 UTC<br>
ipv6 access-list test<br>
10 permit ipv6 host xx90:: any<br>
<br>
But it appears that it doesn't like any colons in authorization commands. If I enter the ACL with "any any" it works. With do_auth enabled I don't get any hits in the do_auth.log for the failing command.<br>
<br>
This is happening in production, but I have setup a simple lab to play with using very minimal settings, and a fresh install of the daemon installed from source.<br>
<br>
tac_plus version:<br>
<br>
sudo /usr/local/sbin/tac_plus -v<br>
tac_plus version F4.0.4.28<br>
ACLS<br>
FIONBIO<br>
LIBWRAP<br>
LINUX<br>
LITTLE_ENDIAN<br>
LOG_DAEMON<br>
NO_PWAGE<br>
REAPCHILD<br>
REAPSIGIGN<br>
RETSIGTYPE RETSIGTYPE<br>
SHADOW_PASSWORDS<br>
SIGTSTP<br>
SIGTTIN<br>
SIGTTOU<br>
SO_REUSEADDR<br>
STRERROR<br>
TAC_PLUS_PORT<br>
UENABLE<br>
__STDC__<br>
<br>
<br>
Here is my tac_plus.conf file:<br>
<br>
key = password<br>
# password should be "password" for user testuser<br>
default authentication = file /etc/passwd<br>
<br>
group = test {<br>
default service = permit<br>
service = exec {<br>
priv-lvl = 15<br>
}<br>
after authorization "/usr/bin/python /usr/local/bin/do_auth.pyc -i $address -u $user -d $name -l /var/log/do_auth.log -f /etc/tacacs/do_auth.ini"<br>
}<br>
<br>
user = testuser {<br>
member = test<br>
}<br>
<br>
<br>
And my do_auth file:<br>
<br>
DEFAULT =<br>
neteng-group<br>
<br>
[neteng-group]<br>
host_allow =<br>
.*<br>
device_deny =<br>
10.99.0.15<br>
device_permit =<br>
.*<br>
command_permit =<br>
.*<br>
<br>
<br>
And here are AAA commands on the router:<br>
<br>
tacacs-server host 10.11.11.10 port 49<br>
key 7 071F205F5D1E161713<br>
!<br>
aaa group server tacacs+ mytacacs<br>
server 10.11.11.10<br>
!<br>
aaa authorization exec default group mytacacs none<br>
aaa authorization commands default group mytacacs none<br>
aaa authentication login default group mytacacs local<br>
<br>
Thanks!<br>
<br>
-Aaron<br>
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Act and may be disclosed to third parties.<o:p></o:p></p>
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