Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

How do I enable rhost (ie. the remote IP) to be recorded in the log entry in /var/log/secure?

Posted on 2010-09-21
7
Medium Priority
?
1,132 Views
Last Modified: 2012-05-10
Server: Centos 5.5

Failed login attempts are currently logged in /var/log/secure, but the related ip address is not logged in this log entry.  How do we add the ip address to also be logged (just like it is for ssh log entries).  Here is an example of what is currently being logged:

/var/log/secure
Sep 20 19:27:30 firstkings dsm_om_connsvcd: pam_unix(omauth:auth): check pass; user unknown
Sep 20 19:27:30 firstkings dsm_om_connsvcd: pam_unix(omauth:auth): authentication failure; logname= uid=0 euid=0 tty= ruser= rhost=
Sep 20 19:27:30 firstkings dsm_om_connsvcd: pam_succeed_if(omauth:auth): error retrieving information about user afdafsdfa
Sep 20 19:29:48 firstkings sshd[24793]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=98.225.96.217  user=root
Sep 20 19:29:50 firstkings sshd[24793]: Failed password for root from 98.225.96.217 port 33789 ssh2
Sep 20 19:20:07 firstkings dsm_om_connsvcd: pam_unix(omauth:auth): check pass; user unknown
Sep 20 19:20:07 firstkings dsm_om_connsvcd: pam_unix(omauth:auth): authentication failure; logname= uid=0 euid=0 tty= ruser= rhost=
Sep 20 19:20:07 firstkings dsm_om_connsvcd: pam_succeed_if(omauth:auth): error retrieving information about user dffd
Sep 20 19:20:19 firstkings dsm_om_connsvcd: pam_unix(omauth:auth): check pass; user unknown
Sep 20 19:20:19 firstkings dsm_om_connsvcd: pam_unix(omauth:auth): authentication failure; logname= uid=0 euid=0 tty= ruser= rhost=
Sep 20 19:20:19 firstkings dsm_om_connsvcd: pam_succeed_if(omauth:auth): error retrieving information about user alsdfjldfja
0
Comment
Question by:iRapture
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 5
  • 2
7 Comments
 
LVL 27

Expert Comment

by:Nopius
ID: 33779016
It seems there is way to enable  it in /var/log/secure, because it doesn't provide remote IP to the pam module. Also it seems it doesn't use tcp wrappers (were you can log every attempt in /etc/hosts.allow and /etc/hosts.deny).
What you can do is enable iptables logging, like:

iptables -I INPUT -p tcp -m tcp -m state --state NEW --dport 443 -j LOG --log-level 3 --log-tcp-options

the result in /var/log/messages will look as:

Sep 28 06:58:20 www kernel: IN=eth0 OUT= MAC=00:02:b3:bf:fd:79:00:d0:02:XX:38:0a:XX:00 SRC=82.X.X.91 DST=216.X.X.226 LEN=52 TOS=0x00 PREC=0x00 TTL=117 ID=9964 DF PROTO=TCP SPT=49540 DPT=443 WINDOW=8192 RES=0x00 SYN URGP=0 OPT (020405B40103030201010402)

0
 

Author Comment

by:iRapture
ID: 33781771
iptables -I VZ_INPUT -p tcp --dport 1311 -j LOG --log-tcp-options --log-prefix "***port1311***"

/var/log/secure:
Sep 28 12:50:18 firstkings dsm_om_connsvcd: pam_unix(omauth:auth): check pass; user unknown
Sep 28 12:50:18 firstkings dsm_om_connsvcd: pam_unix(omauth:auth): authentication failure; logname= uid=0 euid=0 tty= ruser= rhost=
Sep 28 12:50:18 firstkings dsm_om_connsvcd: pam_succeed_if(omauth:auth): error retrieving information about user test
 
/var/log/messages (partial activity from a single connection):
Sep 28 12:50:21 firstkings kernel: ***port1311***IN=bond0 OUT= MAC=84:2b:2b:19:03:be:00:d0:00:42:d4:0a:08:00 SRC=98.225.96.217 DST=209.104.11.10 LEN=40 TOS=0x00 PREC=0x20 TTL=116 ID=14772 DF PROTO=TCP SPT=33791 DPT=1311 WINDOW=16425 RES=0x00 ACK URGP=0
Sep 28 12:50:21 firstkings kernel: ***port1311***IN=bond0 OUT= MAC=84:2b:2b:19:03:be:00:d0:00:42:d4:0a:08:00 SRC=98.225.96.217 DST=209.104.11.10 LEN=40 TOS=0x00 PREC=0x20 TTL=116 ID=14773 DF PROTO=TCP SPT=33791 DPT=1311 WINDOW=16425 RES=0x00 ACK URGP=0

The remote ip is recorded in /var/log/messages but it is not in a log entry that says 'failure'.  The log entry in /var/log/secure says 'failure' but does not include the ip address
0
 
LVL 27

Expert Comment

by:Nopius
ID: 33784334
to restrict log to only one line per connection use -m state --state NEW
to log iptables info to /var/log/secure change your /etc/syslog.conf

authpriv.* /var/log/secure

to

authpriv.*,kernel.info /var/log/secure

restart syslog and add --log-level 6 to iptables rule

then you may grep few lines before 'failure' log entry:

grep -B 2 /var/log/secure failure
0
Introducing the WatchGuard 420 Access Point

WatchGuard's newest access point includes an 802.11ac Wave 2 chipset, providing the fastest speeds for VoIP, video and music streaming, and large data file transfers. Additionally, enjoy the benefits of strong security as the 3rd radio delivers dedicated WIPS protection!

 

Author Comment

by:iRapture
ID: 33784581
After doing this, new entries are not recorded in /var/log/secure if I enter a bad login/password at 209.104.11.10:1311.

Entries are still recorded in /var/log/messages but they don't say that there was an authentication failure:
Sep 28 17:55:37 firstkings kernel: ***port1311***IN=bond0 OUT= MAC=84:2b:2b:19:03:be:00:d0:00:42:d4:0a:08:00 SRC=98.225.96.217 DST=209.104.11.10 LEN=40 TOS=0x00 PREC=0x20 TTL=116 ID=5379 DF PROTO=TCP SPT=33217 DPT=1311 WINDOW=0 RES=0x00 ACK RST URGP=0

0
 

Accepted Solution

by:
iRapture earned 0 total points
ID: 34003809
Solution:

create new log file with cron job that is executed every minute and then parse this log file.
0
 

Author Comment

by:iRapture
ID: 34003818
solved
0
 

Author Closing Comment

by:iRapture
ID: 34031711
solved
0

Featured Post

What Is Blockchain Technology?

Blockchain is a technology that underpins the success of Bitcoin and other digital currencies, but it has uses far beyond finance. Learn how blockchain works and why it is proving disruptive to other areas of IT.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

​Being a Managed Services Provider (MSP) has presented you  with challenges in the past— and by meeting those challenges you’ve reaped the rewards of success.  In 2014, challenges and rewards remain; but as the Internet and business environment evol…
Hello EE, Today we will learn how to send all your network traffic through Tor which is useful to get around censorship and being tracked all together to a certain degree. This article assumes you will be using Linux, have a minimal knowledge of …
If you're a developer or IT admin, you’re probably tasked with managing multiple websites, servers, applications, and levels of security on a daily basis. While this can be extremely time consuming, it can also be frustrating when systems aren't wor…
In this video, Percona Solution Engineer Dimitri Vanoverbeke discusses why you want to use at least three nodes in a database cluster. To discuss how Percona Consulting can help with your design and architecture needs for your database and infras…
Suggested Courses

721 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question