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  • Spam mail through SMTP and user spoofing

    - by Josten Moore
    I have noticed that it's possible to telnet into a mailserver that I own and send spoofed messages to other clients. This only works for the domain that the mail server is regarding; I cannot do it for other domains. For example; lets say that I own example.com. If I telnet example.com 25 I can successfully send a message to another user without authentication: HELO local MAIL FROM: [email protected] RCPT TO: [email protected] DATA SUBJECT: Whatever this is spam Spam spam spam . I consider this a big problem; how do I secure this?

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  • How do I troubleshoot a server I can't get logged into?

    - by Karl
    This morning I am unable to log into SQL Server because it appears to be busy doing something, so much so that CPU usage is constantly at 98%-99%. I am guessing that something has gone wrong with the maintenance plan that ran over the weekend, but I can't get into the error logs see what is happening. On logging in I keep getting messages like "insufficiently memory in the buffer pool" and "the server is not responding". Is there any way I can figure out what is happening without logging onto to the server? Or some way I can squeeze in a login?

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  • monitoring TCP/IP performance on Solaris

    - by Andy Faibishenko
    I am trying to tune a high message traffic system running on Solaris. The architecture is a large number (600) of clients which connect via TCP to a big Solaris server and then send/receive relatively small messages (.5 to 1K payload) at high rates. The goal is to minimize the latency of each message processed. I suspect that the TCP stack of the server is getting overwhelmed by all the traffic. What are some commands/metrics that I can use to confirm this, and in case this is true, what is the best way to alleviate this bottleneck?

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  • Disable Thunderbird "failed to connect" notifications

    - by The Electric Muffin
    My network manager doesn't start until I log in, so for the first ten seconds or so after I login I have no Internet connection. The problem is that I have Thunderbird set to automatically start on login, so it helpfully tells me it "failed to connect" every time I log in. Also, my Internet connection isn't too reliable, so I sometimes get those messages even when I'm supposedly connected. Is there any way to disable these notifications, while still allowing the ones about new mail? Computer info: Thunderbird 15.0 $ uname -a Linux [HOSTNAME REDACTED] 3.2.0-29-generic #46-Ubuntu SMP Fri Jul 27 17:03:23 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux Probably irrelevant: NetworkManager Version 0.9.0.1 (nm09 20120407) KDE Platform Version 4.8.4 (4.8.4)

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  • Logs being flooded from Squid for having intercepted and authentication enabled together

    - by Horace
    I have done some hefty Google'ing and I can't seem to find a single solution to this issue that I cam currently experiencing. Here is a sample configuration from squid that I have: # # DIGEST Auth # auth_param digest program /usr/sbin/digest_file_auth /etc/squid/digpass auth_param digest children 8 auth_param digest realm LHPROJECTS.LAN Network Proxy auth_param digest nonce_garbage_interval 10 minutes auth_param digest nonce_max_duration 45 minutes auth_param digest nonce_max_count 100 auth_param digest nonce_strictness on # Squid normally listens to port 3128 # Squid normally listens to port 3128 http_port 192.168.10.2:3128 transparent https_port 192.168.10.2:3128 intercept http_port 192.168.10.2:3130 As noted above, I have three ports defined, 2 of them are transparent/intercept and one is a regular http port (which I use for authentication). Which works rather well in this configuration however my logs are getting flooded of this entry authentication not applicable on intercepted requests whenever a transparent connection is made. So far, I can't seem to find any documentation that would describe how to suppress these messages ?

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  • Is it possible to change the postfix message-id?

    - by Marcus
    Is it possible to change the message-id in postfix? If I send Mails over an Java-Application I get the following message-id: message-id=<143303043.111334605578921.JavaMail.applicationanme@hostname> So I want that the message-id looks like this: message-id=<[email protected]> What I can understand, if I send mails with the Linux program mail it works: message-id=<[email protected]> I have already set my hostname in the postfix-conf, but when I send a mail with the java-application it doen't work. We use a relay host to send email and any messages which are sent without @domain.tld in the mail-id will detected as a spam mail. Do you have any idea how I can fix this?

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  • Win XP Pro, IIS 5.1, PCI Compliance

    - by Mudman266
    I have a client that was scanned and determined not to be PCI Compliant. I looked and they had IIS setup to allow a program from central office to push/pull info from their server. Many of the reasons they failed appeared to have been fixed in SPs (they were on SP2) or security updates. I fully patched the server to (Windows XP Pro) SP3 with all optional updates. I had them scan again and again they failed with only one less vulnerability that I manually corrected (server was showing debugging/error messages). The main issue I'm having is that when I research the CVE code for each error, they say they are fixed in SP2 and up. I'm wondering if I need to remove IIS and resetup since I have patched to SP3. Any ideas?

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  • DNS propagation

    - by Paddington
    I have 1 primary DNS server (ns1.mydomain.com) running on Fedora and 2 secondary ones (ns2 and ns3). DNS changes made on my web servers first goes to the primary name server and then propagates to the secondary servers. After making a DNS change on a domain on the web server, I can't see the new dns information on my ns1 when I perform: dig @ns1 A blahblah.com I then went to the master records on the names server (uses named) in the directory /var/named/run-root/var/named/masters and I see the A record has been updated appropriately. Tailing the logs /var/log/messages is not showing any errors. What could be the issue?

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  • Ubuntu PPTP VPN to Microsoft Server Command Line ONLY

    - by supreme
    I try to setup a VPN Connection from a Ubuntu 12.04 LTS to Microsoft VPN Server (Ubuntu is the Client in this Case), but I only get this error message: .. connection failed! Check the log messages below for information why. Couldn't open the /dev/ppp device: Operation not permitted FATAL: Module ppp_generic not found./usr/sbin/pppd: Sorry - this system lacks PPP kernel support Details you may need: modprobe -v ppp > FATAL: Module ppp not found. uname -r -> 2.6.32-042stab076.8

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  • How to execute a command on multiple hosts using IPv6 only?

    - by math
    First of all there is pdsh which is essentially a parallel distributed shell which may execute commands on a list of given hosts. However, I find myself in an IPv6 only problem setting. It seems that pdsh is not able to use IPv6, as I am getting error messages: pdsh -w ^hostnames my_command pdsh@myhost: gethostbyname("foobar") failed I also tried to use IPv6 addresses only, which also didn't work. So how do you run a single shell script for administrative purpose (no SGE stuff, or similar) on a bunch of hosts that is IPv6 reachable only?

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  • Server responses "bus error" to every command

    - by Temnovit
    I have a linux machine dedicated to MySQL server with a pretty high load. Today I woke up and was terrified to see, that database server is down. I could connect to it via SSH, but it was responding with bus error to each and every command. [root@r1304 home]# ls Bus error [root@r1304 home]# tail /var/log/messages Bus error [root@r1304 home]# reboot Bus error [root@r1304 home]# free -m Bus error [root@r1304 home]# chkdisk Bus error I went to Data Center and did a hard reset, which seemed to help, but after a half an hour situation reapeated and now I can't even connet via SSH anymore. Any ideas what this could be? how to diagnose such a problem and what are possible fixes? Server has 32 GB RAM, 2xSSD drives with software RAID UPDATE According to Zabbix, when MySQL died, number of processes stated to increase drammaticaly, until I did a hard reset. What could those be? Number of processes

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  • spam email forwarding by server

    - by kikio
    Let's start with this scenario: We have a mailbox (i.e. in yahoo), every message is sent by this account, marked as spam by Gmail spam filter. (because the address or sender IP is blacklisted, not because of content) There is a server which is able to forward incoming messages to another address (email forwarding), for example, to a Gmail mailbox. And it is not blacklisted. The question is: If we send a message, through the dirty mailbox to the server, and server forward it to a Gmail mailbox, will it marked as spam by spam filters?

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  • Access RAID configuration in x3550M2

    - by Mike B
    I'm trying to configure RAID in a IBM x3550 M2 server. I can't find any messages on boot about any hotkey to access the configuration utility. I wasn't able either in BIOS. The card is a on board LSI 1068e. I can't find the original CD's shipped with the server, but I downloaded Server Guide 9.21 from IBM web. Booted with that, and only getting stuck at "Windows loading"p. Tried with a 8.? version from a x3550 (M1), but it was less useful. Although I do not consider myself an expert, I'm starting to feel like a newbie luser. Any help?

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  • Delivery Status Notification (Relay) in Exchange Server 2007 with original email attachment

    - by Nick Kavadias
    I have recently setup Exhchange Server 2007. The server is smarthosting outgoing messages. Users have 'request delivery receipt' on by default their 'auditing' purposes in Outlook. They would like the original email attached to the delivery notification as was the case in Exchange Server 2003. I need this same functionality in 2007. The question has been asked here, here and here but cannot find a valid solution. Here's some information about the functionality in Exchange 2003. The question is, can i replication this functionality in 2007? Here is what a 2007 delivery message looks like: I know it's possible to customize DSN's. Can I make a custom DSN for this type of message and have the original included as an attachment? Anyone got any other ideas?

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  • What is the right iptables rule to allow apt-get to download programs?

    - by anthony01
    When I type something like sudo apt-get install firefox, everything work until it asks me: After this operation, 77 MB of additional disk space will be used. Do you want to continue [Y/n]? Y Then error messages are displayed: Failed to fetch: <URL> My iptables rules are as follows: -P INPUT DROP -P OUTPUT DROP -P FORWARD DROP -A INPUT -i lo -j ACCEPT -A OUTPUT -o lo -j ACCEPT -A INPUT -p tcp --dport 80 -m state --state NEW,ESTABLISHED -j ACCEPT -A OUTPUT -p tcp --sport 80 -m state --state ESTABLISHED -j ACCEPT What should I add to allow apt-get to download updates? Thanks

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  • Does my dd-wrt installation support firewall logging?

    - by SpikeX
    I would like to log firewall events. I know this is possible with dd-wrt, but a lot of the documentation I've read states that this isn't possible with a micro installation of dd-wrt (based on BusyBox). I have a Netgear WNDR3700v2 router, and it does have BusyBox installed on it, but I don't know if the dd-wrt build is a micro build or not. How can I find this out, or how can I find out if my router supports firewall logging or not? Currently, if I enable all firewall logging (setting everything to "Enabled" and/or "High" gives me back blank firewall logs - but syslogd is working because I can view other system log messages).

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  • Cannot install wireless lan service on windows 2012 RTM offline

    - by user1763118
    I'm having trouble installing the wireless lan service offline with a fresh installed windows 2012 server RTM. I tried "install-windowsfeature wireless-networking" in the non-gui mode and using the server manager in the gui mode to enable the wireless lan service, but both of them show a "failure configuring windows updates" message after the installation restarted the system. I checked the event log and I think messages about "The WLAN Autoconfig service depends on the following service: nativewifip. This service might not be installed" are the source of the issue. Google shows it is a service called "native wifi filter", but I cannot find anywhere to install that service. I don't have a Ethernet adapter for that computer, so have to install everything offline before the wifi's working.

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  • Installing the Apple Root Certificate Authority on CentOS CLI

    - by Daniel Hollands
    I could be barking up the wrong tree here, but I'm looking for help on installing Apple's Root certificate (http://www.apple.com/certificateauthority/) on a CentOS server via the command line - which I need to send messages to their APNS system. The code I'm using for this purpose is a variation on this: https://github.com/jPaolantonio/SimplePush/blob/master/simplepush.php - which works perfectly well on a Windows server, but as soon as we try to use it on a CentOS one, it falls over. We're lead to believe this has something to do with not having the CA installed on our CentOS box - but all efforts to do so have failed. As the CentOS server is headless, we need the ability to do this via the commandline. Can someone help?

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  • Printer stops printing at page 138, every time.

    - by ghostz00
    I'm printing invoices from quickbooks premier 2009 and I have around 300 to print. But the job always fails at 138. It doesn't give any error messages, the print dialog box just disappears. and quickbooks acts like nothing was printed. The printer is a lexmark color laser c544n on windows xp sp3. It's pretty new. I've tried reinstalling the driver as well as change the way it spools (sending it directly to the printer). But nothing seems to work.

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  • View changelog of all packages to be upgraded before upgrading

    - by Stein G. Strindhaug
    When using synaptic on my Ubuntu desktop computer i can review all changelog of all the packages to be upgraded, and unselect a package for upgrade if I want. On my desktop I usually install everything, but I like to at least review what the changes are so that I can delay the upgrade if I suspect it could cause problems with the development tools I use. On a server (Ubuntu Server) with no x-server how can I do the same thing on the console: list all packages that will be updated (apt-get --dry-run upgrade does this along with a lot of noisy simulated install messages), view the changelog (if any) from last upgrade to the version it will be upgraded to. select which packages I want to ignore, or which I want to upgrade I've searched a lot for this but I haven't found anything, possibly I'm not using the correct terminology; but surely this must be possible. Synaptic must get it's info from some some low-level tool I assume? Complicated shellscripts are welcome too, if this is not already easily done with the existing tools.

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  • svnrepo + trac hosting

    - by Shikhar
    Does anyone know of a good and economic svn + trac hosting site. Specific requirements 1) trac hooks should be in place, which enables commmit messages to be updated in trac issues. 2) It should have emailTotracScript or MailToTracPlugin installed, with which an issue can be reported via email. If its located in Asia pacific it would be great, as time delay from the US is very high. I am already using sourcerepo.com and its very good. Only short coming is they dont have emailtotrac and the time delay is significant. any other inputs would be helpful. TIA

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  • Constantly visible notification and access icon for Empathy in Gnome 3

    - by aef
    Since a short while I'm using Ubuntu Oneiric Ocelot (11.10) with gnome-shell (Gnome 3) and I'm trying to get accustomed to the default Empathy Instant Messaging client. One mayor problem for me (coming from Gnome 2 and Psi) is that there is no constantly visible icon which makes it clear (for example by changing its icon or showing an animation) if there are incoming messages which I did not read already and which lets me jump into them with one click. Also I'm missing a way to bring up the contact list or hide it away with a click. I sometimes have real problems even figuring out how to even open the contact list up again. Is there a Gnome 3 extension or some other trick available to display such a notifier in the top bar? I'm talking about something just like the sound and network controls which are already located there. I know that there are notifications in the lower notification area (former system tray), but as it is only visible as I move the mouse in the lower right corner of the screen, its useless for me.

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  • How do I find files containing two strings together in Linux?

    - by alwbtc
    I have a file containing a text: PADLST20120907:D:05B:UN:IBTA+TK4 17 JFL01+01'BGM+250+C'RFF+TN:TK4 I want to find this file in Linux, using these two strings: "JFL" and "20120907". As you see above, the file contains both "JFL" and "20120907". What should I write in command line? Stirngs may or may not be in the same line. I want to see file names with full path in the output. I don't want to see error messages or permission denied warnings. I want to search recursively in the directory I am standing in or I would like to specifiy a path. regards

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  • NTP configuration not recognized?

    - by Eugene S
    I'm trying to configure NTP on my machine but it seems that the parameters I set are not being read by the system. Below is my /etc/ntp.conf file. (I applied the most basic configuration to eliminate other issues) server 10.45.68.47 server 127.0.0.1 After I set the above configuration, I restart the ntpd process by doing the following: service ntpd restart And then I get the following output: Shutting down ntpd: [ OK ] ntpd: Synchronizing with time server: [FAILED] Starting ntpd: [ OK ] Moreover, I can see the following in /var/etc/messages: Apr 2 10:54:07 hsystem1a ntpd[21067]: ntpd exiting on signal 15 Apr 2 10:54:07 hsystem1a ntpdate[21537]: can't find host ntpServer1 Apr 2 10:54:07 hsystem1a ntpdate[21537]: can't find host ntpServer2 Apr 2 10:54:07 hsystem1a ntpdate[21537]: no servers can be used, exiting So it seems that the ntpServer1 and the ntpServer2 are being read from somewhere instead of the IPs I configured in /etc/ntp.conf. NOTE: I done init 6 on the machine just in case. Thanks!

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  • Is Exchange protected from/allow back dated emails?

    - by David
    Does Exchange Server adequately protect against backdating items in a mailbox folder? I want to determine from an auditing perspective what level of risk exists/what trust can be put into Exchange database records. Is there a (mis)feature that allows end point users to modify the sent/recieved date fields on their own messages? Is there a reasonable way short of hand editing the files for an Exchange Server admin to make such a change? And most importantly: Is there any kind of "sequence number" that we could use to audit Exchange records for evidence of date manipulation (ex. msg100 = Dec 15, msg101 = Dec 10, msg102 = Dec 16)

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