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• Configuring vlans on Cisco SG200 series switch with Ubuntu server

  - by nixnotwin

  I created a vlan on Ubuntu with vconfig tool with 21 as id and eth1 as the host port. I connected eth1 to one of the ports on the swtich (GE23) as all ports trunk by default. In the webgui I created a vlan named test with the id 21 and I made GE2 are port as an access port. In port to vlan mapping I selected vlan 21 and added it port GE2 by selecting untagged option. I have assigned 192.168.1.1/24 as the ip of eth1.21 on Ubuntu. If I connect another cleint pc to GE2 port with a ip of 192.168.1.2/24 I cannot ping the server ip (192.168.1.1/24). Ping from server to client also does not work. I inspected packets that are sent out eth1 on the server and I could see the vlan 21 tag. And I connect the other end of the cable to a different Linux pc and inspected the packets but no vlan tags can be seen. What could be preventing me from getting vlans working? Edit 1 screenshots:

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• Providing access to a Samba server for VPN clients

  - by Kamil Kisiel

  We have some Windows users that connect to our network via VPN from home. They need to be able to connect to our Samba server and access a mapped network drive just as they do as when they are on our LAN. The complication is that VPN clients are placed on a subnet other than our office LAN, and behind a firewall. What's the easiest way for me to allow them to still connect to the network share? The solutions I've currently seen involve setting up a WINS server for name resolution purposes and then tunnelling a bunch of the NetBIOS stuff through the firewall. However that means I'd have to set up the VPN DHCP server to hand out the WINS address, something I'm not even sure is possible on the Cisco hardware we have. I'm thinking there must be an easier way. Should I use an LMHOSTS file? Or just map by IP address? Also, I'm not terribly familiar with Windows networking, so which ports would I need to pass through my firewall in order to get the file sharing through?

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• Cooling Server Closet - No A/C Is Possible

  - by JamesCo

  We're moving into a new office in an old building in London (that's England :) and are walling off a 2m x 1.3m area where the router & telephone equipment currently terminates to use as a server closet. The closet will contain: 2 24-port switches 1 router 1 VSDL modem 1 Dell desktop 1 4-bay NAS 1 HP micro-server 1 UPS Miscellaneous minor telephony boxes. There is no central A/C in the office and there never will be. We can install ducting to the outside quite easily - it's only a couple of metres to the windows, which face a courtyard. My question is whether installing an extractor fan with ducting to the window should be sufficient for cooling? Would an intake fan and intake duct (from the window, too) be required? We don't want to leave a gap in the closet door as that'll let noise out into the office. If we don't have to put a portable A/C unit into the closet, that'd be perfect. The office has about 12 people; London is temperate, average maximum in August is 31 Celsius, 25 Celsius is more typical. The same equipment runs fine in our current office (same building as new office, also no A/C) but it isn't in an enclosed space. I can see us putting say one Dell 2950 tower server into the closet, but no more than that. So, sustained power consumption in the closet would currently be about 800w (I'm guessing); possibly in the future 2kw. The closet will have a ceiling and no windows and be well-insulated. We don't care if the equipment runs hot, so long as it runs and we don't hear it.

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• Web SMTP Server(foo.com) will not send mail to exchange server which is also(foo.com)

  - by Atom

  I think I understand this problem fully, but I do not know how to approach it or where to go in terms of troubleshooting. I've got my one domain http://foo.com that runs a Zen Cart installation that needs to be able to send emails to users(order confirmation, password reset). This works fine to send to any other domain BUT foo.com. I'm running a locally hosted exchange server that is foo.com, and we can send and receive email just fine. If I run tail -f /usr/local/psa/var/log/maillog I recieve this error: Apr 1 10:08:51 foo qmail-local-handlers[25824]: Handlers Filter before-local for qmail started ... Apr 1 10:08:51 foo qmail-local-handlers[25824]: from= Apr 1 10:08:51 foo qmail-local-handlers[25824]: [email protected] Apr 1 10:08:51 foo qmail-local-handlers[25824]: cannot reinject message to '[email protected]' Apr 1 10:08:51 foo qmail: 1270141731.583139 delivery 32410: failure: This_address_no_longer_accepts_mail./ Apr 1 10:08:51 foo qmail: 1270141731.584098 status: local 0/10 remote 0/20 I understand that the foo.com SMTP service doesn't have any account but the one that is used to authenticate mail being sent, so of course, I understand why it's saying 'this address no longer accepts mail'. My question is, how can I get the foo.com(web) SMTP service to handle emails meant for my exchange server([email protected]) or how do I handle the mail that needs to be sent to our exchange server? Is this something to do with MX records? Thanks in advance A

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• How to prevent delays associated with IPv6 AAAA records?

  - by Nic

  Our Windows servers are registering IPv6 AAAA records with our Windows DNS servers. However, we don't have IPv6 routing enabled on our network, so this frequently causes stall behaviours. Microsoft RDP is the worst offender. When connecting to a server that has a AAAA record in DNS, the remote desktop client will try IPv6 first, and won't fall back to IPv4 until the connection times out. Power users can work around this by connecting to the IP address directly. Resolving the IPv4 address with ping -4 hostname.foo always works instantly. What can I do to avoid this delay? Disable IPv6 on client? Nope, Microsoft says IPv6 is a mandatory part of the Windows operating system. Too many clients to ensure this is set everywhere consistently. Will cause more problems later when we finally implement IPv6. Disable IPv6 on the server? Nope, Microsoft says IPv6 is a mandatory part of the Windows operating system. Requires an inconvenient registry hack to disable the entire IPv6 stack. Ensuring this is correctly set on all servers is inconvenient. Will cause more problems later when we finally implement IPv6. Mask IPv6 records on the user-facnig DNS recursor? Nope, we're using NLNet Unbound and it doesn't support that. Prevent registration of IPv6 AAAA records on the Microsoft DNS server? I don't think that's even possible. At this point, I'm considering writing a script that purges all AAAA records from our DNS zones. Please, help me find a better way. UPDATE: DNS resolution is not the problem. As @joeqwerty points out in his answer, the DNS records are returned instantly. Both A and AAAA records are immediately available. The problem is that some clients (mstsc.exe) will preferentially attempt a connection over IPv6, and take a while to fall back to IPv4. This seems like a routing problem. The ping command produces a "General failure" error message because the destination address is unroutable. C:\Windows\system32>ping myhost.mydomain Pinging myhost.mydomain [2002:1234:1234::1234:1234] with 32 bytes of data: General failure. General failure. General failure. General failure. Ping statistics for 2002:1234:1234::1234:1234: Packets: Sent = 4, Received = 0, Lost = 4 (100% loss), I can't get a packet capture of this behaviour. Running this (failing) ping command does not produce any packets in Microsoft Network Monitor. Similarly, attempting a connection with mstsc.exe to a host with an AAAA record produces no traffic until it does a fallback to IPv4. UPDATE: Our hosts are all using publicly-routable IPv4 addresses. I think this problem might come down to a broken 6to4 configuration. 6to4 behaves differently on hosts with public IP addresses vs RFC1918 addresses. UPDATE: There is definitely something fishy with 6to4 on my network. When I disable 6to4 on the Windows client, connections resolve instantly. netsh int ipv6 6to4 set state disabled But as @joeqwerty says, this only masks the problem. I'm still trying to find out why IPv6 communication on our network is completely non-working.

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• Server Bash Line Wrapping Over Text & In Wrong Place

  - by Pez Cuckow

  This is quite a hard problem to explain, when connecting to one of my servers using the bash shell, under any user the line wrapping is broken and has all sorts of problems. Once of which I detail in screenshots below: Other problems I experience include nano getting very confused about which line and or letter I am on, as shown by typing the same message into nano: These problems only occur when connecting as I previously mentioned to one of my servers which runs CentOs. Do you know why this is occurring and what I can do to fix it? On other servers the message works fine! Thanks for your time, Output of requested commands: Server that doesn't work properly: Working server: Could it perhaps be the custom prompt on the non working server? In .bashrc PS1='\e[1;32m\u@\h\e[m:\e[1;34m\w\e[m$ ' Commenting this out appeared to resolve the problem. Google says line wrapping errors can occur if you don't conform to these rules use the \[ escape to begin a sequence of non-printing characters, and the \] escape to signal the end of such a sequence I am not sure where this would fit in on my prompt?

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• Share Point ACL on OSX Lion Server - Posix group always takes over ACLs

  - by Ben

  Trying to configure a share point on a Lion Server machine. The directory is created by the local server admin (serveradmin) and has rwxr-x--- given to it. The serveradmin user belongs to the local staff group so serveradmin readwrite staff group read Others none We have an OD group for all the employees (Workers) . Using the Server tool we've given Full Control to the share point: Workers Full Control serveradmin readwrite staff group read Others none We would assume that Workers could then do what they want on the share but that doesn't seem to be the case. It appears the POSIX permissions take over the ACL permissions for Worker. If I change the staff permission to readwrite then the Workers can create a file or folder in the share point. I would think the ACL should take over but it doesn't, posix always win, rendering ACL useless. Furthermore if I leave the readwrite permission for staff and take Write permission away for the Workers group then the posix group still wins. Essentially the Workers ACL does absolutely nothing. There are reports of similar problems in this Apple forum thread: https://discussions.apple.com/thread/3722901 The directory nesting fix suggested there doesn't work for us. Has anyone had similar issues and know how to fix this? Edit: in Workgroup Manager the employees user are set to primary group staff and given the additional OD group Workers. Changing their primary group doesn't help, it only shifts the problem onto Others taking over rights (logically) Edit 2: Ok, this is interesting, adding OD Users to the share's ACL works totally fine

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• Can access SSH but can't access cPanel web server

  - by Tom

  I've built a Cent OS 6.0 vps and then i've installed the latest cPanel/WHM. This isn't my first installation but i've noticed something weird especially that i've never used the 6.0 version.. when i tried to install cPanel, it didn't recognize wget so installed it, then cPanel said that Perl isn't installed, i've installed that and the installation went well since then. Now, when i've tried to access the server via the browser with the IP Adress as i've used to, it didn't work, it was just loading forever, i tried the 2087 port, still the same. but SSH works. I've also tried the commands to start the server manually but none of them worked. How to fix that? Edit: iptables -nL Result root@server [~]# iptables -nL Chain INPUT (policy ACCEPT) target prot opt source destination acctboth all -- 0.0.0.0/0 0.0.0.0/0 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:22 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited Chain FORWARD (policy ACCEPT) target prot opt source destination REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited Chain OUTPUT (policy ACCEPT) target prot opt source destination acctboth all -- 0.0.0.0/0 0.0.0.0/0 Chain acctboth (2 references) target prot opt source destination tcp -- 216.119.149.168 0.0.0.0/0 tcp dpt:80 tcp -- 0.0.0.0/0 216.119.149.168 tcp spt:80 tcp -- 216.119.149.168 0.0.0.0/0 tcp dpt:25 tcp -- 0.0.0.0/0 216.119.149.168 tcp spt:25 tcp -- 216.119.149.168 0.0.0.0/0 tcp dpt:110 tcp -- 0.0.0.0/0 216.119.149.168 tcp spt:110 icmp -- 216.119.149.168 0.0.0.0/0 icmp -- 0.0.0.0/0 216.119.149.168 tcp -- 216.119.149.168 0.0.0.0/0 tcp -- 0.0.0.0/0 216.119.149.168 udp -- 216.119.149.168 0.0.0.0/0 udp -- 0.0.0.0/0 216.119.149.168 all -- 216.119.149.168 0.0.0.0/0 all -- 0.0.0.0/0 216.119.149.168 all -- 0.0.0.0/0 0.0.0.0/0

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• Trying to use a SmartHost with my Exchange 2010 server

  - by Pure.Krome

  Hi folks, I'm trying to use a SmartHost with my Exchange 2010 Server. SmartHost details: Secure SMTPS: securemail.internode.on.net 465 <-- Note: that's port 465 Configure your existing SMTP settings (in your email program) to: use authentication (enter your Internode username and password, enter your username as [email protected]). enable SSL for sending email (SMTPS). So I've added the smart host details to my Org Config -> Hub Transport. I then used PowerShell to add the port:- Set-SendConnector "securemail.internode.on.net" -port 465 I've then added my username/password (as suggested above) to the SmartHost as Basic Authentication (with no TLS). Then I try sending an email and I get the following error message :- 451 4.4.0 Primary target IP address responded with: "421 4.4.2 Connection dropped due to ConnectionReset." So i'm not sure how to continue. I also tried ticking the TLS box but stll I get the same error. If i don't use SMTPS (secure SMTP, on port 465) and use basic SMTP on port 25 with no Authentication, email gets sent. Any ideas? EDIT: Btw, I can telnet to that server on port 465 from my mail server .. just to make sure i'm not getting firewall'd, etc.

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• DNS server not working?

  - by Behrooz A

  I just set up a DNS Server on my windows 7, called SimpleDNS I added a zone for example sag.com and defined www.sag.com and sag.com to 192.168.1.2 (my Network IP Address) . the problem is when I try to ping sag.com the SimpleDNS logs says that it answered the request with 192.168.1.2 , but the ping doesn't resolve anything . SimpleDNS logs: > 14:00:43 Request from 192.168.1.2 for A-record for www.sag.com > 14:00:43 Sending reply to 192.168.1.2 about A-record for > www.sag.com: 14:00:43 -> Answer: A-record for www.sag.com = > 192.168.1.2 14:00:43 -> Authority: NS-record for www.sag.com = mehr-pc nslookup : > C:\Users\Mehr\Desktop>nslookup www.sag.com DNS request timed out. > timeout was 2 seconds. Server: UnKnown Address: 192.168.1.1 > > DNS request timed out. > timeout was 2 seconds. DNS request timed out. > timeout was 2 seconds. DNS request timed out. > timeout was 2 seconds. DNS request timed out. > timeout was 2 seconds. > *** Request to UnKnown timed-out the DNS server IP is 192.168.1.2 , and Access point address : 192.168.1.1 what should I do?

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• Forward Apache to Django dev server

  - by Alex Jillard

  I'm trying to get apache to forward all requests on port 80 to 127.0.0.1:8000, which is where the django dev server runs. I think I have it forwarding properly, but there must be an issue with 127.0.0.1:8000 not being run by apache? I'm running the django dev server in an ubuntu vmware instance, and I'd other people in the office to see the apps in development without having to promote anything to our actual dev/staging servers. Right now the virtual machine picks up an IP for itself, and when I point a browser to that url with the defualt apache config, I get the default apache page. I've since changed the httpd.conf file to the following to try and get it to forward the requests to the django dev server: ServerName localhost <Proxy *> Order deny,allow Allow from all </Proxy> <VirtualHost *> ServerName localhost ServerAdmin [email protected] ProxyRequests off ProxyPass * http://127.0.0.1:8000 </VirtualHost> All I get are 404s with this, and in error.log I get the following (192.168.1.101 is the IP of my computer 192.168.1.142 is the IP of the virtual machine): [Mon Mar 08 08:42:30 2010] [error] [client 192.168.1.101] File does not exist: /htdocs

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• CSV engine on MySQL server

  - by Jeff

  I don't think that this is a programming question so I am going to ask it here - Reading the book high performance mysql, I read about the CSV engine. The paragraph says: The CSV engine can treat comma-separated values (CSV) files as table, but it does not support indexes on them. This engine lets you copy files in and out of the database while the server is running. If you export a CSV file from a spreadsheet and save it in the MySQL server's data directory, the server can read it immediately. Similary, if you write data to a CSV table, an external program can read it right away. CSV tables are especially useful as a data interchange format and for certain kinds of logging. What I get from this paragraph is that I can copy a .CSV file into the data directory of database, and it should show as a table that is able to be read from. However, whenever I copy a test .csv file into the directory, it does not appear as a table. I can't access it. I am using MySQL 5.5 also Does anyone know why this is not working, or what I am doing wrong? Thanks

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• High latency issue for web service call from amazon aws ec2 to local server

  - by SibzTer

  We have a legacy web application that is running in our data center on premises located in Houston. We have a developed a new .net 4 based web application in order to provide new features to customers. The new web application is hosted in amazon aws ec2 environment (N. Virginia region us-east-1b zone). In order to get seamlessly integrate with the legacy application the new web application makes web service calls to retrieve data. We are seeing an unusually high latency time in the order of 5+ seconds for these web service calls. The exact same web service call returns in less than a second on our local PCs (which makes sense given physical proximity to the actual server). The weird part is that we have developers in California who also have the same milliseconds response time. We are testing the web service response using third party tools such as SoapUI, Google Chrome extensions such as Advanced REST Client, Postman REST Client, etc. As if this wasnt weird enough, we have noticed the same low latency from certain other ec2 instances while testing which are in the same region and availability zone as well. If we experienced the high latency consistently from all the ec2 instances I could understand. But there is something else going on. Comparing the various stats and results between the low latency and high latency ec2 servers do not show any significant differences: ping (constant 40ms), tracert, winmtr, etc. We have instances that are in the VPC as well. So I tried both the public and private IP address of the web service host server and that didnt make a difference either for the above results. We need to resolve this latency issue as this is causing the resulting web pages to load very slowly (almost 15+ seconds which is simply unacceptable). The ec2 instances have Windows Server Datacenter 64 bit. Let me know if there is any other infor I can provide to help diagnose this.

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• Windows Server 2003 DC hangs after network drivers update

  - by tcv

  Earlier today, we attempted to update the Broadcom BCM5716C network drivers on a Windows Server 2003. (Dell PowerEdge T310, FWIW). Since then we have not been able to boot the server in any normal mode. Safe Mode works. Safe Mode with Networking and regular bootups hang at "Applying Network Settings." I haven't tried Last Known Good Configuration nor have I tried Directory Services Restore Mode. I should also mention that the longest I've allowed "Applying Network Settings" was perhaps 30 minutes. I spoke to Dell since the server is under a basic warranty. They sent me the original Broadcom drivers. The trouble seems to be, however, that since I can only boot in Safe Mode, I can't install the application package as given. In safe mode, I receive the error: "The system administrator has set policies to prohibit this installation." I can install the drivers independently, but that doesn't allow the NICs to work. The most I've been able to get are Code 10 errors on each NIC. I plan to get back to the site tomorrow to attempt installation of a different NIC. I'm wondering what else I can try.

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• Cannot Access a Shared Folder Using Windows 2008

  - by peter

  Hi All, I have a NAS drive, and this is sharing some folders. I cannot access those folders from a windows 2008 machine which is on the network. The are both connected to the same network switch. e.g. if I go like this, \\server\ or \\server\folder I get the message 'windows cannot access \\server check the spelling, click diagnose' etc. Error code: 0x80004005 The thing is that I can connect to this shared drive from a windows 7 laptop connected wirelessly to the same network. I can ping the server from windows 2008, but only if I use the IP address, not the server name.

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• Strange Upload Problem on Hyper-V

  - by Ring0

  Hi, This one is driving me totally nuts. I have being trying to upload a file to www.virustotal.com (its a harmless exe I have since found out - DiskWipe.exe from diskwipe.org). Using IE8. From Win 7 and Win 2008 R2 Datacenter (which I select to boot from vhd's) onto my main machine hardware, and also on another Win 7 PC elsewhere on my network, when I upload the file to virustotal.com it works perfectly. So, using my native NIC's everything is fine. Using another machine also perfect. Right. OK, from my boot menu the default is my main development machine - the one I'm typing on now. This runs on the metal and has Hyper-V role and I have some guests. All guests are not running. Amazingly, from my console (root partition to be exact) or any guest OS 2003 /XP / 2008 R2 etc. My upload to virustotal.com slows at 32% then HANGS at 38.something% & never finishes!! Here is the kicker. I have another box (my main server) running Hyper-V on the metal and three live guests. Identical H/W to my main dev machine in another room. (Except OS is Datacenter - Mine is Enterprise). If I try and upload from its bare metal console or any guest this file to virustotal.com using IE8 it stops exactly in the same place!! As for "steps I have tried etc." are kind-of blown out of the water as my server box is doing the precise same thing as the machine in my room here. OK, comonalities: Mobo: Gigabyte GA-X58-UD5, 12GB Kingston RAM, Corei7 920 4 cores hyperthreading = 8 & Realtek RTL8168D/8111D Family PCI-E Gigabit Ethernet NIC's. All 3 machines have this same motherboard - revision F11 Bios, all have 12GB RAM, all have the Realtek Nic's. All x64 by the way as I mentioned before I have a Win 7 box also with the UD5 m/Board, 12 GB RAM - bit of an overkill. :-) All these machines when NOT running Hyper-V can upload this file. Perhaps you may like to try it on a Hyepr-v (2008 R2) yourselves with IE8 and the desktop experience is on. See if it works or fails for you. Root OS or any guest. So, looking like its the NIC + Hyper-V = Cannot upload this file (any file I must add.) Realtek Nic is Ver 7.002.1125.2008. Using IE8 I see in the nic settings there are the usual parameters for Jumbo frames / Checksum offloading etc. several others. Should I fiddle with these? I ran Netmon 3.3 in a guest and the TCP session halted as the upload failed. I suppose I could study that further. I dont have Netmon on the root partition machine (yet)! All OS's fully patched - including todays defender files. My box running Office 2007 - but identical server in another room is not. Also, if I fire up a VPN to a distant client and do the upload it works! Of course its a different network path. Suggestions welcome please. If I left out anything important - please yell at me. Many Thanks,

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• ColdFusion 9 server not restaring - “Permission denied” errors

  - by Xevi Pujol

  I had to restart my ColdFusion 9 server on CentOS because of a memory performance issue, but now the server won't restart again. When looking at cfserver.log I can see how there's "Permission denied" errors all along. The ColdFusion application folder (/opt/coldfusion9/) is owned by nobody:root, as that fixed a similar problem that we had a few weeks ago. Also, the last time this CF server was running correctly, the JRE user that was being used was nobody. Maybe CF is trying to restart using another user (presumably apache) and that creates permission issues? However, I'm not sure how to check this hypothesis. Where's the config file that tells CF what JRE user to utilize? If I can change that, I could try to specify nobody there. Any other ideas also welcome. UPDATE: The runtime user that Coldfusion will utilise is defined in /etc/init.d/coldfusion_9. I fixed the problem by being consistent with the users: I needed to revert the ownership of the folder /opt/coldfusion9/ back to apache:root, which matches the init file.

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• Ubuntu Server mdadm drbd ocfs2 kvm hangs under heavy file reading

  - by Stefano Annese

  I have deployed four ubuntu 10.04 server. They are coupled two by two in a cluster scenario. on both sides we have software raid1 disks, drbd8 and OCFS2 and on top of it some kvm machines run with qcow2 disks. I followed this: Link corosync is just used for DRBD and OCFS, the kvm machines are run "manually" When it works is fine: good performances, good I/O, but at a given time one of the two cluster started hanging. Then we tried with just one server turned on and it hangs the same. It seems to happen when an heavy READ in one of the virtual machines occurs, that is during rsyn backup. When the fact occurs the virtual machines are not reachable any more and the real server responds with good delay to the ping but no screen and no ssh is available. All we can do is force shutdown (hold the button) and restart and when it turns on again the raid on which relay drbd is resyncing. All the time it hangs we see such fact. After a couple of week of pain on one side this morning also the other cluster hung, but it has different moteherboard, ram, kvm instances. What is similar is reading for rsync scenario and Western Digital RAID Edistion disks on both side. Can anybody give me some input to solve such issue?

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• OpenBSD logins via SSH seem to be ignoring my configured radius server

  - by Steve Kemp

  I've installed and configured a radius server upon my localhost - it is delegating auth to a remote LDAP server. Initially things look good: I can test via the console: # export user=skemp # export pass=xxx # radtest $user $pass localhost 1812 $secret Sending Access-Request of id 185 to 127.0.0.1 port 1812 User-Name = "skemp" User-Password = "xxx" NAS-IP-Address = 192.168.1.168 NAS-Port = 1812 rad_recv: Access-Accept packet from host 127.0.0.1 port 1812, id=185, Similarly I can use the login tool to do the same thing: bash-4.0# /usr/libexec/auth/login_radius -d -s login $user radius Password: $pass authorize However remote logins via SSH are failing, and so are invokations of "login" started by root. Looking at /var/log/radiusd.log I see no actual log of success/failure which I do see when using either of the previous tools. Instead sshd is just logging: sshd[23938]: Failed publickey for skemp from 192.168.1.9 sshd[23938]: Failed keyboard-interactive for skemp from 192.168.1.9 port 36259 ssh2 sshd[23938]: Failed password for skemp from 192.168.1.9 port 36259 ssh2 In /etc/login.conf I have this: # Default allowed authentication styles auth-defaults:auth=radius: ... radius:\ :auth=radius:\ :radius-server=localhost:\ :radius-port=1812:\ :radius-timeout=1:\ :radius-retries=5:

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• Some clients cannot connect to Server 2008 R2 VPN

  - by Robl

  Hi all, Have a server 2008 r2 setup as a VPN server. We have created a windows group to control access to the VPN called vpn-users. Clients are all Windows 7 Pro. This all seems to work fine except some users cannot connect to the VPN! For example I try to logon to the VPN from a client and get an error saying the server refused the connect due to a policy in place. Specifically authentication type! Fine I think. So i drop that user into the vpn-users group created for this and try again and hey presto the user can now logon! Great. Now try this with another user. But this time I get the same error even though I have dropped them into the vpn-users group!! So does anyone have any idea why this works for some users and not for others?? I have tried moving the user from certain OU's in AD to others, copying the account, taking the user out of the vpn-users group and then back in but get the same error each time. Any thoughts anyone?

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• One server running Django (with Nginx and Apache) and Wordpress Blog

  - by JCWong

  I have nginx listening to port 80 for my primary site foo.com. It proxys to port 8080 which is where the Django app lives server { listen 80; server_name www.foo.com foo.com; access_log /home/jeffrey/www/ddt/logs/nginx_access.log; error_log /home/jeffrey/www/ddt/logs/nginx_error.log; location / { proxy_pass http://127.0.0.1:8080; include /etc/nginx/proxy.conf; } location /media/ { root /home/jeffrey/www/ddt/; } location /static/ { root /home/jeffrey/www/ddt/; } location /public/ { root /home/jeffrey/www/ddt/; } } I'd like to have a wordpress blog run on the same server. Apache is listening to port 8080 with this http.conf file NameVirtualHost *:8080 WSGIScriptAlias / /home/jeffrey/www/ddt/apache/ddt.wsgi WSGIPythonPath /home/jeffrey/www/ddt <Directory /home/jeffrey/www/ddt/apache/> <Files ddt.wsgi> Order deny,allow Allow from all </Files> </Directory> I added my Wordpress site using a virtualhost <VirtualHost *:8080> ServerName www.bar.com ServerAlias bar.com DocumentRoot /home/jeffrey/www/jeffrey_wp </VirtualHost> When I go to bar.com I still see my django app. Is it possible for these two sites to run on the same server?

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• Linux Tuning for High Traffic JBoss Server with LDAP Binds

  - by Levi Stanley

  I'm configuring a high traffic Linux server (RedHat) and running into a limit I haven't been able to track down. I need to be able to handle sustained 300 requests per second throughput using Nginx and JBoss. The point of this server is to run checks on a user's account when that user signs in. Each request goes through Nginx to JBoss (specifically Torquebox with JBoss A7 with a Sinatra app) and then makes an LDAP request to bind that user and retrieve several attributes. It is during the bind that these errors occur. I'm able to reproduce this going directly to JBoss, so that rules out Nginx at least. I get a variety of error messages, though oddly JBoss stopped writing to the log file recently. It used to report errors about creating native threads. Now I just see "java.net.SocketException: Connection reset" and "org.apache.http.conn.HttpHostConnectException: Connection to http://my.awesome.server:8080 refused" as responses in jmeter. To the best of my knowledge, I have plenty of available file handles, processes, sockets, and ports, yet the issue persists. Unfortunately, I have very little experience tuning servers. I've found a couple useful documents - Ipsysctl tutorial 1.0.4 and Linux Tuning - but those documents are a bit over my head (and just entering the the configuration described in Linux Tuning doesn't fix my issue. Here are the configuration changes I've tried (webproxy is the user that runs Nginx and JBoss): /etc/security/limits.conf webproxy soft nofile 65536 webproxy hard nofile 65536 webproxy soft nproc 65536 webproxy hard nproc 65536 root soft nofile 65536 root hard nofile 65536 root soft nproc 65536 root hard nofile 65536 First attempt /etc/sysctl.conf sysctl net.core.somaxconn = 8192 sysctl net.ipv4.ip_local_port_range = 32768 65535 sysctl net.ipv4.tcp_fin_timeout = 15 sysctl net.ipv4.tcp_keepalive_time = 1800 sysctl net.ipv4.tcp_keepalive_intvl = 35 sysctl net.ipv4.tcp_tw_recycle = 1 sysctl net.ipv4.tcp_tw_reuse = 1 Second attempt /etc/sysctl.conf net.core.rmem_max = 16777216 net.core.wmem_max = 16777216 net.ipv4.tcp_rmem = 4096 87380 16777216 net.ipv4.tcp_wmem = 4096 65536 16777216 net.core.netdev_max_backlog = 30000 net.ipv4.tcp_congestion_control=htcp net.ipv4.tcp_mtu_probing=1 Any ideas what might be happening here? Or better yet, are there some good documentation resources designed for beginners?

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• How can I work around problems with certificate configuration in Remote Desktop Services?

  - by Michael Steele

  I am setting up a Remote Desktop Services farm, and am having trouble configuring certificates for it to use. A demonstration of the problem I'm seeing can be found in Step #4. At this point I am convinced that there are problems with the user interface, and am looking for ways around them. Is there any way to configure certificates in Remote Desktop Services so that the settings hold and are reflected in the GUI? If not, is there any way for me to verify that the settings are correct? Step #1 - Create certificate to be used. I've configured a certificate to use with RD Web Access. The certificate is stored with in the Certificates MMC on my RD Connection Broker, and I am configuring the farm from that computer. I found by letting RD Web Access generate its own certificate that the following properties are required: Enhanced Key Usage Server Authentication Client Authentication This may not be required, but the self-signed certificate includes it. Key Usage Digital Signature Key Agreement Subject Alternative Name DNS Name=domain.com Detour about self-signed certificate generation As a quick detour, I was able to work around a problem with creating self-signed certificates using powershell. The documentation for the New-RDCertificate cmdlet gives the following example: PS C:\> $password = ConvertTo-SecureString -string "password" -asplaintext -force New-RDCertificate -Role RDWebAccess -DnsName "test-rdwa.contoso.com" -Password $password -ConnectionBroker rdcb.contoso.com -ExportPath "c:\test-rdwa.pfx" Typing this into the shell will result in an error message claiming that a function, Get-Server cannot be found. Prior to using New-RDCertificate, you must import the RemoteDesktop Module with Import-Module RemoteDesktop. Step #2 - Observe out-of-box behavior The first time you visit the Deployment Properties dialog box by navigating to Server Manager - Remote Desktop Services - Collections and selecting "Edit Deployment Properties" from the "TASKS" dropdown list in the "COLLECTIONS" grouping, you will see the following screen: This window is misleading because the level field is listed as "Not Configured". If I understand correctly all three of the role services are using a self-signed certificate. For the RD Web Access role this can be verified by visiting the website: The certificate being used also appears in the Certificates MMC: Step #3 - Assign new certificate The Deployment Properties dialog box will allow me to select my existing certificate. The certificate must be placed within the local computers Certificates MMC in the "Personal" certificate store. The private key will need to be exportable, and you will need to provide the password. I temporarily exported my certificate to a file named temp.pfx with a password, and then imported it into Remote Desktop Services from there. Once this is done the GUI will indicate that it is ready to accept the new configuration. Once I click the "Apply" button, the GUI indicates success. This can be verified by visiting the RD Web Access web site a second time. There is no certificate error. Step #4 - The GUI fails to maintain its state If the GUI is closed and reopened, all of these settings appear to be lost. Actually, the certificate I configured is still being used. I am able to continue accessing the RD Web Access site without any certificate errors. Oddly, if I use the "Create new certificate..." button to generate a self-signed certificate this window will update to an "Untrusted" level. This setting will then be maintained through the opening and closing of the Deployment Properties dialog box. Is there anything I can do to have my settings appear to stick? I feel like something is wrong when the GUI claims I haven't fully configured certificates.

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• Filezilla client unable to get directory listing from Filezilla Server (Windows)

  - by sestocker

  I've set up a self signed certificate in FileZilla server and enabled FTP over SSL/TPS. When I connect from the client FileZilla, I am able to authenticate but cannot get a directory listing: Status: Connecting to MY_SERVER_IP:21... Status: Connection established, waiting for welcome message... Response: 220-FileZilla Server version 0.9.39 beta Response: 220-written by Tim Kosse ([email protected]) Response: 220 Please visit http://sourceforge.net/projects/filezilla/ Command: AUTH TLS Response: 234 Using authentication type TLS Status: Initializing TLS... Status: Verifying certificate... Command: USER MYUSER Status: TLS/SSL connection established. Response: 331 Password required for MYUSER Command: PASS ******** Response: 230 Logged on Command: PBSZ 0 Response: 200 PBSZ=0 Command: PROT P Response: 200 Protection level set to P Status: Connected Status: Retrieving directory listing... Command: PWD Response: 257 "/" is current directory. Command: TYPE I Response: 200 Type set to I Command: PORT 10,10,25,85,219,172 Response: 200 Port command successful Command: MLSD Response: 150 Opening data channel for directory list. Response: 425 Can't open data connection. Error: Failed to retrieve directory listing I have ports 21 and 50001 through 50005 open on the firewall. We are migrating servers - the 50001 - 50005 is one of the things that helped get FTPS working on the old server. I'm not sure this installation would use the same ports? What else could be the problem?

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• RoboCopy errors on Windows Server 2008

  - by Steve

  I am getting bizarre error with RoboCopy in Server 2008. It will randomly hang with "The specified network name is no longer available." error. Once that happens, it will continue to fail on the retries. But of course the remote server IS still available on the network and can be reached with other tools. I think it must be somehow permission related but I can't figure out what is wrong. Any ideas would be much appreciated. Other info: Options : *.* /S /E /COPY:DAT /NP /R:10 /W:30 If I turn on the /B option it will fail 100% of the time at the very beginning (that's why I think it has to be somehow permission-related) The two servers are standalone and I am doing a NET USE command prior to the robocopy It does not matter what user account on the remote server. Tried both Administrator and another user which was also a member of the local Administrators group UAC is turned off on both sides It is not always the same file that hangs. Sometimes it will get through half or more and sometimes it will fail on the first file

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