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  • Strange problem with Exchange client connection

    - by Sam Cogan
    I've got a strange problem with an Exchange 2007 server running on SBS 2008. It's been working fine for users for the last 5 months, then 5 days ago they started getting a problem where Outlook would popup a window asking for credentials. If the user enters there credentials it pops up again and again, however if the user cancels the box it goes away and outlook continues to work fine. These clients all connect using Outlook Anywhere, and OWA access is also working fine. I had thought this message box may have been to do with other POP or IMAP accounts being configured in Outlook, but it's not the case. I have re-configured Outlook Anywhere on the server but to no avail. Using the RPC diagnostic tool in Outlook shows no problems. There are no errors showing in the event log. The server seems to be running fine, so to me this seems like either a client, or an RPC over HTTP issue, but I'm not getting anywhere finding the cause, any help is appreciated!

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  • Access Home Network Server via External Address (DSL vs Cable)

    - by Dominic Barnes
    For the last few months, I've been using a server on my home network for basic backups and hosting some small websites. Up until this past week, I've been using Comcast (cable) as an ISP and now that I've moved into an apartment, I'm using AT&T. (DSL) I've set up dynamic DNS and I can verify it works externally. However, I can't seem to access the public address from within the local network. Is there something DSL does differently from Cable that makes this frustration possible?

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  • How to check wifi networking standard of current connection

    - by yzfr1
    Both my router and my wireless networking card support the standards 802.11a/b/g/n but as I'm only getting speeds around 30-40 Mbit/s I suspect that it's the g standard being used instead of n. Now, I'd like to verify this somehow, so my question is: Is there a way (like a network diagnistics tool or the like) to find out which standard is currently used in the communication between computer and router?

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  • Remote connection to SQL server doesn't use the instance name

    - by Max
    I have a web server with SQL express 2008 installed. I was trying to connect to this from my local machine using SSMS. After enabling TCP/IP in SQL configuration manager, starting SQL browser service and opening up the firewall I still couldn't connect using xxx.xxx.xxx.xxx\sqlexpress as the server name. Finally out of frustration I tried to connect taking off the sqlexpress instance name to just xxx.xxx.xxx.xxx and it worked! I'm really at a loss here as to why this works. What would happen if I installed more instances of SQL?

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  • Unable to logon using terminal server connection

    - by satch
    I have several W2K3 SP2 servers, admin TS enabled. I discovered this morning, I was unable to logon into some of them. I've a couple of Citrix servers in different farms, a SAP (IA64) app server and a cvs server. All of them show same sympthoms; remote connections are refused. I've been able to logon locally, and terminal server service is up, there are no users (so connections are not depleted). There are no errors in log in most servers. One of the Citrix ones, reported following errors: Event ID 50 Source TermDD Type Error Description The RDP protocol component X.224 detected an error in the protocol stream and has disconnected the client. and Event ID 1006 Source TermService Type Error Description The terminal server received large number of incomplete connections. The system may be under attack. Anyway, I suppose these errors appear because server isn't working, and Citrix users try to logon massively. (I nmap'ed server and port seems up). I've solved this problem rebooting before, but with so many servers affected it seems like a crappy workaround. Any idea about troubleshooting it properly? Thanks in advance

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  • How to share internet connection on Mac os x to Virtualbox vm's using Host-only

    - by redben
    In one line : is the following possible : Airport <- osx bridge - vbox-Host-only - vm's On a mac os x, i have virtual box with a virtual machine. For now i have configured 2 interfaces for my virtual machine eth0 is normal bridge for my vm to acces the internet (when airport is connected) eth1 is set to host-only so i can access my vm from the host when there is no wifi/aiport is down. So basically it's like Adapter 1 when there is Wifi, Adapter 2 when there is not. I'd like to have only one configuration to make it simpler. I thought i could just keep the Host only configuration, and on the host (os x) go to internet sharing and select "share from airport" to vboxnet0 (the vb virtual interface). Only to find out that vboxnet0 dosn't show up in the interfaces list on os x preferences. I know that on a linux host you could install something called bridge-utils and use that to bridge the two insterfaces. Is there any thing like that for Mac ?

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  • Restrict SSH user to connection from one machine

    - by Jonathan
    During set-up of a home server (running Kubuntu 10.04), I created an admin user for performing administrative tasks that may require an unmounted home. This user has a home directory on the root partition of the box. The machine has an internet-facing SSH server, and I have restricted the set of users that can connect via SSH, but I would like to restrict it further by making admin only accessible from my laptop (or perhaps only from the local 192.168.1.0/24 range). I currently have only an AllowGroups ssh-users with myself and admin as members of the ssh-users group. What I want is something that works like you may expect this setup to work (but it doesn't): $ groups jonathan ... ssh-users $ groups admin ... ssh-restricted-users $ cat /etc/ssh/sshd_config ... AllowGroups ssh-users [email protected].* ... Is there a way to do this? I have also tried this, but it did not work (admin could still log in remotely): AllowUsers [email protected].* * AllowGroups ssh-users with admin a member of ssh-users. I would also be fine with only allowing admin to log in with a key, and disallowing password logins, but I could find no general setting for sshd; there is a setting that requires root logins to use a key, but not for general users.

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  • Using radvd to advertise ipv6 over VPN connection using DD-wrt

    - by Sean Madden
    My ultimate goal is to allow VPN users to have access to my internal IPv6 network from across the intertubes. I've got a linksys WRT54GSv2 running DD-WRTv24SP1 and have configured the little guy as specified here http://www.dd-wrt.com/wiki/index.php/IPv6 and it works wonderfully over the br0 interface (LAN/WLAN bridge). Here's the issue though, when I add an additional interface to the radvd config file on the router (specifically ppp0, for the VPN traffic), radvd refuses to start. The kicker is that on DDWRT, it doesn't give an error message, it just fails outright. Any suggestions on where to proceed from here? /jffs/radvd.conf: interface br0 { AdvSendAdvert on; prefix 0:0:0:1::/64 { AdvOnLink on; AdvAutonomous on; }; }; interface ppp0 { AdvSendAdvert on; prefix 0:0:0:1::/64 { AdvOnLink on; AdvAutonomous on; }; }; The documentation I've found for radvd is slim, but if anyone has a decent idea on how to proceed I'd love to hear it.

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  • Access internal host from a subdomain of an external dns

    - by Mihai
    This image contains the topology I want to make work. I have a linux server that is used for hosting websites and also routing for our internal network. How can I access the internal server that hosts the team foundation server from outside from a domain like teamfoundation.example.com. The parent domain is hosted on the linux machine, is there a way to NAT the dns queries to the windows server? |LINUX SERVER| example.com | | Windows Server(teamfoundation.example.com) _______|_________SWITCH Internal Network

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  • Continuous outbound connection from QNAP NAS

    - by user192702
    I notice on my firewall that my QNAP NAS is continuously sending UDP sessions out to the Internet. Every second I have 5 - 7 connections out to addresses like the following: 2013-11-10 23:17:54 Deny 192.168.60.5 93.215.212.162 6881/udp 6881 6881 2013-11-10 23:18:05 Deny 192.168.60.5 87.76.0.83 29872/udp 6881 29872 2013-11-10 23:18:05 Deny 192.168.60.5 5.164.188.224 6881/udp 6881 6881 2013-11-10 23:18:05 Deny 192.168.60.5 80.61.45.206 6881/udp 6881 6881 2013-11-10 23:18:34 Deny 192.168.60.5 37.117.204.129 6881/udp 6881 6881 2013-11-10 23:18:34 Deny 192.168.60.5 71.67.101.30 51413/udp 6881 51413 2013-11-10 23:18:34 Deny 192.168.60.5 89.28.92.191 8621/udp 6881 8621 2013-11-10 23:18:34 Deny 192.168.60.5 94.244.157.85 28221/udp 6881 28221 2013-11-10 23:18:34 Deny 192.168.60.5 213.241.61.240 9089/udp 6881 9089 2013-11-10 23:18:45 Deny 192.168.60.5 88.163.28.100 52721/udp 6881 52721 2013-11-10 23:18:45 Deny 192.168.60.5 37.55.190.20 10027/udp 6881 10027 2013-11-10 23:18:45 Deny 192.168.60.5 62.72.188.146 14306/udp 6881 14306 2013-11-10 23:19:14 Deny 192.168.60.5 85.53.244.205 51413/udp 6881 51413 2013-11-10 23:19:14 Deny 192.168.60.5 67.163.18.215 52130/udp 6881 52130 2013-11-10 23:19:14 Deny 192.168.60.5 86.172.105.140 9089/udp 6881 9089 2013-11-10 23:19:14 Deny 192.168.60.5 99.28.56.121 52383/udp 6881 52383 2013-11-10 23:19:14 Deny 192.168.60.5 109.60.184.249 46217/udp 6881 46217 2013-11-10 23:19:25 Deny 192.168.60.5 121.107.144.174 21135/udp 6881 21135 2013-11-10 23:19:25 Deny 192.168.60.5 84.39.116.180 48446/udp 6881 48446 2013-11-10 23:19:25 Deny 192.168.60.5 183.238.254.62 openvpn/udp 6881 1194 ......... This is frightening as it seems like it's been hacked to send information out. Has anyone observed this behaviour from their QNAP NAS?

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  • `sh` access denied over ssh connection

    - by inspectorG4dget
    I have an ubuntu server and a windows XP client running Cygwin. The server ssh's into the client and tries to execute a shell script with some params, with the following command: ssh user@IP_ADDR 'sh /home/user/project/clientside 2 5 7 6 9 5 7 IP_ADDR' where IP_ADDR is the IP address of client. However, while doing so, I get the following error: Access is denied. Thinking this might be a user permissions error, I tried running sh /home/user/project/clientside 2 5 7 6 9 5 7 IP_ADDR on the client, on Cygwin, while logged in as user. This works as expected. Then I thought that this might be an error with the login that I use when I ssh into the client. So I executed this instead: ssh user@IP_ADDR 'whoami' and got back user. This happened even after I did chmod -R 777 /home/user/project on the client, in Cygwin. For kicks, I got on Cygwin on the client and did ssh localhost and manually executed sh /home/user/project/clientside 2 5 7 6 9 5 7 IP_ADDR. This worked as expected. However, when I did ssh IP_ADDR from Cygwin and did ssh localhost and manually executed sh /home/user/project/clientside 2 5 7 6 9 5 7 IP_ADDR, I get the same Access is denied. error. Why is this happening? How can I fix this? By the way, both the server and the client have each other's rsa public key for passwordless ssh

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  • How to forward external port to internal port using plink

    - by user857990
    For a penetration test where I have shell access to a computer running an old Windows, I'd like to forward port 4450 to 127.0.0.1:445 because the firewall is blocking 445 externally. I'm stuck on the following: plink -L 4450:127.0.0.1:445 SSH-Server According to the documentation I've found, I'd have to specify a SSH-Server. But all documentation I've found just uses an SSH-Server in the same network. To forward it to a localhost port, that wouldn't help. Do I have to install an SSH-Server on that machine or are there other ways?

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  • postfix is unable to send emails to external domains

    - by BoCode
    Whenever i try to send an email from my server, i get the following error: Nov 13 06:37:21 xyz postfix/smtpd[6730]:connect from unknown[a.b.c.d] Nov 13 06:37:21 xyz postfix/smtp[6729]: warning: host X.com[x.y.z.d]:25 greeted me with my own hostname xyz.biz Nov 13 06:37:21 xyz postfix/smtp[6729]: warning: host X.com[x.y.z.d]:25 replied to HELO/EHLO with my own hostname xyz.biz Nov 13 06:37:21 xyz postfix/smtp[6729]: 2017F1B00C54: to=<[email protected]>, relay=X.com[x.y.z.d]:25, delay=0.98, delays=0.17/0/0.81/0, dsn=5.4.6, status=bounced (mail for X.com loops back to myself) this is the output of postconf -n: address_verify_poll_delay = 1s alias_database = hash:/etc/aliases alias_maps = body_checks_size_limit = 40980000 command_directory = /usr/sbin config_directory = /etc/postfix connection_cache_ttl_limit = 300000s daemon_directory = /usr/libexec/postfix data_directory = /var/lib/postfix debug_peer_level = 1 debugger_command = PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin ddd $daemon_directory/$process_name $process_id & sleep 5 default_delivery_slot_cost = 2 default_destination_concurrency_limit = 10 default_destination_recipient_limit = 1 default_minimum_delivery_slots = 3 default_process_limit = 10000 default_recipient_refill_delay = 1s default_recipient_refill_limit = 10 disable_dns_lookups = yes enable_original_recipient = no hash_queue_depth = 2 home_mailbox = Maildir/ html_directory = no in_flow_delay = 0 inet_interfaces = all inet_protocols = ipv4 initial_destination_concurrency = 100 local_header_rewrite_clients = mail_owner = postfix mailq_path = /usr/bin/mailq manpage_directory = /usr/share/man master_service_disable = milter_default_action = accept milter_protocol = 6 mydestination = $myhostname, localhost.localdomain, localhost, $mydomain mydomain = xyz.biz myhostname = xyz.biz mynetworks = 168.100.189.0/28, 127.0.0.0/8 myorigin = $mydomain newaliases_path = /usr/bin/newaliases non_smtpd_milters = $smtpd_milters qmgr_message_active_limit = 500 qmgr_message_recipient_limit = 500 qmgr_message_recipient_minimum = 1 queue_directory = /var/spool/postfix queue_run_delay = 300s readme_directory = /usr/share/doc/postfix.20.10.2/README_FILE receive_override_options = no_header_body_checks sample_directory = /usr/share/doc/postfix.2.10.2/examples sendmail_path = /usr/sbin/sendmail service_throttle_time = 1s setgid_group = postdrop smtp_always_send_ehlo = no smtp_connect_timeout = 1s smtp_connection_cache_time_limit = 30000s smtp_connection_reuse_time_limit = 30000s smtp_delivery_slot_cost = 2 smtp_destination_concurrency_limit = 10000 smtp_destination_rate_delay = 0s smtp_destination_recipient_limit = 1 smtp_minimum_delivery_slots = 1 smtp_recipient_refill_delay = 1s smtp_recipient_refill_limit = 1000 smtpd_client_connection_count_limit = 200 smtpd_client_connection_rate_limit = 0 smtpd_client_message_rate_limit = 100000 smtpd_client_new_tls_session_rate_limit = 0 smtpd_client_recipient_rate_limit = 0 smtpd_delay_open_until_valid_rcpt = no smtpd_delay_reject = no smtpd_discard_ehlo_keywords = silent-discard, dsn smtpd_milters = inet:127.0.0.1:8891 smtpd_peername_lookup = no unknown_local_recipient_reject_code = 550 what could be the issue?

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  • Users not getting ip when connected through wifi,but wired connection getting ip in ddwrt router

    - by Kevin Parker
    I am having DD-WRT v24-sp2(05/08/11) running on Asus RT n 13 u B1 router,with dhcp on. But users not able to connect through wifi...its showing obtaining ip address and disconnects there after. Wired Devices are getting ip address and able to access internet.Wifi was working till yesterday,but all of a sudden it stopped working. on the ddwrt controlpanelsystem information under Wireless Clients mac address of clients that are trying to connect are appearing but soon it disappears. but no such issue with wired clients. Can any one please help me in fixing this..

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  • Slow boot for OS and external devices

    - by Derek Van Cuyk
    I have been having this problem intermittently but as of yesterday, it has become more consistent. It originally started when I rebooted my PC at home and the OS (Windows 8) sat in a loop appearing to do nothing while loading. I figured since this was a new installation, that something may have just become corrupted and I decided to reinstall. So I tried to boot off of the thumb drive which had the installation iso and encountered pretty much the same issue. Same with the DVD drive. So, I rebooted once again and left it to load the entire night just to see if it ever would and sure enough this morning, Windows had finally loaded. Authentication had the same roblem albeit not quite as long (took about 5 minutes to authenticate). However, once I was in, everything appeared to be working fine and as quick as normal with the exception of when I tried to scan the C drive for any errors, which ran unbearably slow (45 minutes and before I left for work and was not finished scanning a 64GB SSD drive). I mention that I have had this issue but never when loading the OS. Before it occurred when trying to install windows 7 from a different DVD drive than the one I have now. It took me about 3 hours to do it since I had to wait sometimes 30+ min for each step to finish processing. Does anyone have an idea as to what can cause this? I am assuming it is the motherboard since it is responsible for communication with all the devices I'm having issues with but I cannot find anyone else who has had a problem like this and don't want to drop more money on a MB if it isn't the problem. Hardware: Motherboard: Asus M4A78T-E Socket AM3/ AMD 790GX/ Hybrid CrossFireX Hard Drive: Kingston SSDNow V+180 64GB Micro SATA II 3GB/S 1.8 Inch Solid State Drive SVP180S2/64G Optical Drive: Samsung Blu-Ray Combo Internal 12XReadable and DVD-Writable Drive with Lightscribe SH-B123L/BSBP Thanks, Derek

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  • External routing for local interfaces in a virtualized network

    - by Arkaitz Jimenez
    Current setup: br0| |-- tun10 -pipe-tun0(192.240.240.1) |-- tun11 -pipe-tun1(192.240.240.2) |-- tun12 -pipe-tun2(192.240.240.3) The pipe program is a custom program that forwards data back2back between two tun interfaces. The idea is puting 2 programs in .2 and .3 while keeping .1 as the local interface in the current machine. The main problem is that I want to route packets to .2 and to .3 through .1 and br0, but as they are local interfaces, the kernel ignores any routing instruction, it just delivers the packet to the proper interface. Tried iptables, but the nat table doesn't even see ping packets to those ifaces. A "ping 192.240.240.2" delivers a icmp packet with source and dest .2 to tun1, ideally it should deliver a source .1 dest .2 at tun1 through tun0-br0-tun1 Any hint? Here the output of some commands: Output

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  • How to make ssh connection between servers using public-key authentication

    - by Rafael
    I am setting up a continuos integration(CI) server and a test web server. I would like that CI server would access web server with public key authentication. In the web server I have created an user and generated the keys sudo useradd -d /var/www/user -m user sudo passwd user sudo su user ssh-keygen -t rsa Generating public/private rsa key pair. Enter file in which to save the key (/var/www/user/.ssh/id_rsa): Created directory '/var/www/user/.ssh'. Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /var/www/user/.ssh/id_rsa. Your public key has been saved in /var/www/user/.ssh/id_rsa.pub. However othe side, CI server copies the key to the host but still asks password ssh-copy-id -i ~/.ssh/id_rsa.pub user@webserver-address user@webserver-address's password: Now try logging into the machine, with "ssh 'user@webserver-address'", and check in: .ssh/authorized_keys to make sure we haven't added extra keys that you weren't expecting. I checked on the web server and the CI server public key has been copied to web server authorized_keys but when I connect, It asks password. ssh 'user@webserver-address' user@webserver-address's password: If I try use root user rather than my created user (both users are with copied public keys). It connects with the public key ssh 'root@webserver-address' Welcome to Ubuntu 11.04 (GNU/Linux 2.6.18-274.7.1.el5.028stab095.1 x86_64) * Documentation: https://help.ubuntu.com/ Last login: Wed Apr 11 10:21:13 2012 from ******* root@webserver-address:~#

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  • Connection problem to MySQL on another machine on LAN

    - by Ankur
    I'm having trouble connecting to a MySQL database on the other machine on the same network. Could not connect to the specified instance. MySQL error number 1130 Host 'abc' is not allowed to connect to this MySQL server (Pinging ok time 1-3 ms ttl =128) I've checked out the following: TCP/IP enabled RegEdit under hlocal machine .... parameters .. maxUserpORT And timedelay.. Grant all . to 'root'@'Myipaddress'

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  • OpenVPN/Tunnelblick through wireless router, no connection.

    - by Oscar
    I'm using OpenVPN with Tunneblick on my Macbook Pro to access a server on my job. I't works fine, but i can't get it working with my Netgear WGT624v3 wireless router. I get this warning: WARNING: potential route subnet conflict between local LAN [192.168.1.0/255.255.255.0] and remote VPN [192.168.1.0/255.255.255.0] Someone told me that i should "port forward" on my router, but i can't figure out the right settings. Also not shure i'm doing it right.

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  • Acces internal host from a subdomain of an external dns

    - by Mihai
    Hy to all this image contains the topology i want to make it work. I have a linux server that is used for hosting websites and also routing for our internal network. How can i acces the internal server that hosts the team foundation server from outside, from a domain like teamfoundation.example.com. The parent domain is hosted on the linux machine, is there anyway to NAT the dns queries to the windows server? |LINUX SERVER| example.com | | Windows Server(teamfoundation.example.com) _|___SWITCH Internal Network

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  • Audigy 2 Coaxial to Coaxial/Optical connection possible?

    - by Chris
    Hello, The original question is deleted, and asked again below with accurate information. Edit: Excuse me for my ignorance, my friend has a Logitech Z-5500 set. I thought after comparing those systems on Google images that he had the Z-680, but he hasn't. This set has a single Digital coaxial for DVD or CD players or PC sound cards (requires coaxial cable, sold separately) cable. This single cable was connected to the orange tulip connector (SPDIF coaxial out) on the backside of his onboard HP Elite m9070, this connector is broken. How can I use the digital out with a single cable coaxial cable on the Audigy2 (see image below) (I have the following converters for my disposal, can I use one of these? 3.5 mm male - coax optical mini optical male - toslink optical female 2 x toslink optical female, toslink coupler, optical audio extension note: Is it possible to connect a toslink cable with an mini optical male - toslink converter on the digital out of the Audigy 2? (see image below)

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  • Mounting to external NFS from a KVM VM.

    - by jbfink
    I've got a machine acting as a KVM host and another machine that NFS exports to that KVM host. I'd like for one of the internal VMs on the KVM host to be able to mount the NFS share. I can export to the KVM host IP fine and do a mount, but it doesn't work for the internal VM; I just get a failed error with "reason given by server: Permission denied". I've already tried to re-export the NFS from host to VM, but apparently doing two levels of NFS is not a Good Idea. Anyone know how I might get this working?

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