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• Simulating network latency for localhost connection on Windows 7

  - by nitro2k01

  I need to simulate network latency to a program running on the local computer, connecting to a local service. Thus far I have tried dummynet (a windows build of ipfw) which I got working after some trial and error. While it generally works, I can't seem to get it to filter localhost traffic. Even after adding a rule from any to any which affects external traffic, this makes no difference for local connections. I would appreciate if anyone knows how to simulate local latency using dummynet or a different tool. The tool should be able to simulate latency generically in IP packets, (TCP and UDP) and not be protocol specific.

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• seamless mode remote desktop connection from linux to windows

  - by mateusz.fiolka

  I am a programmer using Linux as my main OS, however sometimes I need to use windows (ie, office, ea). I'm running qemu with kvm to access the windows "machine". I would like to achieve something that is described here: https://help.ubuntu.com/community/SeamlessVirtualization (It means I would be able to run chosen applications on Windows and then display them locally on Linux as separate windows achieving good desktop integration). However seamless rdp is buggy and doesn't work on my machine (probably because I'm using a tiling window manager and a 64bit system). Are you aware of any other solution then rdp seamless mode? I would prefer to still use quemu because it uses cpu hardware virtualization, so different protocol/client combination would be preferable.

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• Broken web interface in WRT54G router

  - by asmo

  I flashed my WRT54G (v3) from a custom firmware to the lastest Linksys one (v4.21.1) Now the internet/LAN works fine, but the web interface (http://192.168.1.1/) shows broken pages. I tried to manually navigating to the firmware upgrade page (by entering its URL), but it is broken too and not working. I tried a 30/30/30 reset twice, but the broken web interface still shows up. I tried to flash using the tftp2.exe application, which told me that the router didn't respond to the request. I tried to flash using the Windows commandline TFTP protocol, but I don't know how to supply a password on this prococol. (there is a factory default password ("admin") which I can't remove since the web interface is broken)

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• Windows 7 wifi reports "no network access" and "no internet access" but connects in fedora

  - by rick2047

  I am running windows 7 home basic (64bit) on a Acer 5742G laptop with Atheos wifi adapter in it. Yesterday, I hiberneted my computer as I always do and up untill then the wifi was working fine. When I booted my computer up again today I started having a strange problem: It detects my wifi but after connecting to it, it keeps on oscillating between states of no network access and no internet access. I can't connect to anything (the internet or my router). I tried to reset my internet protocol stack using this fixit file. I also tried to uninstall and reinstall my network driver. Neither helped. I am using the same laptop's fedora installation right now and the wifi is working perfectly fine. Please help. Edit To add additional details, I have Microsoft Security essentials as my antivirus software and I haven't messed with the firewall or the router configurations.

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• Routing application traffic through specific interface

  - by UnicornsAndRainbows

  Hello All! First question here, so please go easy: I have a debian linux 5.0 server with two public interfaces. I would like to route outbound traffic from one instance of an application via one interface and the second instance through the second interface. There are some challenges: both instances of the application use the same protocol both instances of the application can access the entire internet (can't route based on dest network) I can't change the code of the application I don't think a typical approach to load balancing all traffic is going to work well, because there are relatively few destination servers being accessed in the outbound traffic, and all traffic would really need to be distributed pretty evenly across these relatively few servers. I could probably run two virtualized servers on the box and bind each of them to a different external ip, but I'm looking for a simpler solution, maybe using iproute or iptables? Any ideas for me? Thanks in advance - and I'm happy to answer any questions.

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• firefox, opera 'The connection was reset' on few POST method calls on Windows and Ubuntu

  - by Gopalakrishnan Subramani

  my website works well with GET method, also few POST methods. Some pages with POST method doesn't work. Some pages with POST work. For example, login page uses POST that works fine. When I post the data on webpage, firefox says "Connecting..." and finally report connection timed out error. The same behavior happens with Opera as well. However Google Chrome works fine. At the server side, I use nginx 1.2.4 with HTTPS and uwsgi for python (flask framework) app. I use geotrust certificate. The same behavior happens with Windows 7 and Ubuntu 12.04 on firefox. I tried firefox in safemode, but no luck. Set auto-detect proxy settings. no luck. Cleared all cookies. no luck Anyone help me to fix this issue? I am posting ngix config. shame on me. I use root, I know which is not advised. need to fix soon. user root; worker_processes 4; pid /var/run/nginx.pid; events { worker_connections 768; # multi_accept on; } http { ## # Basic Settings ## sendfile on; tcp_nopush on; tcp_nodelay on; keepalive_timeout 65; types_hash_max_size 2048; # server_tokens off; # server_names_hash_bucket_size 64; # server_name_in_redirect off; include /etc/nginx/mime.types; default_type application/octet-stream; ## # Logging Settings ## access_log /var/log/nginx/access.log; error_log /var/log/nginx/error.log; ## # Gzip Settings ## gzip on; gzip_disable "msie6"; # gzip_vary on; # gzip_proxied any; # gzip_comp_level 6; # gzip_buffers 16 8k; # gzip_http_version 1.1; # gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript; ## # nginx-naxsi config ## # Uncomment it if you installed nginx-naxsi ## #include /etc/nginx/naxsi_core.rules; ## # nginx-passenger config ## # Uncomment it if you installed nginx-passenger ## #passenger_root /usr; #passenger_ruby /usr/bin/ruby; ## # Virtual Host Configs ## include /etc/nginx/conf.d/*.conf; include /etc/nginx/sites-enabled/*; ssl_session_cache shared:SSL:10m; ssl_session_timeout 10m; server { listen 80; server_name www.example.com; rewrite ^(.*) https://example.com$1 permanent; } server { listen 80; server_name example.com; rewrite ^ https://$server_name$request_uri? permanent; } server { listen 443; server_name example.com; keepalive_timeout 70; ssl on; ssl_certificate /root/cc.cert; ssl_certificate_key /root/cc.key; ssl_protocols SSLv3 TLSv1 TLSv1.1 TLSv1.2; #ssl_ciphers HIGH:!aNULL:!MD5; ssl_ciphers RC4:HIGH:!aNULL:!MD5; ssl_prefer_server_ciphers on; location / { try_files $uri @app; } location @app { include uwsgi_params; uwsgi_pass unix:/tmp/uwsgi.sock; } } } #mail { # # See sample authentication script at: # # http://wiki.nginx.org/ImapAuthenticateWithApachePhpScript # # # auth_http localhost/auth.php; # # pop3_capabilities "TOP" "USER"; # # imap_capabilities "IMAP4rev1" "UIDPLUS"; # # server { # listen localhost:110; # protocol pop3; # proxy on; # } # # server { # listen localhost:143; # protocol imap; # proxy on; # } #}

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• VirtualBox Port Fowarding to Connect to PostgreSQL Database

  - by kliao

  I'm trying to connect to a PostgreSQL database hosted on a Win7 guest from a Win7 host. I've configured security in pg_hba.conf host all all 127.0.0.1/32 md5 host all all 10.0.2.15/32 md5 host all all 192.168.1.6/32 md5 and set the listen_addresses setting in postgresql.conf to '*'. I think I've set up port forwarding correctly as I see: Key: VBoxInternal/Devices/e1000/0/LUN#0/Config/win7_vm1/GuestPort, Value: 5432 Key: VBoxInternal/Devices/e1000/0/LUN#0/Config/win7_vm1/HostPort, Value: 5432 Key: VBoxInternal/Devices/e1000/0/LUN#0/Config/win7_vm1/Protocol, Value: TCP when I call getextradata. This is similar to http://serverfault.com/questions/106168/cant-connect-to-postgresql-on-virtualbox-guest but I'm not sure what I'm doing wrong. In the vbox.log file I see: 00:00:01.019 NAT: set redirect TCP host port 5432 = guest port 5432 @ 10.0.2.15 00:00:01.033 NAT: failed to redirect TCP 5432 = 5432 but I'm not sure how to fix that. Any ideas? Thanks.

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• Windows 7 connect to Lion file sharing

  - by Automaton

  Trying to access my Mac from a Windows 7 computer, I fail with the infamous error 86 incorrect password. Now this appears to be a well-known problem with countless threads on the internet giving as many "solutions" as there are discussion threads about it (mostly ranging from installing third-party commercial samba servers, to switching to some other protocol, to compiling a plain-vanilla Samba installation - the latter which I will probably do when I give up this :) ) I am stubborn, and I believe there must be some problem here that can be solved or worked around, but there is surprisingly little detail about this problem. It appears to have something to do with a mismatch of authentication methods. Trying to run samba in debug mode: sudo /usr/sbin/smbd -debug -stdout gets me this output when trying to access it from Win 7 ... smb1_dispatch_one [smb_dispatch.cpp:377] dispatching SMB_COM_SESSION_SETUP_ANDX smb1_dispatch_session_setup [session_setup.cpp:261] FIXME erase existing sessions log_gss_error [gssapi_mechanism.cpp:97] gssapi: gss-code: Miscellaneous failure (see text) log_gss_error [gssapi_mechanism.cpp:113] gssapi: mech-code: unknown mech-code 22 for mech unknown What is the problem here, and how do I fix it?

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• rsync to cifs mount but preserve permissions

  - by weberwithoneb

  I'm backing up a linux server to a windows share. I'm currently mounting the windows share with cifs and using rsync for incremental backups. File permissions and ownership are not being preserved, as should be expected after reading this samba document: The core CIFS protocol does not provide unix ownership information or mode for files and directories. Because of this, files and directories will generally appear to be owned by whatever values the uid= or gid= options are set, and will have permissions set to the default file_mode and dir_mode for the mount. How can I achieve my goal of preserving unix file permissions while writing to a windows share? Is there another network file system that would allow me to do this? Thanks.

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• Filtering serial port io

  - by mr odus

  I am currently working on a project where I communicate with hardware via a com port on its respective pc(win xp or 7) It is a fairly large project and sifting through the log file can be a bit of pain. This is my current setup. I use putty to do the actual serial communication, and write it to a log file. Then using MinGW Msys I filter it using tail -f "puttyLog" | grep -i "search term" Is there a better way to do this? I mean specifically filtering the input in realtime. Not that mine is terrible, but it still involves having to read from a log and sometimes there have been hangups where it will be delayed for a minute or 2. I have used software in the past with a main io window and then internal filter panels, but can no longer remember or find it.

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• IPSec on Domain Controllers and Trusted Domains

  - by OneLogicalMyth

  I am looking at configuring IPSec as follows: Isolation Request authentication for inbound and outbound connections Computer and user (Kerberos V5) I am looking to do a blanket deployment across all servers and domain controllers. Workstations I will leave as not set. What impact in terms of the domain controllers with the 2-way forest trust do think I would see? Should I exclude the IP addresses of the trusted domain controllers? I don't want to stop communication between the current and trusted forest, however I do want IPsec to be used within the current forest on all servers. The trusted forest is running 2008 R2 and the current forest is 2012 R2.

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• where is this SFP problem occuring

  - by Saif Khan

  Hi, Inbound mail to a specific user is been forwarded to his external mailbox at another domain. Add mails are routed correctly with the exception of one domain. When mail are sent to users of my domain, including that user, the mails are delivered to everyone except him...as the mail admin I am getting the message The following recipient(s) cannot be reached: usermailbox on 1/10/2011 1:27 PM There was a SMTP communication problem with the recipient's email server. Please contact your system administrator. email.speedimpex.com #5.5.0 smtp;587 [email protected] sender domain does not match SPF records I am sure this has nothing to do with my mail server, however, can someone confirm?

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• Windows XP/Firewall -- Can't open UDP port 9100 for JetDirect sharing

  - by Barton Chittenden

  I'm setting up my Dad's laptop (Vista) to print to an HP Deskjet printer attached to a Windows XP Desktop box. The XP box is running Windows firewall. Laptop sits on 192.168.1.66, Desktop 192.168.1.65. I set up logging in the firewall, and determined that it is dropping inbound packets on TCP port 9100, used by JetDirect, the printing protocol. I set up an exception on TCP port 9100, allowing access to the local subnet. There's also an entry under the 'allow applications' tab which was marked for the exact printer model. I selected this as well, then tried to print again... I see more dropped packets from 192.168.1.66 to 192.168.1.65 for TCP port 9100. What do I try next?

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• How to troubleshoot slow powerconnect 62xx management interface

  - by Hannes

  Our Dell Powerconnect 62xx switches have a very high packetloss on the management interface. I presume this is caused by a new appliance which uses multicast for communication but I am not sure. Our network setup is following: servers a - Dell PC6248 | servers b - Dell PC6248 |- juniper core router servers c - Dell PC6248 | What we see is that the multicast traffic arrives at all servers (but only the servers b use the multicast) and I fear that this multicast traffic floods the switch management interface. The switches' management interfaces are reachable via vlan101, all other traffic is sent over other vlans. When I tcpdump on one of the 2 servers with a vlan 101 ip address, I only get a few arp requests but almost nothing. When I try to ping between these 2 servers, it works like a charm. I would like to know what a good way is to troubleshoot this problem and maybe help me understand what is going wrong on that subnet.

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• Have Ubuntu 9.10 desktop, just got Macbook Pro. Share over Samba, NFS, other?

  - by miamisoftware

  Hi everyone. As the title says, I have and love my Ubuntu 9.10 desktop (use it for programming). Just got a Macbook Pro (Snow Leopard) and stuff like Documents, etc, trying to figure out easiest way to share my Ubuntu desktop with my Macbook Pro. Should I use Samba or NFS and is it easy to configure one (or something else) for only in network access (192.168.1.x). It took me about 2 days to find/setup Macfuse and Macfusion for sshfs to the Fedora web server and I'm hoping there's something much easier for this in network access. But if it requires or is suggested I go ssh, I can do that. Are there any security problems with either Samba or NFS - don't know much about AFP-Apple protocol so I've not brought it up. Thanks in advance.

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• Tomcat "connection interrupted" with ssl

  - by Mike Thomsen

  I can access Tomcat on port 8080, but not on 8443. When I try o get there, this is the error I get in Firefox: The connection was interrupted The connection to the.fqdn.com:8443 was interrupted while the page was loading. This is my connector: <Connector port="8443" protocol="org.apache.coyote.http11.Http11NioProtocol" SSLEnabled="true" maxThreads="150" scheme="https" secure="true" clientAuth="want" sslProtocol="TLS" keystoreFile="C:\temp\keystore.jks" keystorePass="changeit"/> I have the CA key in the jre's cacerts file. The server cert was generated using EJBCA and should be signed properly. Any suggestions on what is going on?

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• Minimalistic flatfile-based "wall" PHP app with authentication and RSS?

  - by Nicolas Raoul

  I am looking for an open-source minimalistic "message board" PHP software. Not a forum, more something like one simple facebook wall. The only thing a user can do is post a new message. With RSS, and able to run on flat files (no database) with Apache+PHP Authentication based on a configuration file, no management UI needed. For now I use this software, but it lacks RSS: http://nrw.free.fr/data/projects/pano/demo/index.php?pano=ifc Anyone knows a software that matches my description? Thanks! Usage: communication between my family's 5 members living on different continents.

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• Improve performance on Lync desktop sharing

  - by Trikks

  I'm using Lync 2010 server to handle some clients communication and screen sharing. The biggest issue is the performance with screen sharing, it is of rather high quality but the frame rate is very poor. I have been reading and searching a lot on the subject and 95% of all topics is about bandwidth, we have a 200/200 MBit Internet connection solely for this application. Also my test machines runs on an internal gigabit lan. The speeds between all boxes is hysterically fast. Next step was to ensure that there where some profiles for different bandwidths, so i registered some New-CsNetworkBandwidthPolicyProfile -Identity 50Mb_Link -Description "BW profile for 50Mb links" -AudioBWLimit 20000 -AudioBWSessionLimit 200 -VideoBWLimit 14000 -VideoBWSessionLimit 700 New-CsNetworkBandwidthPolicyProfile -Identity 100Mb_Link -Description "BW profile for 100Mb links" -AudioBWLimit 30000 -AudioBWSessionLimit 300 -VideoBWLimit 25000 -VideoBWSessionLimit 1500 Nothing fancy happend here either. Non of the test boxes have anything from Norton installed, they doesn't have any firewalls running (nor does the Lync server), all fences are down in this environment just for the testing. Is there any thing that I may have missed to improve the quality of this? Thanks

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• How do I set my router up to authenticate with my service provider?

  - by João Lourenço

  Currently I have this setup: D-Link DSL2640U connected to the phone line: VPI/VCI 0/40, Service Category UBR Without PCR Service pppoe_0_40_3 Interface nas_0_40 Protocol Bridging (LLC/SNAP-Bridging) 802.11q not enabled Bridge Service Enabled Computers have individual PPPoE connections (in Network and Sharing Centre - Set up a new connection or network - Connect to the Internet - Broadband (PPPoE) - Username and Password) How would I move these settings on each individual PC to the router so that all I need to do is connect to the wireless? I have been unsuccessful setting up anything other than Windows PCs on the network (I have tried Macs, iOS and Nokia SmartPhones too). Thanks for the responses in advance!

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• How to enable Jetty to support cometd/reverse ajax while let it listen to port 80?

  - by janetsmith

  I would like to use cometd / reverse ajax capability of Jetty 7. I tried to configure it so it listen to port 80, instead of 8080. However, according to http://jetty.mortbay.org/jetty5/faq/faq%5Fs%5F200-General%5Ft%5Fapache.html , Apache can be configured as a HTTP/1.1 proxy to pass selected request to the Jetty using the HTTP/1.1 protocol. This is simple to configure and use, but current versions of the apache mod_proxy do not support persistent connections. As far as I know, the reverse ajax in jetty is depending on continuation (I guess it is persistent connection). So how to let jetty support reverse ajax, while coexist with apache server? Thanks.

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• Rsync : execute permission required

  - by user651488

  I'm using rsync between two servers to transfer files. The problem is some files are not transferred. I get this error : rsync: readlink "/var/www/index.html" failed: Permission denied (13) So I check permissions on the server and after make tests, I notice a file is transferred only if it has these permissions : R-W ! If the file have these permissions : R--, Rsync can't download it !? Command: /usr/bin/rsync -avzr -e "/usr/bin/ssh -i /home/replication/thishost-rsync-key" [email protected]:/var/www/index.html ./ Is it a bug with Rsync ? I find any information about this problem. Thanks for your help Debian Etch 2.6.30 Rsync 2.6.9 protocol version 29

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• How to determine what program send the packet recorded in Wireshark?

  - by Tono Nam

  I was taking some tutorials on Wireshark in order to analyze the packets sent and received when talking to a web server for purposes of learning. When I start listening/recording packets in Wireshark, there where so many packages being recorded (700 packages per minute). Is it normal to have that much traffic if I have all the programs that will cause traffic such as all browsers, log me in, dropbox, goto meeting, etc., closed? In order to try to solve the problem I am analyzing random packets. Take for instance this filter: I just selected a random IP: 74.125.130.99. So how can I know from what program those packets where created? Also how can I get more info about that communication bwtween my computer (192.168.0.139) and that server (74.125.130.99)? I just selected a random IP from the Wireshark capture. There are also other IPs that I have no idea why they are communicating with my computer. How can I figure that out?

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• Alternatives to Crashplan for VPS?

  - by Chloe

  I use SFTP Net Drive to mount a remote VPS so I can back it up. However, it's taken over 3+ days to scan! I ran 'ls -lR' from my desktop over the mounted network drive and it only took about 5m to list all the files! There are only about 5000 files and 2 GB. I know Crashplan can run headless on the VPS itself, but that sounds like a pain to set up, and it takes so much memory on the server. The VPS doesn't have a lot of memory to spare - it's less than my desktop. Is there another program that can communicate with a Crashplan backup protocol and has a command line interface? backup /home

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• How does pptpd (poptop) or pppd work with eap-tls and mppe-128?

  - by Henk

  To create a VPN I've installed pptpd on an Ubuntu domU (Debian domUs can also be created). MSCHAPv2 isn't a very strong authentication protocol so I'd like to use EAP-TLS. I've set up a FreeRADIUS server and certificates for EAP-TLS before (for use with WPA), and I've also set up a pptp server with mschap-v2 auth, but I can't figure out how to combine the two. Maybe pppd can use EAP-TLS on its own, but I can't find support for it in the Ubuntu package. If I need to patch the package, that's fine, I know how to patch Debian packages (provided the patch applies cleanly). Also, can MPPE still be used when pppd is configured to use EAP? Because it says in the manual several times that MPPE requires MSCHAP. However, other docs like this one: http://www.nikhef.nl/~janjust/ppp/ seem to refute that. The clients are running Mac OS X Leopard and GNU/Linux, there's no need to fix anything for Windows.

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• Is there an easy way to always redirect facebook.com to facebook.com/events/list (Firefox, Osx)

  - by Tor Thommesen

  I often use facebook for communication while working. When I do, I'd rather not see the facebook newsfeed. Unfortunately it's hard to remember to not go to the frontpage and use facebook.com/messages or facebook.com/events. Is there any way to always redirect from the url https://www.facebook.com/ to https://www.facebook.com/events/list? I use firefox on osx. I have tried the redirector addon and I'm not able to make it work, not sure if I'm missing something obvious or if it's outdated/buggy.

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