Search Results

Search found 6753 results on 271 pages for 'forward declaration'.

Page 127/271 | < Previous Page | 123 124 125 126 127 128 129 130 131 132 133 134 | Next Page >

Trying to understand why VLANs need to be created on intermediate switches

- by Jon Reeves

I'm currently studying for the Cisco switching exam and having trouble understanding exactly how 802.1q tagging works. Given three daisy chained switches (A,B, and C) with trunk ports between them and VLAN 101 defined on both end switches (A and C), I'm not sure why the VLAN also needs to be defined on the middle one (B)? Note that I am not disputing that it does need to be configured, I'm just trying to understand why exactly. As I understand it, traffic from VLAN 101 on switch A will be tagged as it goes through the trunk to switch B. According to the documentation I have read, trunks will pass all VLANs by default, and the .1q tag is only removed when the frame leaves through an access port on the relevant VLAN. From this I would expect switch B to simply forward the tagged frame unchanged through the trunk to switch C. Can anyone shed some light on how switch B processes this frame and why it does not get forwarded through the other trunk ?

Read the article
Move flag for follow of a specific color to a folder in Outlook 2003

- by Campo

I have a user request to be able to create a rule that would move an email in outlook 2003 that the user flagged for follow up to a specific folder. That seemed simple enough till he requested that depending on the flag color they were to be moved to a specific folder. Issue is that in outlook 2003 that's not an option when creating a rule. I know that this is very straight forward in outlook 2007 and 2010 and using the categories feature is very convenient as it displays as a list when you right click.... Though in 2003 categories are not so convenient. as an example the user will flag for follow up as so... Red Flag for sales Blue Flag for requests Green Flag for personal They want a rule that will move all items with a red flag to the sales folder, Green flag to the requests folder and so on.... Thank you for your suggestions.

Read the article
Why is Safari on my computer rendering all of the colors -- not just for images -- incorrectly?

- by richardhenry

I’m not just talking about image color profile issues; every single color that the browser renders is incorrect. It’s like it’s in it’s own color space (or something!). Screenshot: http://drp.ly/DJk1O (Opera, Safari, Chrome, Firefox) Spot the odd one out? Open this up in Photoshop or similar and try using the eyedropper to select the colour. Safari renders the same hex color completely differently. That color is set using a background-color declaration in CSS, so it should be identical in all four of those browsers. Here’s the HTML I was using: <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>untitled</title> <style type="text/css"> body { background-color: #114742; } </style> </head> <body> </body> </html> Literally every website I’m viewing with my install of Safari is displaying colors incorrectly. The blue of the bar on Facebook is slightly less rich. This doesn’t occur on any other Macs I’ve tried. Any idea what’s happened to my Safari install?

Read the article
Strange port forwarding problem

- by rAyt

I've got a strange port forwarding problem. The port forwarding to my internal webserver (10.0.0.10 on Port 80) works without a problem but the port forwarding to a windows server (10.0.0.15) on port 3389 doesn't work. The port 3389 is open. Any ideas? thanks! #!/bin/sh IPTABLES="/sbin/iptables" $IPTABLES --flush $IPTABLES --table nat --flush $IPTABLES --delete-chain $IPTABLES --table nat --append POSTROUTING --out-interface eth0 -j MASQUERADE $IPTABLES -t nat -A PREROUTING -p tcp -i eth0 -d 188.40.XXX.XXX --dport 3389 -j DNAT --to 10.0.0.15:3389 $IPTABLES -t nat -A PREROUTING -p tcp -i eth0 -d 188.40.XXX.XXX --dport 80 -j DNAT --to 10.0.0.10:80 $IPTABLES -t nat -A PREROUTING -p tcp -i eth0 -d 188.40.XXX.XXX --dport 222 -j DNAT --to 10.0.0.10:22 $IPTABLES --append FORWARD --in-interface eth1 -j ACCEPT

Read the article
Force local IP traffic to an external interface

- by calandoa

I have a machine with several interfaces that I can configure as I want, for instance: eth1: 192.168.1.1 eth2: 192.168.2.2 I would like to be able to forward all the traffic to one of these local address trhough the other interface. For instance, all requests to an iperf, ftp, http server at 192.168.1.1 are not just routed internally, but forwarded through eth2 (and the external network will take care of re-routing the packet to eth1). I tried and looked at several commands, like iptables, ip route, etc... but nothing worked. The closest behavior I could get was done with: ip route change to 192.168.1.1/24 dev eth2 which send all 192.168.1.x on eth2, except for 192.168.1.1 which is still routed internally. The goal of this setup is to do interface driver testing without using two PCs. I am using Linux, but if you know how to do that with Windows, I'll buy it!

Read the article
Unable to access internal network through PfSense WAN port

- by Sean

Our branch office is unable to connect to our internal network for some reason. However we can connect to the branch office domain controller from behind PfSense. The following is our setup: |Branch DC - 192.168.0.101 | |Branch Firewall - 192.168.0.2 | |(Internet) | |Local Firewall - 192.168.3.1 | |PFSense WAN port - 192.168.3.100 |PFSense LAN port - 192.168.1.1 | | DC1 - 192.168.1.2|DC2 - 192.168.1.4 Branch DC can ping and connect to PFSense WebGUI on the WAN port successfully (we set this up using the PfSense documentation). DC1 and DC2 can connect outbound to the Branch DC. There seems to be a rule that prevents internal access on the WAN port. However our rules are set to allow all traffic on the LAN and WAN ports. It would be ideal to just disable the firewall altogether since we already have a firewall but when we do this, PfSense doesn't allow any internal traffic at all. I look forward to any assistance and thank you ahead of time.

Read the article
How to reverse-i-search back and forth?

- by m-ric

I use reverse-i-search often, and that's cool. Sometime though when pressing Ctrl+r multiple times, I pass the command I am actually looking for. Because Ctrl+r searches backward in history, from newest to oldest, I have to: cancel, search again and stop exactly at the command, without passing it. While in reverse-i-search prompt, is it possible to search forward, i.e. from where I stand to newest. I naively tried Ctrl+shift+r, no luck. I heard about Ctrl+g but this is not what I am expecting here. Anyone has an idea?

Read the article
How can email possibly be routed to the right place with no to: address?

- by agent154

I'm no novice on networking technology, but one thing I don't really know much about in detail is email and headers. How does email work SPECIFICALLY? I'm getting spam in my hotmail inbox when I've made painful attempts to not give out my actual email. I use my own domain name to forward email to my inbox using several aliases. Yet now I'm getting spam with no address in the to: line, or also "undisclosed recipients". Looking at the headers is of no help whatsoever. So from a technical standpoint, I have to wonder... if I send an email to a certain address in my personal domain and it gets forwarded to my hotmail account, how does hotmail know what inbox to dump the message in if that address is not listed in the headers?

Read the article
Setting up MySQL database replication [without restarting mysql]

- by FunkyChicken

I'm trying to setup MySQL db replication, it seems pretty straight forward. I was using this tutorial: http://www.howtoforge.com/mysql_database_replication Now I run a rather large MySQL database for a very large website, and in this tutorial it asks me to restart MySQL to apply the new settings in the /etc/my.cnf file. I'm try to avoid that step at all costs, as I know that restarting MySQL can take a few minutes on my machine (due to large logs/dbs), and I don't want any downtime. Is there a way to apply the necessary settings WITHOUT fully restarting Mysql?

Read the article
DNS Provider/Domain Registrar

- by Arcath

I have a whole bunch of domains with my current web host and when i got the package i got it with a few gig of web space and a bunch of mysql databases but times have changed and now and i don't use the hosting im paying for, and i just my host as a DNS server to forward everything else where. The process of removing the host is going to require me to transfer all the domains to another package etc... which is going to cause disruption so my question is: Who is the best provider for DNS only? I don't want any space or mail just someone to hold the domains and let me set any DNS options I want (A/MX/CNAME records for everything, even possibly the ability to point my domains at my own DNS server).

Read the article
Windows Server 2008 R2 DNS Server Intermittently Unresponsive

- by Ablue

Throughout the day out DNS servers (2x Win 2k8 R2 servers) are unable to respond to requests. The requests that fail are all on the .root zone that are either cached or obtained from 1 of 5 DNS servers we forward to before going to root hints. At first I thought the DNS servers we were forwarding to were flaky. So I added some more in. Currently the forwarding list looks like ISP DNS 1 OPEN DNS 1 ISP DNS 2 OPEN DNS 2 ISP DNS 3 I have tried: Turning off root hints. Set record scavenging to 7 days. Using dnscmd /config /EnableEDNSProbes 0 as per this. Packet capture at the DNS server shows that there is a lot of query responses with server failure between lan clients and the local dns server; it does not appear to be forwarding those requests. So maybe a problem with caching? Anyhow, does anything have anything I can try to get this working?

Read the article
Add a remote printer over ssh on OSX?

- by GradGuy

I have a printer at my office that is connected to a local network and my linux box at work can see it on the network. However, it is not visible to the outside world. I was trying to figure out a way to add it on my MacAir and so far have found two options: 1) Using ssh tunnel via CLI: cat file.pdf | ssh user@linuxbox lpr. 2) With Chrome installed on the linux box, using the Google Cloud Print service on the remote box and automator on my MacAir I can add the printer to Cmnd+p dialog box I like the first method since it does not require Chrome be installed and the second one since it allows to use Cmnd+p inside all applications. I was wondering if there is a way to combine by using automator to run the first command line script. What about port forwarding? Is it possible to forward the remote CUPS 631 port to a local port and then add the printer normally? What other methods would you recommend?

Read the article
SPAN/Port mirroring on Linksys switch

- by Bastien974

Hi all, I'm trying to deploy a Snort box in my LAN. I have a Linksys SRW248G4 and trying to configure Port mirroring so that Snort can listen everything on the network in promiscuous mode. So in ADMIN / Port Mirroring, I have 3 things: Source Port (e1,...e48, g1...g4) Type (Rx, Tx, Both) Target (e1...e48, g1...g4) Last time I played with it, I killed all traffic on the switch, I had to reboot it several times... so now I'm asking question before: Do I need to configure each Source Port (from 1 to 48) to forward to the single promiscuous port ? 48 rules !? Is that correct ? Thanks !

Read the article
Can someone explain the "use-cases" for the default munin graphs?

- by exhuma

When installing munin, it activates a default set of plugins (at least on ubuntu). Alternatively, you can simply run munin-node-configure to figure out which plugins are supported on your system. Most of these plugins plot straight-forward data. My question is not to explain the nature of the data (well... maybe for some) but what is it that you look for in these graphs? It is easy to install munin and see fancy graphs. But having the graphs and not being able to "read" them renders them totally useless. I am going to list standard plugins which are enabled by default on my system. So it's going to be a long list. For completeness, I am also going to list plugins which I think to understand and give a short explanation as to what I think it's used for. Pleas correct if I am wrong with any of them. So let me split this questions in three parts: Plugins where I don't even understand the data Plugins where I understand the data but don't know what I should look out for Plugins which I think to understand Plugins where I don't even understand the data These may contain questions that are not necessarily aimed at munin alone. Not understanding the data usually mean a gap in fundamental knowledge on operating systems/hardware.... ;) Feel free to respond with a "giyf" answer. These are plugins where I can only guess what's going on... I hardly want to look at these "guessing"... Disk IOs per device (IOs/second)What's an IO. I know it stands for input/output. But that's as far as it goes. Disk latency per device (Average IO wait)Not a clue what an "IO wait" is... IO Service TimeThis one is a huge mess, and it's near impossible to see something in the graph at all. Plugins where I understand the data but don't know what I should look out for IOStat (blocks/second read/written)I assume, the thing to look out for in here are spikes? Which would mean that the device is in heavy use? Available entropy (bytes)I assume that this is important for random number generation? Why would I graph this? So far the value has always been near constant. VMStat (running/I/O sleep processes)What's the difference between this one and the "processes" graph? Both show running/sleeping processes, whereas the "Processes" graph seems to have more details. Disk throughput per device (bytes/second read/written) What's thedifference between this one and the "IOStat" graph? inode table usageWhat should I look for in this graph? Plugins which I think to understand I'll be guessing some things here... correct me if I am wrong. Disk usage in percent (percent)How much disk space is used/remaining. As this is approaching 100%, you should consider cleaning up or extend the partition. This is extremely important for the root partition. Firewall Throughput (packets/second)The number of packets passing through the firewall. If this is spiking for a longer period of time, it could be a sign of a DOS attack (or we are simply recieving a large file). It can also give you an idea about your firewall performance. If it's levelling out and you need more "power" you should consider load balancing. If it's levelling out and see a correlation with your CPU load, it could also mean that your hardware is not fast enough. Correlations with disk usage could point to excessive LOG targets in you FW config. eth0 errors (packets in/out)Network errors. If this value is increasing, it could be a sign of faulty hardware. eth0 traffic (bits/second in/out)Raw network traffic. This should correlate with Firewall throughput. number of threadsAn ever-increasing value might point to a process not properly closing threads. Investigate! processesBreakdown of active processes (including sleeping). A quick spike in here might point to a fork-bomb. A slowly, but ever-increasing value might point to an application spawning sub-processes but not properly closing them. Investigate using ps faux. process priorityThis shows the distribution of process priorities. Having only high-priority processes is not of much use. Consider de-prioritizing some. cpu usageFairly straight-forward. If this is spiking, you may have an attack going on, or a process is hogging the CPU. Idf it's slowly increasing and approaching max in normal operations, you should consider upgrading your hardware (or load-balancing). file table usageNumber of actively open files. If this is reaching max, you may have a process opening, but not properly releasing files. load averageShows an summarized value for the system load. Should correlate with CPU usage. Increasing values can come from a number of sources. Look for correlations with other graphs. memory usageA graphical representation of you memory. As long as you have a lot of unused+cache+buffers you are fine. swap in/outShows the activity on your swap partition. This should always be 0. If you see activity on this, you should add more memory to your machine!

Read the article
Two Routers - 1 Port Straight to First Router

- by apples

At my house we have two Wifi routers one's connected directly to the modem and the other is plugged in down stairs as a second network(Directly connected to the first router) Is there a way that I could make it so that I have the second router have its own network, but have one or two ports that would act as if they were directly connected to the first router? That way I can port forward to devices on the second router. Here are the information about the routers: Router 1 - Linksys WRT54G Running stock firmware Router 2 - Linksys E900 Running Tomato Firmware So to summarize what I'm asking is how would I have two networks from two routers but be able to connect directly to the first router through one of the ports on the second router. Here's a Visio Drawing of what I would like to look like

Read the article
Configuring NAT and static IP on Cisco 877W

- by David M Williams

Hi all, I'm having trouble setting up a static IP reservation on a network. What I want to do is assign IP 192.168.1.105 to MAC address 00:21:5d:2f:58:04 and then port forward 35394 to it. If it helps, output from show ver says Cisco IOS software, C870 software (C870-ADVSECURITYK9-M), version 12.4(4)T7, release software (fc1) ROM: System bootstrap, version 12.3(8r)YI4, release software I have done this - service dhcp ip routing ip dhcp excluded-address 192.168.1.1 192.168.1.99 ip dhcp excluded-address 192.168.1.200 192.168.1.255 ip dhcp pool ClientDHCP network 192.168.1.0 255.255.255.0 default-router 192.168.1.1 dns-server 192.168.1.1 lease 7 ip dhcp pool NEO host 192.168.1.105 255.255.255.0 hardware-address 0021.5D2F.5804 ip nat inside source static tcp 192.168.1.105 35394 <PUBLIC_IP> 35394 extendable However, the machine is getting assigned IP address 192.168.1.101 not .105 ... any suggestions? Thanks !

Read the article
Problems installing Ruby 1.9.2 and rvm on Debian Lenny

- by Dave Everitt

I have currently have Ruby 1.9.1 (bad) and want to install 1.9.3 under rvm. However, rvm requirements gives a long list: install build-essential openssl libreadline6 libreadline6-dev curl git-core zlib1g zlib1g-dev libssl-dev libyaml-dev libsqlite3-dev sqlite3 libxml2-dev libxslt-dev autoconf libc6-dev ncurses-dev automake libtool bison subversion But I've hit a problem here: /# apt-get install libreadline6 Reading package lists... Done Building dependency tree Reading state information... Done E: Couldn't find package libreadline6 ...and (I imagine after just hunting down a Debian source to download curl) finding these packages isn't going to be a picnic. Given that there are few packages to install before I can get rvm to install Ruby 1.9.3, what's a good way forward? My sources.list: deb http://archive.debian.org/debian/ lenny main contrib

Read the article
How to make Outlook always show the full email id of a forwarded mail

- by Firee

Am currently using Outlook 2013. Several times, when a mail is forwarded to me, i only see the First/Last name of the person in the forwarded mail, not the email id. Is there a way to make Outlook always display the email id. I get these mails from people, who are also using Outlook but different versions. One solution which we have to resort to, is to attach the mail, rather than forward, that way it retains the email address, but this is cumbersome, and I cannot ask everyone to do this. This is similar to this question, but the answer selected does not work for me.

Read the article
Stunnel too many clients

- by davidsmalley

I'm trying to hook up stunnel and haproxy to forward https connections through to some backend servers. I've got haproxy setup right, and I seem to have stunnel set up right. Trouble is that when I hit the setup with a load test after a while I start to see these log entries: 2010.05.05 11:24:43 LOG7[3498:3086792368]: https accepted FD=512 from 10.195.158.225:52579 2010.05.05 11:24:43 LOG4[3498:3086792368]: Connection rejected: too many clients (=500) I guess I've hit a limit somewhere but I wasn't sure how to fix it, there doesn't seem to be a config file option for stunnel to change this. Does anyone know how to configure stunnel for a potentially large number of connections?

Read the article
How to use iptables to foward outbound web traffic to a proxy?

- by jnman

I've been hitting my head for a while as to how to do this. The scenario is as follows: I want to be able to forward all outbound web traffic from a browswer to Tor so that it is properly anonymized. Normally, one could just set the http proxy in the browser and be done with it but this is with a browser without the ability to do so specifically, a mobile browser. So ideally, what could be done then is to intercept all web/dns traffic requests from the browser and send it to Tor. Assume for this, that Tor will be running on the device too.

Read the article
How can I make pref changes via defaults command happen immediately?

- by user329863

There are many changes to Finder, Dock, etc. preferences that you can do with the defaults command, i.e. defaults write com.apple.finder AppleShowAllFiles -bool yes However, in order to make the changes take effect, you must quit and relaunch the target app: osascript -e 'tell app "Finder" to quit' When the Finder is quit like this (rather than using the killall command, as some published sources advise), it saves and restores its window placements and disk locations (but not the forward-and-back history associated with each window). Is there some way to make such changes take effect immediately, without quitting the target app? After all, when you make changes in the Dock preference panel, they take effect instantly in the Dock application. Is there some Apple Event that I can send to make the change or make the app reread its prefs?

Read the article
Default virtual server does not work

- by Luc

Hello, I have 4 Name Virtual Hosts on my apache configuration, each one using proxy_http to forward request to the correct server. They work fine. <VirtualHost *:80> ServerName application_name.domain.tld ProxyRequests Off ProxyPreserveHost On ProxyPass / http://server_ip/ ProxyPassReverse / http://server_ip/ </VirtualHost> I then tried to add a default NameVirtualHost to take care of the requests for which the server name does not match one of the four others. Otherwise a request like some_weird_styff.domain.tld would be forwarded to one of the 4 VH. I then added this one: <VirtualHost *:80> ServerAlias "*" DocumentRoot /var/www/ </VirtualHost> At the beginning it seemed to work fine, but at some point it appears that the requests that should be handed by one of the 4 regular hosts is "eaten" by the default one !!! If I a2dissite this default host, everything is back to normal... I do not really understand this. If you have any clue... thanks a lot, Luc

Read the article
How to make IIS7 stop adding etag to response headers?

- by user20028

For performance reasons, I'm using expire headers for static files (adding long expiration periods like 50 years or so). Now I'm trying to get rid of etag headers which are automatically added by IIS7. I've done some searching but it seems harder than what I thought (there doesn't seem to be a straight forward way). I found some workarounds but they all use httpmodules (which I'm keeping as a last resort). I strongly prefer to not get the etag header added in the first place. Did anyone manage to do this? Thanks

Read the article
How to allow IAM users to setup their own virtual MFA devices

- by Ali

I want to let my IAM users to setup their own MFA devices, through the console, is there a single policy that I can use to achieve this? So far I can achieve this through a number of IAM policies, letting them list all mfa devices and list users (so that they can find themselves in the IAM console and ... I am basically looking for a more straight forward way of controlling this. I should add that my IAM users are trusted users, so I don't have to (although it will be quite nice) lock them down to the minimum possible, so if they can see a list of all users that is ok.

Read the article
Steps to take when technical staff leave

- by Tom O'Connor

How do you handle the departure process when privileged or technical staff resign / get fired? Do you have a checklist of things to do to ensure the continuing operation / security of the company's infrastructure? I'm trying to come up with a nice canonical list of things that my colleagues should do when I leave (I resigned a week ago, so I've got a month to tidy up and GTFO). So far I've got: Escort them off the premises Delete their email Inbox (set all mail to forward to a catch-all) Delete their SSH keys on server(s) Delete their mysql user account(s) ... So, what's next. What have I forgotten to mention, or might be similarly useful? (endnote: Why is this off-topic? I'm a systems administrator, and this concerns continuing business security, this is definitely on-topic.)

Read the article

< Previous Page | 123 124 125 126 127 128 129 130 131 132 133 134 | Next Page >