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  • Reverse Proxy FTP traffic

    - by TonyZ
    I was wondering if anyone knew of a reverse proxy server to reverse proxy ftp traffic. I would like to run many servers on ip address, but then pass the traffic to an internal server with its own ip address. Thank you for any suggestions.

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  • Restrict VPN client traffic to certain domains/IP

    - by mr-euro
    Hi Is there any way to restrict a VPN client to only route certain traffic via the VPN and the rest via their local gateway? For example: traffic to a certain IP or domain gets routed across the VPN and all other requests do not. Let me know if you need more details. Thank you.

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  • Software for measuring internet traffic?

    - by Lachlan McDonald
    I'm interested in finding a free piece of software for Windows XP & 7 that allows us to measure both incoming and outgoing internet traffic, but not traffic between users of the local network. I live in a shared household with three others, and we're interested to see which of us is using the largest amount of our monthly internet quota. We're all happy to install the necessary software. Any suggestions?

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  • Squidguard (or equivalent) for IPv6

    - by Matthew Iselin
    We have recently implemented (native) IPv6 in our network. Everything is working very well so far, but our IPv4 network passes all HTTP traffic through Squid (2.7.STABLE6 on Ubuntu Server) + SquidGuard for filtering purposes. This is all managed via a redirect rule on the firewall (via Shorewall). I'm wondering now if it's possible to do the same thing with IPv6 at all. If it's any help we're using Shorewall6 for IPv6 traffic.

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  • Capturing wireless traffic (using Wireshark).

    - by Daisetsu
    When I run wireshark on a wired network it works fine and reports all of the packets. When I run it on a wireless network though I only see my own traffic. The wireless card I have is supposed to support packet capture and go into premiscous mode, but I don't see any other system traffic. What is wrong?

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  • Identify Executable Creating Network Traffic

    - by jeffspost
    I've got some application on my Windows XP machine that is generating an HTTP request to aaronsw.com every half hour. We've trapped the packets in wireshark, but wireshark doesn't tell what application generated the packets. Is there any utility that looks at network traffic AND tells what executable produced the traffic?

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  • Capturing wirelss traffic (using Wireshark).

    - by Daisetsu
    When I run wireshark on a wired network it works fine and reports all of the packets. When I run it on a wireless network though I only see my own traffic. The wireless card I have is supposed to support packet capture and go into premiscous mode, but I don't see any other system traffic. What is wrong?

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  • How to know the source of certain TCP traffic on AIX

    - by A.Rashad
    We have two AIX boxes, one for production system and another for testing. both systems are running ATM machine switches, where the ATM device is connected via TCP socket. we had an issue on production system where the machine would power off or get disconnected but the netstat -na | grep <IP of machine > would still mention that the socket is up when simulated that case on the UAT environment, the problem did not happen, where the socket would terminate in 3 to 5 minutes. when sniffed on the traffic between the machine and ATM we found that no traffic takes place on production while there is some sort of heartbeat on UAT. but it is not initiated by the application. $>tcpdump | grep -v "10.2.2.71" | grep -v "HSRP" | grep "10.3.1.30" tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on en6, link-type 1, capture size 96 bytes 09:08:13.323421 IP server073.afs3-callback > 10.3.1.30.impera: . 278204201:278204202(1) ack 3307884029 win 164 09:08:13.335334 IP 10.3.1.30.impera > server073.afs3-callback: . ack 1 win 64180 09:08:23.425771 IP 10.3.1.30.impera > server073.afs3-callback: . 1:2(1) ack 1 win 64180 09:08:23.425789 IP server073.afs3-callback > 10.3.1.30.impera: . ack 2 win 65535 09:09:13.628985 IP server073.afs3-callback > 10.3.1.30.impera: . 0:1(1) ack 1 win 164 09:09:13.633900 IP 10.3.1.30.impera > server073.afs3-callback: . ack 1 win 64180 09:09:23.373634 IP 10.3.1.30.impera > server073.afs3-callback: . 1:2(1) ack 1 win 64180 09:09:23.373647 IP server073.afs3-callback > 10.3.1.30.impera: . ack 2 win 65535 while on production, that traffic is not there. we want to know where this traffic is initiated from to implement on production to sense disconnection our comms parameters are: tcp_keepcnt = 2 tcp_keepidle = 100 tcp_keepinit = 150 tcp_keepintvl = 150 tcp_finwait2 = 1200 can anyone help?

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  • Shorewall: temporarily drop incoming traffic except port 22?

    - by Magnetic_dud
    When I work on configuration files, especially of the mail server, I would like to temporarily drop all the incoming traffic except the port 22. So, I don't risk to lose incoming mails if I need to move the mail server to another server, or something like that. Using shorewall, how I could do that? I was thinking to create a rules file to divert all the traffic to a non-existant internal ip and switch it with the normal file when needed.

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  • Excessive Outbound DNS Traffic

    - by user1318414
    I have a VPS system which I have had for 3 years on one host without issue. Recently, the host started sending an extreme amount of outbound DNS traffic to 31.193.132.138. Due to the way that Linode responded to this, I have recently left Linode and moved to 6sync. The server was completely rebuilt on 6sync with the exception of postfix mail configurations. Currently, the daemons run are as follows: sshd nginx postfix dovecot php5-fpm (localhost only) spampd (localhost only) clamsmtpd (localhost only) Given that the server was 100% rebuilt, I can't find any serious exploits against the above stated daemons, passwords have changed, ssh keys don't even exist on the rebuild yet, etc... it seems extremely unlikely that this is a compromise which is being used to DoS the address. The provided IP is noted online as a known SPAM source. My initial assumption was that it was attempting to use my postfix server as a relay, and the bogus addresses it was providing were domains with that IP registered as their nameservers. I would imagine given my postfix configuration that DNS queries for things such as SPF information would come in with equal or greater amount than the number of attempted spam e-mails sent. Both Linode and 6Sync have said that the outbound traffic is extremely disproportionate. The following is all the information I received from Linode regarding the outbound traffic: 21:28:28.647263 IP 97.107.134.33.32775 > 31.193.132.138.53: 28720 op8+% [b2&3=0x4134] [17267a] [30550q] [28773n] [14673au][|domain] 21:28:28.647264 IP 97.107.134.33 > 31.193.132.138: udp 21:28:28.647264 IP 97.107.134.33.32775 > 31.193.132.138.53: 28720 op8+% [b2&3=0x4134] [17267a] [30550q] [28773n] [14673au][|domain] 21:28:28.647265 IP 97.107.134.33 > 31.193.132.138: udp 21:28:28.647265 IP 97.107.134.33.32775 > 31.193.132.138.53: 28720 op8+% [b2&3=0x4134] [17267a] [30550q] [28773n] [14673au][|domain] 21:28:28.647266 IP 97.107.134.33 > 31.193.132.138: udp 6sync cannot confirm whether or not the recent spike in outbound traffic was to the same IP or over DNS, but I have presumed as such. For now my server is blocking the entire 31.0.0.0/8 subnet to help deter this while I figure it out. Anyone have any idea what is going on?

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  • Use wireshark to sniff QQ traffic

    - by fizzy
    I am using a MacBook and would like to sniff QQ traffic using WireShark or other software. The intercepted traffic will be UTF-8 or unicode, not ascii. Is this possible, and is there a tutorial that explains this? QQ uses UDP and some more interesting control structures, which is why I as seeking a specialized solution.

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  • Best way to segment traffic, Vlan or subnet

    - by thebird
    We have a medium sized network of around 200 nodes and are currently in the process of replacing old daisy chained switches with stack-able or chassis style switches. Right now our network is broken up via subnet; production, management, IP, etc each on a separate subnet. Does anyone have an opinion on whether creating Vlan's instead of subnets would be more beneficial? Our general goal is to prevent bottlenecks, separate traffic for security, and to manage traffic with more ease.

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  • How to route all network traffic for vlan through a proxy server on SRX

    - by user112570
    I'm trying configure an SRX router to automatically forward all traffic through a proxy server i have in the USA. I have created a separate vlan and configured the proxy but not sure how i can route all traffic through this. The aim of this task is create a test network which makes users appear in the location of the proxy server. (with the external ip address of the proxy) Is this possible and how should i do this. Am i approaching this the right way? Thanks

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  • Mod Rewrite - directing HTTP/HTTPS traffic to the appropriate virtual hosts

    - by kce
    I have an Apache2 web server (v. 2.2.16) running on Debian hosting three virtual hosts. The first two hosts are HTTP only (server1 and server2). The last host is HTTPS only (server3). My virtual host configuration files can be found at pastebin. I would like to use mod rewrite to get the following behavior: Any request for http://server3 is re-directed to https://server3 Any request for either https://server1 or https://server2 is re-directed to http://server1 or http://server2 as appropriate. Currently, requesting http://server3 gives you a 403 because indexing is disabled for that host and a request for https://server1 or https://server2 will resolve as https://server3 (as its the only virtual host running SSL). This behavior is not desirable. So far I have added a rewrite rule to the central configuration file (myServerWideConfs.conf), with unfortunately no effect. I was under the impression that this rule (or something similar) should rewrite all https:// requests for server1 and server2 to the proper http:// request. RewriteEngine On RewriteCond %{HTTP_HOST} !^server3 [NC] RewriteRule (.*) http://%{HTTP_HOST} My question is two-fold: What mod rewrite rules should I use to accomplish this? And where should they go? Debian's packaging of Apache has a pretty granular (i.e., fractured) configuration file layout; should my rewrite rules go in /etc/apache2/apache2.conf, /etc/apache2/conf.d/myServerWideConfs.conf, or the individual virtual host files? Is mod rewrite the right tool to accomplish this or am I missing something in my greater apache configuration?

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  • Using textureGrad for anisotropic integration approximation

    - by Amxx
    I'm trying to develop a real time rendering method using real time acquired envmap (cubemap) for lightning. This implies that my envmap can change as often as every frame and I therefore cannot use any method base on precomputation of the envmap (such as convolution with BRDF...) So far my method worked well with Phong BRDF. For specular contribution I direclty read the value in my sampleCube and I use mipmap levels + linear filter for simulating the roughtness of the material considered: int size = textureSize(envmap, 0).x; float specular_level = log2(size * sqrt(3.0)) - 0.5 * log2(ns + 1); vec3 env_specular = ks * specular_color * textureLod(envmap, l_g, specular_level); From this method I would like to upgrade to a microfacet based BRDF. I already have algorithm for evaluating the shape (including anisotropic direction) of the reflection but I cannot manage to read the values I want in my sampleCube. I believe I have to use textureGrad(envmap, l_g, X, Y); with l_g being the reflection direction in global space but I cannot manage to find which values to give to X and Y in order to correctly specify the area I want to consider. What value should I give to X and Y in orther for textureGrad(envmap, l_g, X, Y); to give the same result as textureLod(envmap, l_g, specular_level);

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  • Supercharge Your Website and See Traffic Flooding at Your Door

    Thanks to your tips and tactics, my website is supercharged and I have more visitors than I can handle (of course he is able to handle), exclaimed my friend when I entered his home for the super success party that he threw. It was not long ago when after losing his job to the economic meltdown, he started an online business. Since he was still under the influence of stress, he wanted to give it all up, because initially his website remained almost obsolete.

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  • SEO for a list of products with filters

    - by dana
    I am a wondering if there is a recommended "best practice" for a product search SEO. I know to create a dynamic sitemap file that lists links to all products in the site. However, I want to implement a a bookmark-able "advanced search". Should I let search engines index any of the results? Take the following parameters for a search on a make believe used car website: minprice (minimum price in dollars) maxprice (maximum price in dollars) make (honda, audi, volvo) model (accord, A4, S40) minyear (minimum model year) maxyear (maximum model year) minmileage (minimum mileage) maxmileage (maximum mileage) Given these parameters, there could be an infinite number of search combinations: Price Between $10,000 and $20,000 /search?minprice=10000&maxprice&20000 Audis with less than 50k miles /search?model=audi&maxmileage=50000 More than 100,000 miles and less than $5,000 /search?minmileage=100000&maxprice=5000 etc. Over time, there may be inbound links to a variety of these types of searches, yet they are all slices of the same data. Should I allow for all of these searches to be indexed?

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  • Ask the Readers: How Do You Deal with Bacn?

    - by Jason Fitzpatrick
    Most people get their fair share of email they want, email they don’t want at all (Spam), and a healthy dose of Bacn–email they want but not right now. How do you deal with your daily dose of Bacn? While Spam is unsolicited garbage you don’t ever want, Bacn is email content you’ve actively selected to receive (weather updates, coupons from your favorite retailers, web site digests, etc.) that isn’t as important as email from friends and coworkers. It’s email that you want but not right now. This week we want to hear all about your methods for wrangling Bacn so you can enjoy it when you’re in the mood but it doesn’t clutter up your inbox when you aren’t. Sound off in the comments with your Bacn handling tips and then check back in on Friday for the What You Said roundup to see how your fellow readers handle things. HTG Explains: What The Windows Event Viewer Is and How You Can Use It HTG Explains: How Windows Uses The Task Scheduler for System Tasks HTG Explains: Why Do Hard Drives Show the Wrong Capacity in Windows?

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