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  • Improving VPN performance - stronger encryption = more performance?

    - by Seth
    I have a site-to-site VPN set up with two SonicWall's (a TZ170 and a Pro1260). It was suggested to me that turning off encryption (so the VPN is tunneling only) would improve performance. (I'm not concerned with security, because the VPN is running over a trusted line.) Using FTP and HTTP transfers, I measured my baseline performance at about 130±10 kB/s. The Ipsec (Phase 2) Encryption was set to 3DES, so I set it to "none". However, the effect was opposite -- the performance dropped to 60±30 kB/s, and the transfers stall for about 25 seconds before any data comes down the line. I tried AES-128 and the throughput went UP to 160±5 kB/s. The rated speed of my line is 193 kB/s (it's a T1). Contrary to what I would think, stronger Ipsec encryption seems to improve throughput. Can anyone explain what might be going on here? Why would no encryption cause poor and highly variable performance, and cause transfers to stall? Why does AES-128 improve performance?

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  • DD-WRT PPTP VPN problem

    - by Tobias Tromm
    I try to configure a DD-WRT as a PPTP client. The VPN Server is Windows Server 2003. This is my scenario: The Windows 2003 Server has set to give to the VPN Client the 10.0.0.81 fixed IP and to add a network route to the remote home. At the remote home I have changed the PPTP Options at DD-WRT to make the connection. The VPN connection is successfully established. ...and Windows successfully add the route to the remote home 192.168.2.X. From the remote home I can successfully access any computer from the VPN server side. The problem is when I try to access the remote home from the Server side. From Server side I only can access\ping DD-WRT ( by VPN Client IP - 10.0.0.81). What's wrong? How I need to do to be a site-to-site VPN? This is what happen when I try to tracert the remote home from local home.

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  • Giving VPN connections access to all locations?

    - by Jeff
    I have asked a similiar question, but didn't get any answers so i am going to try and rephrase. i have 4 locations corporate and 3 remotes when you are at the corporate location, you have full access to all networks. 192.168.3.x 192.168.2.x 192.168.1.x 192.168.0.x all locations are connected via site-to-site vpn with the corporate location. if you are at a remote location, you have access to that location & the corporate location. the corporate location handles all VPN traffic. however, when you VPN into the corporate location, you can not see outside the corporate location. can anyone provide some information or a link explaining how to allow the VPN users to see all locations? thanks static route configuration: Gateway of last resort is 207.255.x.1 to network 0.0.0.0 C 207.255.x.0 255.255.255.0 is directly connected, outside S 10.0.1.6 255.255.255.255 [1/0] via 207.255.x.1, outside S 10.0.1.5 255.255.255.255 [1/0] via 207.255.x.1, outside S 192.168.0.0 255.255.255.0 [1/0] via 192.168.0.1, inside C 192.168.1.0 255.255.255.0 is directly connected, inside S 192.168.2.0 255.255.255.0 [1/0] via 192.168.2.1, inside S 192.168.3.0 255.255.255.0 [1/0] via 192.168.3.1, inside S* 0.0.0.0 0.0.0.0 [1/0] via 207.255.x.1, outside [1/0] via 192.168.1.1, outside

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  • Clicks counting and crawler bots

    - by Dennis
    I am currently running a small affiliate-program for Facebook users. We use an auto-poster to publish links to fan pages. Every hit is stored in our database and we have included a 24 hour reload block for the IP-addresses. My problem right now is that the PHP script also stores every hit from all the bots that crawls my website. Now I was thinking to block those bots with the robots.txt of my website but I am afraid that this will have a negative effect on my AdSense ads. Does anybody have an idea for me how to work this out?

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  • VPN Client solution

    - by realtek
    I have several VPN's that I need to establish on a daily basis but from multiple workstations. What I would like to do it have either a server or vpn router that can perform this connection itself and that I can then route traffic through this device or server depending on the subnet I am trying to reach. The issue is that I only use VPN Clients to connect, so I am basically trying to achieve almost a site to site VPN but by using basically a VPN Client type connection from my network. The main VPN Client I use is the Sonicwall Global VPN Client where I initially use a Preshared Key and then it always prompts me for a username and password (not RSA key). My question is, is there any type of linux distro or even a hardware vpn router that can do this and connect to a Sonicwall device as if it were a client? I have tried pfSense which is very good but it fails to connect, probably due to a mismatch of settings. I have tried many others. Even dd-wrt on my router but it does not support whatever protocol Sonicwall uses. (I thought L2TP/IPSec) but it appears it may not be that. Any advice would be great! The other other thing I have thought of that I have not tried yet is Windows Server Routing and Remote Access but I have a feeling that won't work either. Thanks

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  • Cisco ASA 5505 site to site IPSEC VPN won't route from multiple LANs

    - by franklundy
    Hi I've set up a standard site to site VPN between 2 ASA 5505s (using the wizard in ASDM) and have the VPN working fine for traffic between Site A and Site B on the directly connected LANs. But this VPN is actually to be used for data originating on LAN subnets that are one hop away from the directly connected LANs. So actually there is another router connected to each ASA (LAN side) that then route to two completely different LAN ranges, where the clients and servers reside. At the moment, any traffic that gets to the ASA that has not originated from the directly connected LAN gets sent straight to the default gateway, and not through the VPN. I've tried adding the additional subnets to the "Protected Networks" on the VPN, but that has no effect. I have also tried adding a static route to each ASA trying to point the traffic to the other side, but again this hasn't worked. Here is the config for one of the sites. This works for traffic to/from the 192.168.144.x subnets perfectly. What I need is to be able to route traffic from 10.1.0.0/24 to 10.2.0.0/24 for example. ASA Version 8.0(3) ! hostname Site1 enable password ** encrypted names name 192.168.144.4 Site2 ! interface Vlan1 nameif inside security-level 100 ip address 192.168.144.2 255.255.255.252 ! interface Vlan2 nameif outside security-level 0 ip address 10.78.254.70 255.255.255.252 (this is a private WAN circuit) ! interface Ethernet0/0 switchport access vlan 2 ! interface Ethernet0/1 ! interface Ethernet0/2 ! interface Ethernet0/3 ! interface Ethernet0/4 ! interface Ethernet0/5 ! interface Ethernet0/6 ! interface Ethernet0/7 ! passwd ** encrypted ftp mode passive access-list inside_access_in extended permit ip any any access-list outside_access_in extended permit icmp any any echo-reply access-list outside_1_cryptomap extended permit ip 192.168.144.0 255.255.255.252 Site2 255.255.255.252 access-list inside_nat0_outbound extended permit ip 192.168.144.0 255.255.255.252 Site2 255.255.255.252 pager lines 24 logging enable logging asdm informational mtu inside 1500 mtu outside 1500 icmp unreachable rate-limit 1 burst-size 1 asdm image disk0:/asdm-603.bin no asdm history enable arp timeout 14400 global (outside) 1 interface nat (inside) 0 access-list inside_nat0_outbound nat (inside) 1 0.0.0.0 0.0.0.0 access-group inside_access_in in interface inside access-group outside_access_in in interface outside route outside 0.0.0.0 0.0.0.0 10.78.254.69 1 timeout xlate 3:00:00 timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02 timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00 timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00 timeout uauth 0:05:00 absolute dynamic-access-policy-record DfltAccessPolicy aaa authentication ssh console LOCAL http server enable http 0.0.0.0 0.0.0.0 outside http 192.168.1.0 255.255.255.0 inside no snmp-server location no snmp-server contact snmp-server enable traps snmp authentication linkup linkdown coldstart crypto ipsec transform-set ESP-3DES-SHA esp-3des esp-sha-hmac crypto map outside_map 1 match address outside_1_cryptomap crypto map outside_map 1 set pfs crypto map outside_map 1 set peer 10.78.254.66 crypto map outside_map 1 set transform-set ESP-3DES-SHA crypto map outside_map interface outside crypto isakmp enable outside crypto isakmp policy 10 authentication pre-share encryption 3des hash sha group 2 lifetime 86400 no crypto isakmp nat-traversal telnet timeout 5 ssh 0.0.0.0 0.0.0.0 outside ssh timeout 5 console timeout 0 management-access inside threat-detection basic-threat threat-detection statistics port threat-detection statistics protocol threat-detection statistics access-list group-policy DfltGrpPolicy attributes vpn-idle-timeout none username enadmin password * encrypted privilege 15 tunnel-group 10.78.254.66 type ipsec-l2l tunnel-group 10.78.254.66 ipsec-attributes pre-shared-key * ! ! prompt hostname context

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  • How to route all traffic over site to site VPN tunnel?

    - by Hutch
    I have a site to site VPN configured between our main site (Site A) and a remote site (Site B). Site A is 10.60.0.0/16 Site B is 192.168.99.0/24 The firewall in Site B is a Juniper SSG running ScreenOS 6.3 and I'm using a route based VPN. The tunnel works perfectly in that from Site A you can reach 192.168.99.0 via the tunnel, and from Site B you can reach 10.60.0.0 via the tunnel. However, we want it so that if you're in Site B and want the Internet it goes via the firewall at Site A, and right now on the Juniper 0.0.0.0 has the ISP router as next hop. My understanding is that on the Juniper, I can set a route for the /32 public IP at our main site that the VPN tunnel connects to to the ISP router via ethernet0/0 (the SSG's external interface), and then modify the 0.0.0.0 route to use our main site firewall via tunnel.1 (the VPN tunnel). Not sure I've explained that so well but is my understanding correct? Thanks

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  • How do web crawlers affect site statistics?

    - by LM
    What are ways in which web crawlers (both from search engines and non-search engines) could affect site statistics (e.g., when doing AB-testing different page variations)? And what are ways to take care of these problems? For example: Do a lot of people writing web crawlers often delete their cookies and mask their IPs, so that web crawlers often show up as different users each time they crawl the site? What are heuristics to use to recognize that something is a bot? (I'm guessing any sophisticated enough bot can be indistinguishable from a real user, if it wants to -- is this correct?)

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  • SEO on site temporarily redirected, then re-enabled

    - by tferdo
    I have a site which was performing well in the search engines - I wanted to redevelop the site, so in the interim period I set up a redirect from my site to my parent company's site (which has a small section relating to my services). Fairly quickly, this section of the parent site inherited my seo ranking, backlinks etc, which is fine and is what I expected. However, I now have a new site ready and plan to remove the redirect - do you know how this is likely to affect my site? Many thanks

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  • Can't access a local site site on LAN

    - by Dilawar
    I have lighttpd setup on a machine (say ip is 10.107.105.13) with following details. inet addr : 10.107.105.13 Bcast : 10.107.111.255 Mask : 255.255.240.0 I can access my site on this computer by using firefox http://localhost/index.html. Now I am trying to access this site from another computer with following details inet addr : 10.14.42.7 Bcast : 10.14.42.255 Mask : 255.255.255.0 But it says 'access denied'. nmap 10.107.105.13 gives the following output. PORT STATE SERVICE 22/tcp open ssh 80/tcp open http 1234/tcp open hotline 3306/tcp open mysql 9418/tcp open git Following is the output of iptables -L -n -v on 10.107.105.13 141 11207 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:80 0 0 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:80 FORWARD and OUTPUT section empty. What is wrong with all this?

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  • Sonicwall site-to-site can not access remote network

    - by vpnwizard
    I have 2 SonicWall devices (tz100) in 2 different geographical locations. They are connected to each other using site-to-site vpn connection and this works just great. Device A network - 192.168.1.0/24 Device B network - 192.168.2.0/24 When I connect to one device, I can access, from my computer, anything on that specific subnet. However, I am unable to view anything, from my computer, on the other network. Is there a setting somewhere that will forward my requests to the other subnet? Example - I VPN into Device A, but would like to get to a server which is on the Device B network (192.168.2.0/24)

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  • Site-to-site VPN

    - by ronadona
    We are a small business company that is based in Sydney and opened a new office in London. Number of employees in Sydney office is 25 and in London is 6 employees. So the traffic isn't that high. Files to be transferred are Excel sheets with size of 15mb max. Both locations have MS server 2008 and Fortigate gateways. I set up a site to site vpn but it's extremely slow. Maybe this is because our upload speeds is 1Mbps only but We will increase the upload speed to 20 Mbps in both locations but I am afraid that this will not solve the problem as the 2 locations are far from each other and the upload upgrade won't solve the problem. what's the best way to go? Shall we find a provider for the VPN? or is there another technology that can be used through internet without paying extra costs? Many thanks!

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  • Sonicwall site-to-site can not access remote network

    - by vpnwizard
    I have 2 SonicWall devices (tz100) in 2 different geographical locations. They are connected to each other using site-to-site vpn connection and this works just great. Device A network - 192.168.1.0/24 Device B network - 192.168.2.0/24 When I connect to one device, I can access, from my computer, anything on that specific subnet. However, I am unable to view anything, from my computer, on the other network. Is there a setting somewhere that will forward my requests to the other subnet? Example - I VPN into Device A, but would like to get to a server which is on the Device B network (192.168.2.0/24)

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  • do I need to create an AD site for VPN network

    - by ykyri
    I have Windows Domain level 2008 R2. There are four GC DC in four different physical locations. I have Kerio-based VPN network for replication and remote administration. Here is how network configured: dc1: local IP: 192.168.0.10 VPN IP: 192.168.1.10 dc2: local IP: 10.10.8.11 VPN IP: 192.168.1.11 dc3: local IP: 10.10.9.12 VPN IP: 192.168.1.12 dc4: local IP: 10.10.10.13 VPN IP: 192.168.1.13 That's simple, replication and all works fine but when running dcdiag on dc3 I have an error: A warning event occurred. EventID: 0x000016AF During the past 4.12 hours there have been 216 connections to this Domain Controller from client machines whose IP addresses don't map to any of the existing sites in the enterprise. <...> The log(s) may contain additional unrelated debugging information. To filter out the needed information, please search for lines which contain text 'NO_CLIENT_SITE:'. The first word after this string is the client name and the second word is the client IP address. Here is netlogon.log lines example: 05/30 12:07:39 DOMAIN.NAME: NO_CLIENT_SITE: dc2 192.168.1.11 05/31 09:52:11 DOMAIN.NAME: NO_CLIENT_SITE: dc4 192.168.1.13 05/31 19:49:31 DOMAIN.NAME: NO_CLIENT_SITE: adm-note 192.168.1.101 07/01 05:16:26 DOMAIN.NAME: NO_CLIENT_SITE: dc1 192.168.1.10 All VPN-joined computers are generates same log line as above. Computer amd-note is for example administrator's notebook, also have VPN. Question is should I add new AD site and bind VPN subnet 192.168.1.0/24 with that site?

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  • How to build a web crawler to find a specific advert, which is in an iframe loaded by Javascript

    - by ZoFreX
    I'm trying to find all instances of an advert on a website. The advert is in an iframe which is loaded by javascript (it doesn't appear at all if javascript is turned off). Detecting the advert itself is extremely simple, both the name of the flash file and the target of the href always contain a certain string. What would be the best "starting point" for achieving this? At the moment I'm considering an Adobe AIR app, which could crawl the site and examine the DOM to find the ad, and would run javascript and load the content of the iframe. The other option I can think of is using Firefox as the platform (using maybe GreaseMonkey or Selenium? I don't really know how to leverage Firefox like this). Does anyone know of anything suitable to build this, or have any suggestions on using Firefox to do it? Extra details: Being CPU intensive isn't really an issue, nor is anything depending on a browser being open. This doesn't need to run on a headless server, it will be running on a powerful desktop box. OS is also not an issue. It would be advantageous if the crawler loaded each page multiple times, as the advert is in rotation. While the crawler does need to execute the javascript and load the content of the iframe, it does not need to be able to display flash files.

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  • Symantec site slow only when using a Mac?

    - by cozmokramer8
    I didn't know this was possible but it certainly seems slow when only using a Mac. I participate in the Symantec Connect forums regularly and when I get on it with my Windows PC or laptop it loads perfectly, but my Mac laptop the site rarely loads or if it does it takes a couple minutes for each page. My question is why does a website run slower on the Mac vs PC? No other sites experience this same issue just the symantec connect forums. Thanks, Grant

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  • Suggestions for a site ripper?

    - by blackrobot
    I need software that will rip a site via HTTP. It needs to download the images, HTML, CSS, and JavaScript as well as organize it in a file system. Does anyone know of software that does this? Or would I be better off just writing it myself?

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  • New AD-DC in a new Site is refusing cross-site IPv4 connections

    - by sysadmin1138
    We just added a new Server 2008 (sp2) Domain Controller in a new Site, our first such config. It's over a VPN gateway WAN (10Mbit). Unfortunately it is displaying a strange network symptom. Connections to the SMB ports (TCP/139 and TCP/445) are being actively refused... if the connection is coming in on pure IPv4. If the incoming connection is coming by way of the 6to4 tunnel those connections establish and work just fine. It isn't the Firewall, since this behavior can be replicated with the firewall turned off. Also, it's actually issuing RST packets to connection attempts; something that only happens with a Windows Firewall if there is a service behind a port and the service itself denies access. I doubt it's some firewall device on the wire, since the server this one replaced was running Samba and access to it from our main network functioned just fine. I'm thinking it might have something to do with the Subnet lists in AD Sites & Services, but I'm not sure. We haven't put any IPv6 addresses in there, just v4, and it's the v4 connections that are being denied. Unfortunately, I can't figure this out. We need to be able to talk to this DC from the main campus. Is there some kind of site-based SMB-level filtering going on? I can talk to the DC's on campus just fine, but that's over that v6 tunnel. I don't have access to a regular machine on that remote subnet, which limits my ability to test.

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  • Cisco ASA Site-to-Site VPN Dropping

    - by ScottAdair
    I have three sites, Toronto (1.1.1.1), Mississauga (2.2.2.2) and San Francisco (3.3.3.3). All three sites have ASA 5520. All the sites are connected together with two site-to-site VPN links between each other location. My issue is that the tunnel between Toronto and San Francisco is very unstable, dropping every 40 min to 60 mins. The tunnel between Toronto and Mississauga (which is configured in the same manner) is fine with no drops. I also noticed that my pings with drop but the ASA thinks that the tunnel is still up and running. Here is the configuration of the tunnel. Toronto (1.1.1.1) crypto map Outside_map 1 match address Outside_cryptomap crypto map Outside_map 1 set peer 3.3.3.3 crypto map Outside_map 1 set ikev1 transform-set ESP-AES-256-MD5 ESP-AES-256-SHA crypto map Outside_map 1 set ikev2 ipsec-proposal AES256 group-policy GroupPolicy_3.3.3.3 internal group-policy GroupPolicy_3.3.3.3 attributes vpn-idle-timeout none vpn-tunnel-protocol ikev1 ikev2 tunnel-group 3.3.3.3 type ipsec-l2l tunnel-group 3.3.3.3 general-attributes default-group-policy GroupPolicy_3.3.3.3 tunnel-group 3.3.3.3 ipsec-attributes ikev1 pre-shared-key ***** isakmp keepalive disable ikev2 remote-authentication pre-shared-key ***** ikev2 local-authentication pre-shared-key ***** San Francisco (3.3.3.3) crypto map Outside_map0 2 match address Outside_cryptomap_1 crypto map Outside_map0 2 set peer 1.1.1.1 crypto map Outside_map0 2 set ikev1 transform-set ESP-AES-256-MD5 ESP-AES-256-SHA crypto map Outside_map0 2 set ikev2 ipsec-proposal AES256 group-policy GroupPolicy_1.1.1.1 internal group-policy GroupPolicy_1.1.1.1 attributes vpn-idle-timeout none vpn-tunnel-protocol ikev1 ikev2 tunnel-group 1.1.1.1 type ipsec-l2l tunnel-group 1.1.1.1 general-attributes default-group-policy GroupPolicy_1.1.1.1 tunnel-group 1.1.1.1 ipsec-attributes ikev1 pre-shared-key ***** isakmp keepalive disable ikev2 remote-authentication pre-shared-key ***** ikev2 local-authentication pre-shared-key ***** I'm at a loss. Any ideas?

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  • Cisco ASA site-to-site vpn not initiating phase 1 (not sending udp 500 packets)

    - by Sean Steadman
    I am hoping someone here can help me with my problem. I am trying to setup an IPSEC site-to-site VPN between two cisco ASA 5520's in GNS3 (both using 8.4.2). I have been unsuccesful in getting the tunnel up and it appears neither ASA is sending packets out,in regards to phase 1 and phase 2 (tested by using wireshark and seeing NO udp 500 packets). Doing show ipsec sa and such shows nothing. CALIFORNIA(config)# show ipsec sa There are no ipsec sas FLA-ASA# show ipsec sa There are no ipsec sas I will attach both configurations in two different pastebin files as to keep this post a bit cleaner. Essentially California side has 172.20.1.0/24 and Florida side has 10.10.10.0/24. California ASA config: http://pastebin.com/v0pngYzF Florida ASA config: http://pastebin.com/E2geybta Please let me know if there is any other vital information that could help. I have gotten IPSEC tunnels to work using openSwan (linux) and cisco routers but cannot for the life of me get ASA IPSEC tunnels to work. The ASDM is out of the question I only use cli. Thanks for any useful help!

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  • Creating a custom Publishing Portal Web site in SharePoint 2010

    - by Jourdan
    Custom Web sites built on SharePoint are cropping up everywhere (just visit topsharepoint.com to see). With that said, my question pertains to creating a fully customized, branded site using SharePoint as the CMS as depicted by many of the topsharepoint.com sites. I understand the concept of creating the custom master master page(s) (SharePoint 2010 even includes a minimal.master to start). The problems I have are: What site template does one use? In 2007 the recommended front-facing Web site site collection template was the Publishing Portal. Is this still the case? What navigation do you use? Do you leverage the OOB navigation? If so, how do you style it extensively? How do you keep the on-page editing capabilities within the new site template? Are there any online tutorials are walk-throughs that address all of these issues? I have been searching, but it's really sparse out there.

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  • A good open source web crawler for indexing Specific website for specific contents?

    - by Peeyush
    Hello Please suggest me a good open source web crawler written in C++,JAVA or PHP. i just need to crawl/index some specific websites for specific contents(images,text,videos). i know that their are already a lot of question & answers about this topic on this website but i am a little confused after reading all of them. So i am sorry if i am repeating the same question again. -Thanks in advance

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  • Site Server 3 user blacklisting

    - by Gary McGill
    I doubt that anyone even remembers Site Server 3 - most of those that had any contact with it will have spent the last decade trying to forget. But, on the off-chance that someone out there does remember it, perhaps you also remember what can be done to un-blacklist a user who has been blacklisted as a result of supplying incorrect login details 3 times? I have a user that's been blacklisted that I really really need to recover, and yet I can find no way to do this. (I'm not even able to figure out where the blacklist is stored - I'd be quite prepared to nuke it if that's what it takes).

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