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• Torrent, ISA Server 2006 and packet dropped due to TCP_NOT_SYNC

  - by Pascal

  Hi, I'm trying to get uTorrent 2.0.4 to work in a DMZ machine, protected by a ISA Server 2006. I've opened 1 inbound port (via publishing) and opened all the higher ports for that specific machine that runs uTorrent on my DMZ, and it's working almost fine. The problem is that I keep getting packets dropped with 0xc0040017 FWX_E_TCP_NOT_SYN_PACKET_DROPPED. Is there any way to disable this via registry? Is there any way around this? The download speed fluctuates a lot, and when I starts hitting the upper limit that I've defined in uTorrent, the errors start poping up a lot, and the download speed goes way down, and the process repeats on and on Tks Edit My outbound rules are: Port Range: TCP 10000-65535 Outbound Port Range: UDP 10000-65535 Send Edit It's probably a bug handling requests from Windows 7. When I installed the uTorrent on a XP machine, the problem went away

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• Improving server security [closed]

  - by Vicenç Gascó

  I've been developing webapps for a while ... and I always had a sysadmin which made the environment perfect to run my apps with no worries. But now I am starting a project on myself, and I need to set up a server, knowing near to nothing about it. All I need to do is just have a Linux, with a webserver (I usually used Apache), PHP and MySQL. I'll also need SSH, SSL to run https:// and FTP to transfer files. I know how to install almost everything (need advice about SSL) with Ubuntu Server, but I am concerned about the security topic ... say: firewall, open/closed ports, php security, etc ... Where can I found a good guide covering this topics? Everything else in the server... I don't need it, and I wanna know how to remove it, to avoid resources consumption. Final note: I'll be running the webapp at amazon-ec2 or rackspace cloud servers. Thanks in advance!!

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• Port forwarding through a client bridge

  - by Gabe Tanenhaus

  I am having a problem with port forwarding with a client bridge. My main router is a 2wire router from AT&T using their firmware. It is a Router/Modem. In my room, there is a Linksys WRT54GL with DD-WRT on it. I have set up the DD-WRT one as a Client bridge for my PC. I can access the internet on my computer using it but when I try and port forward, the ports stay closed. I am port forwarding on my main router (2wire) and it doesn't work. I have checked online and all I see is that I should only need to forward on the main router since the client bridge has NAT disabled, but it seems to not work that way. Any ideas?

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• Management VLAN Cisco Catalyst

  - by cha789

  I have configured a couple of VLANs on a Cisco Catalyst switch, i will put all the ports that clients is connected to, into these VLANs. I want to configure the native VLAN [vlan 1] as management VLAN so i can use a telnet client to connect to the switch. How can i block all but one specific IP-address to telnet into the switch? As i understand vlan 1 has many task regarding different protocols and i do not want to break that but only allow one specific IP-address to connect to the switch with a telnet client [actually the gateway ip address of the switch].

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• How to set up Windows server 2008 to receive email?

  - by Saul

  First off apologies, I'm from a medical background not a networking one, but I've got roped into setting up a windows 2008 server. So far web server running, fixed IP address assigned (within a large private network of the National Health Service in the UK if that makes any difference) and the network team have assigned a DNS entry for me which works, so the server can be addressed as nww.myserver.nhs.uk I've only got ports open on the router for 80 and 443 (http and https) at the moment, so presume I need a different port to enable email services. My need is to be able to accept an email to the domain name like [email protected] in order to pick up a confirmation mail from an SSL issuer (Comodo) I guess to confirm that I control the domain. After that I don't actually need mail services on the server. I see lots of stuff about setting up SMTP services but thought that was about mail out and re-routing, but how do you get the server to "listen" for mail to the domain (assuming I open port xyz or whatever it is) ?

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• Remote connection to dynamic public ip & private ip addresses

  - by user53864

  Many times I connected to windows computer which has static public ip address via remote desktop over wan links. I'm wondering how could I connect to the remote computer that has dynamic public ip address & private ip addresses assigned. I've 2 systems at home: xp system-------connected to internet(dynamic public ip) & allowed other users to connected to the internet on the interface. windows vista system--------enabled dhcp on the interface to access internet from xp. How could I remotely connect from my office to the 'vista system'?. If I've a router/modem at my home it may be possible to allow the ports for the system but I don't. Any tips?

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• Usage of two Routers on LAN

  - by brusilva

  I've currently own a Linksys E4200 and a Thomson 546v6. Because I have an IPTV service I must set the Thomson as the main router connected to the phone line so that I can distribute the video signal for 2 specific ports and the other two for LAN Access. The problem is that the Thomson doesn't like port forwards, it usually doesnt work and since I have a good router (linksys) currently only working as Access Point I would like to use it as a router itself. I don't want to do a NAT beyond NAT so my question is should I connect the E4200 and to thomson and set the E4200 as a DMZ machine and then control all trafic on the E4200 itself or is there any other option that could suit my needs better?

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• Ubuntu and mysql server. Something isnt allowing me to connect

  - by acidzombie24

  I have a question about mysql settings http://serverfault.com/questions/94054/remote-connections-and-mysql-on-ubuntu/94088#94088 now i want to figure out why i cannot connect. I made sure bind-address was commented out. I can ping the server within the VM but i cannot ping it from within the VM using mysqladmin --protocol=tcp --host=self_ip ping. I also followed along and check if my ports were open and they look like they are. I setup samba on that VM and can access that with no problem as well. It looks like ubuntu does not have a firewall either (i figured this out before) so i am stumped why the server isnt allowing my connection. Apparently the config file works on another person side http://www.pastie.org/742545 I am using Ubuntu 6.06 LTS just because of 'support' reasons. So hopefully this will be 'easy'?

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• My website directories downloads instead of actually opening up from browser

  - by numerical25

  I added some screencast to show what I am having issues with http://screencast.com/t/212t3ANINqk http://screencast.com/t/bR44U1wkvNZl http://screencast.com/t/iDS7APYYsa but the page downloads my subdirectories instead of opening them up and displaying the index file of that page Here is the situation. I am trying to get my web service up using mac ports and I am just trying to configure all the files. I am using php, apache, etc. the page goes to the localhost root but anything beyond that. it can not find. edit Ive tried to add the following to httpd.conf within the <IfModule mime_module> but no hope AddType application/x-httpd-php .php AddType application/x-httpd-php .phtml AddType application/x-httpd-php .php3 AddType application/x-httpd-php .php4 AddType application/x-httpd-php .html AddType application/x-httpd-php-source .phps

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• mystery Internet traffic to port 445

  - by Ben Collver

  Recently, I noticed traffic from the office network to TCP port 445 on the Internet [a]. Below are the Linux firewall log entries to Facebook's network [b] and Google's network [c]. I would like to identify the source of this traffic. My first guess is that Facebook and Google might be using multiple TCP ports for SSL load balancing. However, I could not confirm this based on the web proxy logs. What else might it be? [a] http://support.microsoft.com/kb/204279 [b] Sep 4 08:30:03 firewall01 kernel: IN=eth0 OUT=eth2 SRC=10.0.0.131 DST=69.171.237.34 LEN=52 TOS=0x00 PREC=0x00 TTL=127 ID=14287 DF PROTO=TCP SPT=51711 DPT=445 WINDOW=8192 RES=0x00 SYN URGP=0 [c] Aug 28 06:02:41 firewall01 kernel: IN=eth0 OUT=eth2 SRC=10.0.0.115 DST=173.194.33.47 LEN=52 TOS=0x00 PREC=0x00 TTL=127 ID=4558 DF PROTO=TCP SPT=49294 DPT=445 WINDOW=8192 RES=0x00 SYN URGP=0

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• OSX Parallels 5 - can't share internet connection when using host-only networking...

  - by Steve Kirtley

  I've just upgraded from Parallels 3 to Parallels 5, but am having a problem matching my previous configuration. I am a web developer so run a local web server on my mac. I used to allow access to this from the virtual machines in Parallels by using 'Host-Only Networking' and then in OSX enabling internet sharing from my wifi/ethernet to the virtual ethernet ports that Parallels created. The setup was based on: http://www.craigfrancis.co.uk/features/setup/parallels/ The new version of Parallels doesn't create any network adaptors that are available for internet sharing in OSX - just VNIC's which only show under an ifconfig... Can anyone suggest how to make this all play nice? Thanks in advance! Steve

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• Windows 2008 Routing and Remote access server - access to the internet

  - by Ian

  I have a windows 2008 r2 remote access server set up and running. The remote access works fine. My problem is that the remote access server itself doesn't have access to the internet. The box has two interfaces, an internal and an external. Inbound connections come in on the external interface and RRAS responds. All wall and nice. I want to be able to use windows update, browse, etc from this box but can't as the outbound traffic just gets blocked. I've tried going into the RRAS mmc tool and opening the interface properties, under which there are two buttons for inbound and outbound filters. There I tried adding ports 80 and 443, but this doesn't work completely. I can see the connection initiating (Syn goes out) but the session never establishes itself. Anyone done this or got any suggestions?

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• Static Route Qestion

  - by mrlayance

  I have a Wan simulator between 2 networks. I can ping both networks from the wan simulator, but I can not ping from one network to the other. testr01 Fa0/0 10.0.0.1/24 FA0/1 192.168.0.1/30 | | Wan Sim 2 nics Eth0 192.168.0.2/30 | Eth1 192.168.1.2/30 | | testr02 Fa0/1 192.168.1.1/30 Fa0/0 10.1.0.2/24 I can not figure out what type of routes I need. On the route? On the Server? I guess all 10. traffic to the Fa0/0 ports? Thanks

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• Copy files between two windows machines on seperate domains

  - by Simon

  I need to copy several database backups between two computers. The source computer initiates the copy and is a Windows 2000 pc and is a member of domain1. The destination machine is running Windows Server 2000 and is a member of domain2. The machines are on separate networks physically connected via a firewall. The files are currently copied via ssh with http://sshwindows.sourceforge.net/ installed on the destination machine. There is no need to encrypt the contents during the copy, however the passwords should not be sent in the clear. I am looking for a way to copy the files without having to install a server on the destination. I specifically need help with how to set up the permissions and what ports would need to be opened on the firewall.

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• CA and VPN setup

  - by Raj

  We are a small comany about 20 employees. We have some off site some i houser servers. Where should I install CA? On a domain controller or VM? can I obtain my own certificate for MS VPN? Where should I install MS vpn server? can I install on VM CA server? Do I need to open any ports on Firewall? Please send me or direct me to a web site where I can get setip by step installation instructions. Thanks.

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• Load balancing with Cisco router

  - by you8301083

  I have a Cisco router with two bonded T1's which are setup as a VPN to the main office. We need more bandwidth but can't get other connections (or it's too costly), so I would like to have a dsl connection installed. This DSL connection will run over a VPN to the same main office, but it won't be bonded with the T1's - so it won't act as a single connection. Since the three circuits won't act as a single connection (basically would be two connections 2 T1's + 1 DSL) we would have to split the network in half - but I don't want to do that. Instead, would it be possible to send all HTTP/HTTPS over the DSL connection but send all mission critical data (such as voice/active directory) over the T1's? I basically want to send specific ports over DSL and everything else over the T1's without separating half of the users traffic over the DSL and the rest over the T1's.

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• On VMWare Server, how can I specify which Ethernet port should be the one to be bridged?

  - by DrDavid

  My server has 4 ethernet ports; 1 uses a APIPA address to connect to a DroboElite (that's how they're designed to work), 1 is connected to the LAN, and the other two are unused currently. The issue is that VMWare Server seems to have an affinity to the port that's connected to the Drobo, which means that it can never reach the internet. If I disable the Drobo port, everything works just fine. If I enable the drobo port, nothing works (well, the drobo works, but the virtual machine doesn't ;) ) How can I tell VMWare Server to NOT use the drobo port when I'm bridging the connection?

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• Cannot assign port 4 to WAN on TP-Link WR740N by DD-WRT wiki

  - by Victor Sergienko

  I'm following the DD-WRT instruction to get TP-Link WR740N v3's Port 4 on a different VLAN, but this doesn't happen. First, I have no "Setup VLANs" settinngs tab in DD-WRT v24-sp2 (07/20/12) std r19519. I can get Internet on Wi-Fi if assigning eth1 to "WAN Port", but then all Ethernet ports get on the same VLAN and any wired connection grabs the DHCP address and Internet connection from router. When following the "old" instruction, if I run, say, nvram set vlan2ports="2 5*", should there appear a new interface, vlan2, in ifconfig, after ifconfig vlan2 up? It doesn't - does it mean there is no support for different VLANs in my software/hardware? What am I missing? Is it impossible to create more VLANs on TP-Link740?

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• How to troubleshoot a remote wmi query/access failure?

  - by Roman

  I'm using Powershell to query a remote computer in a domain for a wmi object, eg: "gwmi -computer test -class win32_bios". I get this error message: Value does not fall within the expected range Executing the query local under the same user works fine. It seems to happen on both windows 2003 and also 2008 systems. The user that runs the shell has admin rights on the local and remote server. I checked wmi and dcom permissions as far as I know how to do this, they seem to be the same on a server where it works, and another where it does not. I think it is not a network issue, all ports are open that are needed, and it also happens within the same subnet. When sniffing the traffic we see the following errors: RPC: c/o Alter Cont Resp: Call=0x2 Assoc Grp=0x4E4E Xmit=0x16D0 Recv=0x16D0 Warning: GssAPIMechanism is not found, either caused by not reassembled, conversation off or filtering. And an errormessage from Kerberos: Kerberos: KRB_ERROR - KDC_ERR_BADOPTION (13) The option code in the packet is 0x40830000 Any idea what I should look into?

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• Configuring ejabberd on ubuntu ami of amazon ec2

  - by andy

  This is my first experience with ejabberd. Spare me if I miss anything. I have installed ejabberd server on ubuntu 12.04 AMI on Amazon EC2. I have successfully installed the server, added the admin user and host in the config file and opened up reqd ports (5222, 5223, 5269, 5280). Now I tried to login the web admin interface using the admin user id and password. I could log in, BUT I could only see one section, Virtual Hosts. No Control Lists, Access rules, Nodes and Statistics Menu items on the left. Also, when I click Virtual Hosts Menu item, the page that comes up does not show anything. Here are the screenshots

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• FTP error 424 failed to establish connection

  - by cKK

  Getting "ftp error 425 failed to establish connection" when trying to connect to ftp server. Tried 2 ftp clients on 3 machines on same network and none work. However FTP works from home / mobile broadband. No ip blocks on ftp sever. Other ftp servers(differrent ip/hosts) work okay. firewall setup correct, no ports blocked. Is it possible to use a proxy for ftp a i think it's something with the ISP but taking too long to fix?

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• MAC to IP binding in ASA 5510 / SG 300-52

  - by Sampsa

  I am trying to configure a Cisco ASA 5510 to assign specific IP-addresses to specific MACs. Firmware on my ASA is 8.2(5). I have used this feature in our previous device (Cisco SA-520W). I have also read that this feature is (not yet) implemented. How do I work around this problem, if not by direct assignment? Do I need to specify fixed IP's on concerned devices themselves? I also have a SG 300-52 switch for our LAN. We cannot specify IP-addresses to ports, because we have further switches down the line. Thank you for your help!

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• AWS EC2: How to determine whether my EC2/scalr AMI was hacked? What to do to secure it?

  - by Niro

  I received notification from Amazon that my instance tried to hack another server. there was no additional information besides log dump: Original report: Destination IPs: Destination Ports: Destination URLs: Abuse Time: Sun May 16 10:13:00 UTC 2010 NTP: N Log Extract: External 184.xxx.yyy.zzz, 11.842.000 packets/300s (39.473 packets/s), 5 flows/300s (0 flows/s), 0,320 GByte/300s (8 MBit/s) (184.xxx.yyy.zzz is my instance ip) How can I tell whether someone has penetrated my instance? What are the steps I should take to make sure my instance is clean and safe to use? Is there some intrusion detection techinque or log that I can use? Any information is highly appreciated.

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• Virtualmin Configuration

  - by Allen

  I am trying to get Virtualmin setup and have reached a point where my noobish sysadmin skills aren't getting the job done. This is the message I get now when I try and refresh the configuration of Virtualmin. BIND DNS server is installed, and the system is configured to use it. However, the default master DNS server XXXXXX is not a fully qualified domain name. Sendmail is only accepting SMTP connections on the following ports : 127.0.0.1 port smtp. Email from other systems on the Internet will not be accepted. This can be changed in the Sendmail Mail Server module. Please advise what I need to do to get Sendmail configured properly. Thanks!

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• Cable management between multiple racks

  - by RippieUK

  I am in the planning phase of re-cabling our 5 racks in one of our offices and I would like to ask for some guidance on how you go, or would go about managing cables that goes between racks. In our situation we have 5 racks where the furthest to the right is our main patch panel for 300 floor ports. The rack next to it is our main comms rack where main switches and ISP routers are located. the other 3 racks next to the comms rack then all need to connect back to the main comms rack. I am not sure if a 48 port patch panel in each rack would be any good for this scenario? mainly because i am not sure this can be linked back to the main switch with only 1 cable. Would a 48 port switch in each rack be better as you can uplink those back to main switch? Or should we just run cables between racks back to the main switch? Hope someone can offer some guidiance. Thx

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