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Frequently Asked Questions

Can I use ssh across a Socks firewall?

The Secure Shell (SSH) FAQ - Frequently Asked Questions
Socks 4 and 5 support should work in 1.2.16 or later. Socks support in version 2.0.11 and later should work.
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Can I use ssh to communicate across a firewall?

The Secure Shell (SSH) FAQ - Frequently Asked Questions
Yes; you can use TCP forwarding for that, by using its secure TCP forwarding features. You can also tunnel through another open port through the firewall (I'm sure all those system admins love me now :-) by running a daemon on the remote side on a port that's allowed through a firewall, like SSL (port 443).
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K1. How can I use fetchmail with SOCKS?

The Fetchmail FAQ
Giuseppe Guerini added a --with-socks option that supports linking with socks library. If you specify the value of this option as ''yes'', the configure script will try to find the Rconnect library and set the makefile up to link it. You can also specify a directory containing the Rconnect library. Alan Schmitt has added a similar --with-socks5 option that may work better if you have a recent version of the SOCKS library.
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What protocols does SSH use?

The Secure Shell (SSH) FAQ - Frequently Asked Questions
For the SSH1 protocol, you can find this information in an old IETF draft available here. It is also available with the source distribution.
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Can I use rdist or rsync with ssh?

The Secure Shell (SSH) FAQ - Frequently Asked Questions
If you use rdist, don't forget to compile the path to ssh into it. Alternatively, you may specify the -P option so rdist uses ssh, and not rsh. If you use password authentication with rdist 6.1.2 through 6.1.5, you will need to apply the following patch to rdist to make it work: --- src/rshrcmd.c.orig Tue Jun 11 16:51:21 1996 +++ src/rshrcmd.c Tue Jun 11 16:52:05 1996 @@ -63,7 +63,7 @@ /* child. we use sp[1] to be stdin/stdout, and close sp[0].
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How do I know if my socks use Blister Guard?

Athleticwear Frequently Asked Questions (FAQ) - Friction Fre...
There are many top brands knitting the Blister Guard technology into their well-established product lines already. Look for the Blister Guard logo on the package.
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Why do you use cotton on the outside of your Drymax® Socks?

Strabell - Active Dry FAQ's
Since all shoes are made differently, we could not count on the materials inside the shoes to prevent moisture from returning back to the skin. Moisture has no adhesion to our Drymax fibers, so it moves through the inner Drymax layer until it finds something (in this case, the outer cotton layer) to absorb it. We put a layer of cotton on the outside of the sock to attract & hold moisture away from the skin.
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How do I permit SSH traffic through the firewall?

E-Mail. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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I have Windows XP. Can I use a firewall other than the built-in firewall?

Firewall: FAQ
Yes. Windows XP users who want different features in a firewall may use a hardware firewall or a software firewall from another company. For special offers on antivirus and firewall packages, visit our Security software: Downloads and trials page. No. Running multiple software firewalls is unnecessary for typical home computers, home networking, and small-business networking scenarios.
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Should I use the Internet Connection Firewall on a computer that is also behind a hardware firewall?

Firewall: FAQ
Yes. You should turn on the Windows XP Internet Connection Firewall for all computers in your home network. This helps prevent the spread of viruses or worms across your network if a computer is infected. A computer on the network could become infected through a separate Internet connection, such as one on a laptop that is used on your home network and on public networks. Or a virus could be introduced to a computer on your network by way of e-mail or software installed from a CD or floppy disk.
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Can I use ssh to securely connect two subnets across the Internet?

The Secure Shell (SSH) FAQ - Frequently Asked Questions
You can run PPP over a regular ssh connection. See http://www.inka.de/~bigred/sw/ssh-ppp-new.txt for a working solution. It's a good idea to enable compression for this. However, this may cause problems for forwarding TCP connections, because both the TCP connection over which ssh runs and a TCP connection forwarded over the PPP/ssh tunnel may retransmit at the same time. In this case, it is better to use encrypted IP tunneling via UDP. A possible implementation of this is http://www.inka.
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Can I use TCP wrappers for added security on SSH?

The Secure Shell (SSH) FAQ - Frequently Asked Questions
You will also need to define the /etc/hosts.allow and /etc/hosts.deny appropriately. See the TCP Wrappers documentation for more details.
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How do I use ssh?

FAQ
Xtools doesn't automatically detect where your ssh files are and add them to your UNIX path. In order to use ssh, you either need to type in the full path to the ssh commands (for instance: /usr/loal/bin/ssh) or add the path to your PATH variable. Yes, the directions in the manual are meant to serve as an example. They walk you through setting up RSA keys for SSH1. The steps for setting up RSA keys for SSH2 is exactly the same, it just uses different commands.
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Networking FAQ
ssh (Secure SHell) is a method of securely connecting to a remote computer. It is the secure equivalent of telnet or rsh (remote shell). It is the preferred method of connecting to CAE Unix machines. From the Start Menu in the lower left of the screen, choose CAE Applications, Internet, Secure CRT 3.3. A box will open asking you to choose a Sun computer to connect to. You can choose any number from 1-60. Then you will be asked to type your Unix password in.
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Nyx Net FAQ
Yes! ssh (secure shell) is available on Nyx1, Nyx2 and Nyx3 for all validated users. Nyx and nyx10 cannot currently withstand the load of users using ssh. So ssh is restricted to administrators. Yes, this means Nyx is awfully busy (if it takes more than a minute to search through a 200k file, that's a slooooow system). Think of it as a built in limit to how busy Nyx gets -- it refuses to let other people on to make it even busier.
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I have diabetes. Are these socks appropriate for me to use?

Paladin Research - Lifesocks and Paladin Medical
The Paladin socks have been designed with you in mind! Frequently with diabetes, high blood sugar levels interfere with nerve function that can damage (sometimes permanently) the nerves, causing them to send odd signals or no signals at all. It is rather like having ‘fire alarms’ on your feet that cannot work properly.
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Why shouldn't I use fabric softener when I wash my Drymax® Socks?

Strabell - Active Dry FAQ's
Fabric softener will coat the sock's fibers and not allow them to move as much moisture away from the foot as normal. To remove the fabric softener, simply launder the socks with detergent.
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Can I use BuddySpace through a socks server?

BuddySpace FAQ - Frequently Asked Questions
The current version of BuddySpace (2.5.2) doesn't use a socks server. However it will appear in the next version...
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Can I use ssh to protect services like ftp or POP?

The Secure Shell (SSH) FAQ - Frequently Asked Questions
If you want to avoid sending ftp passwords in cleartext over the net, you can use ssh to encrypt your command channel. This will still leave your data channel open to all attacks on TCP, and will not work through a firewall. You can either use ftpsshd by Per-Erik Martin at http://www.docs.uu.se/~pem/hacks/ for SSH1, or you can do this by hand. Suppose you are on a host called myhost and want to initiate a ftp connection to ftphost. On myhost, you do myhost$ ssh -g -L 1234:ftphost.example.
Related Questions

What foot-wear should I use with dry socks?

Dry Suit FAQ, A Buyer's Guide to Drysuits for Non-SCUBA Use
Dry socks are paper thin, so you need to wear something to cover and protect them. And for kayakers, this means both while walking and when sitting in your kayak. So for kayakers, sandals are out becuase you need your heel covered to protect the sock while paddling. Wet-suit booties will work, but for sea kayaking, rafting, and fishing, we sell a new water-sports shoe by Heli Hansen that is my favorite.
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Can Polipo use a SOCKS gateway?

Polipo FAQ
Yes. SOCKS4a and SOCKS5 with hostnames are supported. Please check the variables socksParentProxy and socksProxyType.
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How do I use KDX with a SOCKS Proxy?

Haxial FAQ: KDX
SOCKS seems to be obsolete and only a few people have asked about it. However, you can still use KDX with a SOCKS proxy if you find and download one of those SOCKS programs that enable the use of SOCKS in a program (such as KDX) that does not normally support SOCKS. For MS Windows, we suggest SocksCap. For MacOS, you could try ProxyBouncer. Please note that we have never tried these programs and we do not know how well they work. There may be other programs that do a similar thing.
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Can I use VPN through a firewall?

VPN Frequently Asked Questions (FAQ)-The Library-University ...
No. VPN provides security by encrypting and decrypting data that passes through a VPN connection; it does not offer protection from viruses or other malware.
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How do I use VNC through my firewall?

RealVNC - Frequently asked questions
Many organizations operate firewalls to reduce the risk of intrusion by malicious attackers via the Internet. These firewalls typically operate by only allowing connections in to machines in that organization on specific ports. Which ports are permitted access depends upon the network protocol that uses the port and the degree of security it provides.
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Should I use a firewall if I have more than one computer in a home or small-office network?

Firewall: FAQ
Yes. If you have more than one computer in a home or small-office network, you should protect every computer in the network. Turning on Windows Firewall or another firewall on every connection will help prevent the spread of a virus from one computer to another in your network if one of your computers becomes infected. However, if you open an infected e-mail attachment, the firewall won't block it and it can infect your computer. You should install an antivirus program as well.
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