Simon Tatham 0613ec9986 Add a docs note about DNS performed by GSSAPI. ...

I recently noticed a mysterious delay at connection startup while
using an SSH jump host, and investigated it in case it was a bug in
the new jump host code that ought to be fixed before 0.77 goes out.

strace showed that at the time of the delay PuTTY was doing a DNS
lookup for the destination host, which was hanging due to the
authoritative DNS server in question not being reachable. But that was
odd, because I'd configured it to leave DNS lookup to the proxy,
anticipating exactly that problem.

But on closer investigation, the _proxy_ code was doing exactly what
I'd told it. The DNS lookup was coming from somewhere else: namely, an
(unsuccessful) attempt to set up a GSSAPI context. The GSSAPI library
had called gethostbyname, completely separately from PuTTY's own use
of DNS.

Simple workaround for me: turn off GSSAPI, which doesn't work for that
particular SSH connection anyway, and there's no point spending 30
seconds faffing just to find that out.

But also, if that puzzled me, it's worth documenting!

2022-02-22 18:44:48 +00:00

..

blurb.but

Integrate the 'doc' subdir into the CMake system.

2021-05-03 17:01:55 +01:00

chm.css

Minor style tweaks for the CHM.

2006-12-19 10:28:44 +00:00

chmextra.but

Integrate the 'doc' subdir into the CMake system.

2021-05-03 17:01:55 +01:00

CMakeLists.txt

doc/CMakeLists.txt: reorganise custom targets.

2022-01-22 14:42:03 +00:00

config.but

Add a docs note about DNS performed by GSSAPI.

2022-02-22 18:44:48 +00:00

errors.but

Update docs for new host key prompts.

2022-01-11 23:57:39 +00:00

faq.but

Update source file names in comments and docs.

2022-01-22 15:51:31 +00:00

feedback.but

Tweaks to SUPDUP documentation.

2021-02-21 16:44:51 +00:00

gs.but

Update docs for new host key prompts.

2022-01-11 23:57:39 +00:00

index.but

Update proxy documentation.

2021-12-30 11:52:51 +00:00

intro.but

Docs: de-emphasise VMS.

2021-04-17 13:27:26 +01:00

man-pageant.but

Tidy up formatting of manpage cross-references.

2021-08-22 12:23:05 +01:00

man-plink.but

Add -pwfile option, a more secure version of -pw.

2021-09-28 18:04:15 +01:00

man-pscp.but

Add -pwfile option, a more secure version of -pw.

2021-09-28 18:04:15 +01:00

man-psftp.but

Add -pwfile option, a more secure version of -pw.

2021-09-28 18:04:15 +01:00

man-psocks.but

Tidy up formatting of manpage cross-references.

2021-08-22 12:23:05 +01:00

man-psusan.but

Document Cygwin as a use case for psusan.

2021-12-29 16:38:06 +00:00

man-pterm.but

Tidy up formatting of manpage cross-references.

2021-08-22 12:23:05 +01:00

man-putty.but

Tidy up formatting of manpage cross-references.

2021-08-22 12:23:05 +01:00

man-puttygen.but

Document PPK format parameters, and --reencrypt.

2021-04-20 15:35:50 +01:00

man-puttytel.but

Tidy up formatting of manpage cross-references.

2021-08-22 12:23:05 +01:00

mancfg.but

Now that Halibut is capable of generating man pages better than I

2004-03-24 19:36:04 +00:00

manpages.but

Now that Halibut is capable of generating man pages better than I

2004-03-24 19:36:04 +00:00

pageant.but

Pageant docs: improve the new OpenSSH section.

2022-01-26 19:59:19 +00:00

pgpkeys.but

GPG key rollover.

2021-08-14 08:02:27 +01:00

plink.but

Update usage messages embedded in docs.

2022-01-27 15:04:37 +00:00

pscp.but

Update usage messages embedded in docs.

2022-01-27 15:04:37 +00:00

psftp.but

File transfer tools: sanitise remote filenames and stderr.

2019-02-20 07:27:22 +00:00

pubkey.but

Windows PuTTYgen docs: remove redundant text.

2022-01-22 16:45:29 +00:00

pubkeyfmt.but

PuTTYgen: explicitly use 'Kbyte' in Argon2 naming.

2021-04-19 17:03:05 +01:00

site.but

Hmm, that relative link wasn't too good. Try a more helpful one.

2003-10-30 10:41:59 +00:00

sshnames.but

Document agent protocol extensions.

2021-04-05 18:44:03 +01:00

udp.but

Remove the prohibition on // comments.

2022-01-22 15:53:24 +00:00

using.but

Update proxy documentation.

2021-12-30 11:52:51 +00:00

vids.but

Rework versioning system to not depend on Subversion.

2014-09-24 10:33:13 +00:00