I'm having some weird problems with ipv6 on my box.
My ISP is set up for ipv6, my router and server both seem to have valid
ipv6 addresses, and ipv6 connectivity seems to (nominally) be working:
[darose@darsys12 ~]$ ping ipv6.google.com
PING ipv6.google.com(lga25s63-in-x0e.1e100.net
(2607:f8b0:4006:81b::200e)) 56 data bytes
64 bytes from lga25s63-in-x0e.1e100.net (2607:f8b0:4006:81b::200e):
icmp_seq=1 ttl=55 time=13.1 ms
64 bytes from lga25s63-in-x0e.1e100.net (2607:f8b0:4006:81b::200e):
icmp_seq=2 ttl=55 time=11.0 ms
^C
[darose@darsys12 ~]$ curl -I ipv6.google.com
HTTP/1.1 200 OK
Date: Mon, 23 Jul 2018 15:35:06 GMT
Expires: -1
Cache-Control: private, max-age=0
Content-Type: text/html; charset=ISO-8859-1
P3P: CP="This is not a P3P policy! See g.co/p3phelp for more info."
Server: gws
X-XSS-Protection: 1; mode=block
X-Frame-Options: SAMEORIGIN
Set-Cookie: 1P_JAR=2018-07-23-15; expires=Wed, 22-Aug-2018 15:35:06 GMT;
path=/; domain=.google.com
Set-Cookie:
NID=135=SV0kZxYO7fTnUYm0ZJFnRx-d17kNOyTyHgPzv-xKmj_Q-LXYz_LuiBsAGHesREIbtwbKZAKYeqU8fh0saXfnylDGsBbAwCQDAKeG9iT9PwmBc0IBntqO0xkklns-YThY;
expires=Tue, 22-Jan-2019 15:35:06 GMT; path=/; domain=.google.com; HttpOnly
Transfer-Encoding: chunked
Accept-Ranges: none
Vary: Accept-Encoding
However, certain server utilities - most notably freshclam (clamav) and
the w3m command line web browser - are having problems successfully
making connections using ipv6. For example:
w3m via ipv4 works:
[darose@darsys12 ~]$ w3m -4 -dump google.com | grep -i google
Google
[Google Search][I'm Feeling Lucky]
tools
Advertising ProgramsBusiness Solutions+GoogleAbout Google
but w3m via ipv6 doesn't:
[darose@darsys12 ~]$ w3m -6 -dump ipv6.google.com
... hangs forever ...
Even weirder:
this works:
[darose@darsys12 ~]$ w3m -4 -dump_head google.com
HTTP/1.0 200 OK
Date: Mon, 23 Jul 2018 15:21:52 GMT
Expires: -1
Cache-Control: private, max-age=0
Content-Type: text/html; charset=ISO-8859-1
Content-Encoding: gzip
Server: gws
Content-Length: 4675
X-XSS-Protection: 1; mode=block
X-Frame-Options: SAMEORIGIN
Set-Cookie: 1P_JAR=2018-07-23-15; expires=Wed, 22-Aug-2018 15:21:52 GMT;
path=/; domain=.google.com
... but this doesn't:
[darose@darsys12 ~]$ w3m -6 -dump_head ipv6.google.com
... hangs ... until I hit control C
... then succeeds after the control-c (wtf?!?!?)
^CHTTP/1.0 200 OK
Date: Mon, 23 Jul 2018 15:39:44 GMT
Expires: -1
Cache-Control: private, max-age=0
Content-Type: text/html; charset=ISO-8859-1
Content-Encoding: gzip
Server: gws
Content-Length: 4680
X-XSS-Protection: 1; mode=block
X-Frame-Options: SAMEORIGIN
Set-Cookie: 1P_JAR=2018-07-23-15; expires=Wed, 22-Aug-2018 15:39:44 GMT;
path=/; domain=.google.com
And freshclam fails as well:
[darose@darsys12 ~]$ sudo freshclam
ClamAV update process started at Mon Jul 23 11:41:13 2018
WARNING: Your ClamAV installation is OUTDATED!
WARNING: Local version: 0.100.0 Recommended version: 0.100.1
DON'T PANIC! Read https://www.clamav.net/documents/upgrading-clamav
main.cld is up to date (version: 58, sigs: 4566249, f-level: 60,
builder: sigmgr)
nonblock_recv: recv timing out (30 secs)
WARNING: getfile: Download interrupted: Operation now in progress (IP:
2400:cb00:2048:1::6810:bb8a)
WARNING: getpatch: Can't download daily-24740.cdiff from database.clamav.net
Trying host database.clamav.net (2400:cb00:2048:1::6810:b98a)...
nonblock_recv: recv timing out (30 secs)
WARNING: getfile: Download interrupted: Operation now in progress (IP:
2400:cb00:2048:1::6810:b98a)
WARNING: getpatch: Can't download daily-24740.cdiff from database.clamav.net
Downloading daily-24740.cdiff [100%]
...
I'm really stumped as to how ipv6 could partially fail like this only on
specific apps. Seems like it should either completely work or
completely fail.
Anyone have any idea what might be happening here and/or how to fix?
Thanks,
DR
