[x]
Posted via EE Mobile

Search, ask, and monitor your questions on the go with EE Mobile. Visit Experts Exchange from your mobile device and never be out of touch again.
Question
[x]
Attachment Details
[x]
The Solution Rating System

With so many solutions, how can you tell which solutions are most likely to help you and which ones are not? To provide you with a tool to use, we rate our solutions based on various elements that most accurately determine if a solution is a quality solution. To explain what factors affect the solution rating, here are the elements we take into consideration when formulating our solution rating.

  • The Grade of the Solution
  • The Zone Rank of the Expert Providing the Solution
  • The Number of Author and Expert Comments
  • The Number of Experts Contributing
  • The Feedback of the Community

Your Input Matters
Because of the way the system is set up, the most important variable in this equation is you. As a member of Experts Exchange, you are able to cast your vote on the quality of the solutions in regard to how complete, accurate, helpful and easy to understand each solution is. When you provide your feedback, each rating is adjusted accordingly. So, if you see a solution that has a poor rating that you think is a good solution, let us know by rating it. As you do, the rating will be adjusted and will become more accurate for other members of our site.

If you have any suggestions that you would like to make for our rating system, please ask a question in the Suggestions Zone of Community Support.

Thank you!
6.7

POP TLS connection stalls when AVG mail scanner running

Asked by red_nectar in Thunderbird Email Client, Anti-Virus, Anti-Virus Applications

Tags: avg anti-virus, thunderbird email

Request: Can anyone help me setup my AVG email scanner to work with Thunderbird accessing an email account that uses TLS?

Environment:
OS - Windows Vista Ultimate
Anti-virus: AVG Free 8.5.325
Email Client: Mozilla Thunderbird 2.0.0.2i
Email sever: Zimbra POP3 server - over which I have very little control, but if someone can tell me any setting that need to be adjusted on the server I can submit a request.

Problem: I  installed AVG Free three days ago.  Since then I have noticed that one of my email accounts has not being receiving mail - this particular account negotiates a TLS connection and have realised that since installing AVG, the email client connects to the server but never gets past the TLS connection.  Eventually (after 600 seconds) the TCP connection dies.  If I turn off the email scanner options in AVG free, the mail client connects normally and terminates normally (after downloading mail if any)
Below are two TShark dumps, with the mail server IP replaced by x.x.x.180.  The first examples shows a successful connection with the email scanner activated.  The second shows the same connection WITH the email scanner de-activated.

Additional Information:
Thunderbird server settings:
Server Type: POP Mail server
Server name: mail.x.x.x.com Port 110
User Name: me@x.x.x.com
Security Settings: Use Secure connection TLS, if available
Use Secure authentication:- NOT selected
Server settings: No sever settings selected

Thunderbird Security settings:
No certificates or Encryption options selected.
1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
21:
22:
23:
24:
25:
26:
27:
28:
29:
30:
31:
32:
33:
34:
35:
36:
37:
38:
39:
40:
41:
42:
43:
44:
45:
46:
47:
48:
49:
50:
51:
52:
53:
54:

With AVG Email scanner active: (Note 600 seconds of inactivity after packet 8)
  0.000000  192.168.1.225 -> x.x.x.180 TCP 49460 > 110 [SYN] Seq=0 Win=8192 Len=0 MSS=1260 WS=2 TSV=17385299 TSER=0
  0.256385  x.x.x.180 -> 192.168.1.225 TCP 110 > 49460 [SYN, ACK] Seq=0 Ack=1 Win=5792 Len=0 MSS=1452 TSV=3514443520 TSER=17385299 WS=7
  0.256488  192.168.1.225 -> x.x.x.180 TCP 49460 > 110 [ACK] Seq=1 Ack=1 Win=17472 Len=0 TSV=17385325 TSER=3514443520
  0.512457  x.x.x.180 -> 192.168.1.225 POP Response: +OK webmail.fireflycom.net Zimbra POP3 server ready
  0.517997  192.168.1.225 -> x.x.x.180 POP Request: CAPA
  0.777562  x.x.x.180 -> 192.168.1.225 TCP 110 > 49460 [ACK] Seq=54 Ack=7 Win=5888 Len=0 TSV=3514443650 TSER=17385351
  0.777925  x.x.x.180 -> 192.168.1.225 POP Response: +OK Capability list follows
  0.973338  192.168.1.225 -> x.x.x.180 TCP 49460 > 110 [ACK] Seq=7 Ack=163 Win=17308 Len=0 TSV=17385396 TSER=3514443650
600.800473  x.x.x.180 -> 192.168.1.225 TCP 110 > 49460 [FIN, ACK] Seq=163 Ack=7 Win=5888 Len=0 TSV=3514593650 TSER=17385396
600.800562  192.168.1.225 -> x.x.x.180 TCP 49460 > 110 [ACK] Seq=7 Ack=164 Win=17308 Len=0 TSV=17445379 TSER=3514593650
 
 
 
No Email Scanner Active: Note whole transaction complete in 5 seconds
  0.000000  192.168.1.225 -> x.x.x.180 TCP 49454 > 110 [SYN] Seq=0 Win=8192 Len=0 MSS=1260 WS=2 TSV=17365859 TSER=0
  0.257058  x.x.x.180 -> 192.168.1.225 TCP 110 > 49454 [SYN, ACK] Seq=0 Ack=1 Win=5792 Len=0 MSS=1452 TSV=3514394921 TSER=17365859 WS=7
  0.257162  192.168.1.225 -> x.x.x.180 TCP 49454 > 110 [ACK] Seq=1 Ack=1 Win=17472 Len=0 TSV=17365884 TSER=3514394921
  0.513003  x.x.x.180 -> 192.168.1.225 POP Response: +OK webmail.fireflycom.net Zimbra POP3 server ready
  0.703620  192.168.1.225 -> x.x.x.180 TCP 49454 > 110 [ACK] Seq=1 Ack=54 Win=17416 Len=0 TSV=17365929 TSER=3514394985
  1.019210  192.168.1.225 -> x.x.x.180 POP Request: AUTH
  1.311944  x.x.x.180 -> 192.168.1.225 TCP 110 > 49454 [ACK] Seq=54 Ack=7 Win=5888 Len=0 TSV=3514395176 TSER=17365961
  1.312291  x.x.x.180 -> 192.168.1.225 POP Response: -ERR mechanism not specified
  1.316545  192.168.1.225 -> x.x.x.180 POP Request: CAPA
  1.682771  x.x.x.180 -> 192.168.1.225 POP Response: +OK Capability list follows
  1.691405  192.168.1.225 -> x.x.x.180 POP Request: STLS
  1.947000  x.x.x.180 -> 192.168.1.225 POP Response: +OK Begin TLS negotiation
  1.960657  192.168.1.225 -> x.x.x.180 POP Request: \026\003\001\000\226\001\000\000\222\003\001\000\002\245\225 \311\026\355\220\232|\250\f%\323\264\366b|\271\207h\370E\036w\303[~\030\002u\000\0008\300
  2.228589  x.x.x.180 -> 192.168.1.225 POP Continuation
  2.231638  x.x.x.180 -> 192.168.1.225 POP Continuation
  2.231692  192.168.1.225 -> x.x.x.180 TCP 49454 > 110 [ACK] Seq=174 Ack=2716 Win=17472 Len=0 TSV=17366082 TSER=3514395412
  2.491021  x.x.x.180 -> 192.168.1.225 POP Continuation
  2.493185  x.x.x.180 -> 192.168.1.225 POP Continuation
  2.493266  192.168.1.225 -> x.x.x.180 TCP 49454 > 110 [ACK] Seq=174 Ack=4925 Win=17472 Len=0 TSV=17366108 TSER=3514395479
  2.502879  192.168.1.225 -> x.x.x.180 POP Request: \026\003\001\000f\020\000\000b\000`\316vV;\355\273\263\322\346\330\330\366jS?\374\276,\367\261\316\355\355\017\211\324`\017\226\254\222\244\345\261\337,D,\3032%\337k\3667\206a\314A\225X\303\333\267\350\362'\301\2275\214\265J'A\341m\353v\340_9?\303\333Zh\246\244\v\362Ej\324qr\004\252\376\213G\270>\352\241m\024\003\001\000\001\001\026\003\001\0000GX#\030E\243\373\277\024|\214~\035\036\032h\215\273\273\234\016\341\217:\265\243rz\a\270*E\306\276\276;\301\234\2718[\217r\353\260\365\231\323
  2.765868  x.x.x.180 -> 192.168.1.225 POP Continuation
  2.964752  192.168.1.225 -> x.x.x.180 TCP 49454 > 110 [ACK] Seq=340 Ack=4931 Win=17464 Len=0 TSV=17366155 TSER=3514395548
  3.227486  x.x.x.180 -> 192.168.1.225 POP Continuation
  3.229354  192.168.1.225 -> x.x.x.180 POP Request: \027\003\001\000 \342F\367T\203\213\354\177
  3.486224  x.x.x.180 -> 192.168.1.225 POP Continuation
  3.489983  192.168.1.225 -> x.x.x.180 POP Request: \027\003\001\000 MJ
  3.746227  x.x.x.180 -> 192.168.1.225 POP Continuation
  3.750814  192.168.1.225 -> x.x.x.180 POP Request: \027\003\001\0000\374PT\353
  4.007085  x.x.x.180 -> 192.168.1.225 POP Continuation
  4.021543  192.168.1.225 -> x.x.x.180 POP Request: \027\003\001\000@\031\2526\370\355\264\212\305\332\002\246\316\242+\353E\023U\341\242C(M\303\332\240\347~_\225\225`\271\205\262{h[\322\256\362#\372\004V[\316\022\312\334>\230\027c}\310F\326\037\236*\276\316\017
  4.284250  x.x.x.180 -> 192.168.1.225 POP Continuation
  4.301080  192.168.1.225 -> x.x.x.180 POP Request: \027\003\001\000 \375\036\343\331\2275\225M\311\222\261\202\334\302\346Zk\275\002\361\340\271;#cX1\025\004\272/\025
  4.558686  x.x.x.180 -> 192.168.1.225 POP Continuation
  4.585215  192.168.1.225 -> x.x.x.180 POP Request: \027\003\001\000 sy\324D\031\336\376P\340\225c\307\214\032\332\356\255T\027fo\362\333\3020Y\020\205P\237\344\305
  4.841129  x.x.x.180 -> 192.168.1.225 POP Continuation
  4.841541  x.x.x.180 -> 192.168.1.225 POP Continuation
  4.841606  192.168.1.225 -> x.x.x.180 TCP 49454 > 110 [ACK] Seq=610 Ack=5468 Win=16928 Len=0 TSV=17366343 TSER=3514396067
  4.854393  192.168.1.225 -> x.x.x.180 TCP 49454 > 110 [FIN, ACK] Seq=610 Ack=5468 Win=16928 Len=0 TSV=17366344 TSER=3514396067
  5.112080  x.x.x.180 -> 192.168.1.225 TCP 110 > 49454 [ACK] Seq=5468 Ack=611 Win=7936 Len=0 TSV=3514396135 TSER=17366344
Attachments:
 
mail-working.txt (33 KB) (File Type Details) 
K12 text file - mail working (open in wireshark)
 
 
mail-not-working.txt (3 KB) (File Type Details) 
K12 text file - mail NOT working (open in wireshark)
 
[+][-]05/05/09 07:55 AM, ID: 24305391Expert Comment

At Experts Exchange, members can ask their questions to thousands of technology professionals, also known as Experts. Experts compete and collaborate to answer those questions by leaving comments like this one.

Start your 30-day free trial to view this Expert Comment or ask the Experts your question.

 
[+][-]05/05/09 01:22 PM, ID: 24308785Author Comment

Often, when Experts are collaborating with members who have asked questions, they will request additional information about the problem. Askers respond with an author comment like this one.

Start your 30-day free trial to view this Author Comment or ask the Experts your question.

 
[+][-]05/05/09 01:32 PM, ID: 24308860Accepted Solution

View this solution now by starting your 30-day free trial. Setting up your free trial is quick, easy, and secure. We will return you to this solution, unlocked, when you're done.

About this solution

Zones: Thunderbird Email Client, Anti-Virus, Anti-Virus Applications
Tags: avg anti-virus, thunderbird email
Sign Up Now!
Solution Provided By: warturtle
Participating Experts: 1
Solution Grade: C
 
[+][-]05/06/09 08:05 PM, ID: 24321877Author Comment

Often, when Experts are collaborating with members who have asked questions, they will request additional information about the problem. Askers respond with an author comment like this one.

Start your 30-day free trial to view this Author Comment or ask the Experts your question.

 
[+][-]05/06/09 08:12 PM, ID: 24321898Author Comment

Often, when Experts are collaborating with members who have asked questions, they will request additional information about the problem. Askers respond with an author comment like this one.

Start your 30-day free trial to view this Author Comment or ask the Experts your question.

 
[+][-]05/07/09 02:05 AM, ID: 24323526Expert Comment

At Experts Exchange, members can ask their questions to thousands of technology professionals, also known as Experts. Experts compete and collaborate to answer those questions by leaving comments like this one.

Start your 30-day free trial to view this Expert Comment or ask the Experts your question.

 
 
Loading Advertisement...
20091111-EE-VQP-89 - Hierarchy / EE_QW_3_20080625