Digital Subscriber Line Upgrade of LinkSys BEFSR11 firmware broke SMTP & Telnet

> I have a LinkSys BEFSR11 router connected to Verizon DSL.
>
> The router was working well, and all PC Internet programs were working

> I upgraded the firmware to v1.46 because I liked some of the new features
> offered.
>
> After upgrading the firmware, doing a full reset and re-entering all of my
> settings everything looked OK at first glance. Upon further testing I

> that my outgoing email was not working, as well as a Telnet service I had
> running on port 4000.
>
> Incoming email is OK, PCAnywhere is OK, Remote Desktop is OK.
>
> I have rechecked the port forwarding settings for the Telnet service on

> 4000, it is correct.
>
> I have checked that MTU is set to what it was previously set to, 1492.
> I double checked my MTU settings by doing a ping -f -l xxxx
>
> I have tried adding ports triggering for 110 and 4000, didn't help.
>
> I called LinkSys, but talking to the tech was like talking to a brick

> I could tell from the questions he asked that he just didn't understand

> nature of the problem (or English!).
>
> I am considering downgrading the firmware, but before I did I wanted to

> if anyone here had any ideas on getting this version working correctly.
>
> Thanks for you help.
>
>

> I have a LinkSys BEFSR11 router connected to Verizon DSL.
>
> The router was working well, and all PC Internet programs were working fine.
> I upgraded the firmware to v1.46 because I liked some of the new features
> offered.
>
> After upgrading the firmware, doing a full reset and re-entering all of my
> settings everything looked OK at first glance. Upon further testing I found
> that my outgoing email was not working, as well as a Telnet service I had
> running on port 4000.
>
> Incoming email is OK, PCAnywhere is OK, Remote Desktop is OK.
>
> I have rechecked the port forwarding settings for the Telnet service on port
> 4000, it is correct.
>
> I have checked that MTU is set to what it was previously set to, 1492.
> I double checked my MTU settings by doing a ping -f -l xxxx
>
> I have tried adding ports triggering for 110 and 4000, didn't help.
>
> I called LinkSys, but talking to the tech was like talking to a brick wall.
> I could tell from the questions he asked that he just didn't understand the
> nature of the problem (or English!).
>
> I am considering downgrading the firmware, but before I did I wanted to see
> if anyone here had any ideas on getting this version working correctly.
>
> Thanks for you help.

| > I have a LinkSys BEFSR11 router connected to Verizon DSL.
| >
| > The router was working well, and all PC Internet programs were working fine.
| > I upgraded the firmware to v1.46 because I liked some of the new features
| > offered.
| >
| > After upgrading the firmware, doing a full reset and re-entering all of my
| > settings everything looked OK at first glance. Upon further testing I found
| > that my outgoing email was not working, as well as a Telnet service I had
| > running on port 4000.
| >
| > Incoming email is OK, PCAnywhere is OK, Remote Desktop is OK.
| >
| > I have rechecked the port forwarding settings for the Telnet service on port
| > 4000, it is correct.
| >
| > I have checked that MTU is set to what it was previously set to, 1492.
| > I double checked my MTU settings by doing a ping -f -l xxxx
| >
| > I have tried adding ports triggering for 110 and 4000, didn't help.
| >
| > I called LinkSys, but talking to the tech was like talking to a brick wall.
| > I could tell from the questions he asked that he just didn't understand the
| > nature of the problem (or English!).
| >
| > I am considering downgrading the firmware, but before I did I wanted to see
| > if anyone here had any ideas on getting this version working correctly.
| >
| > Thanks for you help.

> If you have problems sending email greater than 1-2KB over DSL than you are

> using PPPoE and have a MTU problem.
>
> Make sure the Router MTU set to 1492. You can also try DSLReports, DRTcp.exe,

> PC to MTU=1492 as well.
>
> Dave
>
>
>
>
> | There is definitely a problem with outbound SMTP connections to some
> | ISPs after the 1.46 firmware upgrade. (I'm using Bell Canada's
> | business DSL and had the same problem.) Outgoing SMTP connections
> | over 1-2k time out. Rolling back the firmware to 1.45.11 fixes the
> | problem, but re-introduces the DHCP renewal bug on PPPoE connections.
> | If you roll back to 1.45.x and find your connection drops or your
> | router crashes, try v1.44.2. You can get it at:
> |
> | ftp://ftp.linksys.com/pub/befsr41/befsr-fw-1442.zip
> |
> |
> |

> | > I have a LinkSys BEFSR11 router connected to Verizon DSL.
> | >
> | > The router was working well, and all PC Internet programs were working

> | > I upgraded the firmware to v1.46 because I liked some of the new features
> | > offered.
> | >
> | > After upgrading the firmware, doing a full reset and re-entering all of my
> | > settings everything looked OK at first glance. Upon further testing I found
> | > that my outgoing email was not working, as well as a Telnet service I had
> | > running on port 4000.
> | >
> | > Incoming email is OK, PCAnywhere is OK, Remote Desktop is OK.
> | >
> | > I have rechecked the port forwarding settings for the Telnet service on

> | > 4000, it is correct.
> | >
> | > I have checked that MTU is set to what it was previously set to, 1492.
> | > I double checked my MTU settings by doing a ping -f -l xxxx
> | >
> | > I have tried adding ports triggering for 110 and 4000, didn't help.
> | >
> | > I called LinkSys, but talking to the tech was like talking to a brick wall.
> | > I could tell from the questions he asked that he just didn't understand the
> | > nature of the problem (or English!).
> | >
> | > I am considering downgrading the firmware, but before I did I wanted to see
> | > if anyone here had any ideas on getting this version working correctly.
> | >
> | > Thanks for you help.