Slow telnet/pop3 connection
I'm transitioning to a new linux server (based on linuxfromscratch) and have noticed a significant deterioration in connection time
for telnet and pop3 connections, but not ssh connections (all using the same "telnet" client on some Windows Vista boxes).
What's weird is that similar connections made to the old linux server -- which is plugged into the same switch -- are still quite
fast.
I've read that this typically involves problems with reverse DNS lookups, but I tried using IP adddresses on the telnet client,
rather than names, and it's just as slow.
Suggestions or references would be most appreciated. This isn't a deal killer...but it is annoying, and quite perplexing.
- Mark
.
Relevant Pages
- Re: Cant connect to port 25 from another system
... port 25 and did a make to update sendmail.cf. ... restarted sendmail. ... When I attempt to telnet to port 25 the connection fails. ... on where outbound smtp connections are okay but smtp sessions ... (Fedora) - Re: Cant connect to port 25 from another system
... Maybe there is a strict definition on which connections ... I have sendmail running ... Both netstat and nmap confirm that the system *is* listening on port ... When I attempt to telnet to port 25 the connection fails. ... (Fedora) - Re: Fixed device names for incoming Telnet connections?
... >>connections based on, say, the IP address of the originating interface? ... >>and of course specify the Whatever and anything else to tell the Telnet ... attach to TNBn: worth investigating? ... (comp.os.vms) - Re: Moving to SMTP Email Connection
... I have now managed to get access via telnet, whilst connected to the router, by forwarding the port on the ISA server, so that at least now looks ok. ... I have set up one of my domains to have it's MX records adjusted at the ISP and connecting to that address also works now on telnet. ... My feeling at this point is that there may be two separate issues, one of getting into the network on port 25 from outside, and possibly an ISA one, though it's also possible that ISA is by default supposed to refuse connections from machines in the 'outer' network. ... (microsoft.public.windows.server.sbs) - Telnet connection closes immediately upon connecting
... I have a legacy application that I have running on a couple of RHEL AS ... servers that requires telnet connections. ... (RedHat) |
|