Author

Topic: Connections to remote servers/ports by Electrum? (Read 260 times)

newbie
Activity: 3
Merit: 0
December 06, 2017, 01:39:54 AM
#5
443, ok!

But what about pop3 and pop3-ssl? (110 and 995)
legendary
Activity: 3472
Merit: 10611
Well, in the "options" there is no way to setup any port.
there is no option for it because you are not supposed to set it, the Servers are already on those ports. 90% on 50002 and 10% on different ports. and you just choose one and start connecting over that port and listening to incoming transmissions over that port.

Quote
If I block the 443, I cannot get the rates.

it is because Electrum gets the rates from websites (APIs) such as Coindesk, bitcoinaverage. and these sites use SSL encryption which happens to be using port 443. similar to visiting https://something.com
newbie
Activity: 3
Merit: 0
Well, in the "options" there is no way to setup any port.

For example right now my firewall asked about:

Trying to connect to electrum.hsmiths.com (76.174.26.91) on 995 (OUTbound). What is my client sending?! Why?

Trying to connect to apiv2.bitcoinaverage.com on 443, OK, as I am getting rates from them.

And in the firewall log there are ongoing connections on 50002, no problem there.

If I block the 995 (and sometimes 110 when asked), all seems to work.
If I block the 443, I cannot get the rates.
legendary
Activity: 3472
Merit: 10611
interesting!
majority of the Electrum nodes are connected over port 50002. i never checked this but my understanding was to prevent interference with similar applications. for example bitcoin core uses port 8333

having different ports like 110 and 995 or 443 which is SSL thing might also in case someone had his other ports closed and could not connect over them.
newbie
Activity: 3
Merit: 0
Hello,

When I launch Electrum, I am asked to allow or deny connections on ports 110 (ecdsa.net), 995 (various IP addresses), and 443.

443, understood.

But what about 110 and 995? I saw that when I deny those connections, I am still getting the rate... What are those connections for?

Thank you!
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