How to backup firefox bookmarks

1. Click the Bookmarks button on the right side of the navigation toolbar and select Show All Bookmarks to open the Library window.
2. From the toolbar on the Library window, click Import and Backup and choose Export Bookmarks to HTML....
   
   
3. In the Export Bookmarks File window that opens, choose a location to save the file, which is named bookmarks.html by default. The desktop is usually a good spot, but any place that is easy to remember will work.
4. Click the Save button. The Export Bookmarks File window will close.
5. Close the Library window.

Your bookmarks are now successfully exported from Firefox. The bookmarks HTML file you saved is now ready to be imported into another web browser.

List of commonly used TCP and UDP port numbers

Port Number	Protocol	Function
21	TCP	FTP (File Transfer Protocol)
22	TCP/UDP	SSH (ssh,scp copy or sftp)
23	TCP/UDP	Telnet
25	TCP/UDP	SMTP (for sending outgoing emails)
42	TCP/ UDP	WINS replication
43	TCP	WHOIS function
53	TCP/UDP	DNS Server (Domain name service for DNS requests)
67	TCP	DHCP Server
68	UDP	DHCP Client
70	TCP	Gopher Protocol
88	TCP/ UDP	Kerberos
79	TCP	Finger protocol
110	TCP	POP3 (for receiving email)
115		SFTP
119	TCP	NNTP (Network News Transfer Protocol)
123	UDP	NTP
143	TCP/UDP	IMAP4 Protocol (for email service)
161	UDP	SNMP
179	TCP	BGP
194	TCP	IRC
389	TCP/UDP	LDAP (light weight directory access)
443	TCP	Secure HTTP over SSL (https)
445	TCP/ UDP	SMB over IP (Microsoft-DS)
465	TCP	Secure SMTP (email) using SSL
990	TCP/UDP	Secure FTP using SSL
993	TCP	Secure IMAP protocol over SSL (for emails)
1433	TCP/UDP	Microsoft SQL server port
1512	TCP/ UDP	WINS resolution
2082	TCP	Cpanel default port
2083	TCP	Cpanel over SSL
2086	TCP	Cpanel Webhost Manager (default)
2087	TCP	Cpanel Webhost Manager (with https)
2095	TCP	Cpanel Webmail
2096	TCP	Cpanel secure webmail over SSL
2222	TCP	DirectAdmin Server Control Panel
3268	TCP	Global Catalog
3269	TCP	Global catalog LDAP over SSL
3306	TCP/UDP	MySQL Database Server
3389	TCP	RDP
4643	TCP	Virtuosso Power Panel
5432	TCP	PostgreSQL Database Server
8080	TCP	HTTP port (alternative one for port 80)
8087	TCP	Plesk Control Panel Port (default)
8443	TCP	Plesk Server Control Panel over SSL
9999	TCP	Urchin Web Analytics
10000	TCP	Webmin Server Control Panel
19638	TCP	Ensim Server Control Panel